Toshiba L5232 manuel d'utilisation

6F8A0917 NOTES Before using the equipment, please read this manual carefully and understand the contents, and then use the equipment correctly . • NEVER attempt to operate the equipment in any ways that are not described in this instruction manual. • After reading this manual, store it with ca re in a place where it can be referred to whenever [...]

6F8A0917 - 1 - NOTICE Thank you very much for your purchase of our LF232 T ype Electromagnetic Flowmeter Converter . This instruction manual describes about the precautions required when using the LF232 converter , installation, configuration and mainte nance. It is intended for the personnel in charge of the installation, o peration and maintenanc[...]

6F8A0917 - 2 - SAFETY PRECAUTIONS Safety signs and labels affixed to the product and/or described in this manual give important information for using the product safely . They help prevent damage to property and obviate hazards for persons using the product. Make yourself familiar with signal words and symbols used for safety signs and labels. Then[...]

6F8A0917 - 3 - SAFETY PRECAUTIONS (continued) Safety Precautions for Installation and Wiring Do not use the LF232 in an explosive atmosphere . Use an appropriate device to carry and install the LF232. DON’T Using this product in an explosive atmosphere can cause explosion . DO If this product falls to the ground , injury , or malfunction of or da[...]

6F8A0917 - 4 - SAFETY PRECAUTIONS (continued) Safety Precautions for Maintenance and Inspection Do not touch the LF232 main body when high temperature fluid is being measured. Do not conduct wiring work when power is applied . DON’T The fluid raises the main body temperature and can cause burns when touched. DON’T W iring while power is applied[...]

6F8A0917 - 5 - Handling Precautions T o obtain the optimum performance from the LF232 converter for years of continuous operation, observe the following precautions. (1) Do not store or install the flowmeter in: • Places where ther e is direct sunlight . If this is unavoidable, use an appropriate sunshade . If the control keys (infrared switches)[...]

6F8A0917 - 6 - Handling Precautions (continued) (6) The converter housing covers and the cable connections are tightened secu rely at the time of shipment. Do not remove these covers or conn ections unless it is necessary to wire new cables or replace old ones. Otherwise, gradual deterioration of ci rcuit isolation or damage to this product can be [...]

6F8A0917 - 7 - T able of Content s 1. Product Inspection and Storage ··················································································· 10 1.1 Product Inspection ············································[...]

6F8A0917 - 8 - 8. Parameter Settings / Adjustment ················································································· 55 8.1 Parameter Setting Items ·····················································[...]

6F8A0917 - 9 - 10.4 Flow Rate High/Low Limit Alarm Output ··································································· 138 10.5 Fluid Empty Alarm Output ·····························································?[...]

6F8A0917 - 10 - 1. Product Inspection and S torage 1.1 Product Inspection The LF232 electromagnetic flowmeter is shipped in a cardboard box filled with cushioning materials. Open the package and ch eck the following items: Are the following items included? Electromagnetic flowmeter main unit ····························?[...]

6F8A0917 - 11 - 2. Overview The electromagnetic flowmeter is an instrument to measure the volumetric flow rate of conductive fluids using Faraday's law of electromagnetic induction. The flowmeter consists of a detector which gene rates a signal of electromotive force proportional to the flow rate of the fluid and detects this signal, and a con[...]

6F8A0917 - 12 - 3. Names of Part s Appearance Mounting plate Display section Operation switch (Infrared switch) Converter cover Converte r cover mounting screw Mounting plate Cable connection for signal cable Cable connection for power cable Ground terminal Cable connection for excitation cable Cable connection for output cable Cable connection for[...]

6F8A0917 - 13 - Internal structure (with converter cover opened) Display section (LCD) Operation switch (Infrared switch) Fuse holder Power swit ch Terminal block Prote ction cover[...]

6F8A0917 - 14 - T erminal block construction Detector connection terminals Digital I/O terminals Power supply terminals Power swit ch Protection cover Internal ground term inal Fuse holders The labe l shown left is p laced near the terminal board for po wer supply on the converter . Be alert to electric shock . 4 20mADC current output terminals[...]

6F8A0917 - 15 - 4. Inst allation Cautionary notes on installation Do not use the LF232 in an explosive atmosphere . Use an appropriate device to carry and install the LF232. DON’T Using this product in an explosive atmosphere can cause explosion . DO If this product falls to the ground , injury , or malfunction of or damage to the product, can be[...]

6F8A0917 - 16 - 4.1 Cautionary Notes on Selecting the Inst allation Location (1) A void places within the immediate proximity of the equipm ent producing interference to measurement (such as motors, transformers, ra dio transmitters, electrolytic cells, or other equipment causing electromagnetic or electrostatic interference). (2) A void places whe[...]

6F8A0917 - 17 - 4.2 How to Inst all the Converter The converter can be mounted on a panel, wall or on a pi pe stand. Install the converter so that the front of the converter cover stays vertically straight and the cable ports of the converter stay at the bottom. Figure 4.1 shows an example of panel and wall mounting installati on and Figure 4.2 sho[...]

6F8A0917 - 18 - Figure 4.2 Example of Pipe Mounting 14.57 (370 ) M10 U bolt, etc 2” (50A) PIPE Unit: inch (mm) 2.91 (74)[...]

6F8A0917 - 19 - 5. Wiring Cautionary notes on wiring urn off mains power before working on pipes. Install a switch and fuse to isolate the LF232 from mains power . DO W orking on p ipes while power is applied can cause electric shock . DO Power supply from mains power can cause electric shock or circuit break-down. Do not work on piping and wiring [...]

6F8A0917 - 20 - (4) If the converter needs to be installed in a loca tion where watertight installation is required, make unused cable ports watertight. (Be careful that th e attached blind plate is used for dustproof purpose and it is not effective for watertight installation.) (5) The converter has a surge arrestor/protector in stalled inside. Th[...]

6F8A0917 - 21 - 5.2 External Connections The external connections of the converter are shown in Figure 5.1. See 5.4 “W iring Method” to connect the cables correctly Terminal block IV wire 5.5mm 2 or more Class D gr ounding (Ground resistance 100 or less) Thick steel conduit Flow rate signal cable (2-core shie lded cab tyre cable) Connected de t[...]

6F8A0917 - 22 - 5.3 Cautionary Notes on W iring 5.3.1 Cautionary Notes on Wi ring between Detector and Converter • Flow rate signal cable and excitation cable are attached to the detector . Be sure to use the attached cables. Note: If the length of the cables exceeds 30m, the cables may not be attached. Check whether the cables are attached or no[...]

6F8A0917 - 23 - 5.4 Wiring Method Do not conduct wiring work when power is applied . Do not work on piping and wiring with wet hands . DON’T W iring while power is applied can cause electric shock . DON’T W et hands may result in elect ric shock . 5.4.1 T erminal T reatment of Cables Proceed as follows to treat the terminals at the c onverter s[...]

6F8A0917 - 24 - Connecting the input signal cable Strip the sheath from the end of each wire of a 2- core individually shield ed cable as shown in Figure 5.3 and attach and crimp an M4 crimping te rm i nal with insulating sleeve to the end of each wire. Connect the crimped terminals to the A and B terminals of the terminal block. T wist the shields[...]

6F8A0917 - 25 - Power cable, current output cable and digital I/O cables Necessary cables should be purchased and prepared by the agent in charge of ins tallation. Strip the sheath from the end of each wire and attach and crimp an M4 crimping terminal with insulated sleeve to the end of each wire. • Connect the power cable terminals to L1 and L2 [...]

6F8A0917 - 26 - Referring to 5.2 "External Connections," connect each cable to the terminal block. T ighten the screws of the terminal block tightly to make them secure ly connected. A loose connection may cause incorrect measurement. After connecting each cable, try to pull it to check whether it has been connected securely . Phillips sc[...]

6F8A0917 - 27 - 5.4.3 Grounding The external ground terminal of the detector and th e FG term inal of the converter (or external ground terminal of the converter) must be grounded secu rely with Class D groun ding (grounding resistance 100 Ω or less). Use an IV wire 5.5mm 2 or more for grounding wire. In addition, do not share the grounding wire [...]

6F8A0917 - 28 - ABX G Y E Converter terminal block Extern al groun d term inal Twisting shields Input signal cable Twisting shields Excitation c able Detector terminal block ABX GE Y F G Ground termi nal Class D grounding (Ground resistance 100 or less) Figure 5.9 (b) Wiring between Detector and Converter (wh en grounding for detector is difficult)[...]

6F8A0917 - 29 - 5.5 Digit al I/O Connections Digital I/O terminals consist of four contact out put ter minals (DO1 to DO4) and two voltage signal input terminals (DI1 and DI2), and each term inal is isolated from internal circuits. The terminal CO2 is the signal common for DO2 to DO4 and the terminal CI is the signal common for DI1 and DI2. For det[...]

6F8A0917 - 30 - 5.6 Cautionary Notes on Replacing Converter 5.6.1 Replacing the LF230 Converter The following precautions must be taken to re place the conventional type LF230 with LF232. Installation • Since the hole diameter and pitch for mounting f itti ng, and the dimensions of the LF232 converter main unit are the same as those of the LF230 [...]

6F8A0917 - 31 - 5.6.2 Combination with an Existing Detector (for Large Meter Size) When the LF232 flowmeter converter (LF232*B for large me ter size) is combined with an existing detector of commercial power excitation method, the ex citation current may not be come stable because of the d ifference of the excitation method. (Example of symptoms) ?[...]

6F8A0917 - 32 - 5.6.3 Replacement of partiall y filled pipes type When detector of partially filled pipes type is replaced from LF502 or LF502(FS2 type) to LF232*F, please be careful to the following p oints. • Installing In the case of replacement from LF502(FS2 type): The diameter of hole, width of installation m e tal fittings of LF232, an ext[...]

6F8A0917 - 33 - • Wirering ・ Hole position of cable connection mouth of LF 232* F is the same as LF502 (type FS2). ・ Because specifications of cable connection mouth are di fferent in the following po ints, Please be careful. T able 5.4 Cable connection mouth specification comparison list (Partially filled pipes type) Model LF502 LF502 (type [...]

6F8A0917 - 34 - 6. Operation Do not touch the LF232 main body when high temperature fluid is being measured. DON’T The fluid raises the main body temperature and can cause burns when touched. For operation, follow the procedure described below . Inspection for each part Is the wiring and connection between the detector and converter correct? Is t[...]

6F8A0917 - 35 - Note: If the fluid to be measured is not filled in the detector pipe (When detector is partially filled pipes type, water level is not enough), flow rate becomes inconsistent and measurement cannot be performed correctly . Be sure to use the flowmeter while the fluid to be measured is filled in the detector pipe.[...]

6F8A0917 - 36 - 7. Display and Controls For the LF232 converter , the measured value can be displayed and the parame ters can be checked or set using the LCD display and operation switches. The operation switches are non-contact type (infra red method) and can be operated without op ening the converter cover (operable also while the cover is opened[...]

6F8A0917 - 37 - 7.1 Names and Functions of Display and Controls Display Operation switch (Infrared switch) Figure 7.2 Display and Controls LCD display A 16-character × 2-line liquid crystal display with backlight is used. Instantaneous flow rate and total flow , and various constants such as parameters can be displayed. In addition, the backlight [...]

6F8A0917 - 38 - Instructions The operation principle of infrared switch is to irradiate infrared to the front of control panel and detect th e reflection from finger when operating. Normal operation is impeded depend ing on the conditions such as disturbing light from surroundings or st ain attached to the control panel. When unable to avoid such c[...]

6F8A0917 - 39 - Functions of each switch Switch Basic function • Moves the m ode from the m easurement mode to menu display 10 .00 m/s 10 0.0 % ENTER 111 000 (Measurement mode) (Menu lock cancellation screen) • Moves the m ode to the setting, calibrat ion or measurement m ode A 1:EX CURR A1:EX CURR 0.2100A (Menu display) (Setting mode) • W ri[...]

6F8A0917 - 40 - Note : There is not this screen to t he converter before serial No.07232099 9. ( Menu screen is displayed. Menu lock cancellation screen is not displayed. ) Switch Basic function • Returns the screen from the parameter display screen to the menu display screen. • Returns the screen from the param eter input screen (Curs or ON) o[...]

6F8A0917 - 41 - (2) T o tal count display F 9 9 9 9 9 9 9 9 C “C” is displayed when cou nting is in progress. T otal value is displayed in th e unit of count When the count exceeds the maxim um value of 99999999, the coun t will be reset to 0 and will be counted again. In the case of forward flow co unt, “F” is displayed. In the case of rev[...]

6F8A0917 - 42 - Notes on total flow value display Note 1: The total flow value and the total diffe rence flow value are displayed to the least significant digit of the set count rate. Example: When the set count rate is 0.0001 m 3 T otal flow / total difference flow display becomes and the value increases in increments of 0.0001 m 3 . If the value [...]

6F8A0917 - 43 - (7) Error message / other message display E X C U R R E N T O P E N If an error or alarm condition occurs, a message is displayed in the 2nd line. (8) Fixed output display * F I X O U T 2 0 . 0 m A In the fixe d output mode, a m essage is displayed i n the 2nd line. 7.3 Basic Operations ( Mode Switching, Setting Mode Operatio n, T o[...]

6F8A0917 - 44 - (2) Mode switching operation flow MENU/ENT , , and CANCEL shown in the flow diagram below indicate the switch operations and when the indicated switch is pre ssed, the process moves to the item indicated by the corresponding arrow Æ . >1:SET 2:CNT CTRL 10.00 m/s 100.0 % COUNT CTRL F 1000 m 3 M 1:MANUAL ZERO A 1 :EX CURRENT A 0 :[...]

6F8A0917 - 45 - Note 1: If password is set, the password selection screen appears. For details, see 7.3.3, “P a ssword Input.” Note 2: If no operation is performed for one minute while the mode selection screen or the setting mode menu screen is displayed, the screen returns to the measurement screen Note 3: There is not this screen to th e con[...]

6F8A0917 - 46 - 7.3.2 Setting Mode Operation Proceed as follows to select the desired item and check or change the setting values. * Switch operation indicates the switches to press. Moving to the menu display Switch operati on Display exam ple Description − 10.00 m/s 100.0 % Measured value being di splayed (measurement mode) ENTER111 0 00 V**** [...]

6F8A0917 - 47 - T o return from the menu disp lay to the measurement mode Switch operati on Display exam ple Description C0: MEAS MODE Set the digit of number for function nu mber to “0” by pressing and (Note2). The digit of letter can be set to any letter . 10.00 m/s 100.0 % The mode returns to t he measurement mode (m easured value display sc[...]

6F8A0917 - 48 - Checking or changing the setting values Switch operati on Display exam ple Description C2 : RANGE 1 Menu dis play Select the desired i tem to check or cha nge using and . C2 (RANGE 1) in this example. C2: RANGE 1 2.00000 m/s Press MENU/ENT to decide the item to check or change. The cursor dis appears and the current ly set value app[...]

6F8A0917 - 49 - 7.3.3 Password Input The password function is provided in the LF232 co nverter to prevent some functions that affect the flow measurement from being used or adjusted. If password is set, totalizer cannot be reset. For the setting menu limited by the password, see 7.4 “Setting Menu List.” In addition, for how to set passw ord, se[...]

6F8A0917 - 50 - Example of password input (mode se lection: SET and password: 123) Switch operati on Display exam ple Description INPUT PASSWOR D 0 00 The password input screen ap pears from the measurement mode. The cursor appears. Pressing CANCEL , the screen returns to the mode selection screen. INPUT PASSWOR D 1 00 Press to change the valu e to[...]

6F8A0917 - 51 - 7.3.4 T otalizer Operation In the totalizer operation mode, the totali zer can be started, stopped and reset. If password is set (if password input does not matc h), the totalizer can be started or stopped but it cannot be reset. Note: T o operate the totalizer , it is necessary to set necessary settings for the totalizer . Fo r det[...]

6F8A0917 - 52 - Example of totalizer operation Switch operati on Display exam ple Description − 10.00 m/s 100.0% (Measurement mode) ENTER111 0 00 V**** Pressing MENU/ENT in the measurement mode for 3 seconds or more, the sc reen moves to the me nu lock cancellation screen. * Pressing CANCEL in the mode selection screen, the mode returns to the me[...]

6F8A0917 - 53 - 7.3.5 Maintenance Menu If you enter the service code to release the protecti on, the maintenance specifi c items in the setting mode that are not displayed normally can be accesse d and the parameters that are normally prohibited to be rewritten can be changed. This function is mainly used by service personnel, it is not necessary f[...]

6F8A0917 - 54 - 7.4 Setting Menu List The constants set in the LF232 converter can be check ed or changed in the order shown in the table below . The details of each item are descri bed in the following sections: • Setting items (A to M): Chapter 8. “Parameter Settings / Adjustment” • Calibration item (N): Chapter 9. “Mag-Prover Calibrati[...]

6F8A0917 - 55 - 8. Parameter Settings / Adjustment 8.1 Parameter Setting Items T o check or change each constant set in the LF 232 converter , first select the desir ed setting item described in 7.3.2, “Setting Mode Operation.” For setting mode items, follow the explan ation below to perform the settings. No. Setting item Display example 8.2.1 [...]

6F8A0917 - 56 - No. Setting item Display example 8.2.16 Preset c ount value Output function setting I1: PRESET CN T I2: PRESET FN C 00009000 1:HOLD High/Low limit alarm On/Of f High/Low limit alarm value J1: H ALM SET J2: H ALM VAL 1:ON +100.0 % 8.2.17 High high/Low low limit alarm On/Off High high/Low low limit alarm value K1: HH ALM SE T K2: HH A[...]

6F8A0917 - 57 - Changing the exciting current value T o change the excitin g curr ent value, procee d as follows. Howev er , the exciting current v alue is already adjusted whe n the product is s hi pped from the factory . Do not chan ge t he exciting curr ent value unles s the value is different from the one descr ibed on the detector nameplate. I[...]

6F8A0917 - 58 - 8.2.2 Meter Size Checking the meter size of the detector Proceed as follows to check or cha nge the meter size of the detector . Switch operati on Display exam ple Description A2: METER SIZ E 50 mm Select A2: METER SIZE from the setting item selection menu. The currently set meter size of the detector appears. A 2: METER SIZE Return[...]

6F8A0917 - 59 - Changing the meter size of the detector The following is an example to cha nge the meter size from 50mm to 10mm . Switch operati on Display exam ple Description A2: METER SIZ E 50 m m Select A2: METER SIZE from the setting item selection. The currently set meter size (50mm in this example) appears. A2: METER SIZ E 50 mm The cursor a[...]

6F8A0917 - 60 - 8.2.3 Exciting Frequency The exciting frequency can be selected from 6Hz, 12H z and 24Hz. Since the features shown below are apparent depending on the exciting frequency , select an appropriate exciting frequency . Exciting frequency 6Hz 12Hz 24Hz Zero-point stability Good Response Good Fluid noise immunity Good However , the range [...]

6F8A0917 - 61 - Changing the setting value for exciting frequency . The following is an example to change the exciting frequency from 24Hz to 12H z. Switch operati on Display exam ple Description A3: EX. FREQ. 24 Hz Select A3: EX FREQ. from the setting item selection menu. The currently set exciting frequ ency (24Hz in this example) appears. A3: EX[...]

6F8A0917 - 62 - 8.2.4 Flow Direction The flow direction of fluid can be set. Normally use the flowmeter under the condition of NORMAL. Selection item Description 1: NORMAL The flow is a direct flow when the fluid flows in the direct ion indicated by the arro w on the detector . 2: SWITCH The flow is a direct flow when the fluid flows in the re vers[...]

6F8A0917 - 63 - Changing the flow direction. The following is an example to show how to change the flow direction from NORMAL to SWITCH. Switch operati on Display exam ple Description A4: FLOW DIRC TN 1:NORMAL Select A4: FLOW DIRCTN from the setting item selection menu. The currently set flow directio n (NORMAL in this example) appears. A4: FLOW DI[...]

6F8A0917 - 64 - 8.2.5 Password Setting The password function is provided to prohibit the setti ngs and adjustment for the functions that affect the flow measurement. See 7.4 “Setting Menu List” fo r the functions limited by the password function. If other than “000” is set for password and the mode is retuned to t he measurement mode, the p[...]

6F8A0917 - 65 - Changing the password The following is an example to show how to change the password from 123 to 453. Switch operati on Display exam ple Description A5: PASSWORD 123 Select A5: P ASSWORD from the setting item selection menu. The currently set password data ( 123 in this example) appe ars. However , if a wrong passw ord is entered wh[...]

6F8A0917 - 66 - 8.2.6 Normal Indicating Unit Y ou can select one of the units listed below as nor mal indicating unit for 2 types of units, m ain unit (UNIT 1) and sub unit (UNIT 2) to be displayed in the measurement mode. • Flow velocity unit: m/s, ft/s • Flow rate unit: m 3 /s, m 3 /m in, m 3 /h, m 3 /d l/s, l/min, l/h, l/d ml/s, ml/min, ml/h[...]

6F8A0917 - 67 - Checking the normal indicating unit The following is an example to change the main indicating unit (UNIT1) from % to ml/s. In the case of sub unit (UNIT2), select the function “B2: UNIT 2.” Switch operati on Display exam ple Description B1: UNIT 1 % Select B1: UNIT 1 from th e setting item selection menu. The currently set main [...]

6F8A0917 - 68 - Changing the flow direction for total flow Proceed as follows to change the flow direction for total flow . The following is an example to show how to ch ange the main indicating unit from Forward flow (F) to Forward/Rverse automatic switching (B). In the case of sub unit (UNIT2), select the function “B2: UNIT 2.” Switch operati[...]

6F8A0917 - 69 - 8.2.7 Custom Unit The custom unit, which indicates the flow rate multiplied by an arbitrary coefficient, can be defined. The flow rate indication using the custom unit define d here can be used b y selecting CUSTOM in the indicting unit setting. The custom unit consists of an coefficient and a unit string Coefficient of custom unit [...]

6F8A0917 - 70 - Checking the coefficient of custom unit Proceed as follows to check the coefficient of custom unit. Switch operati on Display exam ple Description B3: CUSTOM DA TA 12340.00 Select B3: CUSTOM DA T A from the setting item selection menu. The currently selected coef ficient appears. B 3: CUSTOM DATA Returns to the menu of setting item [...]

6F8A0917 - 71 - Checking the unit string of custom unit Proceed as follows to check the unit string of custom unit. Switch operati on Display exam ple Description B4: CUSTOM UN IT AAA/BBB Select B4: CUSTOM DA T A from the setting item selection menu. The currently set un it appears. B 4: CUSTOM UNIT Returns to the menu of setting item selection. Ch[...]

6F8A0917 - 72 - 8.2.8 S pan V alue (Range) The following constants are set here. (1) Range type (2) Span unit (changeable only for Range 1) (3) Span value (4) Hysteresis Range type By selecting the range type, the multi-range function can be used in which the range in operation is switched between the multiple range s depending on whether the flow [...]

6F8A0917 - 73 - S pan value The span value can be set using the actual flow rate unit (m 3 /h, etc.) and flow velocity unit (m/s). (1) Setting range The span value can be set within the range of 0 –1.0 ft/s to 0 – 32.8 ft/s (0.1m/s to 10m/s) in term s of flow velocity (The range that detector can measure changes w ith detector type. T he detail[...]

6F8A0917 - 74 - Hysteresis The dead band, which is used to switch the ra nges in the case of internal automatic switching multi-range, is set here. It is not necessary to set hysteresis in other range types. (The set value will be ignored.) The hysteresis can be set within the rang e of 0 to 25% in increments of 0.1%. S pan value (range) setting fl[...]

6F8A0917 - 75 - Checking each constant How to check the Range 1 is shown here. T o check other setting values, select the following function num bers: Range type C1: RANGE TYPE Range 2 span value C3: RANGE 2 Range 3 span value C4: RANGE 3 Range 4 span value C5: RANGE 4 Hysteresis C6: RANGE HYST Switch operati on Display exam ple Description C2: RAN[...]

6F8A0917 - 76 - Changing the range type Before changing the span value, Rang type m ust be set. The following is an example to show how to ch ange the range type from Single range (1:SINGLE) to the bidirectional internal si gnal switching multi-range (3:2F-2R). Switch operati on Display exam ple Description C1: RANGE TYP E 1:SINGLE Select C1: RANGE[...]

6F8A0917 - 77 - Changing the span value The span value for each range is set. The following is an example to show how to change the span value of Range 1 from 2.0m 3/h to 100 l/min. Switch operati on Display exam ple Description C2: RANGE 1 2.0000 m3/h Select C2: RANGE 1 from the setting item selection menu. The currently set span value for Range 1[...]

6F8A0917 - 78 - Changing the hysteresis The hysteresis value is set to 3% unless otherwis e specified when the converter is shipped from the factory . The following is an example to show how to change the hysteresis value from 3% to 5%. Switch operati on Display exam ple Description C6: RANGE HYS T 03.0 % Select C6: RANGE HYST from the setting item[...]

6F8A0917 - 79 - 8.2.9 Damping Constant The damping constant is set to average out the out put fluctuations. ( The larger the damping constant, the more the output is averaged and the fluctuations can be reduced but the response becomes slower .) The damping constant can be set from 0.0s ec, 0.5sec, and 1 to 60se c (1sec each). (If detector is parti[...]

6F8A0917 - 80 - Changing the damping constant The following is an example to show how to cha nge the damping constant from 0.5 sec to 10 sec. Switch operati on Display exam ple Description D1: DAMPING 00.5 s Select D1: DAMPING from the setting item selection menu. The currently set damping con stant (0.5 s in this example) appears. D1: DAMPING 00.5[...]

6F8A0917 - 81 - 8.2.10 Low Cutof f value The low cutoff is the fuction to f orcefully fix th e current output to 0% when the flow rate becomes equal or below the low cutoff value set near 0%. The low cutoff value can b e set from 0 to 10% and in increments of 0.1%. If 0% is set, the low cutoff function does not work. Checking the low cutoff value P[...]

6F8A0917 - 82 - Changing the low cutoff value The following is an example to show how to ch ange the low cutoff value from 1.0% to 3.0%. Switch operati on Display exam ple Description D2: LOW CUT 01.0 % Select D2: LOW CUT from the setting item selection menu. The currently set low cu toff value (1.0 % in this example) appears. D2: LOW CUT 0 1.0 % T[...]

6F8A0917 - 83 - 8.2.1 1 Current Output Setting Used When an Alarm Occurs The current output value setting used when an alarm occurs is the function to fix the current output to a pre-selected value if a fluid empty alarm or a self-diagnosis alarm occurs. For the type of alarms to fix the current output , see the alarm output factor setting in 8.2.1[...]

6F8A0917 - 84 - Changing the current output value used when an alarm occurs The following is an example to show how to cha nge the current output value, which is used when an alarm occurs, from 4.0mA (2: 4.0mA) to 24.0mA or more (4: OVER 24.0mA). Switch operati on Display exam ple Description D3: 4-20 ALM. OUT 2:4.0mA Select D3: 4 − 20 ALM. OUT f[...]

6F8A0917 - 85 - 8.2.12 Display low cut On/Of f When the low output is cutof f by the setting in 8.2. 10 “Low cutoff value,” whether the instantaneous flow rate, flow velocity and % value shoul d be set to zero or not can be selected. Selection Display low cutoff 1: ON Display low cut is effective (On) Display (instantaneous flow rate, fl ow vel[...]

6F8A0917 - 86 - Changing the display low cut On/Off setting. The following is an example to show how to change the display low cut setting from 2.OFF to 1:ON. Switch operati on Display exam ple Description D4: DSP LOW C UT 2:OFF Select D3: 4 − 20 ALM. OUT from the setting item selection menu. The currently set alarm output value used when an alar[...]

6F8A0917 - 87 - 8.2.13 Output Low Limit Setting The low limit for 4 to 20mA output can be selected. If 3.2mA or 2.4mA is selected, the output value of less than 4mA (0%) can be output when the flow is in reverse direction. The output low limit setting can be selected from the items shown in the table below . Output low limit value Selection Output [...]

6F8A0917 - 88 - Changing the output low limit value setting. The following is an example to change the output low limit setting from 4.0mA (1: 4.0mA) to 3.2mA (2: 3.2mA). Switch operati on Display exam ple Description D5: LOW LIMIT 1:4.0mA Select D5: LOW LIMIT from the setting item selection menu. The currently set outpu t low limit value appears. [...]

6F8A0917 - 89 - 8.2.14 Digital I/O Function Digital I/O functions can be selected. Select the digital I/O functions from the items shown below . For details of digital I/O functions, see 10. “Function Description.” Digital output functions (co rresponding to each terminal) DO FUNCT . Digital output functions DO1 DO2 DO3 to DO 4 1: NO USE Not us[...]

6F8A0917 - 90 - Digital Input Function DI FUNCT . Digital input fun ction 1: NO USE Not used 2: C ST A/STP T otalizer Start/Stop control 3: C RES/ST A T otalizer Reset/Start control 4: RANGE S W1 Multi-range e xternal switching si gnal 1 5: ZERO ADJ S till water zero adj ustment start 6: FIXED OUT Fixed- value output mode c ontrol 7: RANGE S W2 Mul[...]

6F8A0917 - 91 - Checking each setting for digital I/O The following is an example to show how to check the function setting of Digital Output 1. T o check other setting values, select the following function num bers. Digital Output 1 F1: DO1 FNCTN Digital Output 2 F2: DO2 FNCTN Digital Output 3 F3: DO3 FNCTN Digital Output 4 F4: DO4 FNCTN Digital O[...]

6F8A0917 - 92 - Changing each setting for digital I/O The following is an example to show how to ch ange the function of Digital Output 1 from High limit alarm output (2:HIGH ALM) to Fluid empty alarm (A:EMPTY ALM). T o change other setting values, se lect the following function num bers. Digital Output 1 F1: DO1 FNCTN Digital Output 2 F2: DO2 FNCT[...]

6F8A0917 - 93 - 8.2.15 Count Rate (Pulse Rate) and Pulse Width T o talizer is incremented each time a volumetric flow set for predeterm ined count rate enters and one pulse is sent out through DO output. It is necessary to set the count rate and pulse wi dth when the total volumetric flow or count value indication is selected or when pulse output i[...]

6F8A0917 - 94 - Pulse width The pulse width for totalizer pulse output is set. If Automatic setting (1:AUTO) is selected for pulse width mode, it is not necessary to set the pulse width. • The pulse width must be set to a value within the range of 0.3ms to 500m s. If you try to set a value exceeding 500 ms, the value will be forcibly changed to 5[...]

6F8A0917 - 95 - Checking the count rate and pulse width How to check the count rate setting is shown below . T o check other setting values, select the following function num bers: Pulse width mode H2: PLS MODE Pulse width H3: PLS WIDTH Switch operati on Display exam ple Description H1: COUNT RAT E 1.00000 m3 Select H1: COUNT RA TE from the setting[...]

6F8A0917 - 96 - Changing the pulse width mode setting The following is an example to change the pul se width mode setting from 2:MANUAL to 1:AUTO. Switch operati on Display exam ple Description H2: PLS MODE 2:MANUAL Select H2: PLS MODE from the setting item selection menu. The currentl y set pulse width m ode setting appears. H2: PLS MODE 2:MANUAL [...]

6F8A0917 - 97 - Changing the pulse width The following is an example to change the pulse width from 100ms to 250m s. Switch operati on Display exam ple Description H3: PLS WIDTH 100.0 ms Select H3: PLS WIDTH from the setting item selection menu. The currently set pulse width appea rs. H3: PLS WIDTH 100.0 ms The cursor appears. Press further to move[...]

6F8A0917 - 98 - 8.2.16 Preset Counter Preset counter is the function to output a signal th rough DO when the totalized count reaches a preset value. For details of preset counter function, also see 10. “Function Description.” The following parameters can be set here: (1) Preset count value (2) Preset output function Notes • Preset counter wor[...]

6F8A0917 - 99 - Checking the preset counter setting How to check the preset count value is shown below . T o check the preset output function, select the function “I2: PRESET FNC.” Switch operati on Display exam ple Description I1: PRESET CN T 00000300 Select H1:PRESET from th e setting item select menu. The currently set preset count value app[...]

6F8A0917 - 100 - Changing the preset output function The following is an example to show how to change the preset output function from Output state hold (1/HOLD) to One-shot pulse output (2:50m s PULSE). Switch operati on Display exam ple Description I2: PRESET FN C 1:HOLD Select I2:PRESET FNC from th e setting item selection menu. The currentl y s[...]

6F8A0917 - 101 - 8.2.17 Flow Rate High/Low limit Alarm The flow rate high/low limit alarm is the function to generate an alarm when the instantaneous flow rate exceeds a preset high limit value (or low limit value). When an alarm is generated, an alarm message is displayed and a signal can be output through DO. T wo outputs are provided each for hi[...]

6F8A0917 - 102 - Checking the high/low limit alarm setting Proceed as follows to check the high/low limit alarm setting. The following is how to check whether the high limit alarm is provided (On) or not (Off). T o check other setting values, select the following function num bers: High limit value J2: H ALM V AL Low limit alarm On/Of f J3: L ALM S[...]

6F8A0917 - 103 - Changing the high/low limit alarm On/Of f The following is an example to change the high limit alarm setting from OFF to ON. T o change other high/low limit alarm On/Off setting, select the following functi ons. High limit alarm On/Of f J1: H ALM SET Low limit alarm On/Of f J3: L ALM SET High-high limit alarm On/Of f K1: HH ALM SET[...]

6F8A0917 - 104 - Changing the high/low limit value The following is an example to change the high lim it value from +105% to +103%. T o change other high/low limit value setting, select the following functions. Low limit value J4: L ALM SET High-high limit value K2: HH ALM SET Low-low limit value K4: LL ALM SET Switch operati on Display exam ple De[...]

6F8A0917 - 105 - 8.2.18 Fluid Empty Alarm Fluid empty alarm is the function to gen erate an al arm when a condition is detected in which fluid is not filled or water level is not enough in the measuring pipe of the flowmeter . If an alarm is generated, an alarm message is displayed and a signal can be output through DO. Note • T o output a fluid [...]

6F8A0917 - 106 - Changing the fluid empty alarm On/Of f setting. The following is an example to change the fl uid empty alarm setting from Alarm On (1:NORMAL) to Alarm Off (0:OFF). Switch operati on Display exam ple Description L1: EMPTY ALM 1:NORMAL Select L1:EMPTY ALM from the setting item selection menu. Then the flui d empty alarm On/Off set ti[...]

6F8A0917 - 107 - 8.2.19 Self-Diagnosis Function Self-diagnosis function is the functi on to generate an alarm if an error is found from the result of diagnosis of internal circuits, memory , etc. If an alarm is generated, an alarm message is displayed and a signal can be output through DO. The following parameters can be set here: (1) Self-diagnosi[...]

6F8A0917 - 108 - Alarm output factor setting When the diagnosis alarm is output through DO, wh ether a fluid e mpty alarm should be added to the condition for alarm output can be selected. Selection Diagnosi s error alarm factor 1: WITHOUT EM P Fluid empty alarm is not included 2: WITH EMP Fluid empty alarm is included List of alarm output factors [...]

6F8A0917 - 109 - Changing the self-diagnosis function setting The following is an example to change the sel f-diagnosis function from Se lf-diagnosis function On (1:ON) to Self-diagnosis function Off (2: OFF). T o change the setting for alarm output factors, select the function “L3: ALM PRESET .” Switch operati on Display exam ple Description L[...]

6F8A0917 - 11 0 - 8.2.20 Rate-of-Change Limit V alue and Control T ime The rate-of-change limit is the function to prevent a sudden change in flow indication of t he converter when the measurement flow signal contains excessive noise. Damping constant is also ef fective to prevent indica tion variations by increasing its value but the rate of chang[...]

6F8A0917 - 111 - Changing the rate-of-change limit setting The following is an example to change the limit value from 1.0% to 1.5%. T o change the control time, select the function “M2: LIMIT TIME.” Switch operati on Display exam ple Description M1: LIMIT RAT E 1.0 % Select M1: LIMIT RA TE from the setting item selection menu. The currently set[...]

6F8A0917 - 11 2 - 8.3 Initial Settings When Shipped from the Factory Initial settings used when shipped from the factor y unless otherwise specified are shown below . No. Parameter name Initial setting values A1 Exciting current Adjusted value when shipped from the factory (described on the detector nameplate) A2 Meter size Specified meter size whe[...]

6F8A0917 - 11 3 - No. Parameter name Initial setting values H1 Count rate Meter size 1/10" to 1/4" ( 2.5 to 6 mm) 1L Meter size 1/2" to 1 1/2” ( 15 to 40 mm) 0. 01m 3 Meter size 2" to 4” ( 50 to 100 mm) 0.1m 3 Meter size 6” to 24” (150 to 6 00mm) 1m 3 Meter size 28” to 120” (700 to 3000 mm) 10m 3 H2 Pulse width set t[...]

6F8A0917 - 11 4 - 8.4 Fixed V alue Output (Loop Check) The fixed value output is the function to outp u t a fixed current and/or a fixed pulse output independently of the flow rate signal. The following parameters can be set here: (1) Fixed value output On/Off setting (2) Fixed current output value (3) Fixed pulse output value Notes • Fixed pulse[...]

6F8A0917 - 11 5 - Fixed pulse output value The pulse frequency is set, which is used to ou tput in the fixed out put mode through the DO terminal where the pulse output function is set. The fixed pulse output value can be set within the range of 0 to 100 0pps in increments of 1pps. Note: When the pulse outp ut is sent out from DO2 terminal, up to 1[...]

6F8A0917 - 11 6 - Changing the fixed output function The following is an example to change the fixed output function fr om Fixed value output OFF to ON and then go on to set the current output value and the pulse output value. T o change the current output value or pulse output value inde pendently , select the following function: Fixed current out[...]

6F8A0917 - 11 7 - Changing the fixed output constant The following is an example to change the fixed pulse output value from 50pps to 100pps. T o change the fixed current output value, select the function “L2: FIX. CURR.” Switch operati on Display exam ple Description L3: FIX. PULS E 0050 pps Select L3: FIX. PULSE from the setting item selectio[...]

6F8A0917 - 11 8 - 8.5 Zero Adjustment 8.5.1 S till W ater Zero Adjustment Still water zero adjustm ent must be performed when the fluid in the measuring pipe of the detector stays still. Switch operati on Display exam ple Description − 10.00 m/s 100.0 % Measured value being di splayed (measurement mode) ENTER111 0 00 Pressing MENU/ENT in the meas[...]

6F8A0917 - 11 9 - E0 : MEAS MODE Returns to the measurement m ode (measured val ue display screen). 10.00 m/s 100.0 % Note1: If the flow rate value is outside of the ran ge of ± 1.25 m/s, the adjustment resu lt will not be reflected on th e flow rate measured value. Note1:If the flow rate value is outside of the range of ± 1.25 m/s, the adjustmen[...]

6F8A0917 - 120 - 8.5.2 Zero Offset Adjustment This function is used to perform zero adjustm ent simply by comparing the output of the flowmeter with other process value without stopping the process flow . If zero adjustment can be performed with still water cond ition, it is not necessary to set this adjustment value. How to calculate the zero offs[...]

6F8A0917 - 121 - Changing the zero offset adjustment value Changing the zero offset adjustm ent value from +1.0% to − 2.5%. Switch operati on Display exam ple Description O1: MANUAL ZE RO +001. 0% Select O1: MANUAL ZERO from the setting item selection menu. The currently set zero offset adjustment value appears. O1: MANUAL ZE RO +001. 0% The curs[...]

6F8A0917 - 122 - 9. Mag-Prover Calibration 9.1 Calibration Items The calibration mode of the LF232 flowmeter converter is used to check or perform zero and span calibration of the converter and check the exciting cu rrent. T o change the mode to the calibration mode, select the setting item in accordance with the procedure in 7.3.2 “Setting Mode [...]

6F8A0917 - 123 - 9.2 Converter Check / Calibration 9.2.1 0% Flow Rate Calibration (Zero Calibration) Using Mag-Prover internal calibration circuit, 0% flow rate (hereafter called zero poi nt) calibration can be performed. Checking the zero point Switch operati on Display exam ple Description P1:FLOW CAL 0 0.0 % Select P1:FLOW CAL 0 from the calibra[...]

6F8A0917 - 124 - 9.2.2 50% Flow Rate Calibration 50% flow rate value can be checked only . Checking the 50% flow rate value Switch operati on Display exam ple Description P2:FLOW SIG 5 0 50.1 % Select P2:FLOW SIG 50 from the calibration item selection menu. 50% flow rate value using the sim ulation input appears.[...]

6F8A0917 - 125 - 9.2.3 100% Flow Rate Calibration (Span Calibration) Using the Mag-Prover internal calibration circuit, 100% flow rate value (hereafter called the span value) calibration can be performed. Checking the span value Switch operati on Display exam ple Description P3:FLOW CAL10 0 100.1 % Select P3:FLOW CAL 100 from the calibration item s[...]

6F8A0917 - 126 - 9.2.4 Checking the Exciting Current V alue The monitor value of the exciting current can be checked. Checking the exciting current value Switch operati on Display exam ple Description P4:EX CURR DS P 0.2100 A Select P4:EX CURR DSP from the calibration item selection menu. Span value using the sim ulation input appears. P 4:EX CURR [...]

6F8A0917 - 127 - 10. Function Description The LF232 flowmeter converter is equipped with 4 dig ital outputs and 2 digital inputs (1 digital output as standard), enabling you to use these as various functions such as pulse outp ut and alarm outputs. Digital I/O functions are described below . Functions Descri ption Flow totalization T otalizes flow [...]

6F8A0917 - 128 - 10.1 Digit al I/O Specifications The specifications of the digital I/O terminals of the LF232 co nverter are as follows: Digital Outputs: (DO1) Output type T ransistor open collector (standard) Number of outputs 1 Capacity 30 VDC, 200 mA maximum (DO2 to DO4) Output type Solid-state contact output (non polarity) (option) Number of o[...]

6F8A0917 - 129 - 10.2 T ot alizer and Pulse Output Proceed as follows to use the totalizer and pulse output. Count Rate and Pulse W idth Settings Follow the procedure in 8.2.15 “Count Rate (Pulse Rate) and Pulse W idth” and set the flow rate per 1 count (1 pulse) (count rate), pulse width m ode and pulse width. * Count rate can be set within th[...]

6F8A0917 - 130 - * Continued from the previous page Clear (reset) the totalizer . (Note1) Press switch to clear the count. If you have changed the count rate, clear (reset) the count before you start the totalizer . Start the totalizer . (Note1) • Press to start the totalizer . Check that “C” is shown on the display indicating that counting i[...]

6F8A0917 - 131 - T otalizer operation usi ng digit al input signals T o talizer and pulse output can be operated. Remote operations of the totalizer and pulse outp ut can be performed using the Digital Input signals. Follow the procedure in 8.2.14 “Digital I/O Func tion” and set the Digital Input (DI) functions. Operation using Digital Input si[...]

6F8A0917 - 132 - 10.3 Multi-Range Functions Five types of multi-range functions can be set using the Range T ype: Range T yp (1) Single direction, 4 ranges Internal automat ic switching (2) Forward and reverse di rections, 2 ranges Internal automatic switching (3) Single direction, 2 ranges External signal switchi ng (4) Forward and reverse di rect[...]

6F8A0917 - 133 - Output performance when multiple ranges are used (1) Single direction (internal automatic switching), 4 ranges 20mA 4mA 0 0 100 125 Output (%) Range output No. 1 Range output No. 2 ON OFF ON OFF ON OFF Range 4 Range 3 Range 2 Range 1 Hysteresis (0 to 25%) Reverse direction Forward direction Flow rate • Current output is 4mA as st[...]

6F8A0917 - 134 - (2) Forward and reverse directions (i nternal automatic switching), 2 ranges Output when switched from Reverse to Forward direction Output when switched from Forward to Reverse direction OFF ON Range output No. 2 Reverse direction Flow rate 4mA 0 0 Output Forward direction Low cutoff 1.25 Low cutoff From reverse direction range to [...]

6F8A0917 - 135 - (3) Single direction (external signal switching), 2 ranges 0 125 100 4mA 0 Outpu t (%) Range 2 Range 1 ON OFF Reverse direction Flow rate Forward direction (Range output No. 1) H level input External range switching signal L level input • Current output is 4mA as standard wh en fluid flows in reverse direction. When the low cutof[...]

6F8A0917 - 136 - (4) Forward and reverse directions (external signal switching), 2 ranges 4mA 0 100 125 0 Output (%) Range 2 Range 1 Reverse direction Flow rate Forward direct ion Range 3 Range 4 ON OFF (Range output No. 1) H level input External range switching signal L level input (Range output No. 2) H level input L level input ON OFF ON OFF •[...]

6F8A0917 - 137 - (5) Single direction (external signal switching), 4 ranges 20mA 4mA 0 0 100 125 Output (%) Range 4 Range 3 R ange 2 Range 1 Reverse direction F orward direction Flow rate Exter nal range s witchi ng signal No. 1 Exter nal range s witchi ng signal No. 2 L level input H level input H level input H level input L level input L level in[...]

6F8A0917 - 138 - 10.4 Flow Rate High/Low Limit Alarm Output Proceed as follows to use the flow rate high/low limit alarm. High/Low Limit Alarm V alue Setting • Follow the procedure in 8.2.17 “Flow Rate High/Low alarm” and set the high li mit alarm, high-high limit alarm , low limit alarm or low-low limit alarm to ON and set the alarm value. F[...]

6F8A0917 - 139 - • In the case of Multi-range setting Output (%) High l imit set- pout value Low limit set- point value Range 2 Range 1 Range 2 Hysteresis 2.5% Hysteresis 2.5% Hysteresis 2.5% Low limit a larm generated High limit alarm generated Low limit alarm generated Time * High/low limit alarm set-point value is a value indicated in percent [...]

6F8A0917 - 140 - • In the case of 2 high limit alarm points (high lim it and high-high limit) Output (%) High-high limit set- point High limit set-point Hysteresis 2.5% High limit alarm gener ated High-high limit alarm generated Time * The output state when an alar m occurs becomes the state set for alarm output of digital out put. When the power[...]

6F8A0917 - 141 - 10.5 Fluid Empty Alarm Output Proceed as follows to use the fluid empty alarm. (Note: In the case of LF232*F; Fluid empty alarm f unction is not usable. Set this function 'OFF'.) Alarm Output Setting • Follow the procedure in 8.2.18 “Fluid Em pty Alarm” and set the fluid alarm setting to ON (NORMAL, SENTITIVE or SEN[...]

6F8A0917 - 142 - 10.6 Preset Counter Output Function A contact signal is output when the totalized flow count exceeds the preset value (preset count value). Proceed as follows to use the preset counter output. T o talizer Setting • Follows the procedure in 10.2 “T otali zer and Pulse Output” and set necessary items to the totalizer . Preset C[...]

6F8A0917 - 143 - Preset counter output performance • Example to reset the totalizer using an external signal input (When preset output level hold (Contact ON) is set) ON OFF 0 Reset/Start signal (DI control signal level H) Totalizer flow count Preset output Counter reset Counter start H level input L level input Preset count set-point value Count[...]

6F8A0917 - 144 - • Example to reset the totalizer using an external signal input (When one-shot pulse output is set) ON OFF 0 Reset/Start signal (DI control signal level L) Totalizer flow count Preset output Counter reset Counter start H level input L level input Preset count set-point Counter reset Preset output is OFF because Counter is reset. [...]

6F8A0917 - 145 - • Output example of one-shot pulse output ON OFF 0 100 200 Preset count set-point value: 10 0 Totalizer count Preset output Preset output OFF because pulse width is reached. Inpu t/Output T iming Ch art * Preset output goes ON when the count value exceeds the preset value of 100 and the preset output goes OFF when its width reach[...]

6F8A0917 - 146 - 10.7 Remote Still W ater Zero Adjustment Still water zero adjustm ent can be pe rformed using an external signal. T o use this function, follow the procedure in 8.2. 14, “Digital I/O Function” and set the DI as a zero adjustment start signal. [Signal input condition] Zero adjustment signal 10 secon ds 20 secon ds Zero adjustmen[...]

6F8A0917 - 147 - 10.8 Remote Selection of Fixed V alue Output 4 to 20mA output and pulse output can be set to a fixed preset value using a remote signal input. Proceed as follows to use this function. Fixed Output V alue Setting • Follow the procedure in 8.4 “Fixed V alue Output (Loop Check)” and set the current output value and pulse output [...]

6F8A0917 - 148 - 10.9 Converter Error Alarm Output If one or more of the following errors occur in a self-diagnosis sequence, an alarm signal will be output using contact signals. List of Alarm Output Factors Diagnosis error al arm outp ut (DO) Diagnosis error item WITHOUT EMP WITH EMP RAM error ROM error Exciting current value error Exciting curre[...]

6F8A0917 - 149 - 1 1 . Communications Function The LF232 Series Converters are equipped with HAR T *1 protocol to transmit digital signals over the 4 to 20mA output line. T he AF900 hand-held terminal (hereafter called HHT) can be used to check or change various parameters, calibra te the flowmeter or m onitor th e measured value from a remote plac[...]

6F8A0917 - 150 - Conv erter ter minal b lock HHT Figure 1 1.2 Connection to the Converter Main Unit[...]

6F8A0917 - 151 - 1 1.2 Procedure for Communication with HHT This section describes the HHT basic operations for comm unication between the flowmeter and HHT . For details, refer to the HHT instruction manual. * Carry ing out the following preparatory operations to a co mmercially available PDA (OS: W indows CE), the PDA can be used as a HHT . Proce[...]

6F8A0917 - 152 - 1 1.3 Cautionary Notes on Communications Observe the following limitations when you communicate with flowm eter using HHT . Current output load (1) Load resistance: 240 Ω to 1k Ω (including communications line resistance) (2) Load capacitance: 0.25 μ F m aximum (including communications line capacitance) (3) Load inductance: 4mH[...]

6F8A0917 - 153 - 12. Diagnosis and Alarms 12.1 Diagnostic messages The LF232 converter is equipped with the function t o di agnose such errors as setting errors, I/O errors or internal errors of the instrument and shows th e error messages on the LCD display or on the HHT through communications. The diagnostic messages and their corrective actions [...]

6F8A0917 - 154 - Process error alarm LCD display Description Corrective action OVER 125% The measured value is above the 125% of the span. The setting range for measured value is narrow or the flow rate is unexpectedly lar ge. Check whether the set value is correct or not and check that there is no problem in the process. UNDER – 125% The measure[...]

6F8A0917 - 155 - Self-diagnosis error The converter performs an operation check immediately after power is turned on and if an error is found, a self-diagnosis error is generated. If more than one error occurs at the same time, the contents of those errors will be displayed cyclically . The diagnosis about excitation is carried out using the i nter[...]

6F8A0917 - 156 - 12.2 Output When an Error or Alarm Occurs Error indication Measured value display Current output (4 to 20m A) T otalizer pulse output Remarks ROM ERROR (Note 1) − 4mA (s tandard) (Note 3) St opped After power-up, measurem ent does not start. RAM ERROR − 4mA (s tandard) (Note 3) St opped After power-up, measurem ent does not sta[...]

6F8A0917 - 157 - 13. Maintenance and Inspection Do not conduct wiring work when power is applied . Do not touch the LF232 main body when high temperature fluid is being measured. DON’T W iring while power is applied can cause electric shock . DON’T The fluid raises the main body temperature and can cause burns when touched. 13.1 Maintenance Mag[...]

6F8A0917 - 158 - Check / Replacement of power supply unit In general, electronic components deteriorate faster if the ambient temperature is high. The life of the power supply unit is about 10 years if the am bien t temperature is 40°C, and 5 to 6 years if the temperature is 50°C or more. T o extend the life of the flowmeter , it is reco mmended [...]

6F8A0917 - 159 - 13.2 T roubleshooting If a problem occurs, you may find a cause of the problem by performing the simple inspection. Before you call repair service personnel, inspect the flowmeter using the flowcharts shown below . 13.2.1 Flow rate is not indicated Install the cab les correctly according to 5. “Wiring.” Replace the fuse with a [...]

6F8A0917 - 160 - 13.2.2 Flow rate indication is not correct YES Connect the two load resistors in series, if necessary. Contact your nearest Toshiba representative. Aren't there two load resistors conn ected to th e output in parallel? YES NO NO Set it corre ctly according t o 8. “Parameter Settings/Adjustment.” Perform zero adjustment acc[...]

6F8A0917 - 161 - 13.2.3 Flow rate indication is not st able Use a power supply within the specified range. Ground the converter/detector with Class D ground (100 or less ground resistance) using IV wire of 5.5 mm² minimum. Design piping so that the detector pipe is filled with fluid all the time. YES Design piping so that the fluid does not carry [...]

6F8A0917 - 162 - 13.2.4 When switch operation is unable START NO Place a cover to block the li g ht from surroundin g s, or cover the control panel by hand to block the light. Does intense light shine on the control panel such as direct sunli g ht or reflected sunli g ht b y window glass or metal sheet? YES Place a cover to block the li g ht from s[...]

6F8A0917 - 163 - 14. Principle of Operation The operating principle of the electromagnetic flowmeter is based on Faraday 's Law of electromagnetic induction. The principle of operation is that an insulated pipe with inner diameter D is placed vertically to the direction of a magnetic fi eld with flux density B (see Figure 14.1). When an electr[...]

6F8A0917 - 164 - 15. Specifications 15.1 Specifications Detector Combined S pecifications 1. Measuring range: (measuring range in term s of flow velocity) 0 –1.0 ft/s to 0 – 32.8 ft/s (0 – 0 .3 m/s to 0 –10 m/s) For partially filled pipes detect ors (Combined detector is LF502) Meter Measurement range 6” (150mm) 0 – 264 GPM(std) to 0 ?[...]

6F8A0917 - 165 - 2. Measurement accuracy: (Accuracy when combined with detector) • Combined detector: LF470 (Meter size 1/10” to 1/4” (2.5 to 6mm )) Range Flow rate to the range (%) 1.0-3.3ft/s (0.3-1.0m/s ) 3.3-32. 8ft/s (1.0-10m/s ) 0 to 50 % ± 0.8 % FS ± 0.4 % FS 50 to 100 % ± 0.8 % FS ± 0.8 % of rate • Combined detector: LF150 (Mete[...]

6F8A0917 - 166 - 3. Other specifications • Conductivity: 5 μ S/cm or more (If detector is partially fille d pipes type, conductivity i s 100 μ S/cm or more) • Power supply: 100 to 24 0V AC (allowabl e voltage range: 80 to 264V AC, 50/60Hz) *1 or 24VDC (allowable voltage range: 21 to 27VDC) *2 • Power consumption: 17W (27V A ) or less (when [...]

6F8A0917 - 167 - • Range switching output One Digital Output (DO) is used • Single direction, 2-range switching signal • Forward/reverse direction switching signal T wo Digital Outputs (DO) are used • Single direction, 4-range switching signals • Forward/reverse 2-range switching signals • High/low limit alarm output An alarm is output [...]

6F8A0917 - 168 - 5. Display/setting items • Output display: 16-character × 2-line dot-matrix LCD (with back light) Indicating unit: 2 units can be selected from th e flowing units: flow velocity , instantaneous flow rate, total flow (forward/reverse/di ff erence flow), total count, %, custom unit. • Setting: V arious parameters can be set with[...]

6F8A0917 - 169 - 15.2 Model Number T able LF232*A, LF232*B Converter model number table Model number Specification code 1 2 3 4 5 6 7 8 9 10 1 1 12 Description L F 2 3 2 Separate type converter P u r p o s e A S t a n d a r d Com patible detector (Note 1) (N ote 2) (Note 3) A M e d i u m t o s m a l l s i z e (Meter size: 1/10” to 18”(2.5 to 45[...]

6F8A0917 - 170 - LF232*F (for p artially filled pipes detectors) Converter model number table Model number Specification code 1 2 3 4 5 6 7 8 9 10 1 1 12 Description L F 2 3 2 Separate type converter P u r p o s e A S t a n d a r d C o m p a t i b l e d e t e c t o r F Fo r Partially-filled pipes (Meter size : 6 ” to 24” (150mm to 600mm) ) M o [...]

6F8A0917 - 171 - 16. Outline Drawing Electromagnetic Flowmeter Converter LF232 T y pe Gross mass: approx. 18 lb(8kg) (including a mounting plate) Figure 16.1 Outline of Electromagnetic Flowmeter Converter 232 T ype 2.94(74) 8.74(222) 9.33 (237) 6.10(155) 15.75(400) φ 0.47( φ 12) hole (4 places) 2.99 (76) 2.99(76) 2.99(76) Si g nal cable connect i[...]

6F8A0917 - 172 - W rite down the address and phone number of the di stributor from which you purchased this product, the product code, SER.NO. and so on. Distributor Address Name Phone number ( ) − Product code LF SER. NO.[...]

FCF50017[...]