Fluke 724 manual

® 724 Temperat ure Ca librator Users Manual February 2000 Rev.1, 8/03 © 2000-2003 Fluke Corporation. Al l rights reserved. All product names are trademarks of their respective compani es.[...]

LIMITED WARRANTY & LIMITATION OF LIABILITY Each Fluk e product is warranted to be free f rom def ects i n m at erial and workmans hip under normal us e and s ervice. The warranty period i s three years and begi ns on the date of s hipment. P arts, produc t repairs and s ervic es are warranted for 90 day s . This warrant y extends onl y to the o[...]

i Table of Contents Title Page Introduction ................................................................................................................... .1 Contacting Fluke ............................................................................................................ 1 Standard Equipment ........................................[...]

724 Users M anual ii Using Resistanc e-Temperature Detectors (RTDs) ............................................... 23 Using Source Mode ........................................................................................................ 26 Sourcing Electrical Param eters .........................................................................[...]

Temperature Calibrator Contents (continued) iii General Specifications .............................................................................................. 43 Index .......................................................................................................................... ............. 45[...]

724 Users M anual iv[...]

v List of Tables Table Title Page 1. Summary of Sourc e and Measure Func tions ........................................................................ 2 2. International Symbols ....................................................................................................... .... 7 3. Input/Output Terminals and Connec tors ..................[...]

724 Users M anual vi[...]

vii List of Figures Figure Title Page 1. Standard Equipment ........................................................................................................... .. 6 2. Input/Output Terminals and Connec tors ............................................................................... 8 3. Keys .............................................[...]

724 Users M anual viii[...]

1 Temperature Calibrator Introduction Your Fluke 724 Temperature Calibrator is a handheld, battery-operated instrum ent that measures and sources a variety of therm ocouples and RTD s. See Table 1. In addition to the functions in Table 1, the c alibrator has the following features and functions : • A split-sc reen display . The upper display allo[...]

724 Users M anual 2 Table 1. Summary of Source and Measure Functions Function Measure Source dc V 0 V to30 V 0 V to10 V Resista nce 0 Ω to 3200 Ω 15 Ω to 3200 Ω Thermocouple Types E, J, K, T, B, R , S, L, U, N, mV RTD (Resistanc e- Temperature Detector) Pt100 Ω (385) Pt100 Ω (3926) Pt100 Ω (3916) Pt200 Ω (385) Pt500 Ω (385) Pt1000[...]

Temperature Calibrator Standard Equipment 3 Standard Equipment The items lis ted below and shown in Figure 1 are inc luded with your calibrator. If the c alibrator is damaged or something is miss ing, contact the plac e of purchase immediately . To order replacement parts or spares, s ee the user-replaceable parts list in Table 7. • TL75 test lea[...]

724 Users M anual 4 W Warning To avoid possible electric shock or personal injury: • Do not apply more than the rated voltage, as marked on the calibr ator, between the terminals, or between any terminal and earth ground. Maximum for all terminals is 30 V, 24 mA. • Before each use, verify the calibrator ’s operation by measuring a known volta[...]

Temperature Calibrator Safety Information 5 W Warning • Use only 4 AA batteries, pr operly installed in the calibrator case, to power the calibrator. • Disconnect test leads before changing to another measure or source function. • When servicing the calibrator, use only specified replacement par ts. • To avoid false readings, which could le[...]

724 Users M anual 6 100% 25% 25% RECALL STORE SETUP 0% Stackable Test Leads TL75 Test Lead Set Alligator Clips V mA MEASURE SOURCE / MEASURE 30V MAX ALL TERMINALS 4W 3W V RTD mA - TC COM COM LOOP zi01f.eps Figure 1. Standard Equipment[...]

Temperature Calibrator Safety Information 7 Table 2. International Symbols AC - Alternating current Double insulated DC - Direct current Battery Earth ground Refer to the manual for information about this feature. Pressu re O ON/OFF Conforms to C anadian Standards Assoc iation directives Conforms to European Union direc tives[...]

724 Users M anual 8 Getting Acquainted with the Calibrator Input and Output Terminals Figure 2 shows the c alibrator input and output terminals. Table 3 explains their us e. TC RTD 100% 25% 25% RECALL MEAS SOURCE STORE SETUP 0% TEMPERATURE CALIBRATOR 724 7 6 5 4 3 2 1 V LOO P mA V ˚ F ˚ C zi02f.eps Figure 2. Input/Output Terminals and Connectors[...]

Temperature Calibrator Getting Acquainted with the Calibrator 9 Table 3. Input/Output Terminals and Connectors No Name Description A , B MEASURE V, mA terminals Input terminals for measuring v oltage, current, and supply ing loop power. C TC input/output Terminal for meas uring or simulating thermoc ouples. This term inal accepts a miniature polari[...]

724 Users M anual 10 Keys Figure 3 shows the c alibrator keys and Table 4 explains their use. TC RTD 100% 25% 25% RECALL MEAS SOURCE STORE SETUP 0% TEMPERATURE CALIBRATOR 724 TC RTD 100% 25% 25% RECALL MEAS SOURCE STORE SETUP 0% TEMPERATURE CALIBRATOR 724 1 8 9 10 2 3 4 6 7 5 12 11 13 14 15 16 17 18 19 20 V mA MEASURE SOURCE / MEASURE 30V MAX ALL T[...]

Temperature Calibrator Getting Acquainted with the Calibrator 11 Table 4. Key Functions No Name Description A O Turns the power on or off. B V Selects v oltage measurem ent function in the upper display . C A Selects the m A measurem ent function in the upper display . D K Activates a 24-volt loop supply while measuring m A. E C Turns back light on[...]

724 Users M anual 12 Table 4. Key Functions (cont.) No Name Description L L Cycles through : Slow repeating 0 % - 100 % - 0 % ramp Fast repeating 0 % - 100 % - 0 % ramp Repeating 0 % - 100 % - 0 % ramp in 25 % steps AM AM OY OZ Disables Shut Down Mode Enables Shut Down Mode M XW Y Z Increases or dec reas es t he s ourc e lev el. Cycles through the [...]

Temperature Calibrator Getting Acquainted with the Calibrator 13 Display Figure 4 shows the elem ents of a ty pical display . Low Battery Symbol Loop Annunciator Memory Locations for Calibrator Setups Units Display Auto Ramp Mode Indicator sh07f.eps Figure 4. Elements of a Typical Display[...]

724 Users M anual 14 Getting Started This sec tion acquaints y ou with som e basic operations of the calibrator. Proceed as follows to perform a voltage-to-v oltage test: 1. Connect the calibrator ’ s voltage output to its voltage input as shown in Figure 5. 2. Press O to turn on the calibrator. Press l to select dc voltage (upper display ). 3. I[...]

Temperature Calibrator Shut Down Mode 15 V V TC RTD ˚ F ˚ C 100% 25% 25% RECALL LOOP mA MEAS SOURCE STORE SETUP 0% TEMPERATURE CALIBRATOR 724 zi04f.eps Figure 5. Voltage-to-Voltage Test[...]

724 Users M anual 16 Contrast Adjust ment Note Available with V2.1 Firmware or greater. To identify firmware v ersion, press and hold J when powering up. The firmware v ersion will be shown in the upper units dis play for about 1 second after initializ ation. To adjust the contras t, proceed as follows : 1. Press C and O until Contst Adjust is disp[...]

Temperature Calibrator Using Meas ure Mode 17 Using Measure Mode Measuring Electrical Paramet ers (Upper Display) To measure the c urrent or voltage output of a transmitter, use the upper display and proceed as follow s: 1. Press A to select c urrent. LOOP s hould not be on. 2. Connect the leads as shown in Figure 7. Current Measurement with Loop P[...]

724 Users M anual 18 Red TEST DC PWR + – + – – + Black TC RTD 100% 25% 25% RECALL MEAS SOURCE STORE SETUP 0% TEMPERATURE CALIBRATOR 724 V LOO P mA V ˚ F ˚ C zi06f.eps Figure 8. Connections for Supplying Loop Power[...]

Temperature Calibrator Using Meas ure Mode 19 Measuring Electrical Paramet ers (Lower Disp lay) To measure the elec trical parameters using the lower display, proc eed as follows : 1. Connect the calibrator as shown in Figure 9. 2. If necess ary, press M for M EASURE mode (low er disp lay) 3. Press l for dc voltage or current, or U for resistanc e.[...]

724 Users M anual 20 Measuring Temperat ure Using Thermocouples The calibrator supports ten standard thermoc ouples, including types E, N , J, K, T, B, R, S, L, or U. Table 5 summ arizes the ranges and c haracteris tics of the supported thermoc ouples. To measure tem perature using a thermoc ouple, proceed as follows: 1. Attach the thermocouple lea[...]

Temperature Calibrator Using Meas ure Mode 21 Table 5. Thermocouple Types Accepted Type Positive Lead Positive Lead (H) Color Negative Lead Specified Range Materia l ANSI* IEC** Materia l ( ° C) E Chromel Purple Violet Constantan -200 to 950 N N i-Cr-Si Orange Pink Ni-Si-Mg -200 to 1300 J Iron White Black Constantan -200 to 1200 K Chromel Yellow G[...]

724 Users M anual 22 V mA MEASURE SOURCE / MEASURE 30V MAX ALL TERMINALS 4W 3W V RTD TC COM COM L OOP Process Temperature Warning 30 V maximum to TC TC Miniplug zi14f.eps Figure 10. Measuring Temperatur e with a Thermocouple[...]

Temperature Calibrator Using Meas ure Mode 23 Using Resistance-Temperatur e Detectors (RTDs) The calibrator acc epts RTD ty pes show n in Table 6. RTDs are characteriz ed by their resis tance at 0 ° C (32 ° F), which is c alled the “ ice point ” or R 0 . The m ost com mon R 0 is 100 Ω . The calibrator ac cepts RTD measurem ent inputs in two[...]

724 Users M anual 24 Table 6. RTD Types Accepted RTD Type Ice Point (R 0 ) Material α Range ( ° C) Pt100 (3926) 100 Ω Platinum 0.003926 Ω / ° C -200 to 630 Pt100 (385) 100 Ω Platinum 0.00385 Ω / ° C -200 to 800 Ni120 (672) 120 Ω Nick el 0.00672 Ω / ° C -80 to 260 Pt200 (385) 200 Ω Platinum 0.00385 Ω / ° C -200 to 630 Pt500 (38[...]

Temperature Calibrator Using Meas ure Mode 25 Resistance to be measured Resistance to be measured Resistance to be measured RTD RTD RTD 2W 3W 4W V mA MEASURE SOURCE / MEASURE 30V MAX ALL TERMINALS 4W 3W V RTD TC COM COM L OOP V mA MEASURE SOURCE / MEASURE 30V MAX ALL TERMINALS 4W 3W V RTD TC COM COM L OOP V mA MEASURE SOURCE / MEASURE 30V MAX ALL T[...]

724 Users M anual 26 Using Source Mode In SOURCE mode, the calibrator generates calibrated signals for tes ting and calibrating proces s instrum ents, supplies v oltages and resis tances, and s imulates the electrical output of RTD and thermocouple tem perature sensors . Sourcing Elect rical Parameters Volts or ohms are sourced and s hown in the lo[...]

Temperature Calibrator Using Source M ode 27 Simulating Thermoc ouples Connect the calibrator TC input/output to the instrument under test with thermoc ouple wire and the appropriate thermocouple m ini-connector (polariz ed thermocouple plug with flat, in-line blades spac ed 7.9 mm [0.312 in] center to center). Note One pin is wider than the other.[...]

724 Users M anual 28 TEST DC PWR + + – – + Color depends on type of TC TC RTD 100% 25% 25% RECALL MEAS SOURCE STORE SETUP 0% TEMPERATURE CALIBRATOR 724 TC TC Miniplug V LOO P mA V ˚ F ˚ C zi10f.eps Figure 13. Connections for Simulating a Thermocouple[...]

Temperature Calibrator Using Source M ode 29 TC RTD 100% 25% 25% RECALL MEAS SOURCE STORE SETUP 0% TEMPERATURE CALIBRATOR 724 BLACK SENSOR TERMINALS BLACK RED 1 2 3 4 V V ˚ F ˚ C LOOP mA zi11f.eps Figure 14. Connections for Simulating 3-Wire RTD[...]

724 Users M anual 30 Setting 0 % and 100 % Output Parameters For output parameters (v olts, ohms , TC potentials or RTD resistanc es), you m ust set the 0 % and 100 % points before you can us e the step and ramp func tions. Proceed as follows: 1. If necess ary, press M for SO URCE mode. 2. Select the TC sourc e function and use the arrow keys to en[...]

Temperature Calibrator Storing and Recalling Setups 31 Auto Ramping the Output Auto ramping gives you the ability to c ontinuously apply a varying s timulus from the calibrator to a transm itter, while your hands rem ain free to test the respons e of the transmitter. When you press L , the calibrator produces a continuously repeating 0 % - 100 % - [...]

724 Users M anual 32 Calibrating a Transmitter Use the meas urement (upper display ) and sourc e (lower display) m odes to calibrate a trans mitter. The following example s hows how to c alibrate a temperature transmitter. Connect the calibrator to the ins trument under test as shown in Figure 15. Proceed as follows to c alibrate a transmitter: 1. [...]

Temperature Calibrator Calibrating a Transmitter 33 Red TEST DC PWR + – + – – + Black TC RTD 100% 25% 25% RECALL MEAS SOURCE STORE SETUP 0% TEMPERATURE CALIBRATOR 724 V LOO P mA V ˚ F ˚ C zi12f.eps Figure 15. Calibrating a Thermocouple Transmitter[...]

724 Users M anual 34 Testing an Output Device Use the sourc e functions to tes t and calibrate actuators , recording, and indicating dev ices. Proc eed as follows : 1. Connect the test leads to the instrument under tes t as shown in Figure 16. 2. Press l for dc voltage, or U for resis tance (lower display). 3. If necess ary, press M for SO URCE mod[...]

Temperature Calibrator Replacing the Batteries 35 Replacing the Batt eries W Warning To avoid false readings, which could lead to possible electric shock or personal injury, replace the batteries as soon as the battery indicator ( M ) appears. Figure 17 shows y ou how to replace the batteries . Replacing the Fuse The calibrator comes equipped with [...]

724 Users M anual 36 Battery and Compartment Fuse Compartment sh38f.eps Figure 17. Replacing the Batteries Maintenanc e Cleaning the Calib rator W Warning To avoid personal injury or damage to the calibrator, use only the specified replacement parts and do not allow water into the case. Caution To avoid damaging the plastic lens and case, do not us[...]

Temperature Calibrator Maintenance 37 postage paid and insured, to the neares t Service Center. Fluke ass umes no res ponsibility for dam age in transit. The Fluke 724 Temperature Calibrator c overed by the warranty will be prom ptly repaired or replaced (at Fluk e ’ s option) and returned to you at no charge. See the warranty at the beginning of[...]

724 Users M anual 38 1 8 6 6 21 9 19 10 12 13 2 18 20 17 3 4 5 3 7 16 11 14 15 22 23 zi46f.eps Figure 18. Replacement Parts[...]

Temperature Calibrator Specifications 39 Specifications Specifications are based on a one year c alibration cycle and apply from +18 ° C to +28 ° C unles s stated otherw ise. All specific ations ass ume a 5 minute warm up period. DC Voltage Measuremen t Range Resolution Accuracy, (% of Reading + Counts) 30 V (upper disp lay) 0.001 V 0.02 % + 2 20[...]

724 Users M anual 40 Ohms Measurement Accuracy ± Ω Ohms Range 4-Wire 2- and 3-Wire* 0 to 400 Ω 0.1 0.15 400 to 1.5 k Ω 0.5 1.0 1.5 to 3.2 k Ω 11 . 5 Excitation Current: 0.2 mA Maximum input voltage: 30 V Temperature coefficient -10 ° C to 18 ° C, +28 ° C to 55 ° C: ± 0.005 % of range per ° C * 2-wire: Does not inc lude lead resistanc[...]

Temperature Calibrator Specifications 41 Millivolt Measurement and Source* Range Resolution Accuracy -10 mV to 75 mV 0.01 m V ± (0.025 % + 1 count) Maximum input voltage: 30 V Temperature coefficient -10 ° C to 18 ° C, +28 ° C to 55 ° C: ± 0.005 % of range per ° C *Select this function by pres sing T . The signal is available at the thermoc [...]

724 Users M anual 42 Temperature, RTD Rang es, and Accuracies (ITS-90) Accuracy Type Range ° C Measure 4-Wire ° C Measure 2- and 3-Wire* ° C Source ° C Ni120 -80 to 260 0.2 0.3 0.2 Pt100-385 - 200 to 800 0.33 0.5 0.33 Pt100-392 -200 to 630 0.3 0.5 0.3 Pt100-JIS -200 to 630 0.3 0.5 0.3 Pt200-385 -200 to 250 250 to 630 0.2 0.8 0.3 1.6 0.2 0.8 Pt5[...]

Temperature Calibrator Specifications 43 Loop Power S upply Voltage: 24 V Maximu m curre nt: 2 2 mA Short circuit protected General Specifi cations Operating temperature -10 ° C to 55 ° C Storage temperature - 20 ° C to 71 ° C Operating altitude 3000 meters abov e mean sea lev el Relative Hum idity (% RH operating without c ondensation) 90 % (1[...]

724 Users M anual 44[...]

45 Index —0— 0% output parameter, setting, 30 —1— 100% output parameter, setting, 30 —A— Auto ramping output, 31 —B— Batteries, replacing, 35 —C— Calibration, 36 Cleaning calibrator, 36 —D— Displ a y, 13 —E— Electrical param eters measurem ent, 19 sourcing, 26 —G— Getting started, 14 —I— Input terminals, 8 Input/[...]

724 Users M anual 46 —O— Output device, tes ting, 34 Output terminals, 8 —P— Parts list, 37 —R— Recalling setups , 31 Repair, 36 RTD simulating, 27 RTD measuring, 23 types, 23 —S— Safety information, 3 Servicing, 36 Setup recalling, 31 storing, 31 Thermocouple, 27 Simulating RTD, 27 thermocouples , 27 Source functions, s ummary (tab[...]