Varec Network Adapter 4000 manuale d’uso

Varec, Inc. 5834 Peachtree Corners East, Norcross (Atlant a), GA 30092 USA Tel: +1 (770) 447 -9202 Fax: +1 ( 770) 662-8939 www.varec.com IOM003GVAE0809 4000 T ank Gauge T r ansmitter Advanced Technology Transmitter for transmission of level and temperature data from the tank side to inventory management systems Installa tion and Oper a tions Manual[...]

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i 4000 Copyright All rights reserve d. Printed in the United States of America. Except as permitted und er the United States Copyright Act of 1976, no part of this publication may be r eproduced, stored in a re trieval system or tran smitted in any form or by any means - electronic, mechanical, photocopying, recording, or otherwise - without the pr[...]

Advanced Technology Transmitter ii Installation and Operations Manual Disclaimer of W a rranties The contract between the Seller and the Buyer states the entire obligation of the Seller. The contents of this instruction manual shall not become part of or modify any prior or existing agreement, commitmen t, or relationship between the Sel ler and Bu[...]

iii 4000 Safety Precaution Definitions Caution! Damage to equipment may result if this precaution is disregarded. Warning! Direct injury to p ersonnel or damage to equipment which can cause injury to personnel may result if this precaution is not follow ed. Safety Precautions Read this manual carefully and make sure yo u understand its contents bef[...]

Advanced Technology Transmitter iv Installation and Operations Manual[...]

v 4000 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1 Using This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 1.2 Getting Acquainted with the Advanced Technolog y Transmitter (ATT) . . . . .1 1.3 Operation . . . . . . . . . . .[...]

Tank Gauge Transmitter vi Installation and Operations Manual 3.5.5 Imperial Fractional 1800 Series Transmitter Quick Setup . . . . . . . . . . . . . 24 3.5.6 Imperial Decimal 1800 Serie s Transmitter Quick Setup . . . . . . . . . . . . . . . 24 3.5.7 0-20 Meters 1800 Series Transmitter Quick Setup . . . . . . . . . . . . . . . . . . 24 3.5.8 0-30 M[...]

vii 4000 7.9 Host Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41 7.10 Mark/Spa ce Host Interf ace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42 7.11 Modbus Su pport over Mark/S pace Host Inte rface . . . . . . . . . . . . . . . . . . . .43 7.12 Compatibility with [...]

Tank Gauge Transmitter viii Installation and Operations Manual 10.2 4000GEFMO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 10.3 4000LJFMO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 10.4 4000MXFMO . . . . . . . . . . . . . . . . . . . . . [...]

1 4000 Introduction 1 Intro duction 1.1 Using T his Manual This manual is designed to assist the user wi th the installation, configuration, operation, maintenance, and troubleshooting of the Varec Model 4000 Advanced Technology Transmitter (ATT). 1.2 Getting Acquainted with the Advanced T echnology Transmitter (A TT) The Varec Model 4000 Advanced [...]

Introduction Tank Gauge Transmitter 2 Installation and Operations Manual 1.3 Ope ration The ATT uses an incremental counting technique for determining liqu id level. An initial level is identified as part of the calibration procedure. Changes to that level are determined through increm ental increases or decreases de tected by the ATT. The host com[...]

3 4000 Installation 2 Installation 2.1 Over view This section contains instructions for unpac king, mounting, ground ing, and wi ring the Varec Model 4000 Advanced Te chnology Transmitter (ATT) assembly . An installation checklist is also included . Wa rn i n g ! T o avoid electric shock and possibl e injury , do not perform any service procedures [...]

Installation Tank Gauge Transmitter 4 Installation and Operations Manual 2.2 Mounting the Equipment The ATT is bolted to the Model 2500 Automa tic T ank Gauge head as illustrated in Fi gur e 2 -2. It m ay a lso be m oun ted to E ndr ess +Ha use r, S aku ra, Tok yo -Ke iso, Sha nd & Jurs, and Gauging Systems, Inc. float and ta pe gauges with the[...]

5 4000 Installation 2.3 Grounding the Equipment Wa rn i n g ! The A TT mu st be grounded before communication and power conn ections are made. An external grounding lug is provided on th e ATT. A connection from the ground lug to earth ground must be made before an y other wiring connections are made. Note! For adequate/proper operation of the A TT[...]

Installation Tank Gauge Transmitter 6 Installation and Operations Manual Figure 2-3: ATT Field Terminal Block Wiring 2.4.4 Connecting Ho st Communication The procedur e used to wire the ATT to the host computer de pends on the type of host interface option ordered with the ATT. Terminal Block One TB1 Terminal Block Two TB2 1 L+ = ATTI expansion Bus[...]

7 4000 Installation 2.4.5 A TT EIA485 Wiring The ATT uses a 2-wire EIA485 hard ware interface to communicate with the Modbus master. EIA485 is a high speed differential communications network which allows up to 32 devices to operate on one network. The ATT and Modbus master share a twisted pair of wires to communicate. F igure 2-4 illustrates the t[...]

Installation Tank Gauge Transmitter 8 Installation and Operations Manual Figure 2-5: Typical EIA485 System Wiring 110/220 VAC 50/60 Hz. Model 8130 with optional 48 VDC power supply. Field Junction Box Field Junction Box Host Computer Interface MODBUS interface is certified by Honeywell Office Printer RS232 To FuelsManager or other MODBUS master Are[...]

9 4000 Installation 2.4.6 A TT Mark/Sp ace Wiring For an ATT using the Mark/Space field comm unications option, the following additional wiring connections must be ma de. (Refer to Input Power Wiring in Section 6 to determine the minimum wire size required.). See Figure 2-6. • Run two twisted pairs of 18 AWG wire (Mar k/Space wires) into the ATT [...]

Installation Tank Gauge Transmitter 10 Installation and Operations Manual 2.5 Connecting the RTD The follo wing list sho ws how the ATT is wi re d to an RTD device. The ATT’s temperature circuit is designed to work with a platinum or copper 3-wire RTD. 2.5.1 Connecting the Handheld T erminal Figure 2-3 on page 6 shows how the 1200 Hand Held Termi[...]

11 4000 Configuration 3 Configur a tion The Varec Model 4000 Advanced Technology Tr ansmitter (ATT) must be configured for the specific tank, attached sens ors, and host interface. Thi s section provides detailed information on ATT configuration. The ATT can be configured with a 1200 Hand Held Terminal or from a host program such as Varec TankView.[...]

Configuration Tank Gauge Transmitter 12 Installation and Operations Manual Table 3-1: Model 1200 Function Keys Alpha and numer ic information is entered fr om the keypad direct ly. Numeric data is entered using a sing le keystroke, while al pha information is entered with a two-key combination. The two-key combi nation for alpha data consists of a [...]

13 4000 Configuration Figure 3-2: ATT Display Mode Me nu Tree Figure 3-3: 1200 Hand Held Terminal 3.3 T er minal Mode Oper a tion The 1200 Hand Held Terminal is us ed to scroll through the various ATT menus . Basic scroll and selection operations are performe d using the four function keys (F1 through F4) immediately below the display. Line 1 of th[...]

Configuration Tank Gauge Transmitter 14 Installation and Operations Manual 3.4 Menu Operation For example, when the Main Menu is displayed on the top l ine, pressing F1 (Up) will scroll up through the possible main menu selections while pr es sing F2 (Down) will scroll down through the possible main menu selections. Pressing F4 (Enter) will caus e [...]

15 4000 Configuration 3.4.1 Main Menu Main Menu Description Quick Setup 2 I nitializes the ATT co nfiguration parame ters to a variety of preset configurations. Eng Frac 1900, Eng Dec 1900, 0-30 m 1900, 0-20m 1900, Eng F rac 1800, Eng Dec 1800, 0-30 m 1800, 0-20m 1800, Im perial Mo dbus, or Metric Modbus are valid. Use F1/F2 keys to select. See sec[...]

Configuration Tank Gauge Transmitter 16 Installation and Operations Manual 3.4.2 Summary Menu Summary Menu Description Level Current level. Temperature Current temperature RTD Resistance RTD resistance measur ed Cfg Error Type Configuration erro r type detected. Power Log Number of times unit has gone through a power down cycl e since it was la st [...]

17 4000 Configuration 3.4.3 Configuration Menu Configuration Menu Description Level Units Level units used for disp lay and Modbus data. FT-IN-16TH, M, or FT are valid. Use F1/F2 to select. Temp Units Temperature units used for display and Modb us data. F, C, or K are valid. Use F1/F2 to select. Level Sensor Direction of gauge. Forward/Reverse Cali[...]

Configuration Tank Gauge Transmitter 18 Installation and Operations Manual 3.4.4 Ho st Menu 3.4.5 Notes on Menu Ite ms 1 Only displayed if in Display Mode 2 Only displayed if in Alter Mode 3 Only displayed if TRUE Host Me nu Description Type Type of host communication interface. Modbus or Mark/Spa ce. Use F1/F2 to select. Mark/Space Adr 4 Address o[...]

19 4000 Configuration 4 Only displayed if host in terface type is Mark/Space 5 Only displayed if host interface type is Modbus 6 Only displayed if host interface type is Modbus or Mark/Space 7 Only displayed if there is no temperature sensor 3.5 Quick Setup The Quick Setup option is meant to get th e ATT configured quickly and with some defaults. I[...]

Configuration Tank Gauge Transmitter 20 Installation and Operations Manual 3.5.1 Imperia l Fractional 190 0 Quick Setup Defa ult s General Configuration Level Units FT-IN-16th Temp Units F Level Sensor Forward Damping 0 Temp Sensor Copper RTD Manual Temperature Critical High Level 80-0-0 Advisory High Level 80-0-0 Advisory Low Level 0 Critical Low [...]

21 4000 Configuration 3.5.2 Imperial Decimal 1900 Quick Setup De fault s General Configuration Level Units FT-IN-16th Temp Units F Level Sensor Forward Dampin g 0 Temp Sensor Copper RTD Manual Temperature Critical High Level 80.00 Advisory High Level 80.00 Advisory Low Level 0 Critical Low Level 0 Level Deadband 0.83 Critical High Temp 500 Advisory[...]

Configuration Tank Gauge Transmitter 22 Installation and Operations Manual 3.5.3 0-20 Meter 1900 Quick Setup Default s General Configuration Level Units Meters Temp Units C Level Sensor Forward Damping 0 Temp Sensor Platinum RTD Manual Temperature 0.0 Critical High Level 20.0 Advisory High Level 20.0 Advisory Low Level 0 Critical Low Level 0 Level [...]

23 4000 Configuration 3.5.4 0-30 Meter 1900 Qu ick Setup Default s General Configuration Level Units Meters Temp Units C Level Sensor Forward Dampin g 0 Temp Sensor Platinum RTD Manual Temperature 0.0 Critical High Level 30.0 Advisory High Level 30.0 Advisory Low Level 0 Critical Low Level 0 Level Deadband 0.03 Critical High Temp 250.0 Advisory Hig[...]

Configuration Tank Gauge Transmitter 24 Installation and Operations Manual 3.5.5 Imperial Fr actional 1800 Series T ransmitter Quick Setup The Imperial fractional 1800 quick setup se lection establishes the same default parameters as the Imperial Fractional 1900 quick setup with the exception that the sensor to emulate parameter is the 1800 MWT. 3.[...]

25 4000 Configuration 3.5.9 Imperial Modbus Quick Set up Default s General Configuration Level Units FT-IN-16th Temp Units F Level Sensor Forward Dampin g 0 Temp Sensor Copper RTD Manual Temperature Critical High Level 80-0-0 Advisory High Level 80-0-0 Advisory Low Level 0 Critical Low Level 0 Level Deadband 0-1-0 Critical High Temp 500 Advisory Hi[...]

Configuration Tank Gauge Transmitter 26 Installation and Operations Manual 3.5.10 Metric Modbus Quick Setup Def ault s General Configuration Level Units Meters Temp Units C Level Sensor Forward Damping 0 Temp Sensor Platinum RTD Manual Temperature 0.0 Critical High Level 20.0 Advisory High Level 20.0 Advisory Low Level 0 Critical Low Level 0 Level [...]

27 4000 Maintenance and Troubleshooting 4 Maintenance and T r oubleshooting 4.1 Maintenance The Varec Model 4000 Advanced Technology Transmitter (ATT) is d esigned and manufactured to provide accurate and reliab le operation without a requirement for regularly scheduled maintenance. Due to the modular construction of the ATT, necessary repairs can [...]

Maintenance and Troubleshooting Tank Gauge Transmitter 28 Installation and Operations Manual 4.3 T ro ubleshooting The ATT has provisions for hardware alarm in puts , software generated setpoint alar ms, and other alarm conditions. Alarm and error status conditions are available to the Model 1200, to the host Computer, and to the optional ATT displ[...]

29 4000 Maintenance and Troubleshooting 4.4 A TT Status Conditions The ATT provides the following g eneral status condition. 4.5 A TT Configur ation Er ror Checking The ATT performs extensive inte grity checking on the configuration data before it uses it for calculations. If a configuration error is detected, the ATT will generate a CONFIG ERROR s[...]

Maintenance and Troubleshooting Tank Gauge Transmitter 30 Installation and Operations Manual 4.6 Model 1200 Er r or Messages The following err or messages can be enc ountered while using the Model 1200. 4.7 Host Communication Loopbac k T ests Communications betwee n a host computer and several field devices, such as the ATT, usually occurs on a sin[...]

31 4000 Specifications 5 Specifica tions 5.1 Specifications and Physical Characteristics The following specifications apply to the Varec Model 4000 Advanced Technolog y Transmitter assembly over the operating temperature range. 5.1.1 Environment al 5.1.2 Physical 5.1.3 Input Power Item Specification Temperature -4 0 o C to +85 o C (operating) Humid[...]

Specifications Tank Gauge Transmitter 32 Installation and Operations Manual 5.1.4 Level Measurement Item Description Resolution 0.0 4 in (1.0 mm) Counter Level Range +/-128 ft (39 M) Count Verification Check Disk Level Data Type Absolute with Calibrated Level Calibration Level Software Configur ed Units of Measure Software Configured Direction of R[...]

33 4000 Specifications 5.2 Safety Agenc y Appr o vals 5.2.1 Explosion Proof The HART Level Encoder is ETL listed to the following standards for explosi on proof installations: 5.2.2 Intrinsic Safety The ATT is not an intrinsically safe device and must not be opened or wired while power is applied. Agency Acronym Agency Requirement (FM) Factory Manu[...]

Specifications Tank Gauge Transmitter 34 Installation and Operations Manual 5.3 Major System Assemblies and Components The major assemblies and components for the Model 4000 are identifie d in Table 5-1 and Table 5 -2 and illustrate d in Figure 5-1 . Figure 5-1: ATT Major Assemblies 4 1 3 11 2 6 - 12 12 5[...]

35 4000 Specifications Table 5-1: Assembly/Component List Table 5-2: Transmitter Adapter Kits List Note! Items not listed here require fa ctory servic ing due to th e critical alignments required when replacing spare parts — please consult the Factory . Item Assembly/Component Part Numb er 1 Sensor Assembly 08-09220 2 CPU Board Assembly with EPRO[...]

Specifications Tank Gauge Transmitter 36 Installation and Operations Manual[...]

37 4000 Ordering Information 6 Or dering Infor mation 6.1 Or der Code s 10 Communications GE GPE Loop Communication MX Mark S pace Matrix (1600/1700) TI TIW A Y Communication WB Whessoe Bus/GPE Curren t Loo p (1315) M4 Mark/S pace 48 MODBUS GM GSI T ype MODBUS 20 Approvals CS Explosion Proof - Class I, Groups C & D (ETL tested to CSA st andards[...]

Ordering Information Tank Gauge Transmitter 38 Installation and Operations Manual[...]

39 4000 Theory of Operation 7 T heor y of Oper a t ion 7.1 Over view The Advanced Technology Transmitter (ATT) represents a flexible system for use in liquid level measureme nt and/or other measurement applications. The Advanced Technology Transmitter (ATT) collects measurement information from compatible device s and transmits this in formation ov[...]

Theory of Operation Tank Gauge Transmitter 40 Installation and Operations Manual 7.3 Status Inputs and Outputs Status inputs and outputs are accomplished via a separate I/O Module. The ATT will communicate with the Module via the ATTI po rt. The state of the inputs will be mapped into Modbus registers to allow a host comput er to read them. Control[...]

41 4000 Theory of Operation 7.6.2 Damping The ATT implements a damping scheme to stabilize the level and temperature in turbulent tanks. The amount of damping is specifie d by a damping value in the 'DAMPING' parameter under th e Config Menu. This parameter can be entered via the Model 1200 using the Alter menu. A damping va lue of 0 to 1[...]

Theory of Operation Tank Gauge Transmitter 42 Installation and Operations Manual The supported Modbus functi ons and exceptions are indicated in the following tables. Table 7-1: Modbus Functions Table 7-2: Modbus Exception Responses 7.10 Mar k/Space Host Interface The Mark/Space interface provides compat ibility with existing Mark/Space data highwa[...]

43 4000 Theory of Operation When emulating an 1800 or 1900, battery low st atus can be reported as one of the dry- contact inputs or as an i nvalid le vel. Note! The A TT will accept but ignore the Raise/Lower Displacer commands. 7.11 Modbus Suppor t o v er Mar k/Space Host Interface The ATT permits Modbus communications ov er the Mark/Space data h[...]

Theory of Operation Tank Gauge Transmitter 44 Installation and Operations Manual[...]

45 4000 ATT Family of Products 8 A TT F a mily of Pr oducts The ATT product family consists of the 400 0 ATT, the Model 4040 Display Unit, and the Model 4050 Digital Input/Output Unit. Figure 8-1: AT T Family of Products 8.1 Model 4040 Display Unit The Model 4040 is a two line LCD display unit with 16 characters per line. It operates connected to a[...]

ATT Family of Products Tank Gauge Transmitter 46 Installation and Operations Manual 8.2 Model 4050 Digital Input/Output Unit The Model 4050 is a digital I/O unit. It includ es four digital contact closure outputs and four digital inputs. It operates connected to and is powered from the ATTI bus. The unit is mounted in a round explosion proof juncti[...]

47 4000 Modbus Implementation 9 Modbus Im plem enta tion 9.1 Introductio n This protocol guide explains the operation of the Modbus protocol as described in the following Modicon document: PI-MBUS-300 Rev B (1985) implemented in the Varec Model 4000 Advanced Technology Transmitter (ATT ). 9.2 Implementation The implementation of the Modbus protocol[...]

Modbus Implementation Tank Gauge Transmitter 48 Installation and Operations Manual Table 9-1: Modbus Functions Note! Exception: Because the A TT does not dist inguish between inputs and outputs, func- tion codes 01 and 02 as they apply to bits, and function codes 03 and 04 as they apply to numeric valu es re fe r to th e sam e data re giste rs. For[...]

49 4000 Modbus Implementation 9.4 Functions and Data F or mats The Modbus data in the ATT is arranged in in teger registers, floati ng point r egisters, and status bits. The assignments for these registers are found at th e end of this appendix. Function codes 03, 04, 06, and 16 are us ed with integer registe rs. Because of the multiple Modb us hos[...]

Modbus Implementation Tank Gauge Transmitter 50 Installation and Operations Manual Note! In all of the foll owing communication examples, the error check valu e is dependent upon the mode of transmission. 9.5.1 Integ er Dat a The integer data is a whole number be tween 0 and the maximum Modbus integer (inclusive). The maximum Modbus integer is a us[...]

51 4000 Modbus Implementation 9.5.2 Integer Dat a • Hexade cimal representation • 4124Decimal equivalent: 16,676 The data returned for data address 56 is 16, 676 (4124 Hex). This value must be scaled using the following formula to give it meaning. If a variable goes out-of-bounds (outside the minimum or maximum scale points), a value equal to t[...]

Modbus Implementation Tank Gauge Transmitter 52 Installation and Operations Manual 9.5.4 Coded Da t a Coded da ta represents a tabl e look-up value. Data written to these registers must be a valid table entry. Inval id data may cause a Configuration Error to occur. The following example shows coded data at data address 20 (0014 Hex) representing le[...]

53 4000 Modbus Implementation 9.6 Floating-P oint Re gisters Although not part of the Modbus protocol sp ecification, floating point numbers have been implemented usi ng the IEEE 754 standard. Floating p oint numbers reduce the complexity required in scaling integ er values and provide a means to transmit numbers used by the ATT that are not easily[...]

Modbus Implementation Tank Gauge Transmitter 54 Installation and Operations Manual 9.6.4 The One 32-bit Reg ister Format Function code 65 (41 Hex) is used to read floating-point register s in this format. An example of a floating-point re gister read is shown below with the a temperature of 100.0 degrees is be ing read from reg ister 1 (0001 Hex). [...]

55 4000 Modbus Implementation 9.7 Status Bits In the ATT implementation, status bits contain alarms, commands, and s tatus information. The state of a Modbus status bit is defined as eithe r ON (true) or OFF (false). The ON state is repres ented by a "1". The status bits may be read with function code 1 or 2. They may be written one at a [...]

Modbus Implementation Tank Gauge Transmitter 56 Installation and Operations Manual 9.9 Data Out of Range When integer data calculated by the ATT is outside the minimum or maximum scale points or is otherwise out of range, the va lue returned is that of the maximum Modbus integer + 1. For example, if the maximum Modbus integer is 65,534 (as used in [...]

57 4000 Modbus Implementation Termination resistors of 120 Ohms are shown at each end of the communic ation bus to minimize reflections on the line. Terminatio n resistors may not be necessar y at baud rates of 9600 bits per second or slower. Pull-up and pull-down resistors are also s hown at the Modbus master end of the cable. These resistors mini[...]

Modbus Implementation Tank Gauge Transmitter 58 Installation and Operations Manual 7 Bit Fiel d CmdsBit Usage 0 CANCEL ALT 1 CLR LOCAL MODS 2 RESTART 3 SAVE TO EE 4 RESERVED 5 CALIB LEVEL 6 ENC BATT OFF 7 QUICK SETUP 8.15 RESERVED 8 Reserved 9 Code A /D Noise Reject: Type 0 - 60Hz 1 - 50 Hz 10 Scaled Crit Low Level Setpoint 11 Scaled Adv Low Le vel[...]

59 4000 Modbus Implementation 28 Code Quick Setup Option 0 - NONE 1 - ENG FRAC 1800 2 - ENG DEC 1800 3 - 0 TO 20 M 1800 4 - 0 TO 30M 1800 5 - ENG FRAC 1900 6 - ENG DEC 1900 7 - 0 TO 20 M 1900 8 - 0 TO 30M 1900 9 - METRIC Modbus 10 - IMPERIAL Modbus 29 Reserved 30 ASCII Sw Ver[0-1] AT 31 ASCII Sw Ver[2-3] T- 32 ASCII Sw Ver[4-5] 33 ASCII Sw Ver[6-7][...]

Modbus Implementation Tank Gauge Transmitter 60 Installation and Operations Manual 210 Bit Fiel d AlmStat 211 Bit Field DiagStat 212 Reserved Reserved 213 Reserved 214 Reserved 215 Code Level Units 216 Code Temp Units 217 Reserved Reserved 218 Reserved 219 Reserved 220 Code Level Type 221 Code Temp Type 222 Reserved Reserved 223 Reserved 224 Reserv[...]

61 4000 Modbus Implementation 9.13 Floating P oint Register Map 9.14 Sta tus Bit Register Map Register Number Description 01 23 45 67 89 10 11 12 13 14 15 16 17 18 19 20 21 Level Temp RTD Resist Reserved Reserved Crit Low Level Adv Low Level Adv High Level Crit High Level Level Deadband Crit Low Temp Adv Low Temp Adv High Temp Crit High Level Temp [...]

Modbus Implementation Tank Gauge Transmitter 62 Installation and Operations Manual[...]

63 4000 Optional Interfaces 10 Optional Interfaces The intent of the optional inte rfaces is to enable the ATT to co-exist along side older VAREC style and competitor gauging systems and transmitters. This al lows the user upward migration to modern gaug ing systems such as the RS-485 signal inter face utilizing the MODBUS register set protocol. Wh[...]

Optional Interfaces Tank Gauge Transmitter 64 Installation and Operations Manual 10.5 4000WBFMO This option can co-exist al ong side Whessoe Bus™ transmitters, the signal format is a current loop style tr ansmission signal. The transmitte r address is user-selectable between 1 and 127 with basic baud rates, stop, and parity bits. The protocol is [...]

65 4000 Glossar y Adv Hi Level Advisory High Level alarm set point. Whe n the product level e xceeds this point an advisory alarm will be generated. Adv Hi Temp Advisory High Temper ature alarm set point. When the product temp erature excee ds this point an advisory alarm will be generated. Adv Lo Level Advisory Low Le vel alarm set point. When the[...]

Tank Gauge Transmitter 66 Installation and Operations Manual o C Celsius. A unit of measure for temperature readings. 0 o C is the freezing point for water, 100 o C is the boiling point of water. DBAND Deadband. ft-in-16 Feet-inches-1/16 of an inch. Im perial fractional measurement. o F Fahrenheit. A unit of measure for temperature readings. 0 o C [...]

67 4000 Temp Dband Temperature Deadband. The band that a temp erature alarm must clear before the alarm is reset. Temp Temperature. TSU Tank Polling Unit. A Varec interface unit that allows a host computer to interface to Varec Mark/Space, Remote Selector, IFU, and Matrix field interfaces.[...]

Tank Gauge Transmitter 68 Installation and Operations Manual[...]

69 4000 NOTES[...]

Your offical representative Varec, Inc. 5834 Peachtree Corners East, Norcross (Atlant a), GA 30092 USA Tel: +1 (770) 447-9202 Fax: +1 (770) 662-8939 © 2004 Varec, Inc. All Rights Reserved. This document is for in formation purposes on ly. Varec, Inc. ma kes no warranti es, expres s or implied, in this summary. The names of ac tual companie s and p[...]