Varec 2500 Automatic Tank Gauge Service Manual
Contents
1. SPAN ESS VR RS RZ C4 Ui RERI7Z RIS ZERO EET vezti 2 Oo Le A o E m 7 Oom T Oe a E Field Wiring Ho PS L2 E Ao mal m L4 rad Le LO Hacc qu PORNO NI D 20 vee y c OU DOC gt Z EU ao ales E ME d A E G c C3 ASSY 08 06886 1 REV N 20 F1 AO AC Electrical Connections 110 220 VAC input voltage jumpers Setting for 110 VAC shown Figure 2 4 AC Supply Jumper Setting 8 Installation and Operations Manual Current Output Transmitter Check that the 4 20 10 50 jumper is set for the current output range of the instrument load loop that is to be used Current output range jumper settings DC Version 08 06886 2 setting for 4 20 mA range shown S Z 3 z v Field Wiring 2 L2 T TU L4 E O Q 000000 y ASSY 08 06886 2 REV No parts installed in this area Figure 2 5 Current Output Jumper Setting Varec Inc 9 Installation 2 7 AC Electrical Connections Connect 110 VAC or 220 240 VA2. Disclaimer of Warranties 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 commitment or relationship between the Seller and Buyer There are no express or implied warranties set out in this instruction manual The only warranties that apply are those in the existing contract between the Seller and Buyer The 8200 Current Output Transmitter COT has not been tested by Varec under all possible operational conditions and Varec may not have all the data relative to your application The information in this instruction manual is not all inclusive and does not and cannot take into account all unique situations Consequently the user should review this product literature in view of his or her application If you have any further questions please contact Varec for assistance Limitations of Seller s Liability In the event that a court holds that this instruction manual created some new warranties Seller s liability shall be limited to repair or replacement under the standard warranty clause In no case shall the Seller s liability exceed that stated as Limitations of Remedy in the contract between the Seller and Buyer Use of parts that are not manufactured or supplied by Varec voids any warranty and relieves Varec of any obligation to service the product under warranty Varec recommends the use o
3. Operations Manual Current Output Transmitter 3 3 Limit Switch Operational Setup Warning Do not apply power to the transmitter until all connections have been made and the cover of the transmitter has been replaced The limit switches normally are configured in arrays of 2 or 4 switches To set these switches proceed as follows 1 Remove power or obtain a hot work permit before removing the transmitter cover 2 Determine which switch sets which specific limit to be selected High Low etc 3 Usethe indicator dial as a reference Align the lobe on the cam to the selected limit Spring washers are used to keep the cams from moving Note If there are two scales on the dial pointer it is painted the color of the scale used If the dial pointer is red use red numbers and if the pointer is black use the black numbers 4 After calibration and alignment of the cam loosen the slotted drive coupling set screw using an Allen wrench Set the transmitter to the actual liquid level in the tank by rotating the field adjust knob located at the end of the shaft 5 Tighten the Allen screw on the drive shaft coupling and install the explosion proof cover Varec Inc 19 Configuration 20 Installation and Operations Manual Current Output Transmitter 4 Maintenance Maintenance of the 8200 COT consists of routine regular inspections under normal operating conditions The user should make sure that the shaft connecting the
4. 26 and 2036 gauges Table 4 1 Major System Components 22 Installation and Operations Manual Current Output Transmitter Figure 4 1 Major System Assemblies Varec Inc 23 Maintenance 24 Installation and Operations Manual Current Output Transmitter 5 Specifications 5 1 General Item Specification Accuracy 0 25 Full Range Repeatability 0 16 Full Range Output Current Loop 4 20 mA or 10 50 mA jumper selectable Range Adjustment 45 100 Dimensions 8 0 Dx 13 25 L 203 2mm x 336 55mm Weight 16 Ibs 7 3 kg Enclosure Material Impregnated Aluminum Base and Cover NEMA 4 IP66 Electrical Requirements Operating voltage range 15 to 48 Volts DC regulated from external power supply OR 115 VAC 10 50 60 Hz or 220 240 VAC 10 50 60 Hz Table 5 1 General 5 2 Available Level Ranges Item Specification Feet 0 12 5 0 25 0 0 50 0 0 100 0 Meters 0 3 75m 0 7 5m 0 15 0m 0 24 0m Table 5 2 Available Level Ranges Varec Inc 25 Specifications 5 3 Environmental Item Specification Temperature 13 F to 185 F 25 C to 85 C Humidity 0 to 95 relative humidity non condensing Safety Approvals Factory Mutual cFMus Explosion Proof Class Division 1 Groups C amp D T5 Ta 85 C Enc
5. B T5 Ta 85 C 3 IECEx Flameproof Ex d IIB T5 Ta 85 C General Options O Additional Option Not used 1 2 SPDT Switches Normally Open 2 4SPDT Switches Normally Open 3 Reverse Reading 4 Reverse Reading with 2 SPDT Switches Normally Open 5 Reverse Reading with 4 SPDT Switches Normally Open Junction Box O None 1 Included N8200 Complete product designation Varec Inc 27 Order Codes 28 Installation and Operations Manual Current Output Transmitter 7 Identification 7 1 Device Designation 7 1 1 Warning The following warning is posted on the instrument WARNING DO NOT OPEN WHEN ENERGIZED OR WHEN AN EXPLOSIVE GAS ATMOSPHERE IS PRESENT Conduit seal required within 50mm at conduit entries to enclosure when installed ATTENTION NE PAS OUVRIR SOUS TENSION OUSIUNE ATMOSPH RE EXPLOSIVE GAZEUSE PEUT TRE PR SENTE Joint de conduit requis moins de 50mm aux MADE IN USA entr es de conduit la cl ture une fois install Exq6 013116 REV B Varec Inc 5834 Peachtree Corners East Norcross Atlanta Georgia 30092 USA Figure 7 1 8200 COT Warning 7 1 2 Nameplate The following technical data are given on the instrument nameplate O e 8200 Series Liquid Level Transmitter O qu Model No Serial No Mfg Date 0 48 V 50mA 120V 30mA 50 60 Hz 220 240V 15mA 50 60 Hz t us EXPLOSIONPROOF C
6. C 50 60 Hz at TB3 terminals N H and Ground The wire color code shown is NEC color coding in the U S A and will vary in other countries Please reference the local electrical code Black H Hot White N Neutral Green Ground 2 8 Signal and Switch Wiring Color Codes The wiring color coding is standard regardless of the model option Red L2 Gray L4 Green Signal reference ground White Limit switch common Orange Switch 1 N O Violet Switch 2 N O Yellow Switch 3 N O Blue Switch 4 N O 10 Installation and Operations Manual Current Output Transmitter 2 9 Junction Boxes and Limit Switches The 8200 COT is shown with optional junction box es in Figure 2 6 See Figures 2 7 and Figure 2 8 on page 13 and the accompanying tables for details regarding junction box connections The 8200 COT offers two or four limit switches as options The wiring is Normally Open N O The switch has connections for N O and Normal Closed N C All switches use one common wire The customer may change the connection on the switch if N C wiring is desired Junction Box A 3 4 inch NPT Transmitter Housing Cover Junction Box B Figure 2 6 8200 COT Housing with Junction Boxes Varec Inc 11 Installation Refer to Table 2 1 on page 12 for more information on limit switch connections 3 4 inch NPT 3 4 inch NPT Figure 2 7 Junct
7. IOMOO5GVAE1110 8200 Current Output Transmitter Signal transmission for accurate level measurement in storage tanks amp HO APPROVED a T mmh D D sb O 9 5 2 oO 3 D 9 r O T S D 5 D Automation Solutions for oil amp gas defense and aviation applications Copyright All rights reserved Printed in the United States of America Except as permitted under the United States Copyright Act of 1976 no part of this publication may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without the prior written permission of the Publisher Varec Inc 5834 Peachtree Corners East Norcross Atlanta Georgia 30092 Phone 770 447 9202 Fax 770 662 8939 Trademarks Acknowledged Varec Inc recognizes all other trademarks Trademarks of other products mentioned in this manual are held by the companies producing them FuelsManager TankView TacFuels Varec and FuelsManager IntoPlane are registered trademarks of Varec Inc All other product and service names mentioned are the trademarks of their respective companies Product Approvals This document and the information provided within are controlled by the approvals agency s listed below All changes to this document must be submitted to and approved by the agency s before public release FM Approvals FM Varec Inc
8. LASS I DIVISION 1 GROUPS C amp D T5 25 C lt Ta lt 85 C NEMA TYPE 4 A APPROVED FLAMEPROOF CLASS I ZONE 1 AEx Ex d IIB T5 20 C lt Ta lt 85 C IP66 Varec Inc O Made In USA 5834 Peachtree Corners East Norcross Atlanta Georgia 30092 USA EX16 08200FM Rev B O O 8200 Series Liquid Level Transmitter O que Model No Serial No Mfg Date C 48 V 50mA 120V 30mA 50 60 Hz B 220 240V 15mA 50 60 Hz CE ken 2G Exd IIB T5 Gb 20 C s Ta lt 85 C IP66 FM10ATEX0022X IECEx FMG10 0006X A Varec Inc at Made In USA 5834 Peachtree Corners East Norcross Atlanta Georgia 30092 USA EX16 08200AT Rev B TU Figure 7 2 8200 COT Nameplate Varec Inc 29 Identification 30 Installation and Operations Manual Document Code IOMOO5GVAE1110 Varec Inc 5834 Peachtree Corners East Norcross Atlanta GA 30092 USA Tel 1 770 447 9202 Fax 1 770 662 8939 WWW Varec com 2006 Varec Inc All Rights Reserved This document is for information purposes only Varec Inc makes no warranties express or implied in this summary The names of actual companies and products mentioned herein may be the trademarks of their respective owners
9. Manager or Software Communications 4 20 mA Loops between DCS PLCs for control capabilities Control Room Field Figure 2 3 Typical Field Wiring 2 5 1 With AC Wiring 1 Connect the lead of the user power to L2 2 Connect the lead of the user power to L4 For user furnished DC power loop power see the board in Figure 2 5 on page 9 2 5 2 User Furnished DC Power Loop Powered 1 Connect the lead of the user power to L2 2 Connect the lead of the user power to L4 Note No load resistor is normally necessary if the receiving device is an analog current sensing device operating within the jumpered range Refer to the instructions for the device in use Varec Inc 7 Installation 2 6 Jumper Settings Two sets of jumpers provide the user the selection of the current output ranges and input voltage ranges If the optional Varec on board 110 220 power supply is used the VAC selection must be made The two AC jumpers must both be set to the applied AC voltage 110 VAC or 220 VAC For user supplied DC power only the current output range needs to be selected AC Version 08 06886 1
10. age V Figure 2 9 Maximum Loop Resistance vs Supply Voltage Chart The maximum acceptable resistance levels are at or below the indicated curve for the current range selected 2 12 Installation Checkout Check the rotation of the sprocket sheave and transmitter mechanical coupling Check the installation of the instrumentation wire loop Proceed to Initial Checkout and Power up in Chapter 3 Configuration on page 17 Varec Inc 15 Installation 16 Installation and Operations Manual Current Output Transmitter 3 Configuration 3 1 Initial Checkout and Power up 1 Recheck jumper selections 2 Recheck wiring throughout the instrumentation loop 3 Loosen the slotted drive coupling set screw using an Allen wrench Set the transmitter to the actual liquid level in the tank by rotating the field adjust knob located at the end of the shaft 4 Replace the explosion proof cover on the transmitter 5 Bring one transmitter at a time online Apply power 6 Check that tank data is received and displayed correctly At the 2500 ATG gaugehead rotate the check knob and determine that the receiving end of the instrumentation indicates the check knob movement 3 2 Calibration The 8200 COT s are calibrated at the factory for full scale operation The scale of the transmitter however can be set to any range between 45 and 10096 See Figure 3 1 on page 18 for the calibration wiring and setup Note tha
11. augehead see Figure 1 1 Transmitter housing 7 3 4 inch NPT Junction box es included with certain options only 7 DC voltage supply transmitter board part number 08 06886 2 Shaft coupling pa encoder mounting hardware Encoder mechanism and optional limit switches AC voltage supply _ ad transmitter board part number 08 06886 1 Cover ___ Figure 1 1 Varec 8200 Current Output Transmitter As the liquid level gauge sprocket drive sheave rotates with liquid level changes the motion turns the transmitter drive shaft The drive shaft is coupled to a worm gear that drives the shaft of a potentiometer Rotation causes the current in the instrumentation output loop of the transmitter to vary The current loop variations are carried through a conductor pair two wires to a central receiver or indicator to provide the signal to an instrument that is calibrated to remotely display the level of the fluid in the tank as it is shown on the gaugehead at the tank An increase in current normally indicates a rising liquid level An outage reverse reading current output option is available A typical installation of the 8200 COT consists of directly mounting it onto a 2500 ATG gaugehead It may also be mounted onto a gaugehead of other manufacturers The transmitter requires nominal electrical input of 15 48 volts of regulated direct current VDC or 120 VAC 220 240 VAC Current sensin
12. e Figure 2 2 on page 5 and perform the following steps 1 Remove the access cover from the gaugehead Install the transmitter in place of the accessory access cover Make certain that the transmitter drive engages the gauge counter wheel AS Proceed with field wiring Note Please read the safety guidelines section before you begin 2 5 Field Wiring Warning Do not apply power to the transmitter until all wiring connections have been made and the cover of the transmitter has been replaced Warning Do not apply power until the jumper settings have been checked and the instrumentation current loop rechecked Do not apply power in a hazardous environment until the explosion proof case is closed Caution Incorrect field wiring connections can damage the transmitter electronics and cause system malfunctions Note difference between user furnished and on board power Figure 2 3 on page 7 illustrates typical field wiring for a transmitter installation with an on board power supply Each transmitter has a two conductor signal cable back to the control room If AC power is required an additional three conductor cable is wired to the 8200 COT either 110 VAC or 220 240 VAC Follow national and local codes for wiring of power and signal cables Installation and Operations Manual Current Output Transmitter Tank Gauge and Transmitter Loop Communications Power Signal 8130 RTU Fuels
13. e Installation and Operations Manual The exploded view in that manual shows the mechanical relationship between this accessory and the gaugehead Varec Inc 3 Installation Manhole A S Tape conduit pipework Sy Float amp guidewires s Tank gauge Na and NS Y transmitter temperature Power and RTD communications conduit Figure 2 1 Typical Tank Installation Each 8200 COT requires two wires for analog signals DC versions are loop powered while AC versions require an additional three wires for power Warning Whenever the back cover of the gaugehead is removed stand to one side as the last bolt is removed If the negator motor spring is broken the broken pieces may cause injury when the cover is removed Warning The mechanical connections between the gauge float guide cables the float the tape and the gaugehead provide a resistance to ground that is adequate for the safe electrical drain of electrostatic charges that may accumulate in the tank and the product Worker activity and worker clothing may accumulate electrostatic charges on the body of a worker Care should be used in flammable environments to avoid the hazard Installation and Operations Manual Current Output Transmitter Drive pin on sprocket E lo o TON 1 o o 2 2 o _ o oo V Gaugehead Transmitter Sprocket wheel and tape Slotted drive coupl
14. ee 14 2 11 Loop Resistance sce pede REA a eda EEG x 14 2 12 Installation Checkout 000 cette 15 3 Gontig ratl li user ena ae eds pi E a 17 3 1 Initial Checkout and Power up llsssslselee ere 17 3 2 Calibration lisse n 17 3 3 Limit Switch Operational Setup liliis 19 4 Maintenance x orones ore ded aie ope bp a aic 21 4 1 Major System Assemblies and Components oococcoccc o 22 5 Specificallons osea Vr uet ra 25 pk Generalist i n A LS bi VE oder 25 5 2 Available Level Ranges ooooccoccccoo eee 25 5 3 Environmental lesse 26 5 4 Options and Accessories ooooocoocco lees 26 6 Order Godes ss ica a a Vau Qr CR qa es dede Rants 27 T MGCHUMCANON overall ede t adieu ott Ioa tes 29 7A Device Designation veria id a Pee 29 LANA s o e AA a aa ene TEE 29 442 Nameplate oi sina dees tara eee eR RR ead aara a a aaa 29 Varec Inc vii Contents viii Installation and Operations Manual Current Output Transmitter 1 Introduction This manual is designed to assist the user in the installation operation calibration and maintenance of the Varec 8200 Current Output Transmitter 8200 COT 1 1 Getting Acquainted with the Varec Current Output Transmitter The 8200 COT is an electromechanical device that is mechanically coupled to the sprocket drive sheave of a Varec 2500 Automatic Tank Gauge 2500 ATG gaugehead or other liquid level indicating g
15. f only Varec manufactured or supplied parts to maintain or service Varec 8200 Current Output Transmitters Terms of Use The information provided in this document is provided as is without warranty of any kind Varec Inc disclaim all warranties either express or implied including the warranties of merchantability and fitness for a particular purpose In no event shall Varec Inc or its suppliers be liable for any damages whatsoever including direct indirect incidental consequential loss of business profits or special damages even if Varec Inc or its suppliers have been advised of the possibility of such damages This manual is solely intended to describe product installation and functions and should not be used for any other purpose It is subject to change without prior notice This manual was prepared with the highest degree of care However should you find any errors or have any questions contact one of our service offices or your local sales agent Installation and Operations Manual Safety Precaution Definitions Caution Damage to equipment may result if this precaution is disregarded Warning Direct injury to personnel or damage to equipment which can cause injury to personnel may result if this precaution is not followed Safety Precautions Read this manual carefully and make sure you understand its contents before using this product Follow all instructions and safety guidelines presented in this manual when
16. g analog instruments that measure current ranges of either 4 20 mA or 10 50 mA signal are required in the current instrumentation loop Varec Inc Introduction 2 Installation and Operations Manual Current Output Transmitter 2 Installation 2 1 Unpacking The 8200 COT s are shipped fully assembled and ready for installation Place the shipping container on a secure bench before unpacking Open the shipping container taking care not to damage the contents Carefully remove transmitter from the shipping container and place it on top of the bench Inspect it for shipping damage Report any damage to the carrier 2 2 Storage Prior to Installation If the transmitter is to be stored prior to installation it should be repacked in its shipping container and stored in a temperature and humidity controlled environment Caution This equipment should be installed only by qualified personnel familiar with the installation instructions in this manual and in the 2500 Automatic Tank Gauge Installation and Operations Manual 2 3 Mounting on Varec Gaugeheads The 8200 COT is suitable for installation on 2500 ATG gaugeheads or on the gaugeheads of other manufacturers This procedure provides instructions to mount the transmitter on a 2500 ATG gaugehead as shown in Figure 2 1 on page 4 Instructions applicable to other tank gauges follow in later paragraphs To install the gaugehead refer to the 2500 Automatic Tank Gaug
17. ing Figure 2 2 Typical Transmitter Mounting 1 Ifthe gaugehead is oil filled drain the oil then remove the back cover of the gaugehead 2 Remove the accessory back cover cap from the back cover of the gaugehead see the 2500 Automatic Tank Gauge Installation and Operations Manual 3 Mountthe transmitter in place of the cap onto the back cover of the gaugehead using the four hex head cap screws that attached the cover cap 4 Install the back cover on the gaugehead making certain that the transmitter slotted drive coupling slot engages the pin on the gaugehead sprocket wheel Using the field adjust knob located at the end of the shaft make sure the slotted drive coupling is securely engaged with the drive pin 5 Loosen the slotted drive coupling set screw using an Allen wrench Set the transmitter to the actual liquid level in the tank by rotating the field adjust knob located at the end of the shaft Once the level has been set re tighten the set screw 6 Proceed with field wiring Varec Inc Installation 2 4 Mounting on Alternate Gaugeheads Typical Whessoe or Shand amp Jurs L amp J Gaugehead Mounting The following steps describe the typical tasks required for mounting the transmitter on a Whessoe 2006 L amp J 92020 92006 GPE or alternate gaugehead An adapter is required Refer to Chapter 4 Maintenance on page 21 The gaugehead is assumed to have been previously installed on the tank Se
18. ion Box B DC Connectors Connection Wire Color Description 8 Blue Switch 4 N O 7 Yellow Switch 3 N O 6 Violet Switch 2 N O 5 Orange Switch 1 N O 4 White Limit switch common 3 Green Signal reference ground 2 Gray L4 1 Red L2 Table 2 1 Junction Box B Limit Switch Connections 12 Installation and Operations Manual Current Output Transmitter Refer to Table 2 2 for more information on AC electrical connections 3 4 inch NPT 3 4 inch NPT Figure 2 8 Junction Box A AC Electrical Connectors Connection Wire Color Description GND Green Ground AC2 White N Neutral ACI Black H Hot Table 2 2 Junction Box A AC Electrical Connections Varec Inc 13 Installation 2 10 Initial Calibration Transmitters are calibrated at the factory for full scale range operation The scale may be selected by the user to any range between 45 and 100 Refer to Chapter 3 Configuration on page 17 for calibration procedures Calculate the loop resistance of the installed instrumentation for full scale operation before installing the wiring Then check it after the wiring has been installed 2 11 Loop Resistance It is necessary to compute the total circuit resistance to determine the correct gauge of field signal wire to use The maximum allowable total loop resistance the sum of the wire line and receiver load resistance may be calc
19. losure NEMA 4 Rated ATEX Flameproof EX Il 2 G Ex d IIB T5 Ta 85 C IECEx IC Flameproof Ex d IIB T5 Ta 85 C Environmental IP66 NEMA 4 Table 5 3 Environmental 5 4 Options and Accessories Item Specification Conduit Junction Box es N A Reverse Reading Output N A Limit Switches Two 2 or four 4 SPDT limit switches cam operated can be supplied as an option They have the following ratings 20A 125 250 460 VAC 10A 125 VAC Tungsten filament Lamp Load 1 HP 115 VAC 2 HP 250 VDC 1 2 A 125 VDC 0 25 A 6250 VDC Note The optional switches can be selected for normally open N O or normally closed N C oper ation They are mechanically operated directly from the main drive gearing and can be independently configured to switch at any desired tank level Table 5 4 Options and Accessories 26 Installation and Operations Manual Current Output Transmitter 6 Order Codes Power Supply O 15 48 VDC 1 115 VAC 2 220 240 VAC Level Ranges 1 0 12 5 ft 2 0 25ft 3 0 50ft 4 0 100ft 5 0 3 75m 6 0 7 5m 7 0 15m 8 0 24m Approvals O FMus Explosion Proof Class Division 1 Groups C amp D T5 Ta 85 C Flameproof Class Zone 1 AEx d IIB T5 Ta 85 C Enclosure NEMA 4 1 cFM Explosion Proof Class I Division 1 Groups C amp D T5 Ta 85 C Flameproof Class Zone 1 Ex d IIB T5 Ta 85 C Enclosure NEMA 4 2 ATEX Flameproof Ex Il 2 G Ex d II
20. ound that is adequate for the safe electrical drain of electrostatic charges that may accumulate in the tank and the product Worker activity and worker clothing may accumulate electrostatic charges on the body of a worker Care should be used in flammable environments to avoid the hazard Warning Broken negator motor spring pieces can cause injury when the back cover of the gaugehead is removed Whenever the back cover is removed stand to one side as the last bolt is removed Varec Inc vi Installation and Operations Manual Current Output Transmitter Contents 1 JIntFOOU GOD coma rin cti tata Re Ug e 1 1 1 Getting Acquainted with the Varec Current Output Transmitter 1 2 JnstallallOni cone iot A re quei Pace qur pas ahs 3 2 1 Unpacking ee ee eek RU Re a ak MRE esp oe te den e uh 3 2 2 Storage Prior to Installation lille 3 2 3 Mounting on Varec Gaugeheads ocococccccc eects 3 2 4 Mounting on Alternate GaugeheadS 0c eects 6 2 5 Field Wining setata ee ae raa te tee tees 6 2 5 1 With AC Wiring esi asiain 6 ce rh 7 2 5 2 User Furnished DC Power Loop Powered llle 7 2 6 Jumper Settings onanan aaa 8 2 7 AC Electrical Connections 0 000 cee tees 10 2 8 Signal and Switch Wiring Color Codes 200 cece eee eee 10 2 9 Junction Boxes and Limit Switches 000 0c eee eee eee 11 2 10 Initial Calibration 2 0 t
21. t a power supply is needed for the calibration procedure If the transmitter does not have a Varec internal power supply an external power supply must be used for calibration Values without parentheses are for the 4 to 20 mA range Values in parentheses are for the 10 50 mA range 1 Place the transmitter on a work bench If a previously installed transmitter is being recali brated only the encoder electronics subassembly need be placed on the bench 2 SeeFigure 3 1 on page 18 and connect calibration equipment to the transmitter Turn the transmitter shaft until the transmitter encoder dial is set to zero 4 Useajeweler s screwdriver to adjust the trimmable resistor labeled ZERO Adjust for a meter current indication of 4 mA 10 mA 5 Turn the transmitter shaft to set the transmitter dial to the maximum of the desired range The range can be set anywhere greater than or equal to 45 of the maximum 6 Usethe jeweler s screwdriver to adjust the trimmable resistor labeled SPAN Adjust for a meter current indication of 20 mA 50 mA 7 Repeat steps 4 6 as needed Varec Inc 17 Configuration On Board Power Supply Green White Black HA Zero VR2 Span VR1 Current output board Multimeter Off Board Power Supply External power supply 15 48 VDC Zero VR2 Span VR1 Current output board Multimeter Figure 3 1 Calibration Test Setup 18 Installation and
22. transmitter to the gaugehead is not binding and that operation of the check knob on the gaugehead results in an appropriate change on the receiving instrument The mechanical coupling to the potentiometer should be free and not binding Varec provides maintenance service contracts that provide regular periodic inspection and maintenance at substantial savings Some repair tasks may require special tools Varec Inc 21 Maintenance 4 1 Major System Assemblies and Components The major system assemblies and components for the 8200 COT are identified in Table 4 1 and illustrated in Figure 4 1 Item Part No Description 1 D5235 011PT Std Xmtr Housing Cover 2 P14 170 Housing Cover O Ring 7 3 08 06886 1 4 20 mA Xmtr Bd 110 220 VAC was BMC190 01 4 08 06886 2 4 20 mA Xmtr Bd 15 48 VDC User Supp was BMC1 90 00 5 BME11777 001 Encoder 0 12 5 ft FWD BME11777 002 Encoder 0 25 ft FWD BME11777 004 Encoder 0 50 ft FWD BME11777 006 Encoder 0 100 ft FWD BME11777 008 Encoder 0 3 75M FWD BME11777 009 Encoder 0 7 5M FWD BME11777 010 Encoder 0 15M FWD BME11777 011 Encoder 0 24M FWD 6 08 08744 Terminal Strip Assembly 06 03315 2 2 SPDT Limit Switch Parts Kit not shown 06 03315 4 4 SPDT Limit Switch Parts Kit not shown 13 05956 102 Adapter kit for mounting to L amp J 92514 92020 and 92030 gauges 13 05956 202 Adapter kit for mounting to L amp J 92006 and Whessoe Varec 2006 20
23. ulated with the aid of the chart in Figure 2 9 on page 15 The following two equations can be used to calculate maximum loop resistance line and load 4 20 mA Current Output MAX RESISTANCE 50 DC POWER SUPPLY VOLTAGE 15 10 50 mA Current Output MAX RESISTANCE 20 DC POWER SUPPLY VOLTAGE 15 Note If the transmitter uses an internal power supply the value of the DC POWER SUPPLY VOLTAGE entered into the equation is 30 VDC Varec recommends that 22 gauge or larger size wiring be used The larger the gauge number the smaller the wire diameter Typical telephone field wiring is 21 gauge or larger Mechanical field conditions affect the wire choice as well as cost As an example determine the minimum gauge of wire that is required to connect a transmitter 30 VDC 4 20 mA range located 3000 feet from the receiving device The receiving device load is 100 ohms From Figure 2 9 on page 15 it is seen that the maximum loop resistance is 600 ohms According to wire data charts 22 gauge wire has a resistance of 15 14 ohms per 1000 feet Twice the wire run is 6000 feet the total loop distance The wire resistance is 91 ohms The total loop resistance receiving device plus loop resistance is 191 ohms well under the 600 ohm maximum 14 Installation and Operations Manual Current Output Transmitter 2000 1750 4 20 mA Curve suyO e ueasisey 500 10 50 mA Curve 250 15 20 25 30 35 40 45 50 Supply Volt
24. using this product If the user does not follow these instructions properly Varec cannot guarantee the safety of the system Note Comply with all applicable regulations codes and standards For safety precautions the user should refer to the appropriate industry or military standards Caution Electrical Hazard Read and understand static and lightning electrical protection and grounding described in API 2003 Make certain that the tank installation operation and maintenance conforms with the practice set forth therein Warning Striking the gaugehead with a metal object could cause a spark to occur When removing or replacing the gaugehead in flammable or hazardous liquid storage areas take necessary measures to protect the gaugehead from impact Warning Volatile fumes may be present Ensure that the tank has been leak and pressure tested as appropriate for the liquid to be stored Observe appropriate safety precautions in flammable or hazardous liquid storage areas Do not enter a tank that has contained hydrocarbons vapors or toxic materials until a gas free environment is certified Carry breathing equipment when entering a tank where oxygen may be displaced by carbon dioxide nitrogen or other gases Wear safety glasses as appropriate Use a hard hat Warning Sparks or static charge could cause fire or explosion The mechanical connections between the guide cables the float the tape and the gaugehead provide a resistance to gr
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