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GASMAX II Operation & Maintenance Manual, Revision 7.0

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Above the LCD display, three LEDs indicate the status of the level and fault alarms. If relays are installed,
the LEDs indicate whether the relays are active. Note that if any relay is set for FAILSAFE operation, if LED
is ON the relay will be de-energized. In dual channel mode, if either channel is in alarm the corresponding
A1 or A2 indicator LED (and relay) will be energized.

Figure 4-5: GASMAX Data Display

Two LEDs monitor the MODBUS RS-485 transmit (TXD) and receive (RXD) buffers. Flashing indicates sent
or received data. RXD will flash whenever a message from the MODBUS master is received and TXD will
flash when any response message is transmitted from the GASMAX.

Figure 4-6: GASMAX Trend Display

The TREND screen displays a graph with the last 30 minutes of live readings. The EUNITS value is shown at
the top and Alarm 1 and Alarm 2 levels are shown as dotted (A1) and dashed (A2) lines.

M E A S U R E M E N T N A M E

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1 2 % L E L

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Engineering Units Value

Horizontal Bargraph

Alarm Levels

“Measurement ame”

Alarm Indication LEDs

MODBUS Communications LEDs

Engineering Units

30 Minute Trend

Alarm 2 Level (Dashed)

Alarm 1 Level (Dotted)

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Summary of Contents for GASMAX II

Page 1: ...GDS Corp 1245 Butler Road League City TX 77573 409 927 2980 409 927 4180 Fax ww gdscorp com Operation and Maintenance Manual GASMAX II Single Dual Channel Gas Monitor ...

Page 2: ...N MANUAL COMPLETELY BEFORE OPERATING OR SERVICING ATTENTION POUR DES RAISONS DE SÉCURITÉ CET ÉQUIPEMENT DOIT ÊTRE UTILISÉ ENTRETENU ET RÉPARÉ UNIQUEMENT PAR UN PERSONNEL QUALIFIÉ ÉTUDIER LE MANUE D INSTRUCTIONS EN ENTIER AVANT D UTILISER D ENTRETENIR OU DE RÉPARER L ÉQUIPEMENT REVISION HISTORY Revision 7 0 7 16 16 General update Copyright 2016 GDS Corp All Rights Reserved P N 1200 0851 07 ...

Page 3: ...LIBRATION ______________________________________________________ 29 6 MAINTENANCE_____________________________________________________ 31 7 USER MENUS ______________________________________________________ 33 8 TROUBLESHOOTING ________________________________________________ 44 9 MODBUS INTERFACE ________________________________________________ 47 10 SPECIFICATIONS ________________________________...

Page 4: ...E 4 12 REMOTE BRIDGE SENSOR CONNECTION 19 FIGURE 4 13 REMOTE SENSOR TRANSMITTER CONNECTION 20 FIGURE 4 14 REMOTE 4 20MA INPUT CH 2 21 FIGURE 4 15 DUAL 4 20MA INPUT OPTION 22 FIGURE 5 1 GASMAX SINGLE CHANNEL DISPLAY 23 FIGURE 5 2 GASMAX DUAL CHANNEL DISPLAY 23 FIGURE 5 3 USER MENU SCREEN 24 FIGURE 5 4 ACCESSING CAL MODE 24 FIGURE 5 5 GASMAX DATA DISPLAY 25 FIGURE 5 6 GASMAX TREND DISPLAY 25 FIGURE ...

Page 5: ... FIGURE 13 1 GASMAX II LOCAL SENSOR SPARE PARTS 52 FIGURE 13 2 GASMAX SENSOR HEAD 52 FIGURE 13 3 GASMAX EXPANSION BOARDS 53 FIGURE 13 4 GASMAX SENSOR HEAD SPLASH GUARD FLOW CELL 53 FIGURE 13 5 GASMAX II REMOTE DIRECT SENSOR HEAD 54 FIGURE 13 6 GASMAX II REMOTE SENSOR TRANSMITTER 54 FIGURE 13 7 GASMAX II DUAL WITH Y ADAPTER 55 FIGURE 14 1 GASMAX DIMENSIONS 56 FIGURE 14 2 GASMAX DUAL LOCAL SENSOR DI...

Page 6: ... the level of certain gases in ambient air Accuracy in atmospheres containing steam or inert gases cannot be guaranteed Always mount the sensor head vertically with the sensor head facing down However the GDS IR infrared sensor may be mounted vertically or horizontally Do not paint transmitter or sensor assembly Do not operate the GASMAX II if its enclosure is damaged or cracked or has missing com...

Page 7: ...d real time clock and event log allows the GASMAX II to track calibration and alarm events for later recall on the LCD readout GASMAX II SENSORS The GASMAX II supports a number of different sensors that fall into two categories toxic and bridge Toxic sensors use an electrochemical process to detect gas and are often referred to as echem sensors Examples include oxygen hydrogen sulfide and mercapta...

Page 8: ...ews and allow the display to hang by the ribbon cable This can be done without removing power to the unit The I O power supply board is mounted on the back side of the enclosure and provides power management signal output and bridge input circuitry Connections for power input and signal output on provided on the left hand side terminal strip and connections for a remote bridge sensor or 4 20mA inp...

Page 9: ...acing down If necessary a Splash Guard p n 10 0205 should be attached if there is any chance that water or liquid spray could enter the sensor opening from below Be sure to leave sufficient room 6 below the sensor head to allow for air flow easy access for attachment of a Calibration Cup and or removal of the sensor head cover for sensor replacement MOUNTING A REMOTE SENSOR GASMAX II remote sensor...

Page 10: ...embly and remove it The display will remain connected to the IO Power Supply PCB mounted in the back of the enclosure by a short ribbon cable Route the power and signal wires through the conduit entry and connect to terminal block TB2 Plus 24VDC connects to TB2 1 DC Ground connects to TB2 4 Channel One 4 20mA output is available on TB2 2 and Channel Two 4 20mA output is available on TB2 3 GDS Corp...

Page 11: ... Channel 1 or Channel 2 exceed the programmed alarm 2 threshold and can be acknowledged reset from the front panel or via TB3 Relay K3 indicates sensor failure and is always failsafe normally open held closed Remote Alarm Reset TB3 can be used to acknowledge an Alarm 2 relay contact closure via a remote pushbutton Use a momentary dry contact normally open switch between and to force a reset Wiring...

Page 12: ...es that two wires be installed in the and G terminals on the G M I O Power Supply board This can be difficult if wire sizes are larger than 18ga Further the addition of multiple MODBUS and power wires inside the GASMAX enclosure can create problems and possibly damage components if the display has to be forced into place Finally if it is desired to disconnect the GASMAX from the MODBUS loop for tr...

Page 13: ... is attached to the GASMAX either on the bottom fitting or one of the side fittings depending on installation requirements Specify BOTTOM LSIDE or RSIDE when ordering See Fig 4 8 Figure 3 5 MODBUS JBox Installation Options G B G B P to G M M B to G M ibbon to isplay I Power upply P I C M P T T G TB TB I G B G B M B I M B I M B T M B T ...

Page 14: ... source Each 4 20mA output shares the same common ground and are therefore not isolated from each other This board is connected piggyback to the back of the GASMAX II Display Assembly GASMAX II units may be field upgraded with this option at any time NOTE THE ISOLATED 4 20MA AND MODBUS RELAY BOARDS SHARE THE SAME CONNECTOR AND THEREFORE CANNOT BE INSTALLED AT THE SAME TIME Figure 3 6 Optional Dual...

Page 15: ...he back of the Display Assembly See Fig 4 5 IMPORTANT TOXIC SENSORS MAY FAIL TO OPERATE PROPERLY IF POWER IS NOT APPLIED WITHIN 6 MONTHS OF SHIPMENT CONTACT GDS CORP FOR RECOMMENDATIONS IF THIS SITUATION MAY OCCUR Figure 3 7 Local Smart Toxic Sensor Connection ibbon to isplay I Power upply Bridge ensor C M CT P T T G TB TB ibbon to isplay isplay ssembly ocal Toxic ensor Cable from sensor head conn...

Page 16: ...Further the cable used should be three wire stranded with foil shield and should be run inside metallic rigid conduit GDS Corp recommends Belden B8771 The cable shield must be connected to an earth ground at ONE END ONLY NOTE Poured seals and rigid conduit are required if the remote sensor is installed in a hazardous area IMPORTANT TOXIC SENSORS MAY FAIL TO OPERATE PROPERLY IF POWER IS NOT APPLIED...

Page 17: ... the remote sensor transmitter is connected as shown below 24V is available on TB1 pin 1 IMPORTANT TOXIC SENSORS MAY FAIL TO OPERATE PROPERLY IF POWER IS NOT APPLIED WITHIN 6 MONTHS OF SHIPMENT CONTACT GDS CORP FOR RECOMMENDATIONS IF THIS SITUATION MAY OCCUR Figure 3 9 Channel 1 Remote Toxic Sensor Transmitter 10 0233 D4 If the 10 0233 B4 bridge 4 20ma input I O power supply board is installed in ...

Page 18: ...onnected to the Channel 2 mart ensor connector on the IO Power Supply board located on the back of the explosion proof enclosure See Fig 4 7 NOTE LOCAL SMART BRIDGE SENSORS AUTOMATICALLY ADJUST SENSOR EXCITATION VOLTAGE Figure 3 11 Local Smart Bridge Sensor Connection ibbon to isplay I Power upply Bridge ensor C M CT P T T G TB TB ibbon to isplay isplay ssembly ocal Bridge ensor Cable from sensor ...

Page 19: ... be connected to an earth ground at ONE END ONLY Remote bridge sensors connect to TB1 on the IO Power Supply board located on the back of the explosion proof enclosure See Fig 4 8 NOTE Poured seals and rigid conduit are required if the remote sensor is installed in a hazardous area WARNING REMOTE BRIDGE SENSORS DO NOT AUTOMATICALLY ADJUST SENSOR EXCITATION VOLTAGE IF SWITCHING SENSOR TYPES BE SURE...

Page 20: ...he right hand side terminal strip of the I O power supply board The 10 0233 420 I O power supply board must be configured for 4 20mA input as shown below NOTE Poured seals and rigid conduit are required if the remote sensor is installed in a hazardous area IMPORTANT TOXIC SENSORS MAY FAIL TO OPERATE PROPERLY IF POWER IS NOT APPLIED WITHIN 6 MONTHS OF SHIPMENT CONTACT GDS CORP FOR RECOMMENDATIONS I...

Page 21: ... available to support a local or remote toxic sensor The calibrated output for channel 2 is available on TB2 Pin 3 NOTE Poured seals and rigid conduit are required if the remote sensor is installed in a hazardous area WARNING IO POWER SUPPLY BOARDS THAT HAVE BEEN CONVERTED TO 4 20MA WILL NOT SUPPORT LOCAL OR REMOTE BRIDGE TYPE SENSORS ATTACHING A BRIDGE TYPE SENSOR WILL DAMAGE OR DESTROY THE SENSO...

Page 22: ...he GASMAX DC supply connected to TB2 WARNING DO NOT CONNECT A BRIDGE SENSOR TO TB1 IF THE INPUT HAS BEEN CONFIGURED FOR 4 20MA THE 24V EXCITATION VOLTAGE WILL DESTROY THE BRIDGE SENSOR The most common usage for dual 4 20mA inputs is for use with local or remote GDS IR Infrared Combustible Sensors or GDS 49 Remote Toxic Sensor Transmitters Figure 3 15 Dual 4 20mA Input Option ibbon to isplay I Powe...

Page 23: ...our magnetic switches on the face of the GASMAX II arranged in a quadrant around the LCD display these are labeled NEXT EDIT DOWN CAL and UP To activate or press a magnetic switch swipe the magnetic wand near the switch For the balance of this manual the term press will be used to describe activation of any key via the magnetic wand Figure 4 1 Gasmax Single Channel Display Pressing the NEXT key ca...

Page 24: ...ibration is critically important to the continued safe operation of any gas detection system See Chapter 6 for more information on calibration Figure 4 4 Accessing Cal Mode NOTE TAKE CARE WHEN APPLYING CALIBRATION GAS TO THE GASMAX WHILE NOT IN CALIBRATION MODE THIS WILL CAUSE AN INCREASE IN THE 4 20MA OUTPUT SIGNAL AND MAY RESULT IN UNINTENDED AND UNEXPECTED ALARM CONDITIONS MORE INFORMATION ON D...

Page 25: ... transmit TXD and receive RXD buffers Flashing indicates sent or received data RXD will flash whenever a message from the MODBUS master is received and TXD will flash when any response message is transmitted from the GASMAX Figure 4 6 GASMAX Trend Display The TREND screen displays a graph with the last 30 minutes of live readings The EUNITS value is shown at the top and Alarm 1 and Alarm 2 levels ...

Page 26: ... GDS CORP FOR RECOMMENDATIONS IF THIS SITUATION MAY OCCUR BRIDGE SENSOR SETUP Bridge sensors require a very specific excitation voltage and must be balanced prior to operation Local Smart Bridge Sensors The GASMAX II automatically loads all necessary setup information from locally connected bridge sensors via the 10 pin sensor cable Voltage adjustment is not necessary but Balance adjustment may be...

Page 27: ...absolutely sure that no target gas is present G Corp recommends applying zero air to the sensor during the balance adjustment 2 Access the Technicians Menu on the GASMAX See User Menus 3 Select Set Balance menu item 4 Use the Up and DOWN keys to adjust the displayed reading to zero Note a reading of corresponds to a counts value of 512 NOTE BRIDGE SENSORS DRIFT DURING WARMUP AND REQUIRE TIME TO ST...

Page 28: ...N GAS value Set to match concentration of calibration gas cylinder 4 CAL MARKER value Adjust desired output mA during calibration 5 ALARM 1 ALARM 2 settings Set for desired levels NOTE If relays are not installed GASMAX II programmable alarm levels affect operation of front panel LEDs only A NOTE ON WARM UP Allow the GASMAX II to stabilize for at least four hours preferably overnight if possible T...

Page 29: ...X II calibration guidelines Calibration accuracy is only as good as the calibration gas accuracy GDS Corp calibration gases are traceable to NIST National Institute of Standards and Technology Never use calibration gas that has passed its expiration date Check the SPAN GAS VALUE setting and make sure it matches the calibration gas See Fig 6 2 Always use a GDS Corp calibration cup that completely s...

Page 30: ... setup shown in Fig 5 1 apply clean ZERO air unless it can be guaranteed that no target gas is present After the reading stabilizes press the EDIT key to complete the ZERO calibration 4 If the zero calibration is successful a ZERO CAL SUCCESSFUL message is displayed followed by an APPLY SPAN message 5 Disconnect the zero air cylinder and connect the span gas cylinder and apply the SPAN gas After t...

Page 31: ... calibrated before replacing the sensor check the wiring between the sensor and GASMAX II for electrical continuity In addition check for signs of moisture or corrosion in any of the cabling or junction boxes To physically replace a GASMAX sensor perform the following steps 1 Declassify the area or remove power to the GASMAX II 2 Unscrew the sensor head cover If unable to open the cover by hand us...

Page 32: ...IDGE SENSORS GASMAX II monitors use GDS Corp type 10 95XX YYYY bridge sensors where is the sensor type and YYYY is the full scale range or example a replacement catalytic bead sensor for 100 LEL methane would be part number 9570 Local Smart Sensors are automatically recognized by the GASMAX II when installed If the sensor is the same gas type as was previously installed the sensor s calibration da...

Page 33: ...ENU GASMAX II setup variables are stored in non volatile memory and can be modified by the end user to better match a particular application The GASMAX II Main Menu tree is shown below To access the Main Menu swipe the magnetic wand over the EDIT key Figure 7 1 Main Menu Flowchart ...

Page 34: ...alibration gas value be between 25 and 75 of full scale Calibrating at 100 of scale is not recommended READOUT DEADBAND forces low values to continue to read zero This is useful when there are small amounts of background gases that may cause fluctuating readouts The highest amount of deadband allowed is 5 NOTE THE 4 20MA OUTPUT IS NOT AFFECTED BY THIS SETTING TRACK NEGATIVE allows the display to s...

Page 35: ...f a successful calibration cycle During normal operation the GASMAX II transmits a 4mA signal during the CAL PURGE delay to allow time for the span gas to dissipate With TX Sensor Life YES the GASMAX II transmits 4mA for the first 10 seconds then for 5 seconds transmits a value between 4mA and 5mA with 4mA equal to 0 sensor life and 5mA equal to 100 sensor life see Figure 5 5 The output then retur...

Page 36: ...ter the alarm condition clears LOW TRIP set to YES causes the alarm to trip as the value falls below the set point LATCHING set to YES causes the alarm to remain active even after the condition is gone and only reset when the UP RESET key is pressed from a data display DISPLAY EVENT LOG displays the stored events in the Event Log These include power on cold boot alarms and alarm acknowledge events...

Page 37: ...ation screen NEW SENSOR displays the date when a new sensor was last installed RECENT CAL displays the most recent calibration date CLOCK DELAY SETUP PAGE The GASMAX II is equipped with a crystal controlled battery backed real time clock that maintains local Time and Date These values are factory preset to US Central Time and should be reset to correctly match the current time zone during installa...

Page 38: ...ure 7 8 Contrast Menu HELP SCREEN PAGE The Help screen contains several pages of information describing GASMAX II operation DIAGNOSTICS PAGE The Diagnostics page provides tools for use during setup or testing Since relays are not available on the GASMAX II the Relay Test option is not functional Figure 7 9 Diagnostics Menu CL OCK DE L A Y S E T UP T i me 12 3 5 4 2 Da t e 0 4 2 2 0 4 Wa r m Up S e...

Page 39: ...n against operation by unauthorized personnel or those with malicious intent Figure 7 10 System Security Menu CONTACT NAME is a 12 character ASCII field available for displaying a phone or name of personal who knows the Pass Code Lost Pass Codes may be recovered by entering the locked security menu and holding the UP key for 5 seconds The 4 digit code appears near the bottom of the screen SECURE L...

Page 40: ...e LEL Current channel Channel 2 OUTPUT ZERO SPAN TRIM provides a way to precisely set the GASMAX II 4mA and 20mA outputs to compensate for variation in output components These settings are programmed at the factory and should not be modified REAL TIME CLOCK adjusts the date and time for use in EVENT LOGGING The current time and date can also be adjusted from the Main Menu See Section 7 MODEL is fa...

Page 41: ...NG C I G T EXCITATION VOLTAGE MAY DAMAGE OR DESTROY THE SENSOR S E NS OR B A L A NCE Re a d i n g 3 Co u n t s 4 9 6 UP DN t o Ch a n g e NE X T t o E x i t S E NS OR V OL T A GE V o l t s 2 0 4 UP DN t o Ch a n g e NE X T t o E x i t WA RNI NG Hi g h v o l t a g e ma y d a ma g e s e n s o r WA RNI NG P r e v i o u s Ca l i b r a t i o n wi l l b e e r a s e d E DI T t o c o n f i r m NE X T t o ...

Page 42: ...bration the Preamp gain can be adjusted using the UP DOWN keys GDS Corp does not recommend adjusting the Preamp Gain to any value higher than 85 WARNING A FULL CALIBRATION SHOULD ALWAYS BE PERFORMED AFTER ANY CHANGE IN THE PREAMP GAIN SETTING Figure 7 15 Preamp Gain Set Menu Simple Sensor Input Type Local Smart Sensors automatically configure Input Type to match sensor requirements However when us...

Page 43: ...O2 ppm Ozone ppm Cl2 ZERO CAL VALUE should always be set to RAW MIN MAX COUNTS is factory preset and should not be changed MARKER ACTIVE enables an input level monitor on the channel 2 input if the input is set to accept a 4 20mA signal If Marker Active is set the YES the following actions may be programmed to occur when the input signal matches the Marker Level setting MARKER TX LED will cause th...

Page 44: ...uring span calibration too low sensor may be defective However it may be possible to temporarily continue operation by increasing PREAMP GAIN See Section 8 2 for more details LOCAL SMART BRIDGE SENSOR NOT RECOGNIZED If a locally connected bridge sensor is not recognized on power up or when installed verify that the sensor cable is plugged in as shown in the section on local bridge sensors and that...

Page 45: ... toxic 31002 for channel 2 combustible Verify that there are no other MODBUS slave devices with identical MODBUS address GASMAX DISPLAY BLANK Verify DC power at IO Power Supply board TB2 terminals 1 24 and 4 Gnd Verify ribbon cable connected between IO Power Supply board and Display Assembly Verify that there are no wires connected to the 4 20mA LOOP INPUT on the back of the Display Assembly GASMA...

Page 46: ...following procedures Disconnect power Hold a magnetic wand over the EDIT key and apply 24VDC power Hold the magnet until the screen shows a C B T message Hold the magnetic wand over the T key until the nter code sequence appears Press four P keys to enter the MITT menu Make a change in any value and then restore the value to its original setting Press the NEXT key to exit and THEN IMMEIDATELY PLAC...

Page 47: ...A Raw 31001 4 N A 10 bit value 200 4mA 1000 20mA Ch 2 D2A Raw 31002 4 N A 10 bit value 200 4mA 1000 20mA Ch 1 A2D Raw 31003 4 N A 10 bit value from A D converter Ch 2 A2D Raw 31004 4 N A 10 bit value from A D converter Ch 1 Status 31005 4 N A See Channel Status Word definition Ch 2 Status 31006 4 N A See Channel Status Word definition Alarm Status Word 31007 4 N A See Alarm Status Word definition ...

Page 48: ... Zero Real 41001 3 N A Real value without decimal point Ch 1 Cal Zero Divisor 41002 3 N A Divisor 1 10 100 or 1000 Ch 1 Cal Span Real 41003 3 N A Ch 1 Cal Span Divisor 41004 3 N A Ch 1 Zero Real 41005 3 N A Ch 1 Zero Divisor 41006 3 N A Ch 1 Span Real 41007 3 N A Ch 1 Span Divisor 41008 3 N A Ch 1 Fault Real 41009 3 N A Ch 1 Fault Divisor 41010 3 N A Ch 1 Alarm 1 Real 41011 3 N A Ch 1 Alarm 1 Divi...

Page 49: ...MIN 41043 3 N A Ch 1 D2A MAX 41044 3 N A Ch 2 A2D MIN 41045 3 N A Ch 2 A2D MAX 41046 3 N A Ch 2 D2A MIN 41047 3 N A Ch 2 D2A MAX 41048 3 N A CHANNEL STATUS WORD BIT DEFINITION Channel Status Word Bit 0 Alarm 1 Below 1 Alarm 1 Above 0 Bit 1 Alarm 2 Below 1 Alarm 2 Above 0 Bit 2 Alarm 3 Below 1 Alarm 3 Above 0 Bit 3 Alarm 1 Latch 1 Alarm 1 not latch 0 Bit 4 Alarm 2 Latch 1 Alarm 2 not latch 0 Bit 5 ...

Page 50: ...rved Bit 8 Relay 1 Energized 1 no relay 0 Bit 9 Relay 2 Energized 1 no relay 0 Bit 10 Relay 3 Energized 1 no relay 0 Bit 11 15 Reserved TRANSMITTER STATUS WORD BIT DEFINITION Transmitter Status Word Bit 0 Ch 1 Active 1 Ch 1 inactive 0 Bit 1 Ch 2 Active 1 Ch 2 inactive 0 Bit 2 Secure Level 1 no security 0 Bit 3 Marker Tx LED 1 no marker 0 Bit 4 11 Reserved Bit 12 Relay 1 Failsafe 1 normal 0 Bit 13 ...

Page 51: ...ale typical Standard Output Dual three wire 4 20mA current source outputs with fault and overrange indication Maximum loop resistance is 750 ohms with standard 24VDC supply Fault output 0 0 mA for all fault conditions Optional Output Relay MODBUS interface with 3x 5A SPDT programmable alarm relays Dual isolated 4 20mA outputs Single or dual input MODBUS slave interface no relays Temperature Electr...

Page 52: ...Ch1 Ch2 10 0233 Toxic Bridge 10 0233 420 Toxic 4 20mA 10 0233 B4 4 20mA Bridge 10 0233 D4 4 20mA 4 20mA Sensor Head Assembly 10 0247 Toxic or Bridge Direct Type 1 2 10 0247F Toxic Direct Reactive Gas Type 3 4 10 0248 Toxic Sensor Transmitter Type 20 21 10 0248F Toxic S T Reactive Gas Type 22 23 Note Does not include sensor Display 10 0232 GASMAX Display Yellow Enclosure 10 0160 GASMAX Enclosure Se...

Page 53: ...l TB B B TB TB C C C C C C M B elay TB Isolated ual m utput ut ut C ut C ut Isolated m plash Guard low Cell Sensor Head Splash Guard 10 0198 Splash Guard Fits all sensor heads Sensor Head Flow Cell 10 0205 low Cell PT compression fittings 20 0205S Other specify MODBUS Relay Board 10 0234 MODBUS Relays 2000 0135 MODBUS only ISOLATED 4 20mA Board 10 0250 Dual 4 20mA Output ...

Page 54: ...emote Sensor Transmitter TB C for C MB TIB C orPI C for YG or T IC G C C TB m T Remote Sensor Head Assembly 20 0126 Remote Toxic or Bridge Direct Type 5 6 20 0127 Remote Toxic Reactive Gas Type 7 8 Note Does not include sensor Remote Sensor Transmitter Head Assembly 20 0129 Remote Toxic Sensor Transmitter Type 24 25 20 0130 Remote Toxic S T Reactive Gas Type 26 27 Note Does not include sensor ...

Page 55: ...h Y Adapter ibbon to isplay I Power upply Bridge ensor C M CT P T T G TB TB Sensor Head for Y Adapter 10 0247 12 Toxic or Bridge Direct Type 1 2 Sensor head with extended cable 10 0247F 12 Toxic Direct Reactive Gas Type 3 4 ensor head with extended cable Y Adapter 10 1200 Y Adapter for dual local sensor heads ...

Page 56: ...GASMAX II Operation Maintenance Manual Revision 7 0 Page 56 12 DRAWINGS AND DIMENSIONS Figure 12 1 GASMAX Dimensions Figure 12 2 GASMAX Dual Local Sensor Dimensions NPT 2x NPT 2x 12 5 ...

Page 57: ......

Page 58: ...GDS Corp 1245 Butler Road League City TX 77573 409 927 2980 409 927 4180 Fax ww gdscorp com ...

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