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GASMAX EC Operation & Maintenance Manual, Revision 3.5 

Page 3

 

CONTENTS 

1

 

SAFETY INFORMATION  _______________________________________________  8

 

2

 

GENERAL INFORMATION ______________________________________________  9

 

Introduction ________________________________________________________________ 9

 

GASMAX Sensors ____________________________________________________________ 9

 

3

 

SPECIFICATIONS ____________________________________________________  10

 

4

 

INSTALLATION _____________________________________________________  11

 

Locating the GASMAX EC _____________________________________________________ 11

 

Mounting the GASMAX Instrument Enclosure ____________________________________ 11

 

Mounting the GASMAX Remote Sensor Enclosure _________________________________ 12

 

Explosion Proof Installation ___________________________________________________ 12

 

Intrinsically Safe Installation __________________________________________________ 13

 

Connecting Loop Power / Signal Wiring  _________________________________________ 13

 

Local Smart Sensor __________________________________________________________ 14

 

Connecting a Remote Sensor __________________________________________________ 15

 

Initial Setup  _______________________________________________________________ 16

 

5

 

CALIBRATION ______________________________________________________  18

 

Calibration Overview ________________________________________________________ 18

 

Calibration Procedure  _______________________________________________________ 19

 

6

 

OPERATION AND MAINTENANCE ______________________________________  21

 

GASMAX Display Screens _____________________________________________________ 21

 

Data Display Screen _________________________________________________________ 21

 

Trend Display Screen ________________________________________________________ 22

 

Normal Operation  __________________________________________________________ 22

 

Содержание GASMAX EC

Страница 1: ...GDS Corp 2513 Hwy 646 Santa Fe Texas 77510 409 927 2980 409 927 4180 Fax ww gdscorp com Operation and Maintenance Manual GASMAX EC Loop Powered Toxic Gas Monitor ...

Страница 2: ...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 3 5 1 4 15 13 Initial rewrite for GASMAX EC Copyright 2013 GDS Corp All Rights Reserved P N 1200 0852 01 ...

Страница 3: ...12 Intrinsically Safe Installation __________________________________________________ 13 Connecting Loop Power Signal Wiring _________________________________________ 13 Local Smart Sensor__________________________________________________________ 14 Connecting a Remote Sensor__________________________________________________ 15 Initial Setup ________________________________________________________...

Страница 4: ..._________________________________________________ 27 Track Negative ____________________________________________________________________ 27 Temp Compensation _______________________________________________________________ 28 Backup Config ____________________________________________________________________ 28 Restore Config ____________________________________________________________________ 28 Up...

Страница 5: ..._____________________________________________ 32 Relay Test________________________________________________________________________ 32 SYSTEM SECURITY Page ______________________________________________________ 32 Contact Name ____________________________________________________________________ 32 Secure Level ______________________________________________________________________ 32 8 TECHNICIANS ...

Страница 6: ...____________________ 37 Receiving Device and GASMAX Displayed Values Don t Match_______________________ 37 GASMAX Display Blank ______________________________________________________ 37 GASMAX Error Codes ________________________________________________________ 37 10 SPARE PARTS ____________________________________________________ 39 Display Enclosure ______________________________________________...

Страница 7: ...X DATA DISPLAY SCREEN 22 FIGURE 6 3 GASMAX TREND DISPLAY SCREEN 22 FIGURE 6 4 SENSOR REPLACEMENT 24 FIGURE 6 5 SMART SENSOR RECOGNITION SCREEN 24 FIGURE 7 1 MAIN MENU FLOWCHART 26 FIGURE 7 2 SYSTEM CONFIG MENU 27 FIGURE 7 3 SENSOR LIFE TRANSMISSSION FORMAT 28 FIGURE 7 4 ALARM SETTINGS MENU 29 FIGURE 7 5 SENSOR SETTINGS MENU 30 FIGURE 7 6 CLOCK DELAY MENU 31 FIGURE 7 7 CONTRAST MENU 31 FIGURE 7 8 D...

Страница 8: ...ertain 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 Do not paint transmitter or sensor assembly Do not operate the GASMAX EC if its enclosure is damaged or cracked or has missing components Make sure the cover internal PCB s and field wiring are securely in place before app...

Страница 9: ... without opening the enclosure or declassifying the area A battery powered real time clock and event log allows the GASMAX EC to track calibration and alarm events for later recall on the LCD readout GASMAX Sensors For toxic gases the GASMAX EC supports a wide range of electrochemical echem sensors These sensors use chemical reactions to sense the presence of gases such as hydrogen sulfide chlorin...

Страница 10: ...int standard 316 stainless steel optional Dimensions Width 5 4 137 mm Height 8 203 mm Depth 5 127 mm Shipping weight 6 5 pounds 3 kg Approvals CSA Certified Division 1 2 Groups B C D Suitable for explosion proof installations with flame arrestor CSA Certified Division 1 2 Groups A B C D Intrinsically safe when used with IS barrier 10 0263 MTL 7787P or equivalent ATEX Certified EX II 2 G EEx d IIB ...

Страница 11: ... leak and heavier than air gases should be this distance below Even though the GASMAX EC is designed for rugged service sensors should be protected from environmental damage from water snow shock vibration and dirt Mounting the GASMAX Instrument Enclosure The GASMAX EC standard enclosure is a cast aluminum explosion proof NEMA 7 enclosure as shown in Figure 4 1 Figure 4 1 GASMAX EC Explosion Proof...

Страница 12: ...roof Installation GASMAX EC monitors with standard explosion proof sensor heads are certified for use in Class 1 Division 1 hazardous areas Installation in these areas should follow best industry standard practices and all appropriate electrical codes Generally these codes require rigid metal conduit poured seals and other installation elements necessary to ensure safety In all cases GDS Corp reco...

Страница 13: ...ommended for all low power signal runs Connecting Loop Power Signal Wiring To access the GASMAX signal power connections remove the cover on the GASMAX EC explosion proof enclosure Loosen the 2 thumbscrews holding the display assembly in place and remove it Route the power signal wires through the conduit entry and connect to green terminal block TB1 see Fig 4 3 Positive and negative wires are int...

Страница 14: ...the Smart Sensor connector S1 located on the back of the Display Assembly See Fig 4 4 Figure 4 4 Local Smart Toxic Sensor IMPORTANT TOXIC SENSORS ARE SUBJECT TO ACCELERATED DETERIORATION IF POWER IS NOT SUPPLIED WITHIN 3 MONTHS OF SHIPMENT FROM GDS CORP S1 Ribbon to Display S1 Display Assembly Local Toxic Sensor Cable from sensor head connects to S1 on back of display assembly MounƟng Assembly CTR...

Страница 15: ...c sensors should be mounted no more than 15 wire feet from the GASMAX EC display 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 Figure 4 5 GASMAX EC Remote Sensor Wiring TB USE R C A for COMBUSTIBLE CO2 orPID SE NSOR USE S R C...

Страница 16: ... on any barrier The same applies for inductance Capacitance and inductance of field wiring from intrinsically safe equipment to the barrier should be calculated as Ccable 60 pF ft and Lcable 0 2 uH ft and should be included in system calcula tions 4 Selected barriers must be third party approved as intrinsically safe for the application and have Vcc not exceeding Vmax and Isc no exceeding Imax of ...

Страница 17: ...on of front panel LEDs only Sec 6 3 Allow the GASMAX EC to stabilize for at least four hours preferably overnight if possible This will allow the sensor to reach stable equilibrium with respect to environmental conditions such as ambient temperature humidity and barometric pressure as well as applied reference and counter voltages generated by the GASMAX EC electronics At this point the GASMAX EC ...

Страница 18: ...inutes Follow these GASMAX EC 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 calibrat...

Страница 19: ...a flow rate of 0 5 liters minute for standard gases and a flow rate of 1 0 liters minute for highly reactive gases such as chlorine or chlorine dioxide Figure 5 1 Calibration Setup To calibrate a GASMAX EC detector 1 To enter CAL MODE press the DOWN CAL key and within 5 seconds press the EDIT key 2 The screen will display an APPLY ZERO message Using the setup shown in Fig 5 1 apply clean ZERO air ...

Страница 20: ...the regulator and remove the calibration cup At the end of the CAL PURGE delay the GASMAX EC output is re enabled and the unit is fully operational The flow chart shown in Figure 5 2 illustrates the above procedure UP CAL NEXT EDIT labels indicate keystrokes using the magnetic wand ZERO or SPAN calibration will fail if the readings exceed built in limits for maximum allowable zero or minimum allow...

Страница 21: ...de When in user menu display mode use UP and DOWN to select an item EDIT to change an item and NEXT to exit the menu or function and return the GASMAX EC to display mode Activating DOWN CAL followed by EDIT while in display mode initiates calibration mode For the balance of this manual the term press will be used to describe activation of any key via the magnetic wand Data Display Screen The DATA ...

Страница 22: ...hows the current gas reading in direct calibrated engineering units If the reading goes above the Alarm 1 or Alarm 2 values the front panel display LEDs will flash The 4 20mA output current sink will transmit a value that represents the of scale shown onj the display If the sensor malfunctions or is removed the Fault LED will illuminate and the message FAULT will appear on the display screen Alarm...

Страница 23: ...n no longer be calibrated it should be replaced GASMAX EC monitors use GDS Corp type 10 95XX sensors where the XX is the gas type shown in Section 3 The range value should also be specified when ordering replacement sensors For example a replacement H2S sensor for 0 100 ppm would be 10 9515 R0100 To replace a sensor review Fig 6 2 and follow these steps See Fig 6 4 1 Declassify the area or remove ...

Страница 24: ...s installed the Smart Sensor identification screen will appear followed by the ERROR CODE 01 message and the user will be given the opportunity to confirm the new sensor type If the user activates the EDIT key all data stored in the new sensor s database including range tag name cal span value engineering units and alarm levels will replace the current settings Figure 6 5 SMART SENSOR Recognition ...

Страница 25: ...THIS STEP IT CAN BE DAMAGED USE CAUTION WHEN REINSTALLING THE SENSOR HEAD COVER 6 At the GASMAX EC activate the Main Menu open the Sensor Information page and select Install New Sensor This will reset the Sensor Life settings and tell the GASMAX EC that a new sensor is available NOTE If the new sensor is of a different TYPE a number of other settings including input type range cal span value and o...

Страница 26: ...enu GASMAX EC setup variables are stored in non volatile memory and can be modified by the end user to better match a particular application The GASMAX EC 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 ...

Страница 27: ...AL POINTS set the resolution of the LCD readings and may be set for 0 1 or 2 For example ZERO readings for 0 1 2 decimal points displays as 0 0 0 0 00 CAL SPAN VALUE sets the engineering units value of the calibration gas GDS Corp recommends that the calibration gas value be between 25 and 75 of full scale Calibrating at 100 of scale is not recommended READOUT DEADBAND forces low values to continu...

Страница 28: ...TA allows the user to manually upload the entire smart sensor database to the GASMAX EC from the smart sensor CAL MARKER allows the user to set the 4 20mA output value that is transmitted during ZERO and SPAN calibration This setting is limited to between 3ma and 20mA and is a useful way to indicate to a GDS controller that the unit is in CAL MODE TX SENSOR LIFE causes the GASMAX EC 4 20mA output ...

Страница 29: ...int is 20 ppm after tripping at 20 ppm the value must drop below 15 ppm to reset ON DELAY allows entering a maximum 10 second delay before this alarm becomes active This is useful for preventing nuisance alarms caused by brief spikes beyond the set point OFF DELAY allows entering a maximum 120 minute delay before clearing an alarm after the alarm condition is gone This is useful for continuing an ...

Страница 30: ...e reviewed by scrolling with the UP DOWN keys INPUT TYPE indicates what kind of input or sensor the GASMAX EC is configured to accept and is typically pre configured at the factory When installed Smart Sensors upload sensor type and other data to the GASMAX EC and this data may be viewed on the SMART SENSOR information screen NEW SENSOR displays the date when a new sensor was last installed RECENT...

Страница 31: ...etting is 60 seconds Maximum value is 255 seconds CAL PURGE DELAY sets the amount of time from the completion of span calibration until the 4 20mA output signal restarts tracking the sensor output The default setting is 60 seconds and the maximum value is 255 seconds LCD CONTRAST Adjustment Page The LCD Contrast Adjustment allows the display to be set for optimum viewing Figure 7 7 CONTRAST MENU H...

Страница 32: ...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 LEVEL sets LOW HIGH or OFF modes A LOW level allows CAL MODE sensor calibrations but requires the 4 digit Pass Code prior to altering menus HIGH level locks the entire menu database and the CAL Mode until the correct Pass Code is entered LOW...

Страница 33: ...quence WARNING TARGET GAS MONITORING AND ALARM PROCESSING ARE NOT ACTIVE WHILE IN THIS MENU Figure 8 1 XMITTER CONFIG MENU O2 TOXIC when set to YES enables the Oxygen Toxic channel LEL CURRENT is not available in the GASMAX EC OUTPUT ZERO SPAN TRIM provides a way to precisely set the GASMAX EC 4mA and 20mA outputs to compensate for variation in output components These settings are programmed at th...

Страница 34: ... S E N S OR B A L A NC E 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 N S OR V OL T A GE V o l t s 2 0 4 UP DN t o C h a n g e NE X T t o E x i t WA R NI N G Hi g h v o l t a g e ma y d a ma g e s e n s o r WA R NI N G P r e v i o u s C a l i b r a t i o n wi l l b e e r a s e d E D I T t o c o n f i r m NE X T t o e x i t Ga i n U n i t y EDIT EDIT P GA S E T U P Ga...

Страница 35: ...o any value higher than 85 WARNING A FULL CALIBRATION SHOULD ALWAYS BE PERFORMED AFTER ANY CHANGE IN THE PREAMP GAIN SETTING Figure 8 4 PREAMP GAIN SET MENU INPUT TYPE Local Smart Sensors automatically configure Input Type to match sensor requirements However when using remote sensors Input Type must be set manually Input Type is factory preset and should not be changed unless a different TYPE rem...

Страница 36: ...en Carbon Monoxide Ammonia Nitric Oxide Ethylene Oxide Hydrogen Chloride Hydrazine Arsine Sulfur Dioxide Hydrogen Hydrogen Cyanide Phosgene Phosphine Hydrogen Fluoride Nitrogen Dioxide Ozone Chlorine ppm H2S Oxygen ppm CO ppm NH3 ppm NO ppm Eth O2 ppm HCL ppm N2H4 ppm Arsine ppm SO2 ppm H2 ppm HCN ppm COCl2 ppm PH3 ppm HF ppm NO2 ppm Ozone ppm Cl2 ZERO CAL VALUE should always be set to 0 RAW MIN M...

Страница 37: ...be replaced Sensor reading during 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 Receiving Device and GASMAX Displayed Values Don t Match Check that zero and full scale range values match between GASMAX and receiving device controller Use DIAGNOSTICS menu to force GASMAX EC out...

Страница 38: ...ed 05 Span calibration failure Span readings must be within a range of from to 2x the target value For example if the target is 50 ppm the sensor must output at least 25 ppm and no higher than 100 ppm at the current preamp gain setting for calibration to proceed 06 History data file full Clear event log to remove 07 Sensor Channel Data CRC Fail Error in sensor data transfer Contact factory 08 Syst...

Страница 39: ... Splash Guard Flow Cell Base plate with standoffs 10 0262 All Sensor Head 10 0247 Toxic or Bridge Direct Type 1 2 10 0247F Toxic Direct Reactive Gas Type 3 4 Note Does not include sensor Display 10 0232 GASMAX Display Yellow Enclosure 10 0160 GASMAX Enclosure Sensor Head Splash Guard 10 0198 Splash Guard Fits all sensor heads Sensor Head Flow Cell 10 0205 Flow Cell 1 8 NPT compression fittings 20 ...

Страница 40: ... 3 GASMAX EC Remote Direct Sensor Head TB USE R C A for COMBUSTIBLE CO2 orPID SE NSOR USE S R C for OXYGEN or TOXIC GAS SENSOR S R C R C A 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 ...

Страница 41: ...GASMAX EC Operation Maintenance Manual Revision 3 5 Page 41 11 DRAWINGS AND DIMENSIONS ...

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