Critical Environment Technologies GEM-II Operation Manual Download Page 23

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Rev. E | 2014.10

GEM-II - Operation Manual

6.1.2 Wiring Example 2

Wiring Example 2

24 VDC

GND

SIGNAL

120 VAC

Controller

GEM-II

Power

Supply

6.1.3 Wiring Example 3 - INCORRECT

24 VAC

120 VAC

Wiring Example 3

INCORRECT

24 VAC

GND

SIGNAL

GND

Controller

GEM-II

Summary of Contents for GEM-II

Page 1: ...Operation Manual www critical environment com GEM IISelf Contained Gas Detector Rev E 2014 10...

Page 2: ...Channel Controller 11 2 3 3Type D Dual Channel 12 2 3 4Type E Dual Channel 13 3 INSTRUMENT SPECIFICATIONS 13 3 1Technical Specifications 13 3 2 Standard Enclosure Dimensions 16 3 3Watertight Enclosur...

Page 3: ...tem Installation 29 6 7 1 LowVoltage Power 29 6 7 2Wiring to Remote Sensor 30 6 7 3Voltage to Remote Sensors 30 6 7 4 Relay Connections 30 6 8 Installation Examples 31 6 8 1Type A with Internal Sensor...

Page 4: ...the Null Zero Value 49 8 4 3 Calibrating the Span Gas 50 8 5 Calibrating Second Internal Sensor 51 8 6 Calibrating Remote Sensor 51 8 6 1 Setting Span GasValue for Remote Sensor 51 8 6 2 Calibrating...

Page 5: ...o instructions indicated in this manual This instrument should be inspected and calibrated regularly by a qualified and trained technician For more information refer to Sections 8Calibration and 10Mai...

Page 6: ...n any way This instrument is only to be used for purposes stated herein The manufacturer is not liable for auxiliary interfaced equipment or consequential damage Due to ongoing research development an...

Page 7: ...as we cannot be held responsible for any damage incurred during shipping to our facility 1 4 Copyrights This manual is subject to copyright protection all rights are reserved Under international and...

Page 8: ...the manufacturer reserves the right to make changes at any time without notice Revised copies of this manual can be obtained by contacting CETCI or visiting www critical environment com Should you de...

Page 9: ...nce push button audible time delay field settable relay time delays and two alarm relays In either system the LED lights provide visual indication of the status of each channel Int internal sensor Ext...

Page 10: ...M II Operation Manual Rev E 2014 10 2 3 Model Designations 2 3 1 Type A Single Channel Choices for GEM A One integral electrochemical sensor NOTES Optional LED digital display is shown in the photo Op...

Page 11: ...M B One remote catalytic or solid state sensor One remote LPT A or LPT series analog transmitter NOTES Optional LED digital display is shown in the photo Wiring requirements 3 conductor 18 gauge to re...

Page 12: ...state sensor Channel 2 One integral electrochemical sensor Channel1 PLUS one remote LPT A or LPT series analog transmitter Channel 2 NOTES Optional LED digital display is shown in the photo Wiring req...

Page 13: ...PECIFICATIONS 3 1 Technical Specifications GASTYPE Carbon Monoxide CO Combustible Gases catalytic Hydrogen H2 Methane CH4 Propane C3 H8 Nitrogen Dioxide NO2 Nitric Oxide NO Oxygen O2 Refrigerants soli...

Page 14: ...r shielded VAC four conductor shielded Circuit Analog design with microprocessor and user settable time delays accessible with DIP switches on circuit board Fuse Automatic resetting thermal INPUT OUTP...

Page 15: ...Also known as minimum run time Low alarm relay 10 minutes High alarm relay not available 10 minutes NOTES Time delays can be changed by user Reference Section 7Operation DIP switches are still used t...

Page 16: ...e without notice GEM II Operation Manual Rev E 2014 10 CERTIFICATION CSA Certified UL Certified 3 2 Standard Enclosure Dimensions 3 3 Watertight Enclosure Dimensions 5 25 133 mm 2 625 67 mm 6 75 172 m...

Page 17: ...al ResponseTime 30 seconds to 90 of signal response OperatingTemperature 0 C to 50 C 32 F to 120 F Repeatability 10 of set point Life Span 2 years in air under normal conditions Nitrogen Dioxide NO2 T...

Page 18: ...Refrigerants Type Solid state ResponseTime 120 seconds to 90 of signal response OperatingTemperature 0 C to 40 C 32 F to 104 F LongTerm Drift 5 signal loss month at ambient temperatures Repeatability...

Page 19: ...Optional LED digital display LED Sensor Indicators Indicates Channel 1 or Channel 2 Door Latch Secures door LED Indicators Indicates Power Fail Door Screw Secures door Gas Alarm LED Indicates High and...

Page 20: ...icators Indicates Channel 1 or Channel 2 Audible Alarm Watertight audible alarm silence push button LED Indicators Indicates Power Fail Gas Alarm LED Indicates High and Low alarm levels Silence Button...

Page 21: ...ayout NUMBER FEATURE FUNCTION Dip Switches For access to time delays Dry Contact Relays For Low High Alarm Jumpers For calibrations other service set up functions WiringTerminal Pluggable wiring termi...

Page 22: ...C Ground Referenced use terminals 12 13 This is now a HalfWave device in this configuration Please observe polarity The Ground referenced AC must be connected to terminal 12 J2 open Factory default FO...

Page 23: ...otice 23 Rev E 2014 10 GEM II Operation Manual 6 1 2 Wiring Example 2 Wiring Example 2 24 VDC GND SIGNAL 120 VAC Controller GEM II Power Supply 6 1 3 Wiring Example 3 INCORRECT 24 VAC 120 VAC Wiring E...

Page 24: ...notice GEM II Operation Manual Rev E 2014 10 6 1 4 Wiring Example 4 Wiring Example 4 24 VDC GND SIGNAL GND 24 VDC 120 VAC Controller GEM II Power Supply 6 1 5 Wiring Example 5 J2 Removed 120 VAC 24 VA...

Page 25: ...ESTED MOUNTING HEIGHT Carbon Monoxide CO Gas engine exhaust 4 6 ft from the floor Nitric Oxide NO Diesel engine exhaust Nitrogen Dioxide NO2 Diesel engine exhaust Sulphur Dioxide SO2 All 6 from the fl...

Page 26: ...ation Manual Rev E 2014 10 6 3 Standard Enclosure Mounting Components 6 3 1 Enclosure Base NUMBER FEATURE Molded in mounting bracket Conduit Entry Alternative mounting holes 6 3 2 Enclosure Top NUMBER...

Page 27: ...v E 2014 10 GEM II Operation Manual 6 3 3 Enclosure Bottom NUMBER FEATURE Molded in mounting bracket Conduit Entry Alternative mounting holes 6 4 Remote Sensor Housing Catalytic or solid state sensor...

Page 28: ...s reserved Data subject to change without notice GEM II Operation Manual Rev E 2014 10 6 5 Wiring Connections 6 5 1 Types A B and D 6 5 2 Type E Has a sticker placed over area that says SeeWiring Remo...

Page 29: ...nnected GEMType B and type D will accommodate one remote sensor or analog transmitter To connect one remote sensor or analog transmitter to a GEM use terminals 9 10 11 and observe polarity 6 7 System...

Page 30: ...remote analog transmitters should measure approximately 24VDC nominal This voltage is factory set at time of manufacturing If these voltages are not attained after installation the wrong gauge wire ma...

Page 31: ...nd the length of time the gas alarms exist is dependent upon the length of time since the unit was last powered up and the state of the environment it is installed in After warm up only the green powe...

Page 32: ...igital display 6 8 2 Type B with Remote Sensor or Analog Transmitter Standard electrical junction box must be supplied by installer Remote sensor Conduit and 3 conductor wire to remote sensor supplied...

Page 33: ...s so the sensor should be installed 6 from the floor or near the most likley are to leak 6 8 3 Type D with One Internal One Remote Sensor GEMType D is a controller with one integral electrochemical se...

Page 34: ...nt the controller will indicate fail condition on the front door by illumination of the red fail LED At this point both system relays will have reversed state de energized and anything connected to th...

Page 35: ...hes then the High alarm LED will flash indicating the time delay has been activated and the high alarm relay will not de energize until the delay has timed out Once the high alarm relay has de energiz...

Page 36: ...utput when jumper J6 is set to the resting position 1 is 4 0VDC Attach the meter leads to the two test points TP 1 TP 2 located just below the high alarm relay RLV2 on the main circuit board Set the m...

Page 37: ...as alarm condition exists The internal audible alarm normally activates with a pulsing tone when a fault condition exists A fault condition could consist of any of the following Remote catalytic or so...

Page 38: ...sor 7 Adjust High Gas Alarm DescendingValue 2 Internal Sensor 8 Enable Disable Current Output 2 Internal Sensor 9 Setting Span GasValue 3 External Sensor 2 Perform Zero Null Calibration 3 External Sen...

Page 39: ...actory default alarm set points Default set points are as follows SENSOR LOW ALARM HIGH ALARM RANGE Carbon Monoxide CO 25 ppm 100 ppm 200 ppm Nitric Oxide NO 35 ppm 50 ppm 100 ppm Nitrogen Dioxide NO2...

Page 40: ...ltage reference of 0 4VDC Reference the tables in Section 7 7TimeDelaysforRelayOperations Move the jumper on the lower jumper bank J6 from its resting position P 1 and place it on the appropriate jump...

Page 41: ...VOLTAGE HIGH ALARM SETVOLTAGE CO 0 200 ppm 25 ppm 0 50VDC 100 ppm 2 00VDC CO 0 200 ppm 35 ppm 0 70VDC 200 ppm 4 00VDC NO2 0 10 ppm 0 7 ppm 0 28VDC 1 0 ppm 0 40VDC NO2 0 10 ppm 2 0 ppm 0 8VDC 5 0 ppm 2...

Page 42: ...as you change them to suit your application If the GEM does not have a digital display you will require a digital volt meter set to volts DC one decimal point The following tables are a guideline to...

Page 43: ...ual VOLT READING ATTEST POINTS cont TIME DELAY IN MINUTES cont 0 44 2 2 0 46 2 3 0 48 2 4 0 50 2 5 0 52 2 6 0 54 2 7 0 56 2 8 0 58 2 9 0 60 3 0 0 62 3 1 0 64 3 2 0 66 3 3 0 68 3 4 0 70 3 5 0 72 3 6 0...

Page 44: ...n has been achieved use the UP or DOWN push buttons to make changes Changes can be viewed on the LED digital display if the GEM is equipped with one If the GEM is not equipped with a digital display c...

Page 45: ...P push button will display the temperature in Celsius and the output to test points TP 1 and TP 2 is 4 0V If the DOWN push button is pressed the temperature is displayed in Fahrenheit and the output t...

Page 46: ...The display can indicate the gas type only with no numerical value for some applications FUNCTION JUMPER SETTING Switch digital display ON Jumper J3 bridge P2 P3 Switch digital display OFF Jumper J3 b...

Page 47: ...service person is confident of air quality and is careful do not exhale in the direction of the Oxygen sensor being serviced while span adjusting Oxygen in the breathing environment can be used as a...

Page 48: ...s achieved at the transmitter using the procedure indicated in the operation manual provided with it Required Equipment Digital multi meter Calibration kit Calibration gases Users can order the calibr...

Page 49: ...the sensor 8 4 Calibrating the Internal Sensor 8 4 1 Setting Span Gas Value internal sensor Step 1 Move jumper on J6 to position 2 and move jumper on J7 to position 2 The audible alarm beeps once for...

Page 50: ...and remove the zero air or Nitrogen 8 4 3 Calibrating the Span Gas internal sensor Step 1 Attach regulator to cylinder of span gas Step 2 Insert the calibration adapter into the sensor opening in the...

Page 51: ...r on J7 to position 2 Audible alarm beeps once for confirmation The system is now waiting for the user to set the desired value Step 2 Attach digital multi meter leads to test pointsTP 1 andTP 2 Refer...

Page 52: ...itions and remove the zero air or Nitrogen 8 6 3 Calibrating the Span Gas remote catalytic or SS sensor Step 1 Attach regulator to cylinder of span gas Step 2 Attach flow adapter and open regulator va...

Page 53: ...position 3 The audible will beep once for confirmation The system is now starting the zero calibration stabilization time 30 seconds Step 2 Attach digital multi meter leads to test pointsTP 1 andTP 2...

Page 54: ...to position 3 and the jumper from J7 to position 3The audible will beep once for confirmation The system is now starting the zero calibration stabilization time 30 seconds Step 2 Attach digital multi...

Page 55: ...tion The audible will beep twice when the calibration begins The audible beeps three times indicating the procedure is finished 2 minutes Step 4 Move jumpers from J6 J7 back to their respective restin...

Page 56: ...CK1 9 2 Metal Protective Guard The metal protective guard is heavy duty metal protective guard to help protect against abrasive damage theft and vandalism to the transmitters This is an added prevent...

Page 57: ...tion Manual 10 MAINTENANCE The GEM series system requires virtually no maintenance other than regular calibration of the integral and or remote sensors and ensuring that excess water or dust is not so...

Page 60: ...ntageWay Delta BC V4G 1M3 Canada Toll Free 1 877 940 8741 Tel 1 604 940 8741 Fax 1 604 940 8745 www critical environment com 2014 Critical EnvironmentTechnologies Canada Inc All rights reserved Data i...

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