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Summary of Contents for Critical Environment Technologies GEM-II
- Page 1 Operation Manual Rev. E | 2014.10 GEM-II Self Contained Gas Detector www.critical-environment.com...
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Page 2: Table Of Contents
GEM-II - Operation Manual Rev. E | 2014.10 Table of ConTenTs 1 POLICIES ........................5 1.1 Important Note ......................5 1.2 Warranty Policy ......................6 1.3 Service Policy .........................6 1.4 Copyrights ........................7 1.5 Disclaimer ........................7 1.6 Revisions ........................8 2 INTRODUCTION ..................... 9 2.1 General Description .......................9... - Page 3 Rev. E | 2014.10 GEM-II - Operation Manual 6.1.3 Wiring Example 3 - INCORRECT ..................6.1.4 Wiring Example 4 ......................6.1.5 Wiring Example 5 (J2 Removed) ................... 6.1.6 Wiring Example 6 (J2 Removed) ................... 6.2 Sensor Mounting Heights ....................25 6.3 Standard Enclosure Mounting Components ..............26 6.3.1 Enclosure Base ......................
- Page 4 GEM-II - Operation Manual Rev. E | 2014.10 7.9 Latching Relay Functions .....................45 7.10 LED Digital Display .....................46 8 CALIBRATION ......................47 8.1 Calibration Specifications .....................47 8.1.1 Gas ..........................8.1.2 Exception ........................8.1.3 Regulators & Flow ......................8.1.4 Adapters ........................8.2 Calibrating Sensors ......................48 8.2.1 Calibration Frequency ....................
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Page 5: Policies
Rev. E | 2014.10 GEM-II - Operation Manual 1 PolICIes 1.1 Important note Read and understand this manual prior to using this instrument. Carefully read the warranty policy, service policy, notices, disclaimers and revisions on the following pages. This product must be installed by a qualified electrician or factory trained technician and according to instructions indicated in this manual. -
Page 6: Warranty Policy
• Supply: 24 V (nominal, 50 or 60 Hz) • Certified for electrical shock and electrical fire hazard only Critical Environment Technologies Canada Inc. (CETCI), also referred to as the manufacturer, warrants this instrument, (excluding sensors, battery packs, batteries, pumps and filters) to be free from defects in materials and workmanship for a period of two years from the date of purchase from our facility. -
Page 7: Copyrights
Rev. E | 2014.10 GEM-II - Operation Manual Prior to shipping equipment to CETCI, contact our office for an RMA #. All returned goods must be accompanied with an RMA number. If CETCI is to do the repair work, you may send the instrument, prepaid, to: Attention: Service Department Critical Environment Technologies Canada Inc. -
Page 8: Revisions
GEM-II - Operation Manual Rev. E | 2014.10 1.6 Revisions This manual was written and published by CETCI. The manufacturer makes no warranty or representation, expressed or implied including any warranty of merchantability or fitness for purpose, with respect to this manual. -
Page 9: Introduction
GEM-II - Operation Manual 2 InTRoDUCTIon 2.1 General Description Thank you for purchasing our GEM-II self-contained gas detector. The GEM series gas detection systems are economical, self-contained, gas detectors for non- hazardous (non-explosion rated) commercial applications. They are available in two basic configurations: one sensor models and two sensor models. -
Page 10: Model Designations
GEM-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. Opening for integral sensor (example: CO) to monitor diffused air and gas. -
Page 11: Type B - Single Channel Controller
Rev. E | 2014.10 GEM-II - Operation Manual 2.3.2 Type B – Single Channel Controller Choices for GEM-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. -
Page 12: Type D - Dual Channel
GEM-II - Operation Manual Rev. E | 2014.10 2.3.3 Type D – Dual Channel Choices for GEM-D: • One integral electrochemical sensor (Channel1) PLUS one remote catalytic or solid state sensor (Channel 2). • One integral electrochemical sensor (Channel1) PLUS one remote LPT-A or LPT series analog transmitter (Channel 2). -
Page 13: Type E- Dual Channel
Rev. E | 2014.10 GEM-II - Operation Manual 2.3.4 Type E – Dual Channel Choices for GEM-E: • Two integral electrochemical sensors (Channel 1 & 2) NOTES: Optional LED digital display is shown in the photo. Opening for TWO integral sensors to monitor diffused air and gas. - Page 14 GEM-II - Operation Manual Rev. E | 2014.10 MECHANICAL Standard Enclosure General purpose PVC Standard Weight 600 g (1.2 lb) Standard Size 5.3” x 6.8” x 2.6” (135 mm x 173 mm x 66 mm) Watertight Enclosure Water / dust tight polycarbonate Watertight Weight 700 g (1.4 lb)
- Page 15 Rev. E | 2014.10 GEM-II - Operation Manual Integral piezo audible alarm rated 80 dB @ 10’ c/w door mounted silence push-button. Audible NOTES: Audible alarm & silence push-button are right side mounted on water tight enclosure. Time Delays Delay “ON” (on make),...
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Page 16: Standard Enclosure Dimensions
GEM-II - Operation Manual Rev. E | 2014.10 CERTIFICATION Certified Certified 3.2 standard enclosure Dimensions 2.625” (67 mm) 6.75” (172 mm) 3.3 Watertight enclosure Dimensions 4.0” (102 mm) 7.13” (181 mm) 4.38” (102 mm) © 2014 All rights reserved. Data subject to change without notice. -
Page 17: Sensor Specifications
Rev. E | 2014.10 GEM-II - Operation Manual 4 sensoR sPeCIfICaTIons 4.1 Common sensor specifications Carbon Monoxide (CO) Type Electrochemical Response Time <30 seconds to 90% of signal response Operating Temperature 0°C to 50°C (32°F to 120°F) Repeatability ± 10% of set point... -
Page 18: Remote Sensor Specifications
GEM-II - Operation Manual Rev. E | 2014.10 Temperature (°C or °F) Range -20°C to 40°C (-4°F to 104°F) 4.2 Remote sensor specifications 1. Remote sensor module: The remote sensor housing accommodates one catalytic or one solid- state sensor. 2. Any 4-20 mA analog transmitters manufactured by CETCI (LPT-A or LPT series). -
Page 19: Features & Functions
Rev. E | 2014.10 GEM-II - Operation Manual 5 feaTURes & fUnCTIons 5.1 standard exterior enclosure NUMBER FEATURE FUNCTION Digital Display Optional LED digital display ➊ LED Sensor Indicators Indicates Channel 1 or Channel 2 ➋... -
Page 20: Watertight Exterior Enclosure
GEM-II - Operation Manual Rev. E | 2014.10 5.2 Watertight exterior enclosure NUMBER FEATURE FUNCTION Digital Display Optional LED digital display ➊ LED Sensor Indicators Indicates Channel 1 or Channel 2 ➋ Watertight audible alarm & silence push Audible Alarm ➌... -
Page 21: Interior System Layout
Rev. E | 2014.10 GEM-II - Operation Manual 5.3 Interior system layout NUMBER FEATURE FUNCTION Dip Switches For access to time delays ➊ Dry Contact Relays For Low & High Alarm ➋ For calibrations & other service set-up Jumpers ➌... -
Page 22: Installation
GEM-II - Operation Manual Rev. E | 2014.10 6 InsTallaTIon 6.1 aC and DC Wiring The GEM is a low voltage powered gas detector. All wiring should be run within properly grounded (earth or safety) conduit. Signal output and supply should be in shielded cable. -
Page 23: Wiring Example 2
Wiring Example 2 Rev. E | 2014.10 GEM-II - Operation Manual 6.1.2 Wiring Example 2 Controller GEM-II 24 VDC SIGNAL Power 120 VAC Supply Wiring Example 3 INCORRECT 6.1.3 Wiring Example 3 - INCORRECT GEM-II Controller 24 VAC SIGNAL 120 VAC 24 VAC ©... -
Page 24: Wiring Example 4
Wiring Example 4 GEM-II - Operation Manual Rev. E | 2014.10 6.1.4 Wiring Example 4 Controller GEM-II 24 VDC SIGNAL 24 VDC Power 120 VAC Supply Wiring Example 5 6.1.5 Wiring Example 5 (J2 Removed) GEM-II Controller 24 VAC SIGNAL... -
Page 25: Wiring Example 6 (J2 Removed)
Wiring Example 6 Rev. E | 2014.10 GEM-II - Operation Manual 6.1.6 Wiring Example 6 (J2 Removed) Controller GEM-II 24 VAC SIGNAL 24 VDC Recti ed 24 VAC 120 VAC 6.2 sensor Mounting Heights APPLICATIONS / TYPES SUGGESTED MOUNTING HEIGHT... -
Page 26: Standard Enclosure Mounting Components
GEM-II - Operation Manual Rev. E | 2014.10 6.3 standard enclosure Mounting Components 6.3.1 Enclosure Base NUMBER FEATURE Molded-in mounting bracket ➊ Conduit Entry ➋ Alternative mounting holes ➌ 6.3.2 Enclosure Top ... -
Page 27: Enclosure Bottom
Rev. E | 2014.10 GEM-II - Operation Manual 6.3.3 Enclosure Bottom NUMBER FEATURE Molded-in mounting bracket ➊ Conduit Entry ➋ Alternative mounting holes ➌ 6.4 Remote sensor Housing Catalytic or solid state Wiring: sensor breathes 1. -
Page 28: Wiring Connections
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 See Wiring. Remove to install J2. © 2014 All rights reserved. Data subject to change without notice. -
Page 29: Important Notes For Wiring
Rev. E | 2014.10 GEM-II - Operation Manual 6.6 Important notes for Wiring GEM is a low voltage powered gas detector. If providing VAC power, use terminals 12 & 13. If providing VDC power, use terminals 12 & 13 and observe polarity. Reference Section 6.5 Wiring Connections. -
Page 30: Wiring To Remote Sensor
GEM-II - Operation Manual Rev. E | 2014.10 6.7.2 Wiring to Remote Sensor Three-conductor, 16 - 18 gauge, stranded wire is required between the control panel and the remote solid-state sensor (reference Section 6.8 Installation Examples, Type D with Onboard &... -
Page 31: Installation Examples
Rev. E | 2014.10 GEM-II - Operation Manual Upon application of power, the green LED light indicator(s) will illuminate and the LED between Sen-1 & Sen-2 will be blinking but all alarms are disabled for 2 minutes for a system warm up period. -
Page 32: Type B With Remote Sensor Or Analog Transmitter
GEM-II - Operation Manual Rev. E | 2014.10 NOTES for Type A with Enclosed Transformer: Enclosed transformer shown in this photo is an optional accessory. Conduit stubs shown in this photo are not supplied. This photo is representative of just one way to install transformer. -
Page 33: Type D With One Internal & One Remote Sensor
Rev. E | 2014.10 GEM-II - Operation Manual NOTES for Type B with Remote Sensor or Analog Transmitter: This photo shows the optional LED digital display. In this installation, the remote sensor is for heavier than air gases such as propane or a solid state refrigerant gas so the sensor should be installed 6”... -
Page 34: Type E With Two Internal Sensors
GEM-II - Operation Manual Rev. E | 2014.10 NOTES for Type D with One Internal & One Remote Sensor: This photo shows the optional LED digital display. In this installation, the remote sensor is for heavier than air gases such as propane or a solid state refrigerant gas so the sensor should be installed 6”... -
Page 35: Test Functions
Rev. E | 2014.10 GEM-II - Operation Manual In the event of a gas build up beyond the preset low alarm trip point, the CH-1-Int. LED (outer door right side) illuminates, the “Low” alarm level LED (red - outer door left side) illuminates and the low alarm relay de-energizes activating anything controlled by it. -
Page 36: Dip Switch Package
GEM-II - Operation Manual Rev. E | 2014.10 If a longer test sequence is desired, hold down the “UP” push-button for 10-seconds to activate the low alarm relay, high alarm relay, low alarm LED, and high alarm LED for 15-minutes. -
Page 37: Internal Audible Alarm Operation
Rev. E | 2014.10 GEM-II - Operation Manual NOTES: 1. Dip switches in the “up” position are “on”. 2. Time delay durations can be changed by user. 3. Fixed delay durations indicated above are factory default settings. 7.4 Internal audible alarm operation If DIP switch “5”... - Page 38 GEM-II - Operation Manual Rev. E | 2014.10 J6 LOWER J7 UPPER FUNCTION DESIRED JUMPER BANK JUMPER BANK Resting (Jumpers for the Upper Bank, J7 are disabled) Setting Span Gas Value 2 (Internal Sensor) Perform Zero (Null) Calibration 2 (Internal Sensor)
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Page 39: Adjusting Alarm Set Points
Rev. E | 2014.10 GEM-II - Operation Manual J7 - 9 J7 - 8 J7 - 7 J7 - 6 Upper bank jumpers set (J7). This bank J7 - 5 of jumpers allows specific functions J7 - 4 for internal and external sensors. The... - Page 40 GEM-II - Operation Manual Rev. E | 2014.10 Reference table in Section 7.5 Jumpers. If the GEM has been equipped with an LED digital display, set values according to what is displayed. If the GEM has been supplied without a digital display, you will require a digital multi-meter.
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Page 41: Voltage Reference Table For Alarm Settings
Rev. E | 2014.10 GEM-II - Operation Manual Alarm settings for GEM detectors are voltage settings. The range of 0 - 4.0 VDC is equal to the full measurement range of the sensor. E.g. HVAC CO sensor has a standard measurement range of 0-200 ppm. -
Page 42: Time Delays For Relay Operations
GEM-II - Operation Manual Rev. E | 2014.10 7.7 Time Delays for Relay operations GEM offers a wide range of time delay settings that are user configurable. If the GEM has been equipped with the LED digital display option, read the values on the display as you change them to suit your application. - Page 43 Rev. E | 2014.10 GEM-II - Operation Manual VOLT READING AT TEST POINTS cont’ TIME DELAY IN MINUTES cont’ 0.44 0.46 0.48 0.50 0.52 0.54 0.56 0.58 0.60 0.62 0.64 0.66 0.68 0.70 0.72 0.74 0.76 0.78 0.80 10.0 11.0 12.0...
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Page 44: Procedure For Setting Time Delays
GEM-II - Operation Manual Rev. E | 2014.10 VOLT READING AT TEST POINTS cont’ TIME DELAY IN MINUTES cont’ 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 7.7.1 Procedure for Setting Time Delays Move jumper from resting position (position-1) on lower bank jumper set (J6) to position-4. This is the system configuration position. -
Page 45: Temperature Display - Unit Of Measure
Rev. E | 2014.10 GEM-II - Operation Manual FUNCTION UPPER JUMPER BANK “J7” Low alarm “ON” time delay Low alarm “OFF” time delay High alarm “ON” time delay Audible alarm “ON time delay 7.8 Temperature Display - Unit of Measure The GEM systems all have an “on board”... -
Page 46: Led Digital Display
GEM-II - Operation Manual Rev. E | 2014.10 Once the desired latching or non-latching function has been achieved, move jumper back to position-1 on upper jumper bank J7 and move jumper back to position-1 on lower jumper bank J6. At that point, all new settings will be written to the EEPROM. -
Page 47: Calibration
Rev. E | 2014.10 GEM-II - Operation Manual 8 CalIbRaTIon 8.1 Calibration specifications 8.1.1 Gas Calibration span gases should be at least ± 5% accuracy and have a current date stamp. Gas generators should have a current dated cell installed. Service personnel should flow zero emissions air or 20.9% volume Oxygen (O... -
Page 48: Calibrating Sensors
GEM-II - Operation Manual Rev. E | 2014.10 8.2 Calibrating sensors 8.2.1 Calibration Frequency • Parking garage detectors: Once every 12 months • OHS applications: Once every 6 months (OHS: Occupational Health & Safety) • Sensor targeting gases with very low TLVs: Chlorine (Cl ), Ozone (O ), etc. -
Page 49: Calibrating The Internal Sensor
Rev. E | 2014.10 GEM-II - Operation Manual CALIBRATION SPAN GAS VALUE / 50% OF RANGE SENSOR RANGE = % OF RANGE e.g. 100 ppm / 200 ppm = 50% of 4.0 VDC = 2.0 VDC Therefore the required voltage setting to calibrate with 100 ppm is 2.0 VDC. -
Page 50: Calibrating The Span Gas
GEM-II - Operation Manual Rev. E | 2014.10 Step 2: Move jumper on J6 to position-2 and move jumper on J7 to position-3. The audible alarm beeps once for confirmation. The system is now starting the zero calibration stabilization time (30-seconds). -
Page 51: Calibrating Second Internal Sensor
Rev. E | 2014.10 GEM-II - Operation Manual Step 5: Move jumpers from J6 & J7 back to their respective resting positions and remove the span gas. 8.5 Calibrating second Internal sensor Calibration of the second internal sensor has only one difference from the first internal sensor calibration. -
Page 52: Calibrating The Span Gas
GEM-II - Operation Manual Rev. E | 2014.10 Step 2: Move jumper on J6 to position-3 and move jumper on J7 to position-3. The audible alarm beeps once for confirmation. The system is now starting the zero calibration stabilization time (30 seconds). -
Page 53: Calibrating 4-20 Ma For Incoming Analog Transmitter
Rev. E | 2014.10 GEM-II - Operation Manual 8.7 Calibrating 4-20 ma for Incoming analog Transmitter NOTE: The GEM is configured at the factory and should not require this type of calibration unless it is not functioning properly. Specialized equipment is required; only perform these functions after consulting the factory. -
Page 54: Using A Cetci Analog Transmitter To Calibrate The Null
GEM-II - Operation Manual Rev. E | 2014.10 twice when the calibration begins. The audible beeps three times indicating the procedure is finished (2 minutes). Step 3: Move jumpers from J6 & J7 back to their respective resting positions and remove the current source. -
Page 55: Forcing Calibration
Rev. E | 2014.10 GEM-II - Operation Manual At the GEM: Move jumper from J6 to position-3 and the jumper from J7 to position-2. Using the UP and DOWN push-buttons, set the voltage to 2.00 VDC. Step 2: Now, move the jumper from J6 to position-3 and the jumper from J7 to position-4. The audible will beep once for confirmation. -
Page 56: Accessories
GEM-II - Operation Manual Rev. E | 2014.10 9 aCCessoRIes 9.1 Calibration Kit Calibration kits and gases are available from the CETCI factory. Many gases are carried in inventory but not all. Check with any CETCI authorized distributor for availability of specific gas types. -
Page 57: Maintenance
Rev. E | 2014.10 GEM-II - Operation 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 somehow entering the enclosure and physically damaging the circuit board or internal components. - Page 58 GEM-II - Operation Manual Rev. E | 2014.10 noTes © 2014 All rights reserved. Data subject to change without notice.
- Page 59 Rev. E | 2014.10 GEM-II - Operation Manual noTes © 2014 All rights reserved. Data subject to change without notice.
- Page 60 Critical Environment Technologies Canada Inc. Unit 145, 7391 Vantage Way, 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 GEM20141003-E © 2014 Critical Environment Technologies Canada Inc. All rights reserved. Data in this publication may change without notice.
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