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Summary of Contents for CTI GG-VL2-CO2
- Page 1 GG-VL2-CO2 CARBON DIOXIDE VENT LINE SENSOR Installation and Operation Manual...
- Page 2 GG-VL2-CO2 Warning Use this product only in the manner described in this manual. If the equipment is used in a manner not specified by Calibration Technologies, the protection provided by the equipment may be impaired. This equipment should be installed by qualified personnel.
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Page 3: Table Of Contents
GG-VL2-CO2 Table of Contents General description ........4 Installation ............4 Locating the sensor ........4 Installation guidelines ......... 5 Wiring ............6 Operation ............7 Start-up ............7 Calibration ........... 7 Maintenance ........... 10 Troubleshooting ..........11 Specifications ..........11 Warranty ............ -
Page 4: General Description
General Description Installation Locating the sensor The GG-VL2-CO2 sensor is a +24 VDC, three-wire, 4/20 mA vent line sensor for carbon dioxide. It provides Note: The ½” nipple of the supplied mounting kit an industry standard linear 4/20 mA output signal should be welded to the relief header to allow airflow compatible with most gas detection systems and PLCs. -
Page 5: Installation Guidelines
GG-VL2-CO2 Installation Guidelines: • Always assume system could discharge at any moment. Stay clear of discharge path and have escape route planned. • Make sure carbon dioxide does not discharge onto sensor assembly or personnel working on sensor (i.e. mount sensor opposite side of discharge). -
Page 6: Wiring
GG-VL2-CO2 Wiring Electrical wiring must comply with all applicable codes. Electrical Power: 24 VDC regulated, 80 mA. Output: Linear 4/20 mA output. Monitoring equipment may have a maximum input impedance of 700 ohms. Cable Recommendation: 20/3 shielded cable (General Cable C2525A or equivalent). Length of cable to sensor should be no greater than 1,500 feet. -
Page 7: Operation
Calibration • Adjust the zero pot until the sensor outputs 40 The GG-VL2-CO2 sensor comes factory calibrated mVdc from Test [-] to Test [+] (see Figure 2). and should require only minimal adjustments after installation. Calibration should be performed every six months. - Page 8 GG-VL2-CO2 Span Calibration: If span adjustment is required, use the following procedure (see Figure 2): • Unscrew calibration port cover and connect cal gas hose to hose barb fitting. • Press the CAL switch once to enter cal mode. • Apply 5% CO2 span gas at 0.5 - 0.8 L/min.
- Page 9 GG-VL2-CO2 Sensor element assembly Calibration port Unscrew cap to apply calibration gas Calibration switch Sensor cable plug Push to enter cal mode Figure 2: Transmitter and sensor assembly...
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Page 10: Maintenance
GG-VL2-CO2 Maintenance Sensor Replacement: (part #: GG-VL2-CO2-RS) When the sensor becomes faulty, a replacement The GG-VL2-CO2 was designed for long life and sensor element can be obtained from Calibration minimal maintenance. For proper operation, it is Technologies. essential that the calibration schedule be adhered to. -
Page 11: Troubleshooting
GG-VL2-CO2 Specifications Troubleshooting Sensor Fault: (0.5 mA signal output) Input Power: +24 VDC, 60 mA Indications: (any or all) Detection Principle: Infrared (NDIR dual beam) • Red LED on transmitter lit. Detection Method: Diffusion Gas: Carbon dioxide (CO2) • Voltage signal at testpoints is 5 mVdc (.5 mA Range: 0-5% CO2 (50,000 ppm) with 1% CO2 output). - Page 12 GG-VL2-CO2...
- Page 13 GG-VL2-CO2...
- Page 14 GG-VL2-CO2...
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Page 15: Warranty
No goods shall be returned to CTI until receipt by the buyer of shipping instructions from CTI; and c) the right of CTI to require that the buyer provide proof of purchase such as the original invoice, bill of sale or packing slip to establish that the product is within the warranty period. - Page 16 GG-VL2-CO2-DOC1-1 20180131 ctiengineering.com | 866-394-5861...
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