Related Manuals for GDS Corp GASMAX LX
Summary of Contents for GDS Corp GASMAX LX
- Page 1 Operation and Maintenance Manual GASMAX LX Single Channel 2-Wire Gas Monitor GDS Corp 1245 Butler Road League City, Texas 77573 409-927-2980 409-927-4180 (Fax) www.gdscorp.com...
- Page 2 WALL TO COMPLY WITH THE HAZARDOUS LOCATION RATING OF THIS PRODUCT DANGER DANGER: THE GDS CORP GASMAX LX GAS DETECTOR IS AN AMBIENT AIR HAZARDOUS GAS SENSOR ASSEMBLY AND ONLY MONITORS IN THE IMMEDIATE VICINITY OF THE SENSOR HOUSING. A SITE SURVEY IS REQUIRED IN ORDER TO DETERMINE THE BEST PLACEMENT AND QUANTITY OF SENSOR ASSEMBLIES.
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Page 3: Table Of Contents
PRODUCT MAINTENANCE TABLE OF CONTENTS PRODUCT OVERVIEW ............................4 INTRODUCTION ..............................4 PRODUCT SPECIFICATIONS ..........................5 INSTALLATION AND START-UP .......................... 6 PRODUCT PLACEMENT ............................6 PRODUCT MOUNTING ............................7 WIRING CONFIGURATIONS ..........................7 2.3.1 OPENING THE ENCLOSURE ..........................8 2.3.2 CONNECTING POWER ............................ -
Page 4: Product Overview
Non-intrusive interface with the GASMAX LX is made possible by use of the Magnetic Wand included in the purchase of the device. The GASMAX LX display screen will always show the present concentration of gas being detected by the sensor assembly. -
Page 5: Product Specifications
PRODUCT MAINTENANCE 1.2 PRODUCT SPECIFICATIONS System Specifications Operating Voltage +12 to +35 VDC Current Draw 35 mA Maximum Operating Temperature Range -40⁰C to +60⁰C Humidity Range 0% to 98% Relative Humidity, Noncondensing Measurement Range Varies based on gas type Response Time Varies based on gas type Power Electromagnetic Interference (EMI) Filter Protection... -
Page 6: Installation And Start-Up
The primary purpose of the GASMAX LX is to provide an early warning of the accumulation of hazardous gas, in order to minimize hazards to people and property. Proper placement of the device is paramount to achieving this goal. -
Page 7: Product Mounting
2.3 WIRING CONFIGURATIONS The GASMAX LX has a simple wiring configuration, requiring +12 to +35 Volts of wired DC power to operate. Data is communicated from the device through the 4-20 output, to either an GDS Corp monitor or a customer supplied PLC system. Consult the subsequent sections of wiring instructions for pertinent information and guidelines pertaining to the installation of your device. -
Page 8: Opening The Enclosure
2.3.2 CONNECTING POWER To provide power to the GASMAX LX, you will need to connect the power cable from the sensor terminal block on an GDS Corp controller, or alternate user supplied power source, to the GASMAX LX power terminal block located on the back of the control board. - Page 9 PRODUCT MAINTENANCE GDS CONTROLLER GASMAX LX SENSOR TERMINALS POWER TERMINALS +12 to +35 VDC WHITE +12 to +35 VDC WHITE 4-20 mA GREEN 4-20 mA GREEN CONTROLLER GASMAX LX...
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Page 10: Closing The Enclosure
During warmup, the display will show a countdown of the time remaining until the system start-up is complete. The GDS Corp logo and the unit information will also show on the display screen during start-up. At the end of the countdown, the device will be in normal operating mode. -
Page 11: Normal Operating Mode
When the fault is corrected, the unit will return to normal operating mode. For a list of the fault codes and warning symbols of the GASMAX LX, and their associated meaning, refer to the Product Troubleshooting section of this manual. -
Page 12: Product Settings And Configuration
SETTINGS AND CONFIGURATION 3 PRODUCT SETTINGS AND CONFIGURATION The product settings and configuration menu allows the end-user to tailor the device settings to meet their required specifications and/or site conditions. The product settings and configuration menu consist of the following screens: Relay Test ... -
Page 13: Performing The Relay Test
PRODUCT MAINTENANCE 3.1.1 PERFORMING THE RELAY TEST The relay test gas level reading can be increased or decreased in increments of 5% of the sensor scale, up to 100% of the sensor scale. 1. Press the ADD button until the low and high alarm levels are reached and the relay(s) are triggered to light all visual alarm(s) and sound all audio alarm(s) on the monitor. -
Page 14: Null/Calibration Timer Information
SETTINGS AND CONFIGURATION 3.3 NULL/CALIBRATION TIMER INFORMATION The null/calibration time information screen allows the end-user to view the following information: The days since the sensor assembly was last nulled, only updates while the unit is turned on. The days since the sensor assembly was last calibrated, only updates while the unit is turned on. ... -
Page 15: Ma Offset Settings
GASMAX LX no longer matches the reading on the monitoring device, the 4-20 mA offset will need to be recalibrated. The factory default settings on the GASMAX LX for the 4-20 mA offset are 4.00 mA for the zero offset and 20.00 mA for the full-scale offset. -
Page 16: Full-Scale Offset Setting
Due to varying external elements, such as extreme sunlight, the brightness of the display screen may need to be adjusted for optimum viewing. The factory default setting on the GASMAX LX for the display screen contrast is 29, approximately 45% of the contrast scale. The contrast setting ranges from 1 to 64. -
Page 17: Return To Factory Default Settings
3.7 RETURN TO FACTORY DEFAULT SETTINGS Returning the GASMAX LX to its factory default settings will reset all customization of the device, including the null and calibration settings of the sensor element. GM/LX Product and Configuration Factory Default Settings... -
Page 18: Reset Null & Calibration Values
NOTICE If the GASMAX LX is reset to the factory default settings, ALL configuration steps MUST be repeated and the device MUST then be nulled and calibrated for proper operation of the device. 3.8 RESET NULL & CALIBRATION VALUES... -
Page 19: Operation Settings
4 OPERATION SETTINGS At the time of installation, when the power is first applied to the GASMAX LX, the unit is automatically powered on and begins the startup sequence. During the 1-minute warmup, the display will show a countdown of the time remaining until the system start-up is complete. -
Page 20: Sensor Calibration
4.2 SENSOR CALIBRATION Calibration is the process of evaluating and adjusting the precision and accuracy of measurement equipment. Although GDS Corp calibrates every device at the factory, for best accuracy, the detector SHOULD be calibrated in the environment where it is installed. - Page 21 PRODUCT MAINTENANCE 3. Press the ADD button to select “Yes” to confirm that the sensor is in clean air and to begin nulling the sensor. If the sensor is not in clean air, press the SUB button to select “No” to discontinue the null process and to return to the previous screen.
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Page 22: Calibrating The Sensor (Manual Cal)
SETTINGS AND CONFIGURATION 4.2.2 CALIBRATING THE SENSOR (MANUAL CAL) You should ONLY perform the calibration of the sensor after the null process has been completed. For best results, use 50% of the sensor scale of your target gas in an air balance with a flow rate of 0.25 to 0.5 LPM. The screen below will appear upon entering calibration mode. -
Page 23: Calibrating The Sensor (Auto Cal)
PRODUCT MAINTENANCE 4.2.3 CALIBRATING THE SENSOR (AUTO CAL) You should ONLY perform the calibration of the sensor after the null process has been completed. For best results, use 50% of the sensor scale of your target gas in an air balance with a flow rate of 0.25 to 0.5 LPM. 1. - Page 24 SETTINGS AND CONFIGURATION 7. Ensure that the gas is flowing and press the MENU button to begin calibrating the sensor, the unit will automatically begin the calibration process, the amount of time on the timer will vary based on the gas type. During calibration, the display will show a countdown of the time remaining until the process is complete.
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Page 25: Product Maintenance
The presence of such substances in an area does not preclude the use of this device, but the likelihood of the shortened lifetime of the sensor element, as a result, should be noted. Use of the GASMAX LX in these environments may require more frequently scheduled maintenance to ensure safe and reliable system performance. -
Page 26: Sensor Replacement
5.2 SENSOR REPLACEMENT The sensor elements used in the GASMAX LX detects gas in either % or PPM concentrations, this element must be fully functional in order for the system to operate correctly. GDS Corp recommends replacing the sensing element whenever a slow response to gas is observed during the normal calibration process. -
Page 27: Product Troubleshooting
PRODUCT MAINTENANCE 6 PRODUCT TROUBLESHOOTING 1. The control board has lost communication 1. Replace the sensor interface board. Check with the sensor interface board. Sensor Board The unit did not null correctly, due to: 1. Re-null the device in clear air. Try to The presence of gas, ... -
Page 28: Product Replacement Parts And Accessories
SETTINGS AND CONFIGURATION 7 PRODUCT REPLACEMENT PARTS AND ACCESSORIES While not all of the components on the GASMAX LX can be replaced in the field, there are several parts that are replaceable by an GDS Corp Approved Service Technician. To purchase accessories/replacement parts for your device, contact the sales representative of this product for assistance. -
Page 29: Appendix A: Introduction To 4-20 Ma Current Loop Signals
4 mA representing the lowest end of the range and 20 mA the highest. The relationship between the current loop and the gas value is linear. In addition, GDS Corp devices use values below 4 mA to indicate... - Page 30 SETTINGS AND CONFIGURATION MEASURING CURRENT If the value measured is 0 mA, then: the loop wires are broken, the sensor assembly is not powered up, the sensor assembly is malfunctioning, or the monitor is malfunctioning. A digital multi-meter (DMM), or current meter, may be used in conjunction with the monitoring device and/or to test the 4-20 mA current loop signal.
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