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Summary of Contents for Sensit VMD
- Page 1 M E T H A N E D E T E C T O R Set Up & Operating inStrUctiOnS Read and Understand Instructions prior to use Manufactured by: SENSIT Technologies 851 Transport Drive • Valparaiso, IN 46383 (USA) • www.gasleaksensors.com...
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Page 3: Table Of Contents
SENSIT ® V E H I C L E M E T H A N E D E T E C T O R TABLE OF CONTENTS General Description ..............4 Parts and Accessories ..............4 General Specifications..............5 Warnings ..................5 Installation ................6-8 User Interface ............... -
Page 4: General Description
Set up and operating instructions General Description The Sensit VMD is a vehicle mounted methane gas detection system. The principle of operation is open path Infrared absorption spectroscopy technology. As the beam of light passes through a methane (natural gas) plum some of the light is absorbed between the IR Transmitter and IR Receiver . -
Page 5: General Specifications
General Specifications Sensitivity: 0.1 PPM / meter CH4 at 25 MPH Measurement Range: 1.0 to 1000 PPM / meter Display Ranges: Automatic System test: Automatic during turn on Response Check: Operator initiated; pass/fail determined by preset software limits Calibration Adjustment: Field performed with calibration cell and on-board operator selection via PC. -
Page 6: Installation
Installation Mounting; two brackets on pipe; 10” minimum clearance from light transmitter and receiver. Electrical; 5A 250v fuse; Red wire positive; Black wire negative; Computer; Electrical connection; serial connection; External Bluetooth module. 1. Install a 2” front mount hitch on the front of the vehicle. If a bolt on hitch cannot be sourced, a local welding shop should be able to mount one for you as pictured below. - Page 7 3. Ensure that the “Jam Bolt” is backed out from the VMD bracket. Slide the VMD (with mounting bracket) over the “L” bracket and lower the VMD until it bottoms out on the “L” bracket (DO NOT INSERT THE PIN).
- Page 8 “Survey Position”, the VMD sensor/detector should be no higher than the bottom of the vehicle bumper. If used in lower positions caution must be taken not to allow the VMD to impact the ground or road surface. The “Jam Bolt” should be tightened in all positions.
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Page 9: User Interface
User Interface The user interface of the Sensit VMD is controlled by a tablet computer with touch screen and “hot key” operation. Using a stylus or your finger in the button areas will activate the function. The “hot keys” F1 thru F5 also control the bottom row of functions. Only those functions with darkened commands are active in the particular operation mode. - Page 10 WAKEUP. Use WAKE UP button to start using the VMD again. This enables the lamp. A 120 second wait period will be displayed for the lamp to power on and stabilize.
- Page 11 b. SURVEY Mode: After WARM UP and Auto Zero are successful the display will show READY in the SURVEY tab. i. LAST PEAK: This is highest detection peak for the last running 120 seconds ii. CALIBRATE: Initiates the calibration procedure. External calibration cell required.
- Page 12 LDL (Lower Detection Limit): The lowest gas reading that can be displayed. Password protected. vi. Perform Advance Cal (Default: Off): Activating this will cause the VMD to perform an additional advanced calibration process. This will require 5 to 15 minutes.
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Page 13: Operation
Go to the area where you want to perform the survey. Lower the VMD from the “Transport position” (all the way up) to the “Survey position”, the mount allows for a broad range of height adjustment. Adjust as needed and tighten the “Jam Bolt”. -
Page 14: Operation
“paused”. 2. Hang and tighten the thumbscrew of the external calibration cell into the light path against the lens of the receiver or transmitter of the VMD . Click the CAL button. It will display following message. 3. Click OK to start calibration if you already inserted calibration cell. - Page 15 8. Click YES, if you would like to proceed further. 9. If you click no, it will display CAL FAIL in the SURVEY MODE. Instrument will not be able to be used until calibration is successful. 10. If calibration still fails, please contact Sensit customer service for technical help.
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Page 16: How To Plot Survey Logs On Google Earth
How to plot Survey Logs on Google Earth? STEP 1: COVERT SURVEY FILE TO KML FILE FORMAT: 1. Click on CONVERT FILE TO KML button from common function panel. 2. Following screen will be displayed. 3. Click SELECT FILE TO CONVERT to select the Survey log files. By default file browser window will open the default survey log file folder. - Page 17 4. Open the survey file. Survey files are “.csv” files and organized as YEAR/Month/srno_ddMMMyyyy_hhmmss.csv. Multiple files can be converted at the same time 5. Please select the appropriate value for PPM to identify the leak detection area on the map. 6.
- Page 18 NOTES...
- Page 19 NOTES...
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Page 20: Warranty
Warranty Your Sensit VMD is warranted to be free from defects in materials and workmanship for a period of two years after purchase. If within the warranty period the instrument should become inoperative from such defects the instrument will be repaired or replaced at our option. This warranty covers normal use and does not cover damage which occurs in shipment or failure which results from alteration, tampering, accident, misuse, abuse, neglect or improper maintenance.
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