Sensit VMD Betriebsanleitung
SENSIT®VMD
Manufactured by:
SENSIT Technologies
851 Transport Drive • Valparaiso, IN 46383 (USA) • www.gasleaksensors.com
Set Up & Operating inStrUctiOnS
Read and Understand Instructions prior to use
VEHICLE METHANE DETECTOR
TABLE OF CONTENTS
General Description....................................................................4
Parts and Accessories................................................................4
General Specications................................................................5
Warnings ....................................................................................5
Installation .............................................................................. 6-8
User Interface....................................................................... 9-13
Operation............................................................................ 13-15
How to plot Survey Logs on Google Earth ......................... 16-17
Warranty ....................................................................Back Cover
SENSIT®VMD
3
VEHICLE METHANE DETECTOR
Sensit VMD
Vehicle Methane Detector – Open Path IR
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 . This is measured using specialized electronics and software. The information is sent
to a computer for processing and displaying real-time information for the operator.
Parts and Accessories
Emitter assembly
Tablet computer
Mounting assembly (for use with front mount 2” Reese style hitch, NOT INCLUDED)
Blue tooth module (wireless connection to computer)
4
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.
Data connection: Bluetooth
Operator Interface and Display: Backlit 7” touchscreen weatherproof notebook.
Alarms: Audible with adjustable set point
Error indications: Low Light Detection failure, Communication failure, Zero Fail, Test Fail, Cal Fail
System Power: 60 watts @ 12 VDC
System Voltage: 10-16 VDC
Mechanical Mounting: bracket mount
Installation Time: <2 hours (typical)
External Housing Rating: IP 54
Display Housing Rating: Waterproof tablet style PC
External Sub-System Materials: Aluminum and plastic
Operating Temperature Range: -22 o F to 122 o F
Operating Humidity Range: 5 to 100% RH
Warnings
Clean the lenses prior to each days use for best results.
Use extreme caution when monitoring the computer when driving. Any adjustments should be
made only when the vehicle is safely stopped away from traffic.
When not in use refer to transport position recommendation to prevent potential damage.
5
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.
2. Insert the short end of the “L” bracket into the hitch with the long side up. There a
several adjustment holes for distance in and out from the bumper. Insert the pin and
tighten the hitch stabilizer.
Pin
Hitch Stabilizer
6
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).
4. Route the power wires (red+ and black-) through the grill and engine compartment to
the battery. Allow a little bit of slack to allow for full range of adjustment. The wires will
have stripped ends. Use of crimp connectors can used at the end of the wires to attach
to the battery. Be sure to use dielectric grease on connections to prevent corrosion.
CAUTON: RED wire attaches to the positive (+) of the battery and the BLACK wire
attaches to the negative (-). Plug in the power connector to the VMD.
5. Raise the VMD up the highest position on the “L” bracket, referred to as the “transport
position”, and insert the pin.
Note: Raise to the highest position without obstructing headlights, turn signals, etc.
Jam Bolt
Pin
Transport Position
7
6. The computer can be mounted to the dash or floor of the vehicle. Mounting options can
be found at the link below.
http://downloadt.advantech.com/ProductFile/PIS/9668TREK37E/Product%20-
%20Datasheet/Accessories%20for%20TREK%20Series_DS_010912_A-
DLoG20120111094933.pdf
7. Plug power cord into the computer and the other end into 12 volt outlet.
NOTE: We always recommend when vehicle is not being used for an active survey that
the VMD is locked into the “Transport Position”. When being used for an active survey,
the “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.
Transport Position Survey Position
8
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.
VMD User Interface is divided onto 2 sections.
1. General Function Panel:
This section contains the following general function that are always accessible.
a. CLOSE: Close VMD application without turning VMD off. If you do not open
application again and power on VMD, VMD will shut down after 10 min.
b. CONVERT FILE TO KML: This function creates a file that can be used with google
earth to plot the survey logs.
c. BT: If DataStream is activated in USER SETUP, the Bluetooth function is activated.
Color of button text indicates the status of data stream. If button text is green,
streaming is on. If button text is red, streaming is off. If DataStream is disabled,
this button is grayed out and not usable.
d. GPS: Color of button text indicates the status of GPS.
i. Green: GPS module is connected and acquiring data.
ii. Gray: GPS module is connected but satellite signal is not strong enough to
received GPS data.
iii. Red: If GPS module is not connected. You can click button to scan again
to see if module is connected.
e. Information Box: This display status of operation performed.
9
f. STAND BY/WAKEUP: Standby disables the lamp and places the VMD in standby
mode to conserve power when unit is not in use. After unit goes in standby
mode, this button changes function and is displayed as 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.
g. POWER ON/SHUTDOWN: It establishes the communication between the
computer and VMD, turns on VMD, and connects to GPS if connected. After
power on, this button changes function and is displayed as SHUTDOWN. Clicking
SHUTDOWN will turn instrument off.
2. Mode/Tab Panel:
This panel provides 4 different modes. Not all modes are displayed all the time.
a. WARMUP Mode:
This is initial screen for VMD application. After pressing POWER ON the VMD will
begin the warm up process.
i. The chart will show the methane sensitivity and the temperature of the
VMD.
ii. Clicking STOP will disable the data logging and allow access to other
modes.
iii. Clicking Clear Chart will clear chart.
iv. Clicking Clear Table will clear data in table.
v. Clicking SAVE will save the warm up data to a file that can be viewed by a
Sensit technician for troubleshooting purposes.
10
Andere Handbücher für VMD
1
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