Sensor Placement Considerations - United Electric Controls VANGUARD Installation And Operation Instruction Manual

Combustible sensors are comprised of an infrared
sensor packaged into a stainless steel housing. These
are consumable, field replaceable parts (see Section 4.1,
Sensor Replacement).
❶
Remove FLEXsense™ sensor from packaging.
❷
Retract the sensor locking pin and twist 90 degrees to lock in
retracted position.
❸
Align the locating pins (see Figure 9) on the FLEXsense™ sensor
to the keyed positions on the sensor housing (see Figure 10).
❹
Insert the sensor. A click will be felt and heard, ensuring the
sensor has been inserted correctly.
❺
Twist the sensor locking pin 90 degrees and release to engage
the sensor locking pin.
❻
Push button to activate sensor.
LOCATING PIN
Figure 9
❼
Once the button is pushed, the base transmitter initializes the
sensor activation process. During this activation, the screen in Figure
11 will be displayed. This activation may take up to 2 minutes.
ACTIVATING
PLEASE
❽
The device will prompt the user to zero the offset. As shown in
Figure 12.
CH
4
PRESS AND HOLD BUTTON
TO ZERO SENSOR
OR PUSH TO SKIP
Figure 10
WAIT
Figure 11
XX %LEL
Figure 12
A. To zero the offset, press and hold the calibration button
until the display screen in Figure 13 appears. This takes
about 10 seconds.
B. To ignore the offset, press and release the calibration
button to skip the zeroing process to step 9.
ZEROING DONE
SENSOR ACTIVE
CALIBRATE NEW SENSOR
❾
Once the sensor initialization process is complete, a "Sensor
Active Calibrate New Sensors" message will show (see Figure 14)
before automatically returning to home screen (Figure 8).
SENSOR
ACTIVE
CALIBRATE
NEW SENSORS
❿
The sensor is self-configuring with the device and once booted up
(see Section 2.8 Network Configuration) will display the proper gas
concentration.
NOTE: To zero the combustible sensor at any time, press
and hold the calibration button for 10 seconds. Refer to
section 2.2, step 8, to continue sequence.

2.3 Sensor Placement Considerations

EXPOSURE TO TOXIC GAS MAY RESULT IN LOSS OF
CONSCIOUSNESS OR DEATH. SEE ANNEX 1 FOR TOXIC GAS
SENSOR DETAILS.
COMBUSTIBLE GAS ACCUMULATION IN CLOSED
AREAS MAY CAUSE EXPLOSION, AND RESULT IN LOSS
OF CONSCIOUSNESS OR DEATH. SEE ANNEX 1 FOR
COMBUSTIBLE GAS SENSOR DETAILS.
THIS DEVICE MUST BE MOUNTED VERTICALLY WITH THE
SENSOR POINTING DOWNWARD.
Individual applications need to be assessed for correct
sensor placement. The target gas needs to be determined
along with the gas density, and potential coverage area.
FOR GASES THAT ARE HEAVIER THAN AIR, SENSOR
INSTALLATION IS RECOMMENDED NEAR THE GROUND AND
BELOW THE POTENTIAL LEAK SOURCE.
5
Figure 13
Figure 14
IM_TCD60 02