MGS-350 Manual
30
6509-9000 Rev 1
Step
Bump Testing Using Gas Ampoules
7
Tighten the wing-nut screw onto the ampoule until it shatters
allowing the gas to diffuse in the beaker. It should be left in
place for approximately 5 minutes.
8
The voltage output will increase. This confirms that the
sensor is responding. A response equivalent to at least 50%
(typically) of the test gas will confirm that the system is in
order.
9
Remove the beaker from the sensor. Carefully remove any
ampoule remains from the gas detector and beaker.
Figure 9. Gas Ampoules for Bump Testing
4.3. Calibration: Exchange Method
Bacharach recommends replacement of the sensor PCB with a pre-
calibrated certified unit every 3 years for semiconductor (SC), infrared
(IR) and catalytic (CAT), and 2 years for Electrochemical (EC) types.
Tools required:
•
A pre-calibrated PCB sensor board
•
A voltmeter (crocodile clips recommended)