Electrical Testing; Testing The Sensor - SBS H2 Installation, Operation & Maintenance Instructions Manual

9.0 Electrical Testing

A "TEST" button is located on the front of the main control. Push and hold this button for
approximately 10 seconds to test the unit's electronic circuitry.
The warning and alarm LEDs will light up in sequence, the strobe will flash, the relays will activate
whatever is connected to them and the internal warning alarm will sound.
Note: The "TEST" button does NOT test the sensor(s) itself – only the unit's electronic circuitry.

10.0 Testing the Sensor

The sensors and main controls are factory calibrated. It is recommended to test each sensor's
functionality every 12-18 months with the H2-TESTKIT.
The H2-TESTKIT is intended for periodic testing of the functionality and proper operation of the
system. Once a sensor is installed, calibration or adjustment of the sensor is not possible. Please
contact your sales representative if sensor calibration is desired or required.
The H2-TESTKIT includes the following:

1% (17 liters) H₂ in air calibrated gas canister

2% (17 liters) H₂ in air calibrated gas canister

Regulator

Flexible tubing with sensor head adapter
Testing the 1% Warning and 2% Alarm State
1. Connect the calibration fixture to the 1% H2 air gas cylinder.
2. Secure the test fixture to the sensor module connected to sensor by pressing the flexible tubing
completely over the inlet to the sensor head.
3. Turn on the gas flow by slowly cracking the valve on the cylinder regulator until gas begins to
flow. Please wait 30 seconds to ensure the air in the tubing has been purged.
4. Continue gas flow and wait for the yellow LED warning to light up and the 1% relay to energize.
5. Turn off gas and remove from sensor.
6. Repeat Steps 1-5 above using the 2% H2 air gas cylinder to activate the 2% alarm and relay.
The 2% alarm threshold is connected to the red LED, the audible alarm and the strobe light up,
which will activate during testing.
7. Repeat steps for every sensor installed.
Note: If the unit does not alarm during these tests the sensor may need to be replaced.
Replacing the Sensor
In a typical operating environment SBS recommends that each sensor be replaced every three years.
An abusive operating environment can and will shorten a unit's useful life. In dusty/dirty applications
or in situations where a sensor is often subjected to different gases, it is recommended to replace
each sensor after one (1) year.
SBS-H2 Users Manual, Rev. 07-17-TNEMH2 Page 13 July 2017