SBS H2 - Operation

SBS-H2 Users Manual, Rev. 07-17-TNEMH2 Page 12 July 2017
8.0 Operation
Keep the detector on at all times. The solid green LED for ‘POWER’ on the main control indicates that
the detector is powered on.
When power is first turned on, a warm up period of 30 seconds will elapse before the unit will
function. This delay is to prevent false activation of the internal relays and alarm.
Should the concentration of hydrogen gas in the air surrounding the sensor reach 1% by volume, the
“1% Warning” yellow LED will light up on the main control of the unit. In addition, the 1% internal relay
will energize and can be used to activate a remote exhaust fan.
Should the hydrogen gas concentration reach 2% by volume, the “2% Alarm” red LED will light up,
the strobe will flash and an audible alarm will sound. In addition, the 2% internal relay will energize
and can be used to activate a building management/alarm system (via SCADA/Modbus).
Condition
Main Control
Indicators
Power Warning Alarm
Individual Sensor
Indicators
Relay
Closure
Audible
Alarm
Strobe
Normal Operation
(sensor installed)
None
None
None
H
2
Alarm (1% H
2
)
(blinking green)
Warning
Relay
Energized
None
None
H
2
Warning (2% H
2
)
(same flash rate as strobe)
Warning and
Alarm Relay
Energized
ON
ON
Sensor/Cable Fault
None
None
None
Communication
with Sensor Lost
(plugged in, but not lit)
None
None
None
Main Control Indicators
Individual Sensor Indicators