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6. Self Test Facilities
A system test may be performed on a selected channel. This will simulate a ramp
up of the gas concentration and activate the appropriate alarms and relays at the
set alarm points. When the concentration is at the sensor range level the system
will ramp down the concentration back to the zero level. The user may use the
MUTE and RESET buttons as in normal TQ4000 system operation. To initiate the
system test the user must hold the desired channel. The user must then press the
SELECT button on the TQ4000 main board to start the system test. To exit the
system test the user must press the UP button on the TQ4000 main board. The
TQ4000 will revert to normal system operation.