Teledyne 1220 - Multipoint flammable gas and vapor detection system - Manual (Page 29)

Multi-Channel Combustible Monitor Operation 4
4-1 Teledyne Analytical Instruments
Operation
4.1 Introduction
Once the System has been Installed, check all wiring to make certain
that it is correct. Check that the POWER switch on the Control Unit is in
the “OFF” position, then apply primary power to the system. Continue
start-up as follows:
1. Check that AUDIBLE ALARM switch is set to BYPASS mode
on the Control Unit.
2. Set the Control Unit POWER switch to ON. The green power
lamp and red bypass lamp should be illuminated. All the green
Power LEDs on the channel modules should be illuminated.
Each channel goes thru the process of a self-diagnostics test for
the following:
Checks the power supply 5V output
Checks the power supply +/-15V outputs
Checks the power supply +/-12V outputs
Checks the analog outputs
Checks for one sensor or two sensor mode
Checks for sensor installation
Checks that the ADC is responding
3. The Channel Modules are shipped with the ZERO and SPAN
preset, and the alarm setpoints at 50% and 80% LEL (Lower
Explosive Limits). The Channel Module relays revert to normal
state after start-up.
4. After verifying that the Control Unit, and each Channel Module
are operating normally, allow the system to stabilize over a 24
hour period.