5 How to Operate
5-3. How to start the alarm system
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5-3. How to start the alarm system
(1) Before turning on the power switch, check that the alarm system is installed properly.
(2) Open the front cover of the main unit to find the power switch located at the center in the lower section.
(3) Move the power switch up to turn ON or down to turn OFF.
Front Inside
(4) After turning on the power, all lamps light up and the detection mode is entered immediately after initial
clear (approximately 25 seconds).
<Start-up Procedure>
Preparation
Power-on
Initial clear (approx. 25 seconds)
Detection mode
Power switch
(All lamps ON)
System check of the unit
External output: 0/6/12 VDC output: 6 VDC [standard]
4-20 mA DC output: Approx. 2.5 mA [option]
Deactivation of alarms and troubles (lamps, contacts)
CAUTION
Do not turn off the alarm system during the initial clear.
If a new sensor is installed or the sensor is replaced after the alarm system is started, the
sensor must be warmed up for a specified period which is determined depending on the type of
the sensor. After the warm-up is completed, perform a gas calibration. Read also the operating
manual of the gas detector head.
During the warm-up, the alarm activation and output signals are unstable. Provide a prior
notification to the related sections so that they can prepare for false abnormalities.
When "E-1" is displayed after initial clear, cycle the power or perform heater adjustment in the
maintenance mode "2-5.0".
