5 How to Operate
5-4. How to detect
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GD-D58 Series
5-4. How to detect
Turn ON the power switch of the indicator/alarm unit. The gas detection is started after the initial clear*
of the indicator/alarm unit.
Check that the operation is normal in accordance with the operating manual of the indicator/alarm unit.
Make sure that the flow rate of the detector head is appropriate.
* The initial operation just after power-on depends on the indicator/alarm unit. For details, see the
operating manual of the indicator/alarm unit.
5-5. How to exit
Turn OFF the power switch of the indicator/alarm unit.
Turn off the power supply to the detector head.
Open the electric circuit lid.*
Turn OFF the power switch of the detector head.
Close the electric circuit lid.*
* Only GD-D58·AC has a power switch. Since GD-D58·DC does not have any power switch, there is no
need to open or close the electric circuit lid.
CAUTION
If a new sensor is installed or the sensor is replaced even after the start-up, 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.
WARNING
When the detector head is turned off, an alarm may be triggered on the upper (central) system.
Before turning off the detector head, INHIBIT (point skip) on the upper (central) system must be
activated. Decide whether the power can be turned off by checking the operation of the devices
connected to the external output or external contact output terminal of the detector head.
