Manual

3 How to Operate 3-2. How to start the detector
- 31 - GD-70D
<Start-up Procedures (approximately 25 seconds for system
check of the detector and alarm deactivation)>
Power On
↓
PW A1 A2 F
LCD
Initial Clear
● ○ ○ ○
──────
WARM UP
↓ ↓
Gas
Specifications
Display
● ○ ○ ○
15.0ppm
SIH4
↓ ↓
Detection Mode
● ○ ○ ○
0.0ppm
SIH4
WARNING
• When Oxygen (OSU) is selected, approximately AIR
(normal oxygen concentration) (20.9 vol%) is output after
the detector is started in the atmosphere.
For a specification where an alarm is triggered by the AIR
(normal oxygen concentration) output (e.g., 0 - 5 vol%),
be careful of an alarm issue after the detector is started.
CAUTION
• Do not turn off the detector during the initial clear. The detector is reading the sensor memory during
the initial clear.
• If a new sensor unit is installed or the sensor unit is replaced after the detector is started, the sensor
unit must be warmed up for a specified period which is determined depending on the type of the
sensor unit.
When the semiconductor type sensor unit (SGU) is selected, the suggested warm-up completion
time is displayed in the maintenance mode.
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.
• Because the pyrolyzer unit (PLU-70) must be warmed up for one hour, please warm it up with the
detector.
• After the warm-up is completed, verify that the reading on the flow rate indicator corresponds to the
specified flow rate, and then perform a gas calibration.
PW:POWER
A1:ALM1
A2:ALM2
F:FAULT
●:Lamp on
○:Lamp off