- 11 - GD-70D
①
Used to enter User and Maintenance Mode.
It is also used to cancel or skip in a specific mode.
②
Used to enter the test mode.
It is used for confirmation in a specific mode.
③
Used to change screens or change a value (UP).
④
Used to change screens or change a value (DOWN).
⑤
Lever to lock the main unit. Push it to attach or detach the main unit.
⑥
Sensor unit nameplate
display window
Window to view information on the currently installed sensor.
⑦
Power lamp. Turns green when the power is on.
⑧
First alarm lamp. Turns red when the first alarm is reached.
⑨
Second alarm lamp. Turns red when the second alarm is reached.
⑩
Fault lamp. Turns yellow when an abnormality is detected in the detector.
⑪
Displays the gas name in chemical formula (e.g. Silane = SIH4).
⑫
Concentration value
display
Displays the gas concentration.
⑬
Displays the unit according to the specification (ppm, ppb, vol%, %, %LEL).
⑭
Concentration bar
indicator
The detectable range (full scale = FS) is divided into 20 segments. The
increase in concentration is displayed in proportion to the full scale.
⑮
The alarm setpoints (AL1 and AL2) are indicated on the concentration bar.
⑯
Displays the flow rate. When the line is in the middle of the indicator, the
flow rate is normal (0.5 L/min).
⑰
For GD-70D-NT, this indicator is displayed while transmitting data with the
upper unit (TX, RX).
⑱
Displayed while in Maintenance Mode. When this indicator is displayed, the
alarm contact is disconnected and there are no alarms.
⑲
Displayed when the inhibition (point skip) is set.
⑳
Pyrolyzer unit
connection indicator
Displayed when the dedicated pyrolyzer unit (PLU-70) is connected.
<Main Unit>
The main unit of the GD-70D houses the sensor unit, pump unit,
and circuitry for the detector. The main unit installs to the
mounting plate’s terminal plate.
<Pump Unit>
The pump unit gets installed in the main unit. It draws sample into the detector at 0.5 L/min.
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