GD-70D - 12 -
CAUTION
• The sensor unit must be handled carefully to ensure quality. When the sensor unit is stored, a
dedicated warehouse and power equipment for the sensor unit are needed. In principal, the sensor
unit must not be detached from the detector when it is handled or stored.
• Be sure that the sensor unit is installed properly.
If a sensor unit is of different specification or principle than the one shipped from the manufacturer, a
message will be displayed on the detector LCD (C-02).
If this message is displayed, make sure you are using the correct sensor unit.
• After the sensor unit is replaced, always perform a gas calibration (zero adjustment and span
<Mounting Plate>
The mounting plate gets installed to the installation site. The main unit connects to the mounting plate
using the 10-point terminal plate.
<Sensor Unit>
A sensor unit installed in the detector is the same regardless of
the detection principle which means sensor units are
interchangeable. Each sensor unit has a different color that
corresponds to the detection principle as shown below. Handling
of the sensor unit depends on the detection principle.
10-point terminal plate: Connections for power supply,
signal cables and other external wires.
Locking lever: Locks the main unit to the mounting plate.