RKI Instruments GD-K8A - Manual (Page 6)

2 • Model GD-K8A Diffusion Detector Head
Description
This section describes the components of the GD-K8A. The GD-K8A consists of three
major components: the housing assembly, the sensor unit and the auto sensor keeper
(ASK). The sensor unit is secured in the housing by two screws. It can be removed by
loosening these two screws for sensor or amplifier replacement. The ASK is also secured
in the housing by two screws.
Figure 1: Model GD-K8A Component Location
Housing Assembly
The housing assembly includes the housing, cable bushing and external wiring terminal
strip.
Housing
The painted steel housing is radio frequency (RF) and dust resistant. A gasketed door
rotates on two hinge pins on the left side of the housing and is secured in the closed
position with a snap latch on the right side of the housing. When the door is closed, a
gasketed hole in the door seals against the sensor and allows the sensor to be exposed to
the ambient air. An earth ground bolt is provided to the left of the external wiring terminal
strip.
Housing
Auto Sensor Keeper
(ASK)
Sensor Unit
External Wiring
Terminal Strip
Cable Bushing
AA Alkaline Battery, 2X
Grounding Bolt
Spark Killer, 2X