RKI Instruments GX-2012 Manual - Manual (Page 163)

GX-2012 Operator’s Manual Replacing a Sensor • 155
flow chamber.
4. Grab the exhaust tube and pull it gently away from the unit to slide the
flow chamber out of the unit.
5. Gently pull on the knob of the sensor gasket to remove it. Be sure not to
lose any of the filters that are in it. The sensors will be exposed.
6. Remove the sensor from its socket.
7. Carefully insert the replacement sensor in the correct socket.
Figure 27: Replacing a Sensor
CAUTION: When replacing a sensor, verify that the sensor is properly
aligned with its socket before inserting it into the socket. The CO
and H
2
S sensors have alignment slots which match up with
alignment tabs in the sockets. The combustible sensors each
have two non-polarized contacts which must line up with the
contacts in their socket. Forcing a sensor into its socket may
damage the sensor or the socket.
Flow
Chamber
PPM
Combustible
Sensor
O2
HC
PPM
HC
LEL
Align Tabs in CO Sensor
with Tabs in Sockets
% LEL
Combustible Sensor
% Volume
Combustible Sensor
CO Sensor
Sensor
Gasket
Knob
HC
VOL
CO
Oxygen
Sensor
Exhaust