GX-6000 Operator’s Manual
Chapter 6: Maintenance • 113
7 . Insert the flow chamber back into the instrument.
8 . Tighten the flow chamber’s four screws that were loosened in Step 2.
9 . To verify that the sensor gasket was inserted properly:
a. Turn the GX-6000 on.
b. Plug the inlet with your finger.
c. Verify that the GX-6000 goes into low flow alarm. If the GX-6000 does not go
into low flow alarm, turn the instrument off and attempt to seat the sensor gasket
again.
Replacing a Sensor
1 . Verify that the GX-6000 is off.
2 . Use a small Phillips screwdriver to unscrew the four screws holding the flow
chamber to the rest of the GX-6000’s case.
3 . Grasp the sides of the flow chamber and lift it away from the rest of the case. The
screws are captive screws and will not come out of the flow chamber.
4 . Gently pull up the edges of the sensor gasket to loosen it from its connections. Be
sure not to lose any of the filters that are in it. The sensors will be exposed.
5 . Locate the sensor you want to replace and remove it from its socket.
6 . Carefully insert the replacement sensor in the correct socket.
a. Be sure that the new sensor is installed in the same position as the old sensor and
that the following sensor priority for the smart sensor 1 position is maintained.
Table 14: Priority for Smart Sensor 1 Position
For example, if your instrument is a 4-gas + low range PID + high range PID, the
low range PID sensor should be in the smart sensor 1 position and the high range
PID sensor should be in the smart sensor 2 position. If your instrument is a 4-gas
+ high range PID, the high range PID sensor should be in the smart sensor 1
position and a dummy sensor should be installed in the smart sensor 2 position.
See the figure below for the location of the smart sensor 1 and 2 positions.
High Priority
Low Priority
10.6 eV low range PID
10.0 eV/benzene PID
11.7 eV PID
10.6 eV high range PID
ESS-03 Chlorine
ESS-03 Ammonia
IR and other ESS-03 sensors