GX-6000 Operator’s Manual
Appendix F: ESS-03 Toxic Sensors • 193
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.
Figure 40: Smart Sensor Positions
Replacing the SO
2
Sensor’s Filter Set
The H
2
S-scrubbing filters installed over the SO
2
sensor’s face are designed to last for 960
minutes of exposure to 25 ppm H
2
S. This equates to roughly 6 years of 30 second bump
tests if the instrument does not see H
2
S during normal operation.
The filter should last the life of the sensor. However, if you notice the SO
2
channel
responding to the presence of H
2
S, you should replace the filters.
Materials
•
Filter set (1 each 33-0176 and 33-7135)
•
Rubber gloves (do not touch the replacement filter set with bare hands)
•
Stainless steel tweezers
Procedure
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.
H 2 S
C O
Smart Sensor 1
Position
Smart Sensor 2
Position
