230 • Appendix H: 10.0 eV/Benzene PID Sensor
GX-6000 Operator’s Manual
that the tube be replaced before starting a new measurement in Benzene Select Mode.
If the tubes are being stored in a refrigerator, take them out of the refrigerator and let them
sit overnight before using them.
Instructions to Replace Tube
1 . Remove the front of the tube holder by pushing on the locking mechanism and
pulling the front half away from the back half, shown below.
Figure 49: Replacing a Tube
2 . Remove the used tube. Take care not to touch the broken ends of the tube.
3 . Remove the cap from the tube holder.
4 . Break off the tips of the new tube using the tube holder’s tip-breaking feature. The
reservoir can hold approximately 12 tips and will need to be periodically emptied.
5 . Insert the new tube in the front half of the tube holder. The arrow on the tube should
be pointing away from the front half.
Figure 50: Inserting New Tube Into Front Half
6 . Line up the locking feature in the front half with its mate in the back half and insert
the front half/tube assembly into the back half making sure the locking feature
engages.
Figure 51: Reassembling Tube Holder
Pull
Push
Front Half
Back Half
Front Half
Tube
GAS
Locking Feature
Back Half
GAS
Tube
Front Half
