UNCONTROLLED IF PRINTED 18
Continuous Monitoring
The phx42 can be used to detect low concentrations of VOC continuously. This should not be used for
continuous monitoring of known to be present VOCs, but for normally clean air that could contain
VOC. Sustained High levels of VOC and harsh chemicals can cause contamination and or damage to
the phx42 as it is designed as a detection tool, not a process monitoring analyzer.
The phx42 and its charger MUST be outside of a hazardous area.
Before use, check for H
2
leaks with the following procedure:
1. Install a new H
2
fill adapter O-ring.
2. Turn off the phx42.
3. Bleed air from the fill adapter.
4. Adjust the regulator to 1000 psi.
5. Connect the fill adapter to the phx42.
6. Open the fill valve.
7. Turn off the H
2
supply bottle.
8. Note the pressure on the fill adapter gauges.
9. Let it sit for 1 hour.
10. IF there is no drop in pressure on the gauges, turn the bottle back on, and then turn on the
phx42.
11. Plug in the charger and ignite.
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