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Weekly Probe Integrity Inspection
1. Ignite the phx42.
2. Apply Zero Gas.
3. Use one freshly opened Alcohol-based lens cleaning wipe per probe.
4. Run the wipe along the length of the probe hose and at the joints of your probe while watching
the PDA connected to the phx42.
If there is a leak, it will be drawn through the breach, into the phx42 and will register a PPM
reading within seconds.
5. If you detect a PPM deflection of >2PPM, report an issue.
REMINDER: The length of time the phx42 will take to register a deflection will correspond to the response
time of the machine. If inspecting an extension probe, you must slow down to accommodate the extended
response time (minimum of 1 second per foot of probe tubing +5 seconds).
Probe Hose Construction
The Probe Hose connections have three layers of protection for the Tubing that is conveying the
sample. A tear in the Sheathing or either layer of Heat Shrink may not have compromised the Tubing.
Use the Probe Integrity Inspection above to determine the condition of the Tubing.
REMINDER: Repairing visible damage to the heat shrink will not address a leak in the Tubing,
because the sheathing is permeable.
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