PerkinElmer Photovac 2020 Manual page 135

Portable photoionization detector
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Cause: You are not using the correct Cal Memory.
NOTE: It does not matter which Cal Memory is selected or which
response factor is entered. 2020's response is not specific to
any one compound. The reading displayed represents the total
concentration of all ionizable compounds in the sample.
Cause: Detector is leaking. A decrease in sensitivity may
Do not remove or replace the UV lamp in a hazardous location.
WARNING
Cause: UV lamp is too long, causing flow to be restricted.
Action: Enter the correct response factor. Refer to
page 169 for a list of response factors. If
the compound is not listed or you are
measuring gas mixtures, then enter a value
of 1.0.
Action: Select the correct Cal Memory for your
application. See Calibration Using the
Flow-Match Regulator on page 70 or
Calibration Using a Gas Bag on page 73.
be due to a leak in the detector.
Action: Ensure the UV lamp has been installed
correctly. See Removing and Replacing
the UV Lamp on page 116.
Action: Ensure the lamp cover has been tightened
down. Do not overtighten the cover.
Action: Ensure the o-ring seal on the la mp cover is
positioned correctly. See Removing and
Replacing the UV Lamp on page 116.
Troubleshooting
133

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