PerkinElmer Photovac 2020 Manual page 140

2020 Software Manual
WARNING
Problem: Instrument status shows "Over".
WARNING
138
Do not remove or recharge the battery pack in a hazardous location.
Action: Connect 2020 to the AC adapter and turn
2020 on. Turn the pump off. See Pump on
page 51. While 2020 is running the internal
battery is charging. Leave the instrument
running for approximately 24 hours.
Cause: High concentrations of gases and vapors will cause
a rapid change in signal level. The detector and
associated electronics may become temporarily
saturated.
Action: Wait a few seconds for the status to return
to normal. PIDs are designed to detect
relatively low concentrations of gases and
vapors. Exposure to very high
concentrations may result in a very high or
maximum response.
Cause: The detector has become saturated.
Action: Move 2020 to a location where it can
sample clean air. Sample clean air until the
reading stabilizes around 0.
Cause: Detector has been short circuited by foreign matter
in the detector cell.
Do not service 2020 in a hazardous location.