PerkinElmer Photovac 2020, Manual

Page: 130 / 190

2020 Software Manual
128
Cause: Contamination of sample line, sample probe, inlet
filter or fittings before the detector.
Action: Clean or replace the sample line, sample
probe or the inlet filter. See Replacing the
Sample Inlet Filter on page 120.
Cause: Span gas and zero air are mixed up.
Action: Ensure clean air is used to zero 2020. If you
are using gas bags, mark the calibration and
zero gas bags clearly.
Cause: Ambient air is contaminated.
Action: If you are unsure about the quality of
ambient air, use a supply of commercial
zero grade air to zero 2020. See
General
Information on page 69.
Falt2: Signal from span gas is too small.
Cause: Span gas and zero air mixed up.
Action: Ensure clean air is used to zero 2020. If you
are using gas bags, mark the calibration and
zero gas bags clearly.
Action: Ensure the span gas is of a reliable
concentration.
Cause: UV lamp window is dirty.
WARNING
Do not remove the UV lamp in a hazardous location.
Action: Clean the UV lamp window. See Cleaning
the UV Lamp Window on page 117.
Cause: UV lamp is failing.