INFICON 2020ppbPRO Portable Photoionization Detector - Manual (Page 91)

ISP-074-576-P1D 85
Instrument
over range High concentrations of
gases will saturate the
detector and electronics. Wait until the display returns to
normal. PIDs are designed to
detect relatively low levels of
gases.
The detector has become
saturated. Move the 2020ppbPRO to a
location where it can sample
clean air. Sample clean air
until the readings stabilize at a
low level.
Detector has been short-
circuited by foreign matter
in the cell. Contact INFICON.
General Questions
Very low or no
instrument
response
detected, yet
compounds are
known to be
present The 2020ppbPRO has not
been properly calibrated. Verify the concentration of the
span gas. Calibrate the
2020ppbPRO. See page 60.
Memory slots are not set
up correctly. Program the memory slots.
See page 57.
Response Factor has
been set to zero. Set Response Factor to 1.0 or
refer to Table 6 for correct
response factor.
Detector is leaking. Ensure the UV lamp is
correctly installed.
Ensure the lamp cover is tight.
Do not over tighten.
Ensure the O-ring seal on the
lamp cover is positioned
correctly.
UV lamp is the incorrect
size. Use only F1760150
Sampling environment is
extremely humid or it is
raining. Water vapor is not ionized by
the PID. Water vapor does
scatter and absorb light that
causes a higher or lower
reading. The 2020ppbPRO
has been designed to work in
a humid environment but you