Honeywell IAQPoint2 User Manual page 58

IAQPoint2™
Affected
Models
• • • • • •
52
IAQPoint2 Troubleshooting Guide
Version
Symptom
Gas Calibration
operation reports
"base cal fail"
Diagnostic
Cause
Tests
Confirm that the
monitor's reported
Calibration gas
concentration
was not delivered
responded when the
to the sensor.
calibration gas flow
started.
Wrong calibration
gas cylinder used
Confirm that the
reported concentra-
The sensor was
tion is within 200
previously mis-
ppm of the target
caibrated to be
concentration
far in error. This
can happen if a
zero calibration is
performed without
gas.
The monitor is
defective
Solution
Confirm that a
regulator for 0.5 l/
min flow is used
such as Honey-
well part number
M-502585.
Confirm that the
gas delivery tube
is connected to the
side calibration port
shown in Figures 6
and 7.
Confirm that the
correct calibration
gas is used such
as Honeywell part
M-501038
Change the calibra-
tion is two smaller
steps by setting the
target concentration
midway between
the current reading
and the cylinder's
true CO2 concen-
tration.
Contact Honewell
Service.