Thermo Scientific 43iQ, Instruction Manual

Page: 176 / 284

Troubleshooting
Troubleshooting Guide
6-6 43iQ Instruction Manual Thermo Scientific
Problem Possible Cause Action
possible.
Noise pick-up by recorder or
data logger Check analog cable shielding
and replace.
Try to localize source of noise
by comparing analog signal to
data collected through RS-232
or Ethernet.
Poor linearity Problem with calibrator Verify accuracy of the
calibration system with an
independent flow meter.
Hydrocarbon kicker Replace kicker if older than 3
years.
Leak in sample probe line Check for variable dilution.
Excessive response time Averaging time is not set
correctly Check the “Averaging Time” in
the Settings>Measurement
Settings screen.
Instrument is not drawing in
sample at the expected
flow rate Check sample flow and
pressure readings in the
Settings>Health Check>Status
and Alarms>Flow and Pressure
screen.
Use an independent flow meter
to check flows at the sample
inlet and exhaust bulkheads
(they should match).
Perform a leak test as
described on page
5-5 .
SO
2
is being absorbed and
released by dirt in tubing or
filters of the calibration
system or contamination
inside the instrument
Replace any lines made of vinyl
or plastics with fresh PTFE or
stainless steel.
Replace PTFE filter membranes
that look dirty.
Remove any filters that are not
PTFE membranes.
Contaminated bench Contact technical support for
additional information and
options.
Analog signal doesn’t
match expected value Software has not been
configured Verify that the selected analog
output has been properly
configured to match the data
system.
Analog output goes above By default, a 5% over and