Thermo Scientific 43iQTL Instruction Manual page 178

Troubleshooting
Troubleshooting Guide
6-6 43iQTL Instruction Manual
Problem
SO
and released by dirt in
tubing or filters of the
calibration system or
contamination inside
the instrument
Contaminated bench
Analog signal doesn't Software has not been
match expected value configured
Analog output goes
above full-scale value
or below zero
Recorder is drawing
down output
Flow meter fluctuations Dirty pump diaphragm
Capillary blocked
Clogged PTFE line
Alarm – Chamber Heater failed
Temperature
Defective PCB
Alarm – Perm Gas Temp Incorrect Perm oven
set temperature or
alarm setting
Perm oven heater
thermistor or gas
thermistor error
Perm oven failure
Alarm – Pressure High pressure
indication
Possible Cause
Perform a leak test as described on
page 5-5.
is being absorbed Replace any lines made of vinyl or
2
plastics with fresh PTFE or stainless
steel.
Replace PTFE filter membranes that look
dirty.
Remove any filters that are not PTFE
membranes.
Contact technical support for additional
information and options.
Verify that the selected analog output
has been properly configured to match
the data system.
By default, a 5% over and under range
on the analog outputs is provided. If this
is not desirable due to system
restrictions, it may be turned off in the
Settings>Communications>Analog I/O
screen.
Verify that the recorder or data logger
input impedance meets minimum
requirements.
Clean or replace pump diaphragm.
Clean or replace capillary.
Inspect all sample lines.
Replace heaters as needed.
Replace PCB.
Check that the alarm settings match the
set temperature.
Replace thermistor.
Replace the Perm oven.
Check plumbing for leaks.
Check the pump for a tear in the
diaphragm. Replace if needed.
Action
Thermo Scientific