Thermo Scientific 43iQTL Instruction Manual page 174

Troubleshooting
Troubleshooting Guide
6-2 43iQTL Instruction Manual
Problem
Micro SD Card
Programming
Solenoid current out of Sticking or damaged
range (option) solenoid
Pump current out of Damaged or dirty
range pump
Cannot zero instrument Zero air system is
or there is a high faulty, needs new SO
background signal when scrubbers or requires
sampling zero air. (Zero maintenance.
air should produce a
reading equivalent to
less than 15 ppb SO .)
2
Zero air flow rate is
inadequate
Instrument is not
drawing in zero air
Span gas containing
SO
hydrocarbon is
contaminating system
Internal or external
lines, filters and other
sample handling
equipment are
contaminated or dirty
Hydrocarbon kicker
has failed
High scattered light
Possible Cause
If Micro SD card was just replaced, re-
install the old one. If the problem is
fixed, request a replacement Micro SD
card.
Reset solenoid via Settings>Health
Check>Status and Alarms>Valve and
Pump Resets screen. If damaged,
replace solenoid valve block.
Reset pump via Settings>Health
Check>Status and Alarms>Valve and
Pump Resets. Inspect and refurbish
pump. If pump motor is damaged,
replace pump.
Test against an ultra-zero cylinder from
a reputable scientific gas supplier or
2
check effect of a new chromatography
grade activated charcoal scrubber
installed at the instrument inlet.
Check by-pass or atmospheric pressure
vent to verify that the zero air system is
providing more flow than the instrument
is drawing.
Check the sample flow and pressure 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.
Verify that span gases connected to the
, NO or calibration system are shut off and leak-
2
tight.
Replace inlet filter (if installed) and as
much as possible.
Replace the hydrocarbon kicker.
Toggle the "Flash Lamp" off in the
Settings>Measurement
Settings>Advanced Settings>Flash
Action
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