Teledyne Analytical Instruments5-8
5 Maintenance & 5 Maintenance &
5 Maintenance & 5 Maintenance &
5 Maintenance & TT
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leshooting Model 356WModel 356W
Model 356WModel 356W
Model 356WAA
AA
A
No analyzer response to
oxygen.
Cell lacks sensitivity.
a) Poor electrical connection,
or F1 fuse (a standard 2
amp Slo-Blo fuse) has
blown.
b) Cell electrolyte level too
low.
c) Dirty cell.
d) Short between cell cathode
and anode (the screen to
lead [the base material] is
shorted.)
e) If d) above corrects the
problem, the cell has
probably been poisoned,
probably by fluid flowing into
the cell humidifier column.
f) Cell has been poisoned by a
component in the sample.
a) Cell electrolyte level too low
due to misadjusted or faulty
humidity control.
b) Cell electrolyte too high,
due to misadjusted or faulty
humidity control.
c) Faulty humidity control.
a) Verify proper connection
from the cell through the
control unit to the external
recorder or meter; check for
blown fuse. Replace as
necessary.
b) Inspect electrolyte level and
add as necessary. See
Section 4.2.3, item 4.
c) Remove cell and clean
thoroughly. See Section
4.2.3.
d) Correct short. Refill with
fresh electrolyte as needed.
e) Check for excessive flow-
rate.
Check for excessive foam-
ing in the humidifier column.
Drain and clean reservoir as
necessary. Refer to Section
5.8.
f) If there has been no change
in the normal sample
composition, a scrubber
may be required to remove
the offending component.
a) Add electrolyte as neces-
sary. Adjust humidity
control. See Section 4.5.
b) Drain electrolyte and refill.
Adjust humidity control. See
Section 4.5.
c) • Shut off main power.
• Disconnect orange wire
from TS1 terminal 5,
place a voltmeter (set to
AC current, range 0–100
mA) in series with TS1-5
and the disconnected
orange wire.
CAUTION: High voltage AC
present.
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