Teledyne 316RA / RB / RAD / RBD - Oxygen analyzers - Manual (Page 18)

TELEDYNE ANALYTICAL INSTRUMENTS
14
Model 316RA/RB/RAD/RBD Trace Oxygen Analyzer
Troubleshooting
Most problems that may occur can usually be resolved by verifying
instrument setup against the procedures provided in the “Installation &
Start-Up Procedures” section. If this does not result in proper operation of
the Series 316, the following checks in this section are to be made. If the
problem still cannot be resolved, contact TAI. If you cannot identify the
problem, or if you cannot resolve the problem after following the correc-
tive procedure, call a service representative.
No response from meter.
Meter gives wrong reading.
Analyzer will not span to CAL
mark (or 20.9) when using
ambient air to span.
Analyzer reads over 1000
ppm at Electrical Start-Up.
Symptom Correction
a) Check fuse.
b) Check for ±15 VDC at test
points on oxygen amplifier
PCB (B-32129), or the E/I
power supply PCB (A-9306)
if the current output option
is installed.
a) Turn power off. Check
mechanical zero (analog
meter only).
b) Turn power on. Let reading
stabilize. Increase flow rate
to 4 SCFH and watch
meter. If the reading de-
creases, find and correct
leak. If reading increases,
look for a restriction in
sample lines or vent. Open
shutoff valve completely.
a) Make sure correct sensor
class installed.
b) Replace sensor.
a) Wait a little longer until
reading completely stabi-
lizes. If the reading is still
high, replace sensor.
c) Check output at A1 and A2
(pin 6) on the oxygen
amplifier PCB (B-32129). If
no output, call TAI.
c) Turn power off, remove
wires from terminals 1 and 2
on the small terminal strip
on the oxygen amplifier
PCB (B-32129) and short
together. Turn power on
and set range to X1. Meter
should read 0. Reconnect
terminals 1 and 2 and allow
reading to stabilize. If
reading is still incorrect,
replace sensor.