Teledyne 356WA Instruction Manual page 31

T T T T T race Oxyg race Oxyg race Oxygen Anal race Oxyg en Anal en Analyz en Anal
race Oxyg en Anal
Symptom Symptom Symptom
Symptom Symptom
Cell lacks sensitivity (contin-
ued.)
yz yzer er er er er yz yz Maintenance & T T T T T r r r r r oub Maintenance & Maintenance &
Maintenance & Maintenance &
Cause Cause Cause
Cause Cause
Faulty humidity control (contin-
ued.)
Teledyne Analytical Instruments
oubleshooting 5 oub oub leshooting 5 leshooting 5 leshooting 5
oub leshooting 5
What What T T T T T o Do What o Do o Do o Do
What What o Do
• Turn humidifier control
completely counter-
clockwise.
• Turn on main power.
• While watching the
voltmeter, turn the
humidifier control clock-
wise; the meter reading
should go from 0–50
milliamps. If not, replace
the humidifier heater
element or the humidifier
heater control. To deter-
mine which should be
replaced, see paragraph
below.
If there is no current, either
the humidifier element or
control is defective. To
determine which it is:
• Turn the humidifier control
knob fully ccw.
• Disconnect the voltmeter
from TS1-5 and orange
wire. Reconnect the
orange wire.
• Change the voltmeter
function to 200V AC.
• Place the voltmeter
across TS1-5 and termi-
nal TS1-4.
• Watching the meter, turn
the humidifier control
knob cw and watch the
voltmeter read 0–110 to
120V AC.
• If not, replace R2 (behind
the control knob); see
paragraph below.
• If there is voltage, replace
the heater element; see
paragraph below.
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