Teledyne 306WA - Analog trace oxygen analyzer - Manual (Page 35)

5-11
TELEDYNE ELECTRONIC TECHNOLOGIES
Analytical Instruments
T T T T Trace Oxyg race Oxyg race Oxyg race Oxyg race Oxygen Anal en Anal en Anal en Anal en Analyz yz yz yz yzer er er er er Maintenance & Maintenance & Maintenance & Maintenance & Maintenance & T T T T Trrrrroub oub oub oub oubleshooting 5.0 leshooting 5.0 leshooting 5.0 leshooting 5.0 leshooting 5.0
Symptom Symptom Symptom Symptom Symptom Cause Cause Cause Cause Cause What What What What What T T T T To Do o Do o Do o Do 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 TS5-5 and orange
wire.
• Change the voltmeter
function to 200V AC.
• Place the voltmeter
across TS5-5 and TS5-4.
• Watching the meter, turn
the humidifier control
knob cw and watch the
voltmeter read from 0 to
120V AC (0-220V for
220VAC Application).
• If not, replace R2 (behind
the control knob); see
paragraph below.
• If there is voltage, replace
the heater element; see
paragraph below.
Faulty humidity control (contin-
ued.)
Cell lacks sensitivity (contin-
ued.)