Teledyne 306WA - Analog trace oxygen analyzer - Manual (Page 30)

TELEDYNE ELECTRONIC TECHNOLOGIES
Analytical Instruments
5-6
5.0 Maintenance & 5.0 Maintenance & 5.0 Maintenance & 5.0 Maintenance & 5.0 Maintenance & T T T T Trrrrroub oub oub oub oubleshooting leshooting leshooting leshooting leshooting Model 306W Model 306W Model 306W Model 306W Model 306WA A A A A
adequate sensitivity, the entire cell assembly must be replaced. Refer to
section 4.2.3
4.2.3 4.2.3 4.2.3 4.2.3 for cell installation.
5.7 Calibrator 5.7 Calibrator 5.7 Calibrator 5.7 Calibrator 5.7 Calibrator
The calibrator must be clean in order to operate properly. It should be
removed and inspected each time the cell is serviced. If, on inspection,
dark deposits are seen on the calibrator wick, the calibrator should be
replaced. See section 4.3: Calibrator
4.3: Calibrator 4.3: Calibrator 4.3: Calibrator 4.3: Calibrator.
The scrubber is not repairable. Once it has been determined that it is
not functioning correctly, it should be replaced. To determine if the scrub-
ber is active or not:
1. Allow sample gas with a few PPM of O
2
into the sensor. Record
the output registered on the meter
2. Turn the scrubber on and allow zero gas into the sensor. Record
the output.
3. If the output in 1 and 2 are the same, the scrubber needs to be
replaced.
5.8 Reservoir and Humidifier Column 5.8 Reservoir and Humidifier Column 5.8 Reservoir and Humidifier Column 5.8 Reservoir and Humidifier Column 5.8 Reservoir and Humidifier Column
Approximately once each year the reservoir and humidifier column
should be drained and cleaned. Use the following procedure:
a) Reduce sample flow to approximately 50 cc/min 50 cc/min 50 cc/min 50 cc/min 50 cc/min.
b) Refer to Figure 6. Place a small funnel with attached tubing
beneath the drain spout which is located on the underside of the
reservoir. Remove the drain spout cap and allow the reservoir
and humidifier column to drain thoroughly.
c) Replace the drain spout cap, turn the sample flow off, and
remove the fill cap on the top of the reservoir.
d) Add a small amount of electrolyte to a pint of warm distilled
water. Pour the solution into the reservoir and replace the fill
cap.
e) Gently open the throttle valve and permit the sample to flow for
five to ten minutes.
f) Reduce the sample flow to 50 cc/min 50 cc/min 50 cc/min 50 cc/min 50 cc/min. and drain the solution
from the reservoir. When drained, replace the drain cap and
turn off the sample flow.
g) Rinse by filling with distilled water and draining several times.