Teledyne 306WA - Analog trace oxygen analyzer - Manual (Page 21)

4-5
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 Operations 4.0 Operations 4.0 Operations 4.0 Operations 4.0 Operations 4.0
TELEDYNE ELECTRONIC TECHNOLOGIES
Analytical Instruments
NOTE: The silver screens in the cell have been specially treated to pro-
vide proper detection characteristics. They must be kept clean and
MUST NOT be touched. Even clean fingers secrete natural oils
which contaminate the screens. If the screens need straightening,
wash a small pair of tweezers thoroughly to remove any grease,
rinse them in distilled water, and use them to carefully bend the
screens back into place.
4.3 4.3 4.3 4.3 4.3 Calibrator Calibrator Calibrator Calibrator Calibrator
The calibrator is located at the top of the humidifier column as shown
in Figure 6. Also refer to Figure 8.
1) Disconnect the electrical leads attached to the terminal posts.
2) Remove the two screws adjacent to the terminal posts. Remove
the assembly, being careful to avoid touching the calibrator wick
against other surfaces.
3) Dip the wick into fresh electrolyte solution and then shake to
remove excess solution. Blot the end of the wick with an
absorbent tissue.
WARNING: Type A electrolyte is caustic. Use extreme care in
handling. Protective equipment including but not
limited to gloves and safety glasses should be worn
while handling electrolyte. Refer to the Material Safety
Data Sheet in the Appendix regarding potential hazards
and corrective action in case of accident.
4) Carefully slide the calibrator assembly back into the humidifier
block cavity and secure with two mounting screws. The screws
must be turned down firmly to insure a leak-free O-ring seal
between the assembly and the humidifier block.
5) Reconnect the electrical leads to the terminal posts.
CAUTION: The calibrator wick and electrodes must be kept clean
and must not be touched. Contamination will result in
calibration errors.
4.4 4.4 4.4 4.4 4.4 Throttle Valve Throttle Valve Throttle Valve Throttle Valve Throttle Valve
The throttle valve is located at the top of the reservoir tank. Refer to
Figure 6.
1) Gently turn the valve counterclockwise. A stream of bubbles
should appear at the base of the humidifier column, and the float
of the flowmeter should rise in its tube.