Teledyne TRACE OXYGEN ANALYZER 356WA - Manual (Page 19)

4-5
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Teledyne Analytical Instruments
6) Connect the red lead to the center terminal and the black lead to
the outer terminal.
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 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 4-1.
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.
2) Adjust the valve so that the flowmeter float is centered in the
flow rate reference indicator.
CAUTION: Open the throttle valve carefully. Excessive flow rate
may cause water in the humidifier column to be carried
into the detector cell. This can cause erratic readings
and may require disassembly, cleaning, and refilling of
the sensor
.
3) The flowmeter indicator has been factory set to a flow rate of
150 cc/min 150 cc/min 150 cc/min 150 cc/min 150 cc/min. for the specified sample gas.
CAUTION: Excessive flow rate may cause water in the humidifier
to be carried to the flowmeter causing moisture to
accumulate. This can cause the ball to stick in the
flowmeter. To remove moisture, remove the flowmeter
and allow to air or blow dry. Refer to the detailed in-
structions in Figure 5-2 for removal and installation of
the column.
4.4 4.4 4.4 4.4 4.4 Humidity Control Humidity Control Humidity Control Humidity Control Humidity Control
The humidity control is located on the front panel of the control unit,
and is adjusted to maintain a constant electrolyte level in the detector cell.
In effect, the control governs the humidity of the sample which is directed
to the cell.