Teledyne 3300TB, Operating Instructions Manual, Page: 38 / 51

Trace Oxygen Analyzer Operation
Teledyne Analytical Instruments 25
1. Press and then release the SET HI RANGE and the SET LO
RANGE buttons simultaneously.
2. Within 5 seconds, press either the D or Ñ button until Auto,
Lo, or Hi displays on the LCD, as desired.
After about three seconds, the analyzer resumes monitoring in the
selected range mode.
Note: If the concentration exceeds 9999 ppm oxygen, the
analyzer will automatically switch to the Calibration Range,
EVEN THOUGH INSTRUMENT IS IN THE FIXED RANGE
MODE.
4.6 Calibration
Preliminary—If not already done: Power up the Analyzer and allow
the LED reading to stabilize. Set the Alarm setpoints and the fullscale
ranges to the desired values.
Procedure:
1. Expose the sensor to ambient air or instrument grade air
(20.9 % oxygen). Allow time for the sampling system to
purge and the analyzer to achieve equilibrium.
Note: If the analyzer output goes above the high alarm setpoint
or below the low alarm setpoint, the display will go blank
and the front panel ALARM Indicator, beneath the SET
Function buttons, will blink. Hold down the SPAN button
until the ALARM Indicator stops blinking.
2. Press the SPAN button once.
3. Within 5 seconds press either the D or Ñ button until the
display is stable and reads 20.9 %.
The unit is now calibrated.
Note: If you use a span gas other than air, do not span in the
0-10 ppm range. Calibration at this level is not dependable.
Note: If you use a span gas other than air, and the span gas
oxygen concentration is less than 10,000 ppm, the
analyzer could take up to 65 seconds to to settle. The lag
is caused by a digital filter that is active only below
10,000 ppm (1%) oxygen.