Baker Hughes Panametrics oxy.IQ, User Manual

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oxy.IQ User’s Manual 11
Chapter 3. Initial Setup and Operation
3.3.2.3 Trimming the Analog Output High (20 mA) End
1. Press the key and then press the Enter key to enter the 20 mA Trim menu, and the analog output is driven
to about 20 mA.
2. Use the and keys to adjust the analog output up or down, until it equals 20.00 ± 0.01 mA.
3. Press the Enter key to save the trim adjustment and return to the Trim menu.
3.3.2.4 Completing the Trim Procedure
1. Repeat both the low (4 mA) end and high (20 mA) end analog output trimming steps until no further trimming
adjustments are required.
2. Press the Cancel key twice to return to the Main Menu .
3.3.3 Air Calibration
An air calibration is always recommended upon installation of a new oxygen sensor. However, because of the
non-linearity of the oxygen sensor, a span gas calibration (see the next section) should also be performed to ensure
more accurate readings in the ppm ranges.
To perform an air calibration, complete the following steps:
1. Press the Enter key to enter the Main Menu .
2. Press the Enter key to enter the Calibration menu.
3. Press the Enter key to select the Air menu option.
Proceed to the appropriate section, depending on whether you are calibrating a new sensor or recalibrating an
existing sensor.
3.3.3.1 Calibrating a New Sensor
For a new sensor, continue the air calibration procedure as follows:
1. Press the key and then press the Enter key to select the YES menu option.
2. Press the Enter key to acknowledge that you are resetting the sensor lifetime clock .
3. As instructed, remove the sensor manifold to expose the new oxygen sensor to ambient air for about two
minutes. Then, press the
Enter key to continue.
4. A message indicating that the calibration is in progress will be displayed, and then the calibration data will be
shown. At that time, press the
Enter key to save the calibration data and return to measurement mode.
Note: A second calibration of the new sensor should be performed within 1-2 days of the first calibration.
CAUTION!
The useful life of ppm sensors will be extended by minimizing exposure of the sensor to
air.