Baker Hughes Panametrics oxy.IQ, Руководство пользователя

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Chapter 3. Initial Setup and Operation
12 oxy.IQ User’s Manual
3.3.3.2 Recalibrating an Existing Sensor
For an existing sensor, continue the air calibration procedure as follows:
1. Press the Enter key to select the NO menu option.
2. As instructed, remove the sensor manifold to expose the oxygen sensor to ambient air for about two minutes.
Then, press the
Enter key to continue.
3. 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.
3.3.4 Span Gas Calibration
Before beginning the span gas calibration, make sure the oxy.IQ is indicating an O
2
level less than the span gas value,
to ensure an accurate calibration. Then, start the flow of the span gas to the sensor. For accurate calibration, the
span gas should have an oxygen content of 70-90% of the range being calibrated.
To perform the span calibration, complete the following steps:
1. Use the equation below to calculate the expected mA output that corresponds to the known oxygen content of
the span gas:
For example, if the span gas contains 80 ppm oxygen and the 0-100 ppm range is being calibrated, the analog
output should equal 4 + 16 x (80/100) = 16.8 mA.
2. If you have not done so already, start the flow of span gas to the sensor and allow both the 4-20 mA output
reading and the display reading to stabilize.
3. After the reading has stabilized, press the Enter key to enter the Main Menu .
4. Press the Enter key to enter the Calibration menu.
5. Press the key and then press the Enter key to select the Span Gas menu option.
6. Press the and keys until the measurement agrees with the span calibration gas value.
7. Confirm that the reading on the display has stabilized, and press the
Enter key to save the calibration. Then, press the Cancel key twice to return to measurement mode.
4.0 16.0 Span Gas ppm
Full Range ppm
----------------------------

+
mA Output =