GE moisture.IQ, User Manual

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moisture.IQ User’s Manual 89
Chapter 7. Maintenance
7.2 Replacing and Recalibrating Moisture Probes
For maximum accuracy you should send moisture probes back to the factory for recalibration every six months
to one year, depending on the application. Under severe conditions you should send the probes back for
recalibration more frequently; in milder applications you do not need to recalibrate probes as often. Contact a
BHGE applications engineer for the recommended calibration frequency for your application.
When you receive new or re-calibrated probes, be sure to install and connect them as described in
“Configuring the Probes” on page 59 . After you have installed and connected the probes, enter the calibration
data as described in “Calibrating the Probes” on page 66. Note that each probe has its own Calibration Data
Sheet with the corresponding probe serial number printed on it.
You do not have to enter calibration data for the Moisture Image Series Probes (
MISP
) if you returned the
MISP2
probe, or in the case of the original
MIS
probe, both the sensor and the electronics module to the factory for
recalibration. However, you should verify that the calibration data entered at the factory is correct (see “The
Probe Configuration Screen” on page 60 ). If you sent only the sensor part of the original Moisture Image Series
probe to BHGE (without the module), you must enter the calibration data manually.
7.3 Calibrating the Delta F Oxygen Cell
You should calibrate the Delta F Oxygen Cell when you initially receive it. After that, calibrate the oxygen cell
once a month for the first three months, and then as needed. You should also calibrate the oxygen cell if you
change the electrolyte.
Calibrating the oxygen cell involves three steps:
•
Displaying the oxygen content in PPMv and μA
•
Checking the oxygen cell calibration
•
Entering the new span value
7.3.1 Displaying Oxygen Content in PPMv and μ A
1. Determine the channel to which the Delta F Oxygen Cell is connected.
2. If you are not displaying oxygen data, configure the channel as described in “The Probe Configuration
Screen” on page 60 .
Note:
A “Channel Not Installed” message appears if you select a channel where no channel module is installed.
Select a different channel.