Fluke Calibration RUSKA 7615, User Manual

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Maintenance
Calibration
6
6-7
Note
If the actual pressure applied is outside of the tolerance for the
requested high-point pressure, Error—222 Data out of range will occur.
Acknowledge this error by selecting
OK , then re-enter the actual pressure,
repeating Step 3, number 1, if necessary
Step 4
1. To begin Step 4, use the calibration standard to again Apply the mid-point pressure
of the range of the sensor being calibrated requested by the Calibrator. As pressure is
admitted into the Test Port, the Measured pressure on the Calibrator’s screen will
change accordingly.
2. When the Measured pressure stabilizes, use the Calibrator’s numeric keypad and OK
to enter the actual pressure reported by the calibration standard. Do not enter the
Measured pressure reported by the Calibrator . If necessary, use the CLEAR key to
correct a mistake in the edit field. If the actual pressure applied is acceptable, the
Calibration Complete screen will appear.
Storing the Coefficients
Note
In addition to saving the calibration coefficients to the Calibrator’s memory,
the user is advised to separately record the calibration coefficients and
store this “backup” in a safe place.
Step 5
Calibration is complete. To exit the calibration procedure without storing the calibration
coefficients in memory, press CANCEL . To store the calibration coefficients in memory,
select OK .
Step 6
Press PREV to return to the main screen.
Once the calibration procedure is complete, the user is advised to record several pressure
readings. If there are any significant errors at these points, then an error was probably
made in generating one of the calibration pressures, and the calibration procedure should
be repeated.
Editing the Calibration Coefficients
If the Calibrator’s memory is erased but the calibration coefficients are known, the user
can restore the coefficients to the Calibrator by following the directions below.
W
Caution
Never randomly adjust the calibration coefficients. Only
qualified personnel with valid backup data should be allowed to
edit the coefficients. If the backup coefficients are questionable,
perform the calibration procedure in its entirety.
1. Verify that the Calibrator is in Measure mode (Chapter 4).
2. To go to the Calibration screen, select MENU/CAL .
3. To edit the calibration coefficients, press the recessed CAL button beneath the
vacuum fluorescent display. If the calibration access code is enabled, enter it at the
prompt. The Calibration, Step 1 , screen will appear.