Fluke RUSKA 7252, User Manual

Page: 98 / 128

RUSKA 7252
Users Manual
6-6
3. Using your calibration standard, generate the pressure shown in the Apply column.
When the measured pressure stabilizes, use the Calibrator’s numeric keypad to enter
the actual pressure applied by the calibration standard and then press ENTER . 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
within the indicated tolerance, the unit will accept that point and the highlighted
curser will automatically scroll down to the next calibration step.
Note
If the actual pressure is outside of the tolerance for the requested mid-point
pressure, Error —222 Data out of range will occur. Acknowledge this error
by selecting
OK [ F6 ], then re-enter the actual pressure, repeating step 2 if
necessary.
Step 3
1.
Generate the next pressure calibration point requested by the Calibrator. Apply this
pressure using calibration standard and follow the instructions in Step 2, number 3,
entering the actual pressure applied.
2. Repeat this procedure until all of the calibration steps are complete. Review the
Adj. %FS field to see if one point has a significantly higher adjustment required than
other points in the calibration. This may indicate that there was an error in that
specific calibration point. The operator can re-check this pressure point prior to
completing and accepting the full calibration. To re-enter a point, use the rotary knob
and move the highlighted curser to the actual pressure values in the step in question.
Generate the requested apply pressure using the standard and enter then new actual
value when stabilized.
Storing the Coefficients
Step 4
1.
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 the Done key and the Calibrator will calculate all of
its new coefficients.
Note
In additional 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
1.
Press
PREVIOUS
to return to the Main Menu.
2. Once the calibration procedure is complete, the user should verify several pressure
readings against the pressure standard. If there are variances beyond the stated
precision, then an error was probably made in generating one of the calibration
pressures, and the calibration procedure should be repeated.