Fluke RUSKA 7750i User Manual page 79

Step 2
1. To begin step 2, use the calibration standard to apply the various pressures that will
be requested by the RUSKA 7750i. The screen will display a table noting the
following information.
Step The pressure step in the calibration sequence
Apply The pressure that the standard is to generate to the ADTS.
Tolerance The tolerance about the apply value that can be generated by the
standard and still accepted by the ADTS.
Actual The actual pressure value that was generated by the standard when
the point was accepted.
Adj. %FS Depicts the amount that the ADTS corrected its output to align to
the standard. This is used as a trouble-shooting tool. 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.
2. The Step 1, actual value will be highlight. This is your first pressure point in the
calibration procedure.
3. Using your calibration standard, generate the pressure shown in the Apply column.
When the measured pressure stabilizes, use the ADTS'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 ADTS. 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.
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, number 1, if necessary.
Step 3
1. Generate the next pressure calibration point requested by the ADTS. 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.
Note
6
Maintenance
Calibration
6-5