Fluke Calibration RUSKA 7615, Руководство пользователя

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Maintenance
Calibration
6
6-5
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.
Calibration Instructions—Multi-Ranged Sensor
To calibrate the RUSKA 7615, the user simply connects a calibration standard to the
Calibrator’s Test Port then follows the 4-step calibration procedure on the Calibrator’s
display. Optional pressure ranges are available with the 7615 provided up to six ranges in
a single instrument. Each independent range would be calibrated as a separate pressure
range.
On multi-ranged sensor versions of the 7615, when activating the calibration procedure,
after completing zero, the operator is instructed to select one of the multiple available
pressure ranges that the operator wished to calibrate. The operator then has the option to
define the number of calibration points that they wish to set in an up scale and a
downscale direction. The menu driven calibration procedure then steps the user through
the pressures that are required to calibrate the selected pressure range. The user generates
the defined pressures utilizing an adequate standard to calibrate the 7615. The pressure
steps will vary based on the number of points the operator enters into the 7615. Typically,
it is recommended that the operator select a 3 point up and a 3 point down calibration
adjustment procedure. This would prompt the operator to generate Atmosphere, 50%,
100%, and the 50% of full scale of the range being calibrated (See Chapter 6, Observing
the Calibrator’s Full Scale Rating). Following the actual adjustment to the sensor, it is
recommended to perform a number of verification points to assure that the instrument
was adjusted properly.
Note
The uncertainty of the final calibration must include the uncertainty of the
standard being used.
Preparation
•
Verify that the calibration standard is connected to the Test Port.
•
Verify that the Calibrator has been at stable operating temperature for at least
two hours
•
Verify that the Calibrator is in Measure mode (Chapter 4).
•
Verify that the head height is set to 0.
•
If desired, change the Calibrator’s units of measure (Chapter 4) to match those of the
calibration standard
•
To go to the calibration screen, select MENU/CAL .
•
Connect air supply
To begin the calibration process, 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. The operator will select the sub-range of the
sensor to be calibrated following the zeroing process.
Note
To exit the calibration procedure before the calibration coefficients have
been changed, press CANCEL any time during the procedure.