Fluke RUSKA 7252, User Manual

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Local Operation
Menu
4
4-19
Menu | Calibrate
The Menu | Calibrate command is used to perform the calibrations on all of the sensors
utilized by the Calibrator. The RUSKA 7252 can be completely calibrated using the front
panel interface. It does not require any external computer or software in order to perform
a successful calibration. It also has the capability of being calibrated remotely through
either the RS232 or IEEE-488 interface. The RUSKA 7252 will guide the operator
through a menu driven calibration procedure identifying the pressures that should be
supplied by a standard. Following the calibration procedure, the RUSKA 7252 calculates
and saves its own coefficients. The calibration coefficients are date stamped so the user
can easily identify the last time the instrument went through a full calibration, when the
coefficients were last edited or when the Calibrator was re-zeroed.
The calibration section in the Calibrator can be password protected to prevent any
unauthorized entry into the calibration section of the system. Refer Chapter 6,
Maintenance, of the manual for more detailed information regarding the calibration of the
Calibrator. The calibration menu is identical in both channels. Press the Sensor function
key to select the correct sensor from either channel.
Calibration Password
The calibration password allows the user to protect access to Calibrator calibration
constants and the calibration procedure. If the calibration password is set to any number
other than zero, it is required before the user is allowed to calibrate the Calibrator or
manually change the calibration constants.
Note
It is recommended that the access password be recorded and filed in a
secure location.
1. The calibration password is set from the
Calibration Menu
. From the
Main Menu
(press
Previous
until the Main Menu appears), press
Menu
[
F6
]
| Calibrate
[
F3
].
2. Press the
Access
[
F4
] key. If there is a password in the system other than 0, then
you must enter the current valid password into the RUSKA 7252 before it will allow
you to modify the password.
3. Use the numeric keypad to enter the new calibration password. Setting the calibration
password to zero allows free access to Calibrator calibration and constants. Press
ENTER
.
4. Press
Yes
[
F4
] to acknowledge changing the calibration password. Press
No
[
F5
] to
reject changing the calibration password.
Zeroing
Fluke recommends that the Calibrator be zeroed once a day to maintain optimal
performance. The zero drift specification is defined in Appendix A under General
Specifications. Refer to Chapter 6, Zeroing, for the zeroing procedure. On gauge mode
instruments, the zeroing procedure automatically ties both test and reference ports of the
RUSKA quartz sensor together and performs the zeroing routine.