Fluke RUSKA 7050, User Manual

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RUSKA 7050, 7050i & 7050LP
Users Manual
4-12
Menu | Calibrate
The Menu | Calibrate command is used to perform the calibrations on all of the sensors
utilized by the PPI. The 7050 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 7050 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 7050 calculates and saves the 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 PPI was re-zeroed.
The calibration section in the PPI can be password protected to prevent any unauthorized
entry into the calibration section of the system. Refer to Chapter 6, Maintenance, for
more detailed information regarding the calibration of the PPI.
Calibration Password
The calibration password allows the user to protect access to PPI 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 PPI 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 7050 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 PPI 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 PPI 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.