Fluke 5730A - Calibration Procedures; Calibration Security Passcode; Artifact Calibration

5730A
Calibration Manual
32
Calibration Procedures
This manual provides procedures to calibrate the Product to external standards,
adjust the range if necessary, and do a calibration check.
To maintain traceability, these requirements must be met:
• Complete calibration of the Product to external standards before the start of
any calibration cycle.
• Performance verification must be completed every 2 years.
Calibration Check and range calibration are optional procedures that are
provided to enhance the accuracy if needed for special requirements. See
Calibration Check.
Calibration Security Passcode
The integrity of Product calibration is protected by a security passcode that must
be entered before new calibration constants can be saved to non-volatile
memory. This passcode replaces the hardware calibration switches found on
older calibrators such as the Fluke 5720A. As with the 5720A, the passcode also
protects the ability to set the date for the internal real-time clock.
If the passcode has not been entered, the Product is secured. Once the
passcode is entered, the Product is unsecured. The Product secures itself when
it is reset or when the setup menus are closed. The Product can be unsecured at
any time over the remote interface with the CAL_SECURE command and by
entering the passcode. The front panel prompts for the passcode to unsecure the
Product before it can accept new values to be eventually stored.
The passcode contains 1 to 8 decimal digits. The Product is shipped with the
passcode set to "5730". To change the passcode, touch Setup
Menu>Calibration>Change Calibration Passcode. The Product prompts for
the current passcode and then the new passcode. The passcode can also be
changed over the remote interface with the CAL_PASSWD command.
If the passcode for a particular Product is lost, contact Fluke Customer Support.
See How to Contact Fluke Calibration.
Artifact Calibration
The Product must be calibrated to external standards at the beginning of the
calibration cycle. The length of the cycle (24 hours, 90 days, 180 days, or one
year) is selected in a Setup Menu described in Chapter 4 of the Operators
Manual.
To calibrate the Product, apply these portable standards to the output binding
posts:
• 10 V dc voltage standard
• 1 Ω resistance standard
• 10 kΩ resistance standard