72
Chapter 4 Calibration Procedures
Calibration Security
4
3 Apply a temporary short between the two exposed metal pads on the
A1 assembly. The general location is shown in the figure below. On the
PC board, the pads are marked CAL ENABLE.
4 Apply power and turn on the instrument.
WARNING Be careful not to touch the power line connections or high voltages on the
power supply module. Power is present even if the instrument is turned
off.
5 The display will show the message “Calibration security has been
disabled”. The instrument is now unsecured.
6 Turn off the instrument and remove the power cord.
7 Reassemble the instrument.
Now you can enter a new security code, see “To Unsecure and Secure for
Calibration”, on page 41. Be sure you record the new security code.
U101
U102
Pads
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