Calibration Procedures 4
Keysight 33210A Service Guide 79
2 Disassemble the instrument using the “General Disassembly Procedure” on
page 123.
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.
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 44. Be sure you record the new security code.
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.
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