4 Calibration Procedures
72 Keysight 34970A/34972A Service Guide
To Unsecure the Instrument Without the Security Code
To unsecure the instrument without the correct security code, follow the steps
below. A front panel procedure to unsecure the instrument is given on page 52.
See “Electrostatic Discharge (ESD) Precautions” on page 174 before beginning
this procedure.
1 Disconnect the power cord and all input connections.
2 Remove the instrument cover (see page 184). Turn the instrument over.
3 Apply power and turn on the instrument.
Be careful not to touch the power line connections.
SHOCK HAZARD. Only service-trained personnel who are aware of the
hazards involved should remove the instrument covers. The procedures in
this section require that you connect the power cord to the instrument with
the covers removed. To avoid electrical shock and personal injury, be
careful not to touch the power-line connections.
– Exposed Mains
–Do not Touch!
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