2 Calibration Procedures
42 Keysight DAQ970A/DAQ973A 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 40.
See “Electrostatic discharge (ESD) precautions” on page 19 before beginning this
procedure.
1 Dissemble the instrument to remove the instrument cover (see page 29).
2 Turn the instrument over and locate the two exposed metal pads (TP601 and
TP602) as shown below:
3 Apply a short between the two exposed metal pads (TP601 and TP602) using a
jumper wire.
4 Replace the instrument cover, apply power, and turn the instrument on; the
instrument will generate an error and beep (this is normal). Wait 30 to
40 seconds for the instrument to power up completely.
CAUTION
This procedure should be performed by qualified service personnel only.
Turn off the power and remove all measurement leads and other cables,
including the power cord, from the instrument before continuing.
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