4 Calibration Procedures
92 Keysight 34970A/34972A Service Guide
–10 VDC Adjustment Procedure (Optional)
The –10 VDC calibration electronically enhances the Internal DMM’s
a-to-d converter linearity characteristic. This adjustment should ONLY be
performed after servicing the A-to-D converter or replacement of the calibration
RAM.
You will need a 34901A 20-Channel Multiplexer to perform the following
procedures (see page 69). Install the Multiplexer in slot 200.
1 If a zero calibration has not been performed recently, perform one before
beginning this procedure (see page 88).
2 Select Channel 210. Configure the channel as follows:
DC VOLTS
10 V range
6½ digits
INTEG 100 PLC (in the Advanced menu)
INPUT R > 10 G (in the Advanced menu)
Before executing each test, you must press to enable reading monitoring
on the selected channel (or use the ROUTe:MON command from the remote
interface).
3 Measure and note the voltage offset present at the end of the measurement
cable by shorting the ends of the Channel 210 measurement cable. Be sure to
use a copper wire and allow enough time for the residual thermal offset to
stabilize (usually about 1 minute).
4 Connect the input cable to the calibrator output and set the calibrator to
output +10V. Allow enough settling time for any thermal offset voltages to
stabilize (usually about 1 minute).
5 Perform a +10V DC gain calibration. Press
to enter the calibration
menu. Press
again to begin the adjustment procedure.
To Next Page
Loading...
Need help?
General
