Test Considerations - Agilent Technologies U3401A User's Manual And Service Manual

4 Performance Test

Test Considerations

For optimum performance, all procedures should comply with the
following recommendations:
• Ensure that the calibration ambient temperature is stable and between
• Ensure ambient relative humidity is less than 80%.
• Allow a 30 minutes warm- up period with a Shorting Plug connected to
• Use shielded twisted pair PTFE- insulated cables to reduce settling and
• Connect the input cable shields to earth ground. Connect the calibrator
Please ensure that the calibration standards and test procedures used do not introduce
N O T E
additional errors. Ideally, the standards used to verify and adjust the instrument should be
an order of magnitude more accurate than each instrument range full-scale error
specification.
60
18°C and 28°C. Ideally the calibration should be performed at
23°C ±1°C.
the Hi and Lo input terminals.
noise errors. Keep the input cables as short as possible.
Lo source to earth ground at the calibrator except where noted in the
procedures. It is important that the Lo to earth ground connection be
made at only one place in the circuit to avoid ground loops.
U3401A User's and Service Guide