Tektronix VX4101A - page 468

Appendix A: Specifications
A–22 VX4101A MultiPaq Instrument User Manual
NOTE. Percents listed above are percents of reading. Instrument set up is as
follows:
Autozero On, after 20 minute warm-up.
The above specifications are for 4-wire W.Add 50 MWto all specifications for
2-wire ohms.
Tcal is the calibration temperature (18 to 28° C). Specifications are for Tcal
±3° C. Multiply the total temperature coefficient by the difference between the
actual operating temperature and Tcal ±3° C.
For the 300 MWrange, the measured resistance in MW multiplied by the
temperature difference in °C is limited to 1000, for example, at 100 MW the
temperature drift specification is only valid for a temperature difference of
10 °C.
Add 0.002% of the range setting to the first reading following a range change.
For Autozero Off, do the following:
For daily and long term drift, add 500 mW/Day for the 30 W range, 1 mW/ Day
for the 300 W range, 100 kW/ Day for the 300 mWrange, and 0.0001% of range
for the other ranges.
For temperature drift, increase the second part of the temperature coefficient by
a factor of 4, for 300 kW range or lower (increase 1.5 mW to 6 mW,2.5 mW to
10 mW, etc.) .
Table A–53: Resistance Input Protection-All Ranges
Terminals DC and AC/RMS AC Peak
R+ to R– 250 V 250 V
R+ to chassis 350 V 450 V
R– to chassis 350 V 450 V
NOTE. For Common Mode Rejection, see DCV Specifications.
Table A–54: DC Current
Range Maximum Reading Resolution
150 mA ±150.000 mA 0.5 A
1 A ±1.00000 A 5 A