four when the 25/second reading rate is selected. Resolution versus
range and reading rate are shown in Table 1.
Resistance Measurements
The resistance mode operates by forcing a calibrated value of
current through the unknown resistance and measuring the consequent
voltage drop. The ohmmeter is autoranging and will select either the
200 W,2kW,20kW, 200 kW,or2MW range depending on the value
of the unknown resistance being measured. It may also be fixed on any
range. Reading rates of 6 readings per second or 25 readings per
second may be selected. Software features also permit displaying a
computed value which is a function of resistance, using user-entered
values of offset and scale parameters. The DCX-127 input
configuration permits making these resistance measurements on either
a 2-wire or 4-wire basis.
Description Resistance Measurements
DCX-127 Multifunction Module User’s Guide Page 3
Range
Resolution
6/s Rate
Resolution
25/s Rate
200 mV 10 uV 50 uV
2 V 100 uV 500 uV
20 V 1 mV 5 mV
200 V 10 mV 50muV
500 V 100 mV 500 mV
Table 1. Reading rate for various ranges
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