Chapter 2 — Getting to Know the DRM-100
Page 11
This mode can be used for troubleshooting equipment
under test.
Current versus Resistance Ranges
The maximum voltage that can be measured on the DRM-
100 voltage inputs is slightly over 2V, and it is this that
limits the maximum resistance value that may be read.
This allows measurement of higher resistances at lower
currents. The relationship between the selected test
current and the maximum possible resistance value is
shown below. The maximum value will vary between
instruments and individual measurements and depends
upon the DC offset voltage measured before the
beginning of each test.
10A over 200
m
Ω
20A over 100
m
Ω
30A over 67
m
Ω
40A over 50
m
Ω
50A over 40
m
Ω
60A over 33
m
Ω
70A over 28
m
Ω
80A over 25
m
Ω
90A over 22
m
Ω
100A over 20
m
Ω