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3.4
Influence of Stray Voltage
Test
Current
50 mA
10 mA
2 mA
2
20
2 kΩ 20 kΩ
200
Range
Table 2
Shaded areas indicate the ranges in which measurements can be
performed, where 40V, 50/60Hz peak-to-peak stray voltage is present,
without obtaining error levels representing more than 0.5% of the
measurement range.
3.5
Influence of Auxiliary Resistances
In the absence of stray signals, the maximum values for (Rx+Rz) which will
allow measurements to be performed, are those indicated within Table 3.
Range
2Ω
20 Ω
200 Ω
2 kΩ
Current
20 k Ω
(*)
50 mA
Rx + Rz = 600Ω max
10 mA
Rx + Rz = 4000Ω max
(*)
2 mA
Rx + Rz = 20 kΩ max
(*)
Do not use
Table 3
* Even if auxiliary resistance of Rz = 0, the maximum reading is < 2000-counts on these three
ranges (voltage limiting circuit at output terminals).
12
Digital Ground Resistance Tester Model 4500