METREL MicroOhm 2A MI 3242, Instruction Manual

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MI 3242 MicroOhm 2A
Technical specification
38
10 Technical specifications
10.1 Resistance measurement
Test current Resistance range Resolution Accuracy
0.000 … 9.999 m Ω 1 µ Ω
10.00 … 99.99 m Ω 10 µ Ω
2 A
100.0 … 999.9 m Ω 100 µ Ω
0.00 … 99.99 m Ω 10 µ Ω
100.0 … 999.9 m Ω 100 µ Ω
1.000 … 9.999 Ω 1 m Ω
100 mA
10.00 … 19.99 Ω 10 m Ω
0.0 … 999.9 m Ω 100 µ Ω
1.000 … 9.999 Ω 1 m Ω
10.00 … 99.99 Ω 10 m Ω
10 mA
100.0 … 199.9 Ω 100 m Ω

(0.25 % of r 2 digits)
Table 10.1: Resistance measurement ranges and accuracy
Test current accuracy ............... ±10% (smoothed DC)
Test duration............................. 1 s (single mode)
Test method.............................. 4-wire measurement
Note:

All data regarding accuracy is given for nominal (reference) environment
condition and forward and reverse measurements.

Inductive mode will introduce an undefined error if an EMF is present on the test
object.

The error in operating conditions could be at most the error for reference
conditions (specified in the manual for each function)
+
0.1% of measured
value + 1 digit, unless otherwise specified in the manual for particular function.
Noise rejection (50/60 Hz) on potential leads P1 - P2:
Test current Max. noise level Additional error
2 A 1.4 A
RMS
(R
x
< 500 m Ω )
100 mA 70 m A
RMS
(R
x
< 10 Ω )
10 mA 7 m A
RMS
(R
x
< 100 Ω )
≤ 0.5 %