METREL MI 3250, Instruction Manual

Page: 36 / 37

MI 3250 MicroOhm 10A Technical specification
36
8 Technical specifications
8.1 Resistance measurement
Test current Resistance Range Resolution Accuracy
10 A
0000,0
… 2000,0 µΩ
0,1
µΩ
00,000
… 20,000
mΩ
1
µΩ
±(0,25% Rdg + 0,01%FS)
000,00
… 200,00
mΩ
10
µΩ
1 A
00,000
… 20,000 mΩ
1
µΩ
000,00
… 200,00
mΩ
10
µΩ
±(0,25% Rdg + 0,01%FS)
0,0000
… 2,0000
Ω
100
µΩ
100 mA
000,00
… 200,00
mΩ
10
µΩ
0,0000
… 2,0000 Ω
100
µΩ ±(0,25% Rdg + 0,01%FS)
00,000
… 20,000 Ω
1
mΩ
10 mA
0,0000
… 2,0000 Ω
100
µΩ
00,000
… 20,000 Ω
1
mΩ ±(0,25% Rdg + 0,01%FS)
000,00
… 200,00 Ω
10
mΩ
1 mA
00,00
… 20,00 Ω
10
mΩ ±(1% Rdg + 0,1%FS)
000,0
… 200,0 Ω
100
mΩ ±(1% Rdg + 0,25%FS)
0,000
… 2,000
kΩ
1
Ω
±(1% Rdg + 0,25%FS)
Table 8.1: Resistance measurement ranges and accuracy (reference conditions)
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:
Max. Noise
Level
Test Current
Additional
Error
10 A 1 A 100 mA 10 mA 1 mA
Resistance
Range
20 mV
RMS
50 mV
RMS
250 mV
RMS
2
mΩ
20
mΩ
200
mΩ
20
mΩ
200
mΩ
2
Ω
200
mΩ
2
Ω
20
Ω
2
Ω
20
Ω
200
Ω
20
Ω
200
Ω
2
kΩ
±10
dig
8.2 Measurement parameters
Test Current:
10 A 1 A 100 m A 10 m A 1 m A
Max. Power Output: 20 W 2 W 0,2 W 20 mW 2 mW
Output Voltage:
3 V
DC
max. 1 V
DC
max.
Limits: 1
μΩ … 2 k Ω
Table 8.2: Measurement parameters