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Influences on the Resistance Measurement
Quantities of Influence
Temperature
Relative Humidity
Supply Voltage
Series Mode Rejection,
50/60Hz*
Common Mode
Rejection, 50/60Hz AC
*Example: If the measured resistance is 1mΩ and the measurement current is 10A, an alternating voltage of 1mV RMS
in series with the resistance to be measured will induce an error of not more than 2%.
Power Supply: 6V, 8.5Ah rechargeable NiMH battery pack
Battery Life: Range dependent
Range
10A
1A
100mA
10mA
In Standby or Off
*Established for measurements lasting 5s, every 25s.
3.2
Mechanical
Dimensions:
10.70 x 9.76 x 7.17" (272 x 248 x 182mm)
Weight:
10 lbs (4.5kg approx)
Case Protection:
ABS plastic polycarbonate: watertight to IP64 (cover
closed), water resistant to IP53 (cover open).
Color:
Safety yellow case with gray faceplate
Micro-Ohmmeter Model 6240
Range of use
-10 to +55°C
10 to 85% RH @ 45°C
5 to 7V
U (AC) = (R measured x
I measurement)
0 to 50 V AC
Number of measurements*
850
3500
4500
5000
battery life 4 to 6 months
Variation of the measurement
Typical
0.1% / 10°C
0.5% / 10 °C + 2cts
0.1 %
2cts
< 0.2%
> 80 dB
Maximum
0.5% + 2cts
0.2% / V + 2cts
2% + 1ct
> 60 dB
13
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