Bond Resistance / Continuity Measurement; Ground/Earth Measurement - 3-Pole - Fall Of Potential - AEMC 6470 User Manual

3.2.3 Bond Resistance / Continuity Measurement (mW postition)
DC Resistance
Test Voltage:
Maximum Current:
Permanent Overvoltage: Veff = 50V
Inductive Load:
Auto-ranging Time:
Measuring Duration:
Calculation with R comp: R displayed = R measured – R comp
Test Lead Resistance Compensation Limit: 0 < R comp. < 5W
Disturbance Voltage:
Alarm Setting:
2-Wire:
Range
0.01 to 9.99W
10.0 to 99.9W
100 to 999W
1.00 to 9.99kW
10.0 to 99.9kW
4-Wire (Kelvin Sensing):
Range
0.001 to 9.999W
10.00 to 99.99W
100.0 to 999.9W
1.000 to 9.999kW
10.00 to 99.99kW
3.2.4 Ground/Earth Measurement - 3-Pole (3-Point) - Fall of Potential
Test Voltage: 16Vrms or 32Vrms
Test Frequency: See chart
Test Current: ≤250mA
Noise Rejection: > 80 dB (16 2/3, 50, 60 and 400Hz) if the measurement
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Ground Resistance Tester Model 6470
16V
DC
≤ 200mA
voltage until 250V)
2 Henry max
5 s approx
8 s in automatic polarity change
3 s in manual mode
60V peak 42Veff AC sin. max
">"or "<" 1 to 999W on 3 digits
Resolution
0.01W
0.1W
1W
10W
100W
Resolution
0.001W
0.01W
0.1W
1W
10W
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frequency is 20% above or below the disturbance frequency
www.
with load resistance < 20W
DC
max (protection against power supply
AC
.ca
Accuracy
Nominal:
2% of Reading ± 2cts
Field:
5% of Reading ± 3cts
Accuracy
Nominal:
2% of Reading ± 3cts
Field:
5% of Reading ± 5cts
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