Specifications; Electrical - AEMC 4620 User Manual

3.1

Electrical

Measurement Range: Auto-ranging 0 to 2000Ω
Range
Measurement
Resolution
Test Current
Accuracy
Open Voltage
Operating Frequency: 128Hz square wave
Max. Auxiliary Rod Resistance:
Range
Current Circuit
Voltage Circuit
Response Time: 4 to 8 seconds approx for a stabilized measurement
Interference:
The Models 4620 & 4630 are designed to reject high levels of interference
voltage (DC, 50/60Hz, harmonics)
• DC voltage in series with X: 20V
• AC voltage in series with Y: 13V peak (@ 16.67, 50, 60, 400Hz)
• AC voltage in series with Z: 32V peak (@ 16.67, 50, 60, 400Hz)
Accuracies and specifications are given for an ambient temperature of 23°C ±3°K, RH of
45 to 55%, battery power at 9.5V, auxiliary resistance at the measurement terminals = 0, no
stray voltage, an electrical field < 1V/m, and a magnetic field from 0 to 40A/m.
Voltage Detection Range: 20 to 250V
or between the Xv and Z terminals.
Frequency: DC at 450Hz
Voltage Withstanding: Both models are fuse protected. In the event of a
system fault, the units can withstand 250V
Fuse Protection: High breaking capacity - 0.1A, >250V, 0.25 x 1.25"
Digital Ground Resistance Tester Model 4620 and 4630
CHAPTER 3

SPECIFICATIONS

20Ω
0 to 19.99Ω
10mΩ
10mA
2% of Reading ± 1ct
20Ω
3kΩ
200Ω
20 to 199.9Ω
100mΩ
1mA
<42V peak
200Ω
30kΩ
50kΩ
between the X and Z terminals
AC
or 100V
AC
2000Ω
200 to 1999Ω
1Ω
0.1mA
± 5% of Reading ± 3cts
2000Ω
50kΩ
.
DC
11