AEMC 4500 - 3 Specifications; Electrical Specifications

Digital Ground Resistance Tester Model 4500 9
CHAPTER 3
SPECIFICATIONS
3.1 Electrical Specifications
Reference Conditions: 23°C±3K,30to50%RH;powersupply-12V±0.2V;noelectricalor
magneticeld,noauxiliaryrodresistance,nonoisevoltage.
NOTE: Specicationsgivenfor60Hzdistributionsystems;if50Hz,consultfactory.
2Ω
1mΩ
10mA or
50mA
20Ω
10mΩ
200Ω
0.1mΩ
2000Ω
1Ω
2mA or
10mA
20kΩ
10Ω
2mA or
10mA
Ranges
Resolution
Recommended
Current Ranges
2mA, 10mA,
or 50mA
Maximum Output Voltage: 38Vrms
Accuracy (see chart on following page):
±2% of Reading ± 1ct from 10% to 100% of range
Test Current Ranges: 2mA, 10mA, 50mA
Maximum Auxiliary Electrode Resistance:
Ry: 50kΩ on 20Ω, 200Ω, 2000Ω, and
20kΩ ranges; 5kΩ on 2Ω range
Rz: 2mA range: 15kΩ
10mA range: 3000Ω
50mA range: 400Ω
Noise Inuence on Accuracy:
0.5%ofrange(max)to20Vpeak-to-peak(20xpeak)
Operating Frequency: 128Hz square wave
Dielectric Test:2000Vrms,50/60Hz betweenfour interconnectedmea-
suring terminals and any external metal ground between line input and
measuring terminals on front panel.
Power Supply:Onebuilt-inrechargeable12Vbattery,orexternal12VDC
Battery Life:
4hrson50mAtestcurrent(80015-secondmeasurements)
7hrson2mAand10mAtestcurrents(150015-secondmeasurements)