Function |
Range |
Resolution |
Measuring range |
Accuracy |
Earth resistance Re (Rg at ρ measurement) |
2Ω |
0.001Ω |
0.03"2.099Ω |
|±2%rdg±0.03Ω |
20Ω |
0.01Ω |
0.03"20.99Ω |
|±2%rdg±5dgt (*1) |
200Ω |
0.1Ω |
0.3"209.9Ω |
2000Ω |
1Ω |
3"2099Ω |
20kΩ |
10Ω |
0.03"20.99kΩ |
200kΩ |
100Ω |
3"209.9kΩ |
Auxiliary earth resistance Rh, Rs |
|
|
|
8% of Re+Rh+Rs |
Earth resistivity ρ |
2Ω |
0.1Ω•m"1Ω•m |
0.2"395.6Ω•m |
ρ=2×π×a×Rg (*2) |
20Ω |
Autoranging |
0.2"3956Ω•m |
200Ω |
|
20"39.56kΩ•m |
2000Ω |
|
0.2"395.6kΩ•m |
20kΩ |
|
2.0"1999kΩ•m |
200kΩ |
|
Series interference voltage |
50V |
0.1V |
0"50.9Vrms |
|±2%rdg±2dgt (50/60Hz) |
Ust (A.C only) (*3) |
|±3%rdg±2dgt (40"500Hz) |
Frequency |
Autoranging |
0.1Hz |
40Hz"500Hz |
|±1%rdg±2dgt |
Fst |
1Hz |
Measuring method |
Earth resistance: Fall-of-potential method (currents and voltages measured via the Probes) |
Measurement method of Earth Resistivity (ρ): Wenner 4-pole method |
Series interference voltage (earth voltage): RMS Rectifier (between the E-S Terminals) |
Memory capacity |
800 data |
Communication Interface |
Model 8212-USB Optical Adaptor |
LCD |
Dot-matrix 192×64 monochrome |
Over-range Indication |
"OL" |
Overload Protection |
between E-S(P) and between E-H(C) terminals AC280V / 10 sec. |
Withstand voltage |
between the electrical circuit and enclosure AC3540V(50/60Hz) / 5 sec. |
Applicable standards |
IEC 61010-1 CAT.III 300V, CAT.IV 150V Pollution degree 2 |
IEC 61010-031, IEC 61557-1, 5, IEC 61326-1 (EMC), IEC 60529 (IP54) |
Power source |
DC12V : sizeAA manganese dry battery (R6P) × 8 |
(Auto power off: approx. 5 minutes) |
Dimensions |
167(L) × 185(W) × 89(D) mm |
Weight |
approx. 900g (including batteries) |
Accessories |
7229A (Earth precision measurement), |
7238A (Simplified measurement test leads), |
8032 (Auxiliary earth spikes [2 spiks/set])×2 sets (4 spikes in total), |
8200-04 (Cord reel [4 pcs])×1 set, |
8212-USB (USB adaptor with "KEW Report(Software)"), |
9121 (Shoulder strap), |
9125 (Carrying case), |
R6P×8, Instruction manual, Calibration certificate |
Optional |
8212-RS232C (RS232C adaptor with "KEW Report(Software)") |