Function | Range | Resolution | Measuring range | Accuracy |
---|---|---|---|---|
Earth resistance Re (Rg at ¥ñ measurement) | 2¥Ø | 0.001¥Ø | 0.03 - 2.099¥Ø | ¡¾2%rdg¡¾0.03¥Ø |
20¥Ø | 0.01¥Ø | 0.03 - 20.99¥Ø | ¡¾2%rdg¡¾5dgt (*1) | |
200¥Ø | 0.1¥Ø | 0.3 - 209.9¥Ø | ||
2000¥Ø | 1¥Ø | 3 - 2099¥Ø | ||
20k¥Ø | 10¥Ø | 0.03k - 20.99k¥Ø | ||
200k¥Ø | 100¥Ø | 0.3k - 209.9k¥Ø | ||
Auxiliary earth resistance Rh, Rs | 8% of Re+Rh+Rs | |||
Earth resistivity ¥ñ | 2¥Ø | 0.1¥Ø¡¤mm - 1¥Ø¡¤m Autoranging | 0.2 - 395.6¥Ø¡¤m | ¥ñ=2¡¿¥ð¡¿a¡¿Rg (*2) |
20¥Ø | 0.2 - 3956¥Ø¡¤m | |||
200¥Ø | 20 - 39.56k¥Ø¡¤m | |||
2000¥Ø | 0.2 - 395.6k¥Ø¡¤m | |||
20k¥Ø | 2.0 - 1999k¥Ø¡¤m | |||
200k¥Ø | ||||
Series interference voltage Ust (A.C only) (*3) | 50V | 0.1V | 0 - 50.9Vrms | ¡¾2%rdg¡¾2dgt (50/60Hz) |
¡¾3%rdg¡¾2dgt (40 - 500Hz) | ||||
Frequency Fst | Autoranging | 0.1Hz 1Hz | 40Hz - 500Hz | ¡¾1%rdg¡¾2dgt |
Measuring method | Earth resistance: Fall-of-potential method (currents and voltages measured via the Probes) Measurement method of Earth Resistivity (¥ñ): 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. | |||
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 (R6) ¡¿ 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), R6 ¡¿ 8, Instruction manual, Calibration certificate | |||
Optional | 8212-RS232C (RS232C adaptor with "KEW Report(Software)") |
(*1) Auxiliary earth resistance is 100¥Ø with Rk correction
(*2) Depending on the measured Rg. Interval [a] between auxiliary earth spikes is 1.0 - 30.0m
(*3) This instrument is NOT designed to measure line voltages on commercial powers.