| General Specifications |
| Display: 1999 digit LCD |
Display with special symbols, digit height 25 mm, fluorescent backlight |
| User interface |
Instant measurement through TURN and START one button concept. The only operating elements are rotary switch and START button |
| Robust, water and dust resistant |
Instrument is designed for tough environmental conditions (rubber protective cover, IP56) |
| Memory |
Internal memory storage up to 1500 records accessible via USB port |
| Temperature Range |
| Operating temperature |
-10°C to 50°C (14°F to 122°F) |
| Storage temperature |
-30°C to 60°C (-22°F to 140°F) |
| Temperature coefficient |
±0.1% of reading/°C < 18°C > 28°C |
| Intrinsic error |
Refers to the reference temperature range and is guaranteed for 1 year |
| Operating error |
Refers to the operating temperature range and is guaranteed for 1 year |
| Climatic class |
C1 (IEC 654-1), -5°C to +45°C (23° to +115° F), 5% to 95% RH |
| Protective type |
IP56 for case, IP40 for battery door according to EN60529 |
| Safety |
Protection by double and/or reinforced insulation. max. 50 V to earth. IEC61010-1: Pollution degree 2 |
| EMC (emission immunity) |
IEC61326-1: Portable |
| Quality system |
Developed, designed and manufactured according to DIN ISO 9001 |
| External voltage |
V ext, max = 24 V (DC, AC < 400 Hz), measurement inhibited for higher values |
| V ext rejection |
> 120 dB (162⁄3, 50, 60, 400 Hz) |
| Measuring time |
Typical 6 seconds |
| Max. overload |
250 V rms (pertains to misuse) |
| Auxiliary power |
6 x 1.5 V Alkaline (type AA LR6) |
| Battery life span |
Typical > 3,000 measurements |
| Dimensions (W x H x D) |
250 x 133 x 187 mm (9.75 x 5.25 x 7.35 in) |
| Weight |
1.1 kg (2.43 lb) including batteries
7.6 kg (16.8 lb) incl. accessories and batteries in carrying case |
| RA 3-Pole Ground Resistance Measurement (IEC 1557-5) |
| Switch position |
RA 3-pole |
| Resolution |
0.001 Ω to 10 Ω |
| Measuring range |
0.020 Ω to 19.99 kΩ |
| Accuracy |
±(2% rdg + 3 d) |
| Operating error |
±(5% rdg + 3 d) |
| Measuring Principle: Current/Voltage Measurement |
| Measuring voltage |
Vm = 48 V AC |
| Short-circuit current |
> 50 mA |
| Measure frequency |
128 Hz |
| Probe resistance (RS) |
Max 100 kΩ |
| Auxiliary earth electrode resistance (RH) |
Max 100 kΩ |
| Additional error from RH and RS |
RH[kΩ]•••RS[kΩ]/RA[Ω]•••0.2% |
Monitoring of RS and RH with error indicator.
Automatic range selection.
Measurement is not performed if the current through the current clamp is too low. |
| RA 4-Pole Ground Resistance Measurement (IEC 1557-5) |
| Switch position |
RA 4-pole |
| Resolution |
0.001 Ω to 10 Ω |
| Measuring range |
0.020 Ω to 19.99 kΩ |
| Accuracy |
±(2% rdg + 3 d) |
| Operating error |
±(5% rdg + 3 d) |
| Measuring Principle: Current/Voltage Measurement |
| Measuring voltage |
Vm = 48 V AC |
| Short-circuit current |
> 50 mA |
| Measure frequency |
128 Hz |
| Probe resistance (RS + RES) |
Max 100 kΩ |
| Auxiliary earth electrode resistance (RH) |
Max 100 kΩ |
| Additional error from RH and RS |
RH[kΩ]•••RS[kΩ]/RA[Ω]•••0.2% |
Monitoring of RS and RH with error indicator.
Automatic range selection. |
| RA 3-Pole Selective Ground Resistance Measurement with Current Clamp (RA with Clamp ) |
| Switch position |
RA 3-pole with clamp |
| Resolution |
0.001 Ω to 10 Ω |
| Measuring range |
0.020 Ω to 19.99 kΩ |
| Accuracy |
±(7% rdg + 3 d) |
| Operating error |
±(10% rdg + 5 d) |
| Measuring Principle: Current/Voltage Measurement (with External Current Clamp) |
| Measuring voltage |
Vm = 48 V AC |
| Short-circuit current |
> 50 mA |
| Measure frequency |
128 Hz |
| Probe resistance (RS) |
Max 100 kΩ |
| Auxiliary earth electrode resistance (RH) |
Max 100 kΩ |
Monitoring of RS and RH with error indicator.
Automatic range selection.
Measurement is not performed if the current through the current clamp is too low. |
| RA 4-Pole Selective Ground Resistance Measurement with Current Clamp (RA with Clamp ) |
| Switch position |
RA 4-pole with clamp |
| Resolution |
0.001 Ω to 10 Ω |
| Measuring range |
0.020 Ω to 19.99 kΩ |
| Accuracy |
±(7% rdg + 3 d) |
| Operating error |
±(10% rdg + 5 d) |
| Measuring Principle: Current/Voltage Measurement (with External Current Clamp) |
| Measuring voltage |
Vm = 48 V AC |
| Short-circuit current |
> 50 mA |
| Measure frequency |
128 Hz |
| Probe resistance (RS) |
Max 100 kΩ |
| Auxiliary earth electrode resistance (RH) |
Max 100 kΩ |
Monitoring of RS and RH with error indicator.
Automatic range selection.
Measurement is not performed if the current through the current clamp is too low. |
| Stakeless Ground Loop Measurement (2 Clamps) |
| Switch position |
RA 4-pole 2 clamps |
| Resolution |
0.001 Ω to 10 Ω |
| Measuring range |
0.020 Ω to 19.99 kΩ |
| Accuracy |
±(7% rdg + 3 d) |
| Operating error |
±(10% rdg + 5 d) |
| Measuring Principle: Stakeless Measurement of Resistance in Closed Loops Using Two Current Transformers |
| Measuring voltage |
Vm = 48 V AC |
| Measure frequency |
128 Hz |
| Noise current (IEXT) |
Max. IEXT = 10 A (AC) (RA < 20 Ω) |
| Max. IEXT = 2 A (AC) (RA > 20 Ω) |
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