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Detailed Specifications |
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General |
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Display:1999 digit LCD |
Display with special symbols, digit height 25 mm, fluorescent backlight |
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User interface |
Instant measurement through TURN and START one button concept. The only operating elements are rotary switch and START button |
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Robust, water and dust resistant |
Instrument is designed for tough environmental conditions (rubber protective cover, IP56) |
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Memory |
Internal memory storage up to 1500 records accessible via USB port |
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Temperature Range |
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Operating temperature |
-10 °C to 50 °C (14 °F to 122 °F) |
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Storage temperature |
-30 °C to 60 °C (-22 °F to 140 °F) |
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Temperature coefficient |
± 0.1 % of reading/°C <18 °C >28 °C |
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Intrinsic error |
Refers to the reference temperature range and is guaranteed for 1 year |
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Operating error |
Refers to the operating temperature range and is guaranteed for 1 year |
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Climatic class |
C1 (IEC 654-1), -5 °C to +45 °C (23° to +115° F), 5 % to 95 % RH |
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Protective type |
IP56 for case, IP40 for battery door according to EN60529 |
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Safety |
Protection by double and/or reinforced insulation. max. 50 V to earth. IEC61010-1: Pollution degree 2 |
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EMC (emission immunity) |
IEC61326-1: Portable |
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Quality system |
Developed, designed and manufactured according to DIN ISO 9001 |
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External voltage |
V ext, max = 24 V (dc, ac < 400 Hz), measurement inhibited for higher values |
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V ext rejection |
> 120 dB (162⁄3, 50, 60, 400 Hz) |
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Measuring time |
Typical 6 seconds |
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Max. overload |
250 V rms (pertains to misuse) |
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Auxiliary power |
6 x 1.5 V Alkaline (type AA LR6) |
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Battery life span |
Typical > 3,000 measurements |
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Dimensions (WxHxD) |
250 mm x 133 mm x 187 mm (9.75 in x 5.25 in x 7.35 in) |
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Weight |
1.1 kg (2.43 lb) including batteries
7.6 kg (16.8 lb) incl. accessories and batteries in carrying case |
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RA 3-Pole Ground Resistance Measurement (IEC 1557-5) |
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Switch position |
RA 3-pole |
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Resolution |
0.001 Ω to 10 Ω |
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Measuring range |
0.020 Ω to 19.99 kΩ |
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Accuracy |
± (2 % rdg + 3 d) |
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Operating error |
± (5 % rdg + 3 d) |
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Measuring Principle: Current and Voltage Measurement |
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Measuring voltage |
Vm = 48 V ac |
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Short-circuit current |
> 50 mA |
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Measure frequency |
128 Hz |
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Probe resistance (RS) |
Max 100 kΩ |
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Auxiliary earth electrode resistance (RH) |
Max 100 kΩ |
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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. |
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RA 4-Pole Ground Resistance Measurement (IEC 1557-5) |
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Switch position |
RA 4-pole |
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Resolution |
0.001 Ω to 10 Ω |
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Measuring range |
0.020 Ω to 19.99 kΩ |
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Accuracy |
± (2 % rdg + 3 d) |
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Operating error |
± (5 % rdg + 3 d) |
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Measuring Principle: Current and voltage Measurement |
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Measuring voltage |
Vm = 48 V ac |
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Short-circuit current |
> 50 mA |
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Measure frequency |
128 Hz |
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Probe resistance (RS +RES) |
Max 100 kΩ |
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Auxiliary earth electrode resistance (RH) |
Max 100 kΩ |
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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. |
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RA 3-Pole Selective Ground Resistance Measurement with Current Clamp (RA with Clamp ) |
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Switch position |
RA 3-pole with clamp |
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Resolution |
0.001 Ω to 10 Ω |
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Measuring range |
0.020 Ω to 19.99 kΩ |
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Accuracy |
± (7 % rdg + 3 d) |
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Operating error |
± (10 % rdg + 5 d) |
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Measuring Principle: Current/Voltage Measurement (with External Current Clamp)
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Measuring voltage |
Vm = 48 V ac |
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Short-circuit current |
> 50 mA |
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Measure frequency |
128 Hz |
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Probe resistance (RS) |
Max 100 kΩ |
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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. |
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RA 4-Pole Selective Ground Resistance Measurement with Current Clamp (RA with Clamp ) |
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Switch position |
RA 4-pole with clamp |
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Resolution |
0.001 Ω to 10 Ω |
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Measuring range |
0.020 Ω to 19.99 kΩ |
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Accuracy |
± (7 % rdg + 3 d) |
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Operating error |
± (10 % rdg + 5 d) |
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Measuring Principle: Current/Voltage Measurement (with External Current Clamp) |
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Measuring voltage |
Vm = 48 V ac |
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Short-circuit current |
> 50 mA |
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Measure frequency |
128 Hz |
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Probe resistance (RS) |
Max 100 kΩ |
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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. |
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Stakeless Ground Loop Measurement (2 Clamps ) |
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Switch position |
RA 4-pole 2 clamps |
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Resolution |
0.001 Ω to 10 Ω |
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Measuring range |
0.020 Ω to 19.99 kΩ |
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Accuracy |
± (7 % rdg + 3 d) |
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Operating error |
± (10 % rdg + 5 d) |
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Measuring Principle: Stakeless Measurement of Resistance in Closed Loops Using Two Current Transformers |
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Measuring voltage |
Vm = 48 V ac |
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Measure frequency |
128 Hz |
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Noise current (IEXT) |
Max. IEXT = 10 A (ac) (RA < 20 Ω) |
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Max. IEXT = 2 A (ac) (RA > 20 Ω) |
Automatic range selection.
The information regarding stakeless ground loop measurements is only valid when used in conjunction with the recommended current clamps at the minimum distance specified. |
