Earth Testing Kit · Test & Measurement
ERT-40R
Multi-method earth resistance tester with 2/3/4-wire measurements, soil resistivity (Wenner), and earth voltage up to 600 V. IP65 field kit with AFC for stable readings and a large backlit display.
2 / 3 / 4-wire
Soil resistivity
Earth voltage 0–600 V
AFC 128/111/105/94 Hz
IP65 kit
Large backlit LCD
USB / Bluetooth® software
Key features
Comprehensive methods
2/3/4‑wire earth resistance for commissioning and verification.
Soil resistivity
4‑pole Wenner method for planning and earthing studies.
Earth voltage
Measure 0–600 V to check site conditions before testing.
Large backlit LCD
Clear outdoors; indicators for interference, overflow and wiring.
AFC interference rejection
Auto frequency control (128/111/105/94 Hz) stabilises readings.
Rugged IP65 kit
Water/dust‑protected case and long test leads included.
Ranges & key specifications
| Function | Range | Resolution | Accuracy | Notes |
|---|---|---|---|---|
| Earth resistance | 0.00 Ω – 30.00 kΩ | 0.01 Ω | — | 2/3/4‑wire; AFC selects 128/111/105/94 Hz |
| Soil resistivity | 0.00 Ω·m – 9000 kΩ·m | — | — | Wenner 4‑pole |
| Earth voltage | 0 – 600 V | 0.1 V | — | Average rectification |
| Power | Rechargeable pack (per datasheet) | |||
See datasheet for detailed ranges, accuracy and operating conditions.
Where the ERT-40R excels
Utilities & substations
Construction & lightning
Telecoms / oil & gas
Facilities maintenance
Accessories
Included accessories
- Auxiliary grounding rods — 4 pcs
- Standard testing wires — Red 20 m, Black 20 m, Yellow 10 m, Green 10 m
- Simple testing wires — Red 1.6 m, Black 1.6 m
- USB/Bluetooth® PC software & cable
- Carry case (IP65 protection)
Safety & Compliance
IEC
Designed, manufactured and tested according to IEC 61010‑1
CAT
Measurement Category CAT III 300 V / CAT IV 150 V
EMC
IEC 61326
61557
IEC 61557‑1 (Earth Resistance), IEC 61557‑5 (Soil Resistivity)
Downloads
Datasheet (PDF)
Software
Coming soon
Preview
Connection diagrams — 2 / 3 / 4‑wire
2‑wire (simplified)
Use when a quick check is sufficient and conditions are suitable.
3‑wire (precise)
Standard method for commissioning and verification.
4‑wire (guarded)
Use guarding where surface leakage affects measurements.
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