TD1250 Verification Device for Earth Continuity Testers
The TD1250 is a high-precision instrument designed to accurately simulate AC and DC standard resistances. It is ideal for calibrating grounding resistance testers and other AC/DC low-resistance measurement instruments. Additionally, TD1250 functions as a reliable AC/DC ammeter, supporting accuracy verification tasks such as maximum allowable error testing, alarm error verification, and current setting accuracy validation as required by industry calibration standards.
Key Features
- Simulates both AC and DC standard resistances with high accuracy.
- Suitable for calibration of earth resistance testers and low-resistance instruments.
- Works as a precise AC/DC ammeter with scalable measurement accuracy.
- Meets measurement requirements for error testing and calibration compliance.
- Supports full automation and computer communication via RS-232 interface.
- Stable performance with temperature and humidity tolerance suitable for laboratory and field environments.
DCI Measurement Specifications
| Range | Resolution | Class 0.1 (%RD + mA) |
Class 0.05 (%RD + mA) |
Class 0.02 (%RD + mA) |
|---|---|---|---|---|
| 1 A | 10 μA | 0.05 + 1.5 | 0.02 + 1.0 | 0.01 + 0.5 |
| 2 A | 10 μA | 0.05 + 1.5 | 0.02 + 1.0 | 0.01 + 0.5 |
| 5 A | 10 μA | 0.05 + 1.5 | 0.02 + 1.0 | 0.01 + 0.5 |
| 10 A | 100 μA | 0.05 + 1.5 | 0.02 + 1.0 | 0.01 + 0.5 |
| 20 A | 100 μA | 0.05 + 2.5 | 0.02 + 2.0 | 0.01 + 1.0 |
| 50 A | 100 μA | 0.05 + 5.0 | 0.02 + 3.0 | 0.01 + 2.0 |
General Specifications
- Power Supply: AC (220 ± 22)V, (50 ± 2) Hz
- Warm-Up Time: ≥ 30 minutes
- Maximum Power Consumption: 100 VA
- Temperature Range: Working: 5°C ~ 45°C | Storage: -20°C ~ 70°C
- Humidity: Working: 40%–80% RH (no condensation) | Storage: < 80% RH
- Interface: RS-232 Communication
- Weight: Approx. 7.9 kg
- Dimensions: 215 mm (W) × 400 mm (D) × 150 mm (H) (excluding handles and feet)