1. Summary
TD1250 is a precision AC/DC artificial resistance, intergraded a AC/DC ammeter. Applied for calibrating earth continuity tester and other AC/DC low resistance instruments. It can calibrate max permissible error, alarm setting error, test current setting error etc.
2. Features
• DC resistance simulation:200 μΩ (100 μΩ optional)～20 Ω.
• AC resistance simulation：500 μΩ (300 μΩ optional)～15 Ω.
• AC/DC current measurement：0.5 A～36 A(60A option）.
• Accuracy class：0.02/ 0.05/ 0.1.
• Harmonic and ripple function.
• Current waveform display function.
• With data statistics and analysis, stability test function.
• LCD touch screen.
• Setting output values by keys.
3. Applications
4. Characteristics
☆ Resistance Output |
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• Using four-terminals connections, can effective eliminate the measurement error introduced by the lead resistance. |
☆ Multiple Output Mode |
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• “Direct output”mode，User can set output value by physical key or touch screen. |
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• “Rotary Knob”mode，User can setting in clockwise direction or anticlockwise direction. |
☆ Multiple Output Mode |
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• Touch “Calibration point”of screen for “% setting”. |
☆ AC+DC Measurement |
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• Support DC/AC）measurement mode. AC frequency range：45 Hz ~ 65 Hz. • Distortion and ripple test，max bandwidth of DC ripple reaches 1 kHz. Supports 2nd~32nd harmonics. |
☆ DC Characteristic Analysis | |
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Serial Number | Explanation |
| Current overshoot : The maximum value of the test current is displayed in DC mode, which is used to calculate the operating current overshoot; |
| Waveform display：With oscilloscope function ,can real time display of measured current waveform. |
| Ripple measurement：the instrument directly displays the ripple measurement results on the screen for users to read. |
☆ AC Characteristic Analysis | |
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Serial Number | Explanation |
| Harmonic distortion：Display THD/T（harmonic vs. full wave）、THD/F(harmonic vs. fundamental）. Easy for users to real intuitively. |
| Harmonic data：Display the amplitude (RMS), content(%), phase of the 2nd~32nd harmonic, facilitate user analysis. |
| DC component：Display the DC component in the AC current signal. Easy for users to real intuitively. |
| Waveform display：with waveform display function, real time display of measured current waveform. |
☆ Statistical Analysis | |
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Serial Number | Function Description |
| Scoring cycle：0.5 s ~ 20 s integration period can be set(1s by default）; it is convenient for users to set sampling data according to actual needs. |
| Statistical analysis：Real time record and statistics of current test data, including Max, Min, Avg, Span, Stab, S.dev, Time, test times N,etc; Easy for users to real intuitively. |
5. Specifications
5.1 DC Current Measurement
Range | Resolution | Measurement uncertainty (k=2) (%*RD + mA) [1 | |||
Class 0.1 | Class 0.05 | Class 0.02 | |||
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 | |
30 A | 100 μA | 0.05 + 5.0 | 0.02 + 3.0 | 0.01 + 2.0 | |
50 A [2] | 100 μA | 0.05 + 5.0 | 0.02 + 3.0 | 0.01 + 2.0 | |
Note [1] : (ppm = parts per million) (e.g.，10ppm = 0.001%). Note [2]: 50 A Range is optional Accessories | |||||
• Measuring range(TD1250-30A specification, max range:30 A）:0.5 A～36 A.
• Measuring range(TD1250-50A specification, max range: 50 A）:0.5 A～60 A.
• Ripple frequency bandwidth: 1 Hz ~ 1 kHz, accuracy: ±0.02%*RG，effective value.
5.2 AC Current Measurement
Range | Resolution | Measurement uncertainty (k=2) (%*RD + mA) [1] | |||
Class 0.1 | Class 0.05 | Class 0.02 | |||
1 A | 10 μA | 0.10 + 3.0 | 0.05 + 2.0 | 0.02 + 1.0 | |
2 A | 10 μA | 0.10 + 3.0 | 0.05 + 2.0 | 0.02 + 1.0 | |
5 A | 10 μA | 0.10 + 3.0 | 0.05 + 2.0 | 0.02 + 1.0 | |
10 A | 100 μA | 0.10 + 3.0 | 0.05 + 2.0 | 0.02 + 1.0 | |
20 A | 100 μA | 0.10 + 5.0 | 0.05 + 3.0 | 0.02 + 2.0 | |
30 A | 100 μA | 0.10 + 10 | 0.05 + 5.0 | 0.02 + 5.0 | |
50 A[2] | 100 μA | 0.10 + 10 | 0.05 + 5.0 | 0.02 + 5.0 | |
• Measuring range（TD1250-30A specification, max range:30 A）：0.5 A～36 A.
• Measuring range（TD1250-50A specification, max range: 50 A）：0.5 A～60 A.
• AC frequency: 45 Hz ~ 65 Hz, accuracy: ±0.01 Hz, harmonic measurement: 2nd~32nd.
5.3 DC Simulated Resistance
Current Range | Setting Range of Resistance Value R | Adjustment Fineness | Measurement Uncertainty( k=2，A%*RD+R0 ) [1] | ||
Class 0.1 | Class 0.05 | Class 0.02 | |||
50 A [2] | 100 μΩ ≤ R ≤ 4 mΩ | 20 nΩ | 0.1 + 3 μΩ | 0.08 + 1.5 μΩ | 0.04 + 0.8 μΩ |
4 mΩ < R ≤ 40 mΩ | 200 nΩ | 0.1 + 3 μΩ | 0.06 + 1.5 μΩ | 0.03 + 0.8 μΩ | |
40 mΩ < R ≤ 400 mΩ | 2 μΩ | 0.1 | 0.05 | 0.02 | |
30A | 200 μΩ ≤ R ≤ 6 mΩ | 30 nΩ | 0.1 + 5 μΩ | 0.08 + 3 μΩ | 0.04 + 1.5 μΩ |
6 mΩ < R ≤ 60 mΩ | 300 nΩ | 0.1 + 5 μΩ | 0.06 + 3 μΩ | 0.03 + 1.5 μΩ | |
60 mΩ < R ≤ 600 mΩ | 3 μΩ | 0.1 | 0.05 | 0.02 | |
20A | 400 μΩ ≤ R ≤ 10 mΩ | 100 nΩ | 0.1 + 6 μΩ | 0.08 + 5 μΩ | 0.04 + 2.5 μΩ |
10 mΩ < R ≤ 100 mΩ | 1 μΩ | 0.1 + 6 μΩ | 0.06 + 5 μΩ | 0.03 + 2.5 μΩ | |
100 mΩ ≤ R ≤ 1 Ω | 10 μΩ | 0.1 | 0.05 | 0.02 | |
10A | 800 μΩ ≤ R ≤ 20 mΩ | 100 nΩ | 0.1 + 15 μΩ | 0.08 + 6 μΩ | 0.04 + 3 μΩ |
20 mΩ < R ≤ 200 mΩ | 1 μΩ | 0.1 + 15 μΩ | 0.06 + 6 μΩ | 0.03 + 3 μΩ | |
200 mΩ < R ≤ 2 Ω | 10 μΩ | 0.1 | 0.05 | 0.02 | |
5A | 1.6 mΩ ≤ R ≤ 40 mΩ | 200 nΩ | 0.15 + 30 μΩ | 0.09 + 15 μΩ | 0.045 + 6 μΩ |
40 mΩ < R ≤ 400 mΩ | 2 μΩ | 0.12 + 30 μΩ | 0.07 + 15 μΩ | 0.035 + 6 μΩ | |
400 mΩ < R ≤ 4 Ω | 20 μΩ | 0.1 | 0.05 | 0.025 | |
2A | 4 mΩ ≤ R ≤ 100 mΩ | 1 μΩ | 0.20 + 50 μΩ | 0.10 + 30 μΩ | 0.055 + 15 μΩ |
100 mΩ < R ≤ 1 Ω | 10 μΩ | 0.20 + 50 μΩ | 0.10 + 30 μΩ | 0.045 + 15 μΩ | |
1 Ω < R ≤ 10 Ω | 100 μΩ | 0.1 | 0.05 | 0.035 | |
1A | 8 mΩ ≤ R ≤ 200 mΩ | 1 μΩ | 0.30 + 90 μΩ | 0.15 + 50 μΩ | 0.08 + 30 μΩ |
200 mΩ < R ≤ 2 Ω | 10 μΩ | 0.30 + 90 μΩ | 0.15 + 50 μΩ | 0.07 + 30 μΩ | |
2 Ω < R ≤ 20 Ω | 100 μΩ | 0.2 | 0.1 | 0.06 | |
Note [2]: 50 A Range is optional Accessories | |||||
• Simulated resistance range（TD1250-30A specification, maximum range: 30 A）：200 μΩ～20 Ω
Simulated resistance range（TD1250-50A specification, maximum range: 50 A）：100 μΩ～20 Ω
• Display Digits:6-digit decimal display, set the resistance value through the number keys.
5.4 AC Simulated Resistance
Current Range | Setting Range of Resistance Value R | Adjustment Fineness | Measurement Uncertainty ( k=2，A%*RD+R0 ) [1] | ||
Class 0.1 | Class 0.05 | Class 0.02 | |||
50 A [2] | 300 μΩ ≤ R ≤ 3 mΩ | 20 nΩ | 0.3 + 5 μΩ | 0.15 + 3 μΩ | 0.08 + 1.5 μΩ |
3 mΩ < R ≤ 30 mΩ | 200 nΩ | 0.24 + 5 μΩ | 0.12 + 3 μΩ | 0.06 + 1.5 μΩ | |
30 mΩ < R ≤ 300 mΩ | 2 μΩ | 0.2 | 0.1 | 0.04 | |
30A | 500 μΩ ≤ R ≤ 5 mΩ | 30 nΩ | 0.3 + 8 μΩ | 0.15 + 5 μΩ | 0.08 + 2.5 μΩ |
5 mΩ < R ≤ 50 mΩ | 300 nΩ | 0.24 + 8 μΩ | 0.12 + 5 μΩ | 0.06 + 2.5 μΩ | |
50 mΩ < R ≤ 500 mΩ | 3 μΩ | 0.2 | 0.1 | 0.04 | |
20A | 750 μΩ ≤ R ≤ 7.5 mΩ | 50 nΩ | 0.3 + 10 μΩ | 0.15 + 6 μΩ | 0.08 + 4 μΩ |
7.5 mΩ < R ≤ 75 mΩ | 500 nΩ | 0.24 + 10 μΩ | 0.12 + 6 μΩ | 0.06 + 4 μΩ | |
75 mΩ ≤ R ≤ 750 mΩ | 5 μΩ | 0.2 | 0.10 | 0.04 | |
10A | 1.5 mΩ < R ≤ 15 mΩ | 100 nΩ | 0.3 + 20 μΩ | 0.15 + 12 μΩ | 0.08 + 8 μΩ |
15 mΩ < R ≤ 150 mΩ | 1 μΩ | 0.24 + 20 μΩ | 0.12 + 12 μΩ | 0.06 + 8 μΩ | |
150 mΩ < R ≤ 1.5 Ω | 10 μΩ | 0.2 | 0.1 | 0.04 | |
5A | 3 mΩ ≤ R ≤ 30 mΩ | 200 nΩ | 0.3 + 20 μΩ | 0.2 + 15 μΩ | 0.1 + 12 μΩ |
30 mΩ < R ≤ 300 mΩ | 2 μΩ | 0.3 + 20 μΩ | 0.15 + 15 μΩ | 0.07 + 12 μΩ | |
300 mΩ < R ≤ 3 Ω | 20 μΩ | 0.2 | 0.1 | 0.05 | |
2A | 7.5 mΩ ≤ R ≤ 75 mΩ | 5 μΩ | 0.4 + 80 μΩ | 0.2 + 50 μΩ | 0.11 + 30 μΩ |
75 mΩ < R ≤ 750 mΩ | 50 μΩ | 0.4 + 80 μΩ | 0.2 + 50 μΩ | 0.09 + 30 μΩ | |
750 mΩ < R ≤ 7.5 Ω | 500 μΩ | 0.2 | 0.14 | 0.07 | |
1A | 15 mΩ ≤ R ≤ 150 mΩ | 1 μΩ | 0.6 + 150 μΩ | 0.3 + 90 μΩ | 0.16 + 60 μΩ |
150 mΩ < R ≤ 1.5 Ω | 10 μΩ | 0.6 + 150 μΩ | 0.3 + 90 μΩ | 0.14 + 60 μΩ | |
1.5 Ω < R ≤ 15 Ω | 100 μΩ | 0.4 | 0.2 | 0.12 | |
Note [2]: 50 A Range is optional Accessories | |||||
• Simulated resistance range（TD1250-30A specification, maximum range: 30 A）：500 μΩ～15 Ω.
Simulated resistance range（TD1250-50A specification, maximum range: 50 A）：300 μΩ～15 Ω.
• Display Digits:6-digit decimal display, set the resistance value through the number keys.
• AC frequency: 45 Hz ~ 65 Hz, accuracy: ±0.01 Hz.
6. General Specifications
Power Supply | AC ( 220 ± 22 ) V，( 50 ± 2 ) Hz |
Temperature Performance | Working temperature：0℃~45℃; Storage temperature：-20℃~70℃ |
Humidity Performance | Working humidity：< 80% @ 30℃，< 70% @ 40℃，< 40% @ 50℃ Storage humidity：(20%~80%) R·H，non-condensing |
Interface | RS232 |
7. Ordering Information
Advanced Multifunction Calibrator Advanced Electrical Reference Standards Electric Vehicle （EV）Charging Facility Tester AC/DC Standard Source /Meter Single-phase/Three-phase Standard Meter Magnetic Parameters Measurement and Calibration Magnetic Material Testing Equipment Electrical Steel Testing Equipment