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TD1250 Verification Device for Earth Continuity Testers

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.
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  • TD1250

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TD1250 Verification Device for Earth Continuity Testers

TUNKIA TD1250 Verification Device for Earth Continuity Testers

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 simulation500 μΩ (300 μΩ optional)15 Ω.

AC/DC current measurement0.5 A36 A(60A option.

Accuracy class0.02/ 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

TUNKIA TD1250 Verification Device for Earth Continuity Testers


4. Characteristics

Resistance Output

TUNKIA TD1250 Verification Device for Earth Continuity Testers

Using four-terminals connections, can effective eliminate the measurement error introduced by the lead resistance.


Multiple Output Mode

TD1250 Testing Apparatus for Earth Continuity Testers

Direct output”modeUser can set output value by physical key or touch screen.

TUNKIA TD1250 Verification Device for Earth Continuity Testers

Rotary Knob”modeUser can setting in clockwise direction or anticlockwise direction.


Multiple Output Mode

TUNKIA TD1250 Verification Device for Earth Continuity Testers

Touch “Calibration point”of screen for “% setting”.


AC+DC Measurement

TUNKIA TD1250 Verification Device for Earth Continuity Testers

Support DC/ACmeasurement mode. AC frequency range45 Hz ~ 65 Hz.

Distortion and ripple testmax bandwidth of DC ripple reaches 1 kHz. Supports 2nd~32nd harmonics.


DC Characteristic Analysis

TUNKIA TD1250 Verification Device for Earth Continuity Testers

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 displayWith oscilloscope function ,can real time display of measured current waveform.

Ripple measurementthe instrument directly displays the ripple measurement results on the screen for users to read.



AC Characteristic Analysis

TUNKIA TD1250 Verification Device for Earth Continuity Testers

Serial Number

Explanation

Harmonic distortionDisplay THD/Tharmonic vs. full wave)、THD/F(harmonic vs. fundamental. Easy for users to real intuitively.

Harmonic dataDisplay the amplitude (RMS), content(%), phase of the 2nd~32nd harmonic, facilitate user analysis.

DC componentDisplay the DC component in the AC current signal. Easy for users to real intuitively.

Waveform displaywith waveform display function, real time display of measured current waveform.


Statistical Analysis

TUNKIA TD1250 Verification Device for Earth Continuity Testers

Serial Number

Function Description

Scoring cycle0.5 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 analysisReal 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 A36 A.

Measuring range(TD1250-50A specification, max range: 50 A:0.5 A60 A.

Ripple frequency bandwidth: 1 Hz ~ 1 kHz, accuracy: ±0.02%*RGeffective 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 rangeTD1250-30A specification, max range:30 A):0.5 A36 A.

Measuring rangeTD1250-50A specification, max range: 50 A):0.5 A60 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

20

0.1 + 3 μΩ

0.08 + 1.5 μΩ

0.04 + 0.8 μΩ

4 < R ≤ 40

200

0.1 + 3 μΩ

0.06 + 1.5 μΩ

0.03 + 0.8 μΩ

40 < R ≤ 400

2 μΩ

0.1

0.05

0.02

30A

200 μΩ ≤ R ≤ 6

30

0.1 + 5 μΩ

0.08 + 3 μΩ

0.04 + 1.5 μΩ

6 < R ≤ 60

300

0.1 + 5 μΩ

0.06 + 3 μΩ

0.03 + 1.5 μΩ

60 < R ≤ 600

3 μΩ

0.1

0.05

0.02

20A

400 μΩ ≤ R ≤ 10

100

0.1 + 6 μΩ

0.08 + 5 μΩ

0.04 + 2.5 μΩ

10 < R ≤ 100

1 μΩ

0.1 + 6 μΩ

0.06 + 5 μΩ

0.03 + 2.5 μΩ

100 ≤ R ≤ 1 Ω

10 μΩ

0.1

0.05

0.02

10A

800 μΩ ≤ R ≤ 20

100

0.1 + 15 μΩ

0.08 + 6 μΩ

0.04 + 3 μΩ

20 < R ≤ 200

1 μΩ

0.1 + 15 μΩ

0.06 + 6 μΩ

0.03 + 3 μΩ

200 < R ≤ 2 Ω

10 μΩ

0.1

0.05

0.02

5A

1.6 ≤ R ≤ 40

200

0.15 + 30 μΩ

0.09 + 15 μΩ

0.045 + 6 μΩ

40 < R ≤ 400

2 μΩ

0.12 + 30 μΩ

0.07 + 15 μΩ

0.035 + 6 μΩ

400 < R ≤ 4 Ω

20 μΩ

0.1

0.05

0.025

2A

4 ≤ R ≤ 100

1 μΩ

0.20 + 50 μΩ

0.10 + 30 μΩ

0.055 + 15 μΩ

100 < 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 ≤ R ≤ 200

1 μΩ

0.30 + 90 μΩ

0.15 + 50 μΩ

0.08 + 30 μΩ

200 < 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 rangeTD1250-30A specification, maximum range: 30 A):200 μΩ20 Ω

Simulated resistance rangeTD1250-50A specification, maximum range: 50 A):100 μΩ20 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

20

0.3 + 5 μΩ

0.15 + 3 μΩ

0.08 + 1.5 μΩ

3 < R ≤ 30

200

0.24 + 5 μΩ

0.12 + 3 μΩ

0.06 + 1.5 μΩ

30 < R ≤ 300

2 μΩ

0.2

0.1

0.04

30A

500 μΩ ≤ R ≤ 5

30

0.3 + 8 μΩ

0.15 + 5 μΩ

0.08 + 2.5 μΩ

5 < R ≤ 50

300

0.24 + 8 μΩ

0.12 + 5 μΩ

0.06 + 2.5 μΩ

50 < R ≤ 500

3 μΩ

0.2

0.1

0.04

20A

750 μΩ ≤ R ≤ 7.5

50

0.3 + 10 μΩ

0.15 + 6 μΩ

0.08 + 4 μΩ

7.5 < R ≤ 75

500

0.24 + 10 μΩ

0.12 + 6 μΩ

0.06 + 4 μΩ

75 ≤ R ≤ 750

5 μΩ

0.2

0.10

0.04

10A

1.5 < R ≤ 15

100

0.3 + 20 μΩ

0.15 + 12 μΩ

0.08 + 8 μΩ

15 < R ≤ 150

1 μΩ

0.24 + 20 μΩ

0.12 + 12 μΩ

0.06 + 8 μΩ

150 < R ≤ 1.5 Ω

10 μΩ

0.2

0.1

0.04

5A

3 ≤ R ≤ 30

200

0.3 + 20 μΩ

0.2 + 15 μΩ

0.1 + 12 μΩ

30 < R ≤ 300

2 μΩ

0.3 + 20 μΩ

0.15 + 15 μΩ

0.07 + 12 μΩ

300 < R ≤ 3 Ω

20 μΩ

0.2

0.1

0.05

2A

7.5 ≤ R ≤ 75

5 μΩ

0.4 + 80 μΩ

0.2 + 50 μΩ

0.11 + 30 μΩ

75 < R ≤ 750

50 μΩ

0.4 + 80 μΩ

0.2 + 50 μΩ

0.09 + 30 μΩ

750 < R ≤ 7.5 Ω

500 μΩ

0.2

0.14

0.07

1A

15 ≤ R ≤ 150

1 μΩ

0.6 + 150 μΩ

0.3 + 90 μΩ

0.16 + 60 μΩ

150 < 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 rangeTD1250-30A specification, maximum range: 30 A):500 μΩ15 Ω.

Simulated resistance rangeTD1250-50A specification, maximum range: 50 A):300 μΩ15 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 temperature0℃~45℃;

Storage temperature-20℃~70℃

Humidity Performance

Working humidity< 80% @ 30℃< 70% @ 40℃< 40% @ 50℃

Storage humidity(20%~80%) R·Hnon-condensing

Interface

RS232


7. Ordering Information

TUNKIA TD1250 Verification Device for Earth Continuity Testers


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