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TD1250 Verification Device for Earth Continuity Testers

Name: TD1250 Verification Device for Earth Continuity Testers
Brand: TUNKIA
SKU: 531343967
Rating: 5.0 (22 reviews)

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.

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.
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Model:
TD1250
Brand:
TUNKIA

TD1250 Verification Device for Earth Continuity Testers

TUNKIA TD1250 Verification Device for Earth Continuity Testers

1. Summary

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

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”mode，User can set output value by physical key or touch screen.

TUNKIA TD1250 Verification Device for Earth Continuity Testers

• “Rotary Knob”mode，User 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/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

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

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

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**
Range	Resolution	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]**
Range	Resolution	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]**
Current Range	Setting Range of Resistance Value R	Adjustment Fineness	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]**
Current Range	Setting Range of Resistance Value R	Adjustment Fineness	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