TH0500 Precision Current Conversion Standard

The TH0500 is a series of precision current conversion standards that utilize high-precision DC current comparator technology. They convert nominal DC/AC currents ranging from 0.1 A to 20 kA into proportionally smaller voltage or current signals while maintaining a high level of ratio accuracy.
  • TH0500

  • TUNKIA

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TH0500 Precision Current Conversion Standard

(Replacing model TH0210/TH0220/TH0230/TH0240)

TUNKIA TH0500 Precision Current Conversion Standard

1. Summary

The TH0500 is a series of precision current conversion standards that utilize high-precision DC current comparator technology. They convert nominal DC/AC currents ranging from 0.1 A to 20 kA into proportionally smaller voltage or current signals while maintaining a high level of ratio accuracy. By connecting the secondary output to appropriate measuring instruments, a wide variety of measurement applications can be achieved.


2. Features

• Primary current input supports both direct input and through-core connection.

Direct input nominal range: 0.1 A … 200 A.

Through-core nominal range: 500 A … 20 kA.

• Secondary output signal can be configured as either current-mode (I/I) or voltage-mode (I/V).

I/I type: Best proportional uncertainty reaches 2 ppm.

I/V type: Best proportional uncertainty reaches 10 ppm.

• Measurement Frequency: DC ~ 5 kHz


3. Application

• Establish DC / AC current precision measurement system

• Calibration of DC / AC current source or ammeter

• Calibration of DC current ratio standard (current comparator)

• Calibration of DC current transformer / sensor

• Calibration of DC I/V conversion standards


☆ Flexible Current Access and Signal Output Mode

TUNKIA TH0500 Precision Current Conversion Standard

The current input supports two connection methods: direct connection and through-core connection.

• Direct Connection: Utilizes standard current terminals, suitable for measuring smaller currents with a nominal input range of 0.1 A to 200 A.

• Through-Core Connection: Features an aperture designed for easy threading of large-gauge conductors, suitable for measuring high currents with a nominal input range of 500 A to 20 kA.

The secondary output signal can be selected as either voltage type or current type.

• Voltage Output (I/V Type): Provides a nominal output of 1 V, facilitating connection to precision voltmeters for current conversion and measurement.

• Current Output (I/I Type): Provides a nominal output range of 0.1 A to 5 A. It is suitable for calibrating DC ratio standards (current comparators), DC I/V conversion standards, DC current transformers, and for extending the current range of DC power meters.


3.1 Application of TH0500 I/V Type

☆ Establish Current Precision Measurement System

TUNKIA TH0500 Precision Current Conversion Standard

• Users can establish a precision current measurement system by combining the TH0530, a precision voltmeter, and a stable current source.

• This setup enables precision measurement of high currents or provides accurate, stable DC/AC current signals for test devices or loads.


☆ Calibrate High Current Source / Meter

TUNKIA TH0500 Precision Current Conversion Standard

• Another typical application of the type I / V transform is paired with a precision voltmeter to calibrate the AC high current standard source / meter.


☆ Calibrate I/V Conversion Standards

TUNKIA TH0500 Precision Current Conversion Standard

• Using the I/V type TH0500, you can calibrate the DC shunt, current transducer and other I/ V transform devices in the following two methods.

• Calibration by difference method: The selected TH0500 is in the same proportion as the tested I/V, and a micro voltmeter such as a nanovoltmeter is used for calibration

• Calibration by voltage ratio method: The selected TH0500 is not proportional to the tested I / V and is calibrated using a voltage ratio measurement device. (Note: For the calibration of type I /I conversion standard such as current comparator and DC current transformer, type I/ I TH0500 is recommended as the standard; the secondary series standard resistance being tested I / I is also used as described in the method above figure.)


3.2 Application of TH0500 I/I Type

☆Calibrate I/I Conversion Standards

TUNKIA TH0500 Precision Current Conversion Standard

• I/I type TH0500 can be used to calibrate DC current comparator, current transformer and other I/I conversion equipment according to the following two methods.

• Calibration by difference method: the selected TH0500 is in the same proportion as the tested I/I μA micro ammeter for calibration.

• Calibration by current ratio method: TH0500 selected is not in the same proportion as the tested I/I, and the current ratio measuring device is used for calibration


☆ Establish High Voltage and High Current Power/ Energy Precision Measurement System

TUNKIA TH0500 Precision Current Conversion Standard

• The TH0530 can be paired with high-voltage V/V conversion equipment (typically such as the TH0170 Precision DC Voltage Divider) and standard power/energy meters (typically such as the TH1300 AC/DC Power and Energy Measurement Standard) to form a high-voltage, high-current power/energy precision measurement system.

• This system is used for measuring the output power of high-power sources, the efficiency of conversion equipment, and for calibrating high-current power sources, power meters, and other devices.



4. Specification

4.1 Direct Connected I/I Conversion Standard

Model

Nominal Input Current

( A )

Nominal Output Current

( A )

Nominal Ratio


Measurement Accuracy

( ± μA / A, referenced to full-scale value)

DC

AC@53Hz

TH0500-I-D-01A-01A-2

0.1

0.1

1:1

2

150

TH0500-I-D-02A-01A-2

0.2

0.1

2:1

2

150

TH0500-I-D-05A-01A-2

0.5

0.1

5:1

2

150

TH0500-I-D-1A-01A-2

1

0.1

10:1

2

150

TH0500-I-D-2A-01A-2

2

0.1

20:1

2

150

TH0500-I-D-5A-01A-2

5

0.1

50:1

2

150

TH0500-I-D-10A-01A-2

10

0.1

100:1

2

150

TH0500-I-D-20A-01A-2

20

0.1

200:1

2

150

TH0500-I-D-50A-01A-2

50

0.1

500:1

2

150

TH0500-I-D-100A-01A-2

100

0.1

1000:1

2

150

TH0500-I-D-200A-01A-2

200

0.1

2000:1

2

150

• Measurement range: ± (0~120%) * FS; Measuring frequency: DC~5 kHz (3dB signal bandwidth ≥ 100 kHz)


4.2 Through Core I/I Conversion Standard

Model

Nominal Input Current

( A )

Nominal Output Current ( A )

Nominal Ratio

Measurement Accuracy

( ± μA / A, referenced to full-scale value)

DC

AC@53Hz

TH0500-I-T-500A-02A-5

500

0.2

2500:1

5

150

TH0500-I-T-1kA-05A-5

1 k

0.5

2000:1

5

150

TH0500-I-T-2kA-1A-5

2 k

1

2000:1

5

150

TH0500-I-T-5kA-2A-5

5 k

2

2500:1

5

150

TH0500-I-T-10kA-2A-10

10 k

2

5000:1

10

150

TH0500-I-T-20kA-5A-20

20 k

5

4000:1

20

150

• Measurement Range: ±(0~110%) of Full Scale (FS)

• Measurement Frequency: DC ~ 5 kHz (Signal bandwidth ≥ 100 kHz at 3dB)

• Note: The nominal secondary output current can be customized according to customer requirements.


4.3 Direct Connected I/V Conversion Standard

Model

Nominal Input Current

( A )

Nominal Output Voltage

( V )

Measurement Accuracy

( ± 1×10-6, referenced to full-scale value)

DC

AC@53Hz

TH0500-U-D-01A-1V-10

0.1

1

10

200

TH0500-U-D-02A-1V-10

0.2

1

10

200

TH0500-U-D-05A-1V-10

0.5

1

10

200

TH0500-U-D-1A -1V-10

1

1

10

200

TH0500-U-D-2A-1V-10

2

1

10

200

TH0500-U-D-5A-1V-10

5

1

10

200

TH0500-U-D-10A-1V-10

10

1

10

200

TH0500-U-D-20-1V-10

20

1

10

200

TH0500-U-D-50A-1V-10

50

1

10

200

TH0500-U-D-100-1V-10

100

1

10

200

TH0500-U-D-200A-1V-10

200

1

10

200

TH0500-U-D-01A-1V-20

0.1

1

20

200

TH0500-U-D-02A-1V-20

0.2

1

20

200

TH0500-U-D-05A-1V-20

0.5

1

20

200

TH0500-U-D-1A-1V-20

1

1

20

200

TH0500-U-D-2A-1V-20

2

1

20

200

TH0500-U-D-5A-1V-20

5

1

20

200

TH0500-U-D-10A-1V-20

10

1

20

200

TH0500-U-D-20A-1V-20

20

1

20

200

TH0500-U-D-50A-1V-20

50

1

20

200

TH0500-U-D-100A-1V-20

100

1

20

200

TH0500-U-D-200A-1V-20

200

1

20

200

TH0500-U-D-01A-1V-50

0.1

1

50

200

TH0500-U-D-02A-1V-50

0.2

1

50

200

TH0500-U-D-05A-1V-50

0.5

1

50

200

TH0500-U-D-1A-1V-50

1

1

50

200

TH0500-U-D-2A-1V-50

2

1

50

200

TH0500-U-D-5A-1V-50

5

1

50

200

TH0500-U-D-10A-1V-50

10

1

50

200

TH0500-U-D-20A-1V-50

20

1

50

200

TH0500-U-D-50A-1V-50

50

1

50

200

TH0500-U-D-100A-1V-50

100

1

50

200

TH0500-U-D-200A-1V-50

200

1

50

200

• Measurement Range: ±(0~120%) of Full Scale (FS)

• Measurement Frequency: DC ~ 5 kHz (3dB signal bandwidth ≥ 100 kHz)


4.4 Through Core I/V Conversion Standard

Model

Nominal   Input Current

(   A )

Nominal   Output Voltage

(   V )

Measurement Accuracy

(   ± 1×10-6, referenced to full-scale value)

DC

AC@53Hz

TH0500-U-T-500A-1V-10

500

1

10

200

TH0500-U-T-1kA-1V-10

1 k

1

10

200

TH0500-U-T-2kA-1V-10

2 k

1

10

200

TH0500-U-T-5kA-1V-10

5 k

1

10

200

TH0500-U-T-500A-1V-20

500

1

20

200

TH0500-U-T-1kA-1V-20

1 k

1

20

200

TH0500-U-T-2kA-1V-20

2 k

1

20

200

TH0500-U-T-5kA-1V-20

5 k

1

20

200

TH0500-U-T-10kA-1V-20

10 k

1

20

200

TH0500-U-T-500A-1V-50

500

1

50

200

TH0500-U-T-1kA-1V-50

1 k

1

50

200

TH0500-U-T-2kA-1V-50

2 k

1

50

200

TH0500-U-T-5kA-1V-50

5 k

1

50

200

TH0500-U-T-10kA-1V-50

10 k

1

50

200

TH0500-U-T-20kA-1V-50

20 k

1

50

200

• Measurement Range: ±(0~110%) of Full Scale (FS)

• Measurement Frequency: DC ~ 5 kHz (3dB signal bandwidth ≥ 100 kHz)


5. General Specification

Preheat Time

30 minutes

Temperature Performance

Working temperature: 0°C~45°C;

Storage temperature: -10°C~55°C

Humidity Performance

Working humidity: < 80% @ 30°C, < 70% @ 40°C, < 40% @ 50°C

Storage humidity: (20%~80%) R·H, non-condensing.


6. Ordering Information

TUNKIA TH0500 Precision Current Conversion Standard

Note: Please refer to the specifications in 4.1~4.4 for model selection


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