Hangzhi Precision

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Frequently Asked Questions​

We can tell you everything Current Measurement

Selections and configurations

everything you need to know about using current transducers and testers

What is the typical response time of Hangzhi high precision current sensor and AC / DC tester products?

AIT Series real-time response is 100A/us, and; DIT series, the standard modes with response time of 200ms, and minimum time of 10ms can be customized, and, HIU Series Tester with response time of 300ms, response time is customizable

Does Hangzhi high precision current sensor with current output or voltage output?

AIT series current sensor: both current and voltage output products are available DIT Series sensors are digital output via RS232/485. IIT series: only current output available HIT series: only current output available RIT Series: voltage output

If the voltage output type is required, what's the solution?

If the input requirement in the instrument side is voltage input, then the current sensor can be configure for voltage output with external or built-in precision resistance.

Does customization to voltage output affect the accuracy?

Except the accuracy of the high precision current sensor itself, the system overall accuracy is also affected by the precision of the selected resistance and by its temperature drift.

Some cool tips you should know

01.

What is the power supply required for Hangzhi high precision current sensor?

Most current sensor products need to be supplied with +/-15V, but it varies in some current sensor which used for measuring bigger current, so the technical specification should be carefully followed before design or configure for your application.

02.

How to calculate the power consumption of Hangzhi current sensor?

The power consumption of the high transducer current sensor includes output consumption and standby consumption. Take AIT60 as the example: The output consumption: 0.1A x 15v=1.5W The typical standby consumption current is about 0.03A, so the output consumption: 0.03 x 15V = 0.45W So the total consumptions is 1.95W. The consumption of other current transducer products can be calculated by using the same concept above according to their specification.

03.

How are the aperture sizes of Hangzhi current sensor products? Is the customization available?

Currently, the aperture of standard current sensors is 26mm, 42mm and 90mm depending on the measuring range of the current transducers. But the customization is also available to adapt your applications, please CONTACT US for details.

04.

Do Hangzhi current measurement products come with the third party test report?

All Hangzhi products come with only our internal quality certificates by default, but the third party test report is available at customer’s request and cost.

05.

Does Hangzhi High-precision AC / DC tester need to be calibrated once a year?

In technical terms, the AC / DC tester products are required to be calibrated annually. But the local regulations of customer’s region need to be followed.

06.

Why the other brands of Hall sensors have phase errors and data acquisition noise in the process of measurement ? Does Hangzhi current sensor have these issues?

Due to the long response time, unfixed zero point and large temperature drift of Hall sensor, its measurement output is easily affected by temperature, so the accuracy of hall sensor is low. Hangzhi’s high precision current transducer products are fluxgate principle sensors with real-time response, zero point fixed, almost zero temperature drift, high precision, so there is no such problems.

07.

What test method is used to verify the accuracy of current transducer?

FLUKE 5522 Multi-Product Calibrator + FLUKE 8508A Reference Multi-meter are used for internal quality control and test. Externally, the third party calibration is through the Chinese Institute of Metrology.

08.

Will the Hangzhi high precision current sensor be damaged after overload and satiation?

When the primary current is over the specified measurement range and the transducers will be in overload mode to avoid the damage to the sensor itself. In this mode, the transducers will be working in non-zeroflux mode, that the secondary current remains at specified maximum output, the secondary and primary currents are not in proportional.

09.

If Hangzhi 10PPM high precision current sensor was chose to develop high precision instrument, how to choose the output resistance?

According to the customers’ specific requirements of the developing high precision instruments, paying attention to the temperature drift and precision of resistance. For details, please refer to < How to select a high-precision current sensor to connect a sampling resistor >

10.

For high precision current sensor and industrial-grade current sensor, if the instrument requires the voltage input with 2V and AIT300 is selected for the current measurement, how to select the resistance?

The turns ratio of AIT300 is 2000:1, then the full scale output current is 0.2 A. According to the principle of U = IR, then R = 2V / 0.2 A = 10 Ω, so you should have a resistance of 10 ohms. At the same time, we also need to make sure the selected resistor is within the specified burden resistor range.

11.

What are the parameters of high precision current sensor should be concerned during selection?

Indicators to be concerned are: 1.Output signal type 2.Precision 3.Maximum AC-DC current value to be measured 4.Bandwidth 5.Aperture 6.Temperature drift and response time

12.

Compared with hall and closed loop hall sensor, what are the advantages of Hangzhi high precision current sensor / transducer?

1. Fixed zero point 2. Zero drift 3. Shorter response time (real-time response) 4. Up to PPM precision 5. Can both test AC and DC 6. Noiseless

13.

What is the definition of RD and RG for AC/DC Tester?

RD is reading accuracy, while RG is full scale accuracy.

14.

How to read the data of Hangzhi Digital Current Sensor / transducer? And how big the storage space?

Connect computer to read by Hangzhi upper computer software, the storage space is like the size of computer memory. In addition, the standard record interval is 100ms, and 100 points of 1-second record can be customized.

15.

Does Hangzhi current sensor and the AC / DC Tester have differential range? How to switch from high current to low current?

The Hangzhi high precision current transducer has no different range, and it can guarantee superior linearity by itself. Hangzhi’s tester and standard meter was built-in range, automatic switch, no manual shift is required.

16.

Is the accuracy of Hangzhi high precision current sensor full range accuracy or reading accuracy?

The accuracy of Hangzhi current sensor is reading accuracy from 10% to 100% full range.

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