Tektronix A621 and A622 Current Probes: An Excellent Choice for Accurate Current Measurement

In today's era of rapid technological development, accurate current measurement is of critical importance in many fields such as electronic engineering, power systems, and industrial automation.

As a well-known brand in the measurement industry, Tektronix provides high-quality solutions to meet different measurement requirements with its A621 and A622 current probes. Next, let's take an in-depth look at these two current probes.

1. Product Overview

Both A621 and A622 current probes are precision-developed measurement tools from Tektronix, designed to provide users with accurate and reliable current measurement.

2. Features and Advantages

1. A621 Current Probe

    - The AC frequency range is 5Hz - 50kHz, covering a wide low-frequency AC current measurement range, which is suitable for low-frequency current measurement scenarios in many industrial and power applications.

    - It features a wide measurement range, capable of measuring current with a peak value from 100mA to 2000A. It can handle both precision measurement of small currents and industrial testing of large currents with ease.

    - Three output options are available: 1mV/A, 10mV/A, 100mV/A. Users can flexibly adjust the output ratio according to the input requirements and measurement accuracy needs of the test instrument, to achieve the optimal measurement performance.

    - It can be used with a variety of measurement equipment such as digital multimeters, thermometers, oscilloscopes, etc., featuring excellent compatibility and versatility.

2. A622 Current Probe

    - The AC/DC frequency range is DC - 100kHz. It can not only measure AC current, but also accurately measure DC current, which is suitable for a wider range of current types and more complex measurement environments.

    - With a measurement range of 50mA - 100A peak, it delivers excellent performance in low-to-medium current measurement, and is especially suitable for current measurement requirements in fields such as electronic circuits, precision instruments and other fields.

    - It provides voltage output to oscilloscopes via Hall effect current sensor, with output ratios of 10mV/A and 100mV/A, ensuring the stability and accuracy of the measurement signal.

III. Technical Specification Comparison

From the above technical specification comparison, it is clear that the A621 has advantages in measuring large current and low-frequency AC current, while the A622 features outstanding performance in measuring DC current, medium and small current, and covers a wider frequency range.

IV. Application Fields

1. Motor Drivers

    - During the R&D, debugging and maintenance of motor drivers, accurate measurement of input and output current of the motor is required to evaluate the performance and efficiency of the driver. A621 is suitable for high-current measurement of high-power motor drivers, while A622 is more suitable for small and medium current and DC current measurement of small or precision motor drivers.

2. Inverters

    - For monitoring and analyzing the output current of inverters, A621 can handle high-current measurement when the inverter works under high-power conditions, while A622 can provide more accurate current measurement for the control circuit and low-power output section of the inverter.

3. Power Supplies

    - In the design and testing of power supplies, whether switching power supplies or linear power supplies, A621 and A622 can help measure the output current of the power supply to ensure its stability and reliability.

4. Avionics

    - In avionics equipment, accurate current measurement is required for various electronic components and systems. Due to its compact size and wide frequency range, A622 is more suitable for current measurement in compact spaces and complex electromagnetic environments of avionics equipment.

V. Advantages and Disadvantages Analysis

1. Advantages of A621

    - Capable of measuring extremely large current peaks, suitable for current monitoring of large power equipment and industrial systems.

    - Provides multiple output ratios for easy matching with different measuring instruments.

    - Relatively large conductor diameter compatibility allows measurement of current in thicker wires.

   Disadvantages of A621

    - Narrow frequency range, limited measurement capability for high-frequency current.

    - Relatively large size and weight, which may be inconvenient for measurement in some confined spaces.

2. Advantages of A622

    - Supports both AC and DC current measurement, with a wider application scope.

    - Wider frequency response, capable of capturing higher-frequency current changes.

    - Smaller size and lighter weight, easy to carry and operate in confined spaces.

   Disadvantages of A622

    - The maximum measurable peak current is relatively small, so it is not suitable for measurement scenarios with ultra-large current.

    - Relatively few output ratio options are available.

VI. Ordering Information

Users can select and order based on specific requirements 

A621：2000A AC Current Probe BNC 

A622：100A AC/DC Current Probe BNC

VII. Recommended Accessories

Recommended accessories such as 012 - 1450 - xx Adapter can further improve the operation convenience and measurement accuracy of the probe.

In summary, Tektronix A621 and A622 current probes each have their own advantages in different application scenarios. When selecting, users should comprehensively consider factors such as current range, frequency range, measurement accuracy, and application environment based on actual measurement requirements, so as to select the most suitable current probe for their needs.

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