• TD3250 supports direct measurement of three-phase voltage in the range of 10 V ~ 576 V, direct measurement of three-phase current from 0.05 A ~ 12 A, and clamp-based measurement of three-phase current from 0.1 A ~ 1 kA. For energy metering, it includes an electric pulse input interface, paired with a portable optical sensor.

• Application 1 (Direct Measurement of Current): applicable to the calibration of single-phase / three-phase voltage source, current source, power source, etc. in the laboratory or on site.

• Application 2 (Use Clamp for Current): When testing the current of an energy meter on-site, it is usually necessary to wait for a power outage to disconnect the circuit, then either insert a standard ammeter into the loop for testing or remove the meter and test it in the laboratory using a standard source method. However, by using a clamp meter for current measurement, there is no need to disconnect the circuit. Simply clamp the current-carrying wire into the jaws, and real-time measurement can be performed online. This method allows for quicker and more convenient on-site testing, meeting the requirements for routine inspection of instrument operating conditions.

• CT transformation ratio test: use large current clamp for primary signal of CT, and with small current clamp for secondary signal of CT; Calculate the transformation ratio of CT and the phase relationship of primary/secondary current. Help judge if the CT runs well.

• Note: Standard configuration for 5 A clamp, which can be used for the secondary side, If user need other clamps should indicate the optional specification in the order.

S/N

Function

1

LAN/USB communication terminals are used to connect to a computer for data transfer via management software.

2

The instrument power supply socket can be used for mains power supply or to charge the lithium battery.

3

Reserved functional interface for expanding additional environmental measurement capabilities and more.

4

Pulse signal input terminal, compatible with optical sensors for energy metering.

5

Clamp current terminal, enabling clamp meter measurement of currents ranging from 0.1 A to 1 kA.

6

Three-phase voltage terminal: Allows for a wide voltage measurement range of 10 V to 576 V with a single connection.

7

Three-phase current terminal: Directly measures currents from 0.05 A to 12 A.

8

Pulse signal output terminal: Generates standard energy pulses for higher-level calibration and verification.

9

LCD touch color screen with multi-power display, fully touch-operated, greatly enhancing the instrument's ease of use.

• Large LCD screen: Color LCD with high brightness, supports touch operation, offering comprehensive functionality that is simple and convenient to use..

• Front panel wiring: convenient for the user to replace the test lead.

• 220 V mains power supply or the lithium battery mode available.

• Built-in large-capacity memory for quickly recording test data of the equipment being tested on-site, capable of storing up to thousands of entries. After calibration is complete, the data can be transferred to the accompanying computer management software.

• Solution advantages: This combined operation method effectively enhances ease of use, making it suitable for a variety of application scenarios.

• The volume is equivalent to the conventional tool box, weighs about 8 kg.

S/N

Function

1

Accurately measure/display the amplitude and phase of voltage and current of each phase.

2

Accurately measure the phase between voltage and current of each phase, and visually display them in the form of phasor diagram.

3

Automatically identify the actual results of voltage and current, including phase sequence display.

4

The trend chart display function of the measuring channel can display the trend change of the measured electricity quantity with time.

5

Users can customize single or multiple power waveforms for display.

S/N

Function

1

It can measure 2nd ~63rd harmonics and display the amplitude or content.

2

Display the phase value of each harmonic.

3

Display the waveform after harmonic superposition.

4

Display the phase of each harmonic. The spectrum of each harmonic is displayed visually in the form of histogram (fundamental wave is 100%).

• The equipment can store and manage the test data on site.

• The selected data can be saved to the mobile USB flash disk.

• Optional computer-specific testing software can organize and generate test reports from data exported via USB drive, improving testing efficiency.

• Software functionality can be customized according to customer needs, with support for future software upgrades to accommodate new testing requirements.