NF's ZM series LCR meters cover a wide frequency range, from the low-frequency region of 1 mHz up to
5.5 MHz. Supports a wide range of applications, from materials research to component production lines, by means of high-speed, low measurement fluctuation.

ZM2376

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ZM2371/ZM2372

Supports a wide range of high-speed, high-precision measurements.

Wide measurement frequency range and high-resolution settings

The ZM2371 and ZM2372 have a measurement frequency range of 1 mHz to 100 kHz and a setting resolution of 5 digits. The measurement frequency range of the ZM2376 is 1 mHz to 5.5 MHz, and the setting resolution is 6 digits. It is suitable not only for measuring general electronic components, but also for evaluating the impedance of batteries and various materials.

Highly repeatable measurement results

These are the results of repeated measurements of the same sample for 200 times under the same measurement conditions. The deviation of the measurement results of ZM2372 is about 0.01% or less, and the ZM2376 is even better. And highly repeatable measurement results are very important for impedance measuring instruments.

- Measurement of 1nF capacitor

Measurement conditions (time: 5 ms, frequency: 100 kHz, signal level: 1 V)
Deviation of 200 measurement results

ZM2736

ZM2732

Protection against discharge

With a general-purpose measuring instrument, if an electrolytic capacitor with accumulated electric charge is connected, the input circuit may be damaged due to discharge. The ZM series has a protection function against discharge and protects the input circuit from energy with a maximum of 4J. (Supplementary value for ZM2376 at the voltage of 250 V or less) It is possible to prevent incidents when components with accumulated electric charge are accidentally connected during measurements.

Wide range of test signal and ALC functions

The measurement signal level can be set at a resolution of 3 digits to 10 mVrms to 5 Vrms, or 1 μArms to 200 mArms. In addition, by means of the automatic level control (ALC) functions, constant voltage and constant current mode can be set, making it possible to perform measurements with high reproducibility at a stable signal level that takes into account the voltage and current dependence of the sample.

High speed measurement

Measurement speed is selectable from 5 levels: RAP (rapid) , FAST, MED, SLOW and VSLO (very slow). When set to RAP, high-speed measurement at 2 ms (1 kHz/1 MHz) or 10 ms (120 Hz) can be performed. This high-speed, high-precision LCR meter will help to improve the measurement efficiency of production lines and automatic inspection equipment.

DC bias voltage

The built-in DC bias power supply of 0 to +2.5 V for ZM2371 and ZM2372, and 0 to +5 V for ZM2376 enables the measurement of polar components such as electrolytic capacitors. The ZM2376 can be used to measure impedance of battery by eliminating the DC voltage of it.

Also there is an optional DC bias voltage adapter for larger DC voltages. A bias voltage of up to ±40 V can be applied to the sample with an external DC power supply. So it is possible to test the voltage dependence of MLCCs (multilayer ceramic capacitors) as well.

DC resistance (DCR) measurement

It is possible to perform DC resistance measurements on the winding resistance of such equipment as coils or transformers.
The measured values of the inductance can be displayed in the primary parameters at the same time as the DC resistance in the secondary parameters.

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Enhanced features for production lines!

Contact check function

ZM2372

4 terminal contact check

In order to prevent measurement and selection errors due to poor contact between the measurement tip and components, ZM2372 performs a contact check measurement at four terminals to determine defects. This eliminates the output of defective products. (Additional time required for contact check: 4 ms)

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contact check

Step1:
Checks whether there is continuity along the dotted lines (contact check).Determines there is a defect if contact is defective.

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Once the contact failure is detected, ZM2372 allows the measured value “NC” to appear without performing normal measurement.

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Step2: Measures along the dotted lines (main measurement)

ZM2376

Contact check and low capacitance check

Detects abnormally low capacitance, abnormal voltage and current, and can detect contact failures with little additional time.

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Triggered synchronous drive

This function can be used to drive a sample for a period of time while contact is being made.
When performing measurements of large-capacity capacitors, it is possible to reduce the damage caused by the contact by removing the sample.
For samples with hysteresis characteristics, when measurements are performed in a short period of time, the measured values have larger fluctuations. By using triggered synchronous drive, the relationships between the time and the phase of the drive signal applied to each sample and the acquired signal are made constant. This suppresses deviations of the measured values ??and makes it possible to significantly reduce the measurement time.

Deviation display

When measuring a component, a preset value can be set and the deviation and the deviation % of the measured value compared with the preset can be displayed.
This can be useful for making acceptance judgments against standard component tolerance values as well as for temperature characteristic tests.

Comparator

A maximum of 14* primary parameters can be classified in bins, and measurement results can be sorted on a set of upper and lower limits that have been set by secondary parameters. Sorting is possible by measured value, deviation or deviation %, and the comparator results can be output to the handler interface*. In addition, a beeper can be turned on depending on the comparator results.
Using the limit determination function with the remote control interface, is also possible to determine the upper and lower limits (for each one set) of the primary parameters and secondary parameters.
*ZM2371: 9 classifications max. Not equipped with handler interface.

Multi-measurement (ZM2376 only)

Multi-measurement is a function used for overall acceptance judgments by performing up to 32 steps for each sample. Multiple measurement conditions can be set for each step such as measurement frequency, measurement signal level, internal DC bias, and measurement parameters.
Measurements and limit determinations can be performed based on the set of upper and lower limits of the primary parameters and the set of upper and lower limits of the secondary parameters.
*This function available only on ZM2376.

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Interfaces

Equipped with various standard interfaces for remote control. Integrates into production lines and automatic inspection systems without any additional options.

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Interfaces

ZM2371

ZM2372

ZM2376

USB

RS-232

GPIB

 

LAN

   


Option

Handler

ZM2376 (Rear panel)

Other functions

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Correction functions (Open correction, short correction, load correction, cable length correction)

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Setting and correction value memory (32 sets, switchable to be saved to non-volatile memory)

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Voltage and current measurement function

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Sample program (C #, VB.NET) included

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LabVIEW driver included (ZM2371 and ZM2372)

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IVI instrument drivers included (LabVIEW drivers automatically generated on the LabVIEW system) (ZM2376)