LCR Meter ZM2371/ZM2372/ZM2376

High-precision benchtop impedance measuring instrument suitable for evaluation of electrical parts and batteries

Wide measurement frequency range

The ZM2371 and ZM2372 (both max. frequency of 100kHz) are suitable for general-purpose electronic component measurement. The ZM2376 (max. frequency of 5.5MHz) is suitable for measuring high frequency components such as small inductances used in smartphones. The big advantage of the ZM series is that it can measure from a low frequency of at least 1mHz. One method for evaluating battery characteristics is to measure the internal impedance of the battery. To evaluate high performance batteries such as lithium batteries, internal impedance measurements at low frequencies in the millihertz range are required.

Highly repeatable measurement results

These are the results of 200 repeated measurements of the same sample 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. Repeatable measurement results are crucial 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

DC bias voltage (Built-in)

The ZM2376 has a built-in DC bias power supply of 0 to + 5V. When measuring the internal impedance of the battery, it is necessary to cancel the DC voltage of the battery. By using a DC bias power supply, impedance measurement is possible in the optimum voltage range.

DC bias voltage (External power supplies)

If the voltage of the built-in DC bias power supply is insufficient, there is an option that can be combined with an external voltage source. A bias voltage of up to ± 40V can be applied using a DC bias adapter that connects directly to the ZM series output terminals. An external power supply for DC bias is required separately.

Automatic level control (ALC)

The automatic level control (ALC) function sets the measured signal level to constant voltage or constant current. For example, it is possible to continuously measure a current-dependent element under the set current conditions.

Protection against discharge

In a general LCR meter, if a charged capacitor is connected, the measurement circuit may be damaged by the discharge. The ZM series has a discharge protection function that protects the input circuit from up to 4J of energy.

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.

Interfaces

Equipped with various standard interfaces for remote control. Integrates into production lines and automatic inspection systems without any additional options.
Interfaces ZM2371 ZM2372 ZM2376 USB ✓ ✓ ✓ RS-232 ✓ ✓ ✓ GPIB   ✓ ✓ LAN     ✓ Option Handler ✓ ✓

Functions suitable for product inspection in parts production plants

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.

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)

Step1: Checks whether there is continuity along the dotted lines (contact check).Determines there is a defect if contact is defective. Once the contact failure is detected, ZM2372 allows the measured value “NC” to appear without performing normal measurement. 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.

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.

Other functions

Correction functions (Open correction, short correction, load correction, cable length correction) Setting and correction value memory (32 sets, switchable to be saved to non-volatile memory) Voltage and current measurement function Application software (Bundled and download) /english/sup/prosup/software/index.html Sample program (C #, VB.NET) included LabVIEW driver included (ZM2371 and ZM2372) IVI instrument drivers included (LabVIEW drivers automatically generated on the LabVIEW system) (ZM2376)