Features

Digital Multimeters VOAC7523H/7522H/7520H/7521H Features

DCV maximum resolution 0.1μV(VOAC7523H/VOAC7522H)

Isolated 2-channel input(VOAC7523H/VOAC7520H)

The VOAC7523H/VOAC7520H can measure two independent voltages. This makes it possible to measure the two potential differences, the input voltage and the output voltage in the circuit in one unit.
The figure on the right shows an example connection.

* The units of the display unit (V, A, Hz) are not displayed with the actual machine. The units of data on the left side of the display area light up by the corresponding “FUNCTION” key. The units of data on the right (V, A, Ω/AC, dBm) are illuminated by LEDs in the “SUB DISP UNITS” section in the upper right part of the display unit.

Further improved dual display and dual function

This device can perform multiple measurements in a single unit, which previously required two units, making the measurement work much more efficient.
New types have added the Settings Channel Display function to make it easier to use.

* The units of the display unit (V, A, Hz) are not displayed with the actual machine. The units of data on the left side of the display area light up by the corresponding “FUNCTION” key. The units of data on the right (V, A, Ω/AC, dBm) are illuminated by LEDs in the “SUB DISP UNITS” section in the upper right part of the display unit.
* Dual-function operation has the following limitations compared to single-function operation.

• You cannot select a sampling rate.
• The sampling rate will be delayed. (For example, in the case of a dual function with a combination of DCV and DCA, the limit is about 1 time/second. Please contact us for more details.)
• The display does not show the results of comparator operations, the type of statistical data, or attribute information such as functions, ranges, and timestamps.
• The main unit of measurement is not displayed. The units of measurement of the sub-side are displayed with the LED of “SUB DISP UNITS.”

Maximum display 509999, with the VOAC752xH Series the number of digits does not change.

Measure 1V for 1.00000V
measure 2V for 2.00000V
measure 3V for 3.00000V
measure 4V for 4.00000V
measure 5V for 5.00000V

You can connect to a LAN.

Long interval measurement up to 3,000 hours

Interval measurement, which can be configured from 10ms to 3600s, and the data storage function with up to 3000 timestamps can be used to measure from 30s to 3000 hours.

True RMS value measurement

True RMS value AC voltage and AC current can be measured.
RMS values including direct current can also be measured. (DC＋AC)V　(DC＋AC)A

Various operation functions

You can perform decibel operations (dBm, dBμ), scaling operations, moving average operations, differential operations, statistical operations (MAX, MIN, X, σ), comparison operations (output possible with DIO option), and arithmetic operations between dual functions.

DC, AC, (DC + AC) 10A range

Standard on all models.

Convenient SC-352 (Digital Input Output Interface) for Pass/Fail judgments

When a comparison rate operation is performed with the DIO interface (optional) installed, the comparator operation result is output to the HI/GO/LO of the DIO output terminals using an open collector.
The figure on the right is an example of a connection that uses this output to make a pass/fail judgment.
Indicates when the result of the comparison operation is GO.

Timing of comparator operation.
Set Yellow-HI/LO/Red-HI/LO in the comparator menu.

After the trigger is entered, the STRB signal indicating the end of measurement becomes “L,” and the threshold selected in the DIO output (Yellow or Red selection) updates either HI/GO/LO of the output and shorts to GND.
The open collector output can drive DC40V, 100mA. Since GO/NOGO judgment becomes possible with lamps, buzzers, relays, etc., it contributes greatly to the efficient construction of production lines.

Example of useful measurements using interface

By connecting to a PC with an interface, you can easily create trend graphs by loading data with Excel, etc.

Front panel

1. Easy to see fluorescent display tube

In single display, the measurement value and its attribute information (timestamp, function, range) are displayed. In dual display, the measurement values of the left and right functions are displayed. The picture above is for both left and right DCV. In the case of single display, it is also possible to display as shown in the figure on the right.

2. Signal input

The VOAC7523H/VOAC7520H has a common input for voltage, resistance, temperature and frequency, a current input for 0.5A and 10A, and a CH-B measurement input.
In the VOAC7522H/VOAC7521H, the CH-B measurement input is a 4-terminal resistance measurement input.

3. FUNCTION area

You can select the measurement items.
The function currently being measured illuminates.

4. RANGE area

You can select the measurement range.
With AUTO range, the optimum range is measured according to the input signal.

5. SAMPLE area

The measurement sample rate can be selected, the measurement value can be retained, and single measurement can be performed.

6. SUB DISP UNITS area

The units of the sub-side (right side) of the dual display are displayed with an LED light.

7. DISP area

Switches between a single-display measurement and dual-display measurement.
Use the SEL key to switch the display and switch the main/sub-function.

8. UTILITY area

You can select operation items, save and read measurement data and panel settings, and set system settings.

Rear panel