This is a multi-function multimeter VOAC7413 produced by Iwatsutsu company. It has the functions of power measurement, high-speed automatic measurement, high-resolution measurement, conductivity test, and rich optional modules
The VOAC7413 is Iwatsu's high‑performance digital multimeter featuring a 40999‑count A/D converter, fast 100 samples/s FAST mode, true‑RMS capability, and a wide dynamic range for voltage, current, resistance and temperature measurements. It supports auto‑range, averaging, and various optional modules such as printer, GP‑IB, BCD output, D/A converter, battery and voice units.
Key specifications include a full‑scale of 40999 counts, input impedance of about 2 MΩ with <100 pF capacitance, maximum continuous voltage of 1100 V DC, and high resolution (DCV 1 µV, ACV 10 V, resistance 1 mΩ, current 10 nA). Accuracy is CMR ≥ 110 dB, NMR ≥ 55 dB, and temperature coefficient OC‑18 °C/28 °C‑50 °C. This manual is written in Japanese.
| Maximum sample rate (FAST mode) | ≈100 samples/s |
|---|---|
| CMR noise rejection | ≥110 dB |
| NMR (SLOW/MID) | ≥55 dB |
| Input impedance | ≈2 MΩ, ≤100 pF |
| Maximum continuous voltage | 1100 V DC |
| Resistance resolution | 1 mΩ |
| Current resolution | 10 nA |
| Temperature coefficient | OC‑18 °C, 28 °C‑50 °C |
The multimeter can sample at about 100 times per second in FAST mode.
Yes, it provides true RMS measurement for both AC and DC signals.
Optional units include a printer, GP‑IB interface, BCD output, D/A converter, battery backup, and voice unit.
The input impedance is approximately 2 MΩ with less than 100 pF capacitance.