GDM-8255A/8251A is a digital multimeter produced by Instek, which has 5 1/2 bits, 199999/119999 counts, VFD dual display screen, measurement items including DCV, ACV, DCA, ACA, 4/2wire R, temperature, frequency, Beep, conduction test and other functions, supports Max./Min., REL, dBm, Compare Math, Store/Recall, dB, filter function, Auto/Manual range switching, True RMS (AC, AC+DC), measurement rate (DCV) Slow 10 reading/s 5 1/2 digits Medium 30 reading/s 4 1/2 digits Fast 60 reading/s 3 1/2 digits, supports USB, RS-232C, digital I/O interfaces, and can measure up to 32CH (GDM-8255A), and can optionally add 16CH scanning cards (2 pieces)
The GDM-8255A and GDM-8251A are multimeters that provide DC and AC voltage, current, resistance, frequency, and temperature measurements. They feature a dual‑display VFD, auto/manual range selection, true RMS, and various calculation functions such as dB, dBm, and hold.
The instruments support USB, RS‑232C, and digital I/O connections and come with accessories such as test leads, a calibration key, and a 16‑channel scanner card. Safety notes and operating temperature limits are included in the manual. This manual is written in Japanese.
| DC Voltage Range | 100 mV, 1 V, 10 V, 100 V, 1000 V |
|---|---|
| DC Current Range | 10 mA, 100 mA, 1 A, 10 A |
| AC Voltage Range | 100 mV, 1 V, 10 V, 100 V, 750 V |
| AC Current Range | 10 mA, 100 mA, 1 A, 10 A |
| Frequency Measurement Range | 20 Hz – 300 kHz |
| Temperature Measurement Range | 0 °C – 300 °C (J, K, T‑type) |
| Display | Dual VFD |
It offers five DC voltage ranges: 100 mV, 1 V, 10 V, 100 V, and 1000 V.
It measures temperature with J, K, and T‑type thermocouples from 0 °C to 300 °C.