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Digital Meter

AC Scaling Meter

MODEL 3125

  • ■ DIN size 48×24 mm, RMS value type
  • ■ Available with scaling function
  • ■ Available with zero-suppress function

Operation manual

Standard Specifications

Model Designation

3125 - - -

①Measuring Input

Code Measuring Range Input Resistance Accuracy *1 Overload
22 99.99 mV rms 1 MΩ ±(0.2% of rdg + 10 digit) AC 10 V
23 999.9 mV rms 1 MΩ AC 100 V
24 9.999 V rms 1 MΩ AC 350 V
25 99.99 V rms 10 MΩ AC 350 V
26 300.0 V rms 10 MΩ AC 350 V
32 99.99 µA rms 1 kΩ ±(0.3% of rdg + 10 digit) AC 20 mA
33 999.9 µA rms 100 Ω AC 50 mA
34 9.999 mA rms 10 Ω AC 150 mA
35 99.99 mA rms 1 Ω AC 500 mA
36 999.9 mA rms 0.1 Ω *2 ±(0.5% of rdg + 10 digit) AC 2.1 A
37 2.000 A rms
*1 Accuracy:
Defined at 23 ± 5°C, 45 to 75% RH.
Defined with sign wave of input frequency 40 Hz to 1 kHz.
Defined ±0.2% F.S. for less than 10% input value.
*2 Shunt resistance:
with 0.1 Ω external resistance.
Temperature coefficient:
±300 ppm/°C (Temp. range 0 to 50°C)
Crest factor:
4 (The peak of 3125-26 is 500 V, the peak of 3125-36, -37 is 3 A)
Display will be 0 when the rated input will be less than 0.1%

②Display Color

Code Description
Blank Red LED
Green LED

③Option

Code Input
Blank null
A02 Fixed 100 digit to 0

General Specifications

Display 0 - 9999 red or green LED (character height 10 mm) with zero-suppress function.
Scaling function Full scale display 0 - 9999. Offset display 0 - 9999. It is memorized to the EEPROM.
Decimal point Selection is possible by operating front panel switch.
Over-range indication flashing with 130% display. When exceeded 9999, flashing display will be 0000.
Resolution 1/10000
Sampling rate 1 time/sec.
Display cycle 1s
Input configuration Single ended
A/D conversion ⊿-Σ conversion system
Insulation resistance DC 500 V More than 100 MΩ
Withstand voltage Between input terminal and external case: AC 500 V each for 1min.
Between power supply terminals and external case: AC 500 V each for 1min.
Between power supply terminals and input terminals: AC 500 V each for 1min.
Power supply DC 12 to 24 V
Tolerance of source voltage DC 9 to 32 V
Power consumption DC 12 V Approx. 60 mA
DC 24 V Approx. 45 mA
Operating temperature 0 to 50°C
Storage temperature -20 to 70°C
Weight Approx. 60 g

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