ADCMT 7351A User Manual

7351 Series Digital Multimeter Operation Manual
8.3 Calibration
8-5
8.3 Calibration
To maintain the measurement accuracy of this instrument, perform calibration at least once a year; warranty
period.
8.3.1 Preparing for Calibration
1. Power supply
Use an AC power supply in a voltage range listed in Table 3-4 and frequency of 50 Hz or 60 Hz.
2. Environment
Perform calibration in following conditions.
Temperature: +23 3C
Humidity: 70% or less
An area free from dust, vibration, wind, and noise
3. Warm-up time
Perform calibration after allowing a warm up time of 60 minutes or more.
Sufficient warm-up time is also required for the instrument used for calibration.
8.3.2 Calibration Standards
Calibration standard Operation range Accuracy
DC voltage 190 mV - 1000 V 15 ppm
AC voltage 5 mVrms 1 kHz sinusoidal wave 1400 ppm
10 mVrms - 100 mVrms 1 kHz sinusoidal wave 1000 ppm
100 mVrms - 700 mVrms 1 kHz sinusoidal wave 200 ppm
Resistance 190 50 ppm
1.9 k - 190 k20 ppm
1.9 M50 ppm
19 M, 100 M1000 ppm
DC current 190 mA - 1.9 A 150 ppm
10 A 1000 ppm
AC current 1.9 mA - 190 mA 1 kHz sinusoidal wave 500 ppm
1.9 A 1 kHz sinusoidal wave 1000 ppm
10 A 1 kHz sinusoidal wave 1000 ppm

ADCMT 7351A Specifications

General

Brand	ADCMT
Model	7351A
Category	Multimeter
Language	English