User:Uwe Hermann

http://www.hermann-uwe.de

DMM accuracy

This is a small comparison of some DMMs, all measuring the same voltages etc. on the same Voltagestandard DMMCheck Plus device using the same multimeter cables.

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  Device, calibration

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  PCB, top

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  PCB, bottom

Device	5V DC	5V AC	1mA DC	1mA AC	100Ω	1kΩ	10kΩ	100kΩ	100Hz	Duty cycle
Voltcraft VC-820	4.98V	5.53V	1.00mA	1.08mA	100.2Ω	1.000kΩ	10.03kΩ	100.2kΩ	99.9Hz	49.9%
PeakTech 3410 (Metex ME-31)	5.01V	5.55V	1.000mA	1.111mA	100.8Ω	1.000kΩ	10.000kΩ	100.1kΩ	—	—
UNI-T UT61E	4.995V	5.026V	0.999mA	1.004mA	100.63Ω	0.9983kΩ	9.996kΩ	100.01kΩ	100.0Hz	49.9%
V&A VA18B	5.014V	5.540V	1.00mA	1.10mA	101.2Ω	1.002kΩ	10.05kΩ	100.4kΩ	99.99Hz	49.98%
MASTECH MAS345	5.01V	5.60V	1.003mA	1.111mA	100.6Ω	0.999kΩ	9.99kΩ	99.9kΩ	—	—
Digitek DT4000ZC	4.99V	5.53V	0.99mA	1.06mA	100.5Ω	1.000kΩ	9.99kΩ	100.2kΩ	99.9Hz	49.9%
UNI-T UT61D	4.992V	5.000V	1.00mA	0.92mA	100.2Ω	0.997kΩ	9.99kΩ	100.0kΩ	99.9Hz	49.9%
Victor 86C	5.01V	5.57V	0.99mA	1.10mA	100.4Ω	0.999kΩ	10.91kΩ	100.1kΩ	99.9Hz	49.9%