VI U1231A/U1232A/U1233A User’s Guide
Environmental Conditions
This instrument is designed for indoor use and in an area with low
condensation. The table below shows the general environmental
requirements for this instrument.
Environmental condition Requirement
Operating temperature Full accuracy from –10 °C to 55 °C
Operating humidity
Full accuracy up to 80% RH (relative
humidity) for temperature up to 30 °C,
decreasing linearly to 50% RH at 55 °C
Storage temperature –40 °C to 60 °C
Altitude Up to 2000 meters
Pollution degree 2
The U1231A/U1232A/U1233A Handheld Digital Multimeter complies with the
following safety and EMC requirements:
• IEC 61010-1:2010/EN 61010-1:2010
• USA: UL 61010-1 (3rd Edition)
• Canada: CSA C22.2 No. 61010-1:2012