Electrical Symbols; Model Comparison - UNI-T UT255A Operating Manual

the ratio or reduced ratio. One thing to mention is:
considering the leakage current should be lower than 500uA for a running
arrester, the meter can tell us the working status of the arrester. If checked
out with leakage current higher than 500uA, the arrester may have been
contaminated, moisture-affected or experienced aging, because the higher
flow of leakage current it is, the more severe phenomena above are.
II. Electrical Symbols
Extreme danger! To avoid personal injury or accidents in case of
electric shock, observe safety rules strictly.
Danger! To avoid personal injury or accidents in case of electric
shock, please follow safety notes.
8
under general circumstances,
under general circumstances
Warning! Confirm to the safety instructions, otherwise it may cause
personal injury or damage to the meter.
Alternating Current AC
Direct Current DC
III. Model Comparison
Range
Model Resolution
UT255A 10uA 600A 10uA
UT255B 10uA 600A 10uA
Jaw Size Notes
General Type
33mm
Special, with
wireless
33mm
transmission
function
9