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UT256A User Manual
To disable the
auto power off
function, press and hold the
SELECT
button in the off state, and then turn on the
meter. The
buzzer will make five consecutive beeps. To
resume the
auto power off function, restart the meter.
About 1 minute before auto power off, the buzzer will make
five consecutive beeps. If there is no operation within the 1
minute, the meter will automatically shut down accompanied
by one long beep.
2) Buzzer: When any button is pressed or the function switch
is turned, if it is valid, the buzzer will make one beep (two
short beeps indicating invalid button operation). In the
voltage or current measurement, the buzzer will beep
continuously to indicate the over range.
IX. Specifications
1. General Specifications
a. Max display: 6000 counts
b. Polarity display: Auto
c. Overload display: "OL" or "-OL"
d. Low battery indication: The "
e. Test position error: If the measured source is not placed
in the measurement position of the open jaw fork in
measuring current, an error or erroneous reading will be
produced.
f. Drop protection: 2m
g. Jaw opening: 15mm
h. Battery: 2×1.5V AA batteries
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" symbol is displayed.
UT256A User Manual
i. Auto power off: 15 minutes (can be disabled)
j . Dimensions: 220mm×58.5mm×38mm
k. Weight: About 260g (including batteries)
l. Operating altitude: ≤2000m
m. Operating temperature and humidity: 0°C~30°C (≤80%RH),
30°C~40°C (≤75%RH), 40°C~50°C (≤45%RH)
n. Storage temperature and humidity: -20°C~60°C (≤80%RH)
o. Electromagnetic compatibility: RF=1V/m, overall accuracy
= specified accuracy + 5% of range; RF>1V/m, not specified
2. Electrical specifications
a. Accuracy: ± (a% of reading + b digits), 1 year calibration
cycle
b. Ambient temperature and humidity: 23°C±5°C; ≤80%RH
Caution:
To ensure measurement accuracy, the operating temperature
should be within 18°C~28°C and the fluctuation range should
be within ±1°C. When the temperature is <18°C or >28°C,
add temperature coefficient error 0.1 x (specified accuracy)/°C.
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