Specifications

C-1 Measuring DC Voltage
1) / Button should not be pressed down
and LCD should not display “AC” Symbol.
2) Connect the black test lead to “COM” jack and
red test lead to “ V ” jack.
3) Set the rotary switch to “ V ”
4) Connect the test leads across with the object
to be measured. LCD appears the measuring
value and also the polarity of the red test leads.
Caution
1) If magnitude of the voltage is unknown, always
start with the highest range and reduce until
satisfactory reading is obtained.
2) If “1” is shown on the LCD, it means the Meter
is overloaded, then set the measuring range
to higher.
3) “ ” means never exceed the maximum input
limits, 1000V, otherwise internal circuit of the
Meter will be damaged even though it is still
possible to display higher voltage value.
4) Take extra care of voltage leakage when
measuring high voltage.
C-2 Measuring AC Voltage
1) Press down / button to display "AC" on
LCD. If + / button is not pressed, it
means the measuring value is the sum of
Direct and Alternate Current ( + ). While
if + / button is pressed, it means the
measuring value is a pure Alternate Current
TRMS.
Model UT57: OPERATING MANUAL
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