2) If “1” is shown on the LCD, it means the Meter
is overloaded, then set the measuring range
to higher.
3) “
” means the maximum input current is 200mA,
overload will cause the burn of fuse. 10A range
has 10A/250V fuse protection
C-4 Measuring AC Current
1) Press down / button to display “AC “on
LCD. If + / button has not been
pressed down, it means the measuring value
is the sum of Direct and Alternate Current (
+ ). While + / has been pressed
down, it means the measuring value is a pure
alternate current effective value.(TRMS)
2) Connect the black test lead to “COM” jack.
When measuring 200mA or below, connect
the red test lead to “mA” jack. When measuring
10A or below, connect the red test lead to
“10A” jack.
3) Set the rotary switch to “A ”
4) Connect the test leads in series with the object
to be measured.
Caution
1) Please refer to “DC Current Caution” 1, 2, 3.
2) The input value should be 10% more
than the selected ranges to fulfill the accuracy
requirement.
Model UT57: OPERATING MANUAL
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