UNI-T UT90A Specifications download pdf (Page 10)

Model UT90A: OPERATING MANUAL

10

To avoid damages to the built-in fuse and the

Meter, please do not attempt parallel connect

the test leads with any circuit while the test

leads are inserted into the current terminal.

For the safety requirement, when measure

high current, every measure time should< 10

seconds and the time between two

measurements should > 15 minutes.

The measurement ranges of DC current are:

200mA,2mA,20mA,200mA,20A; The

measurement ranges of AC current are:

200.0µA,2.000mA,20.00mA,200.0mA and

20.00A. To measure current, do the following:

1 Insert the red test lead into the“µA

mA ”or“20A”terminal and the black test

lead into the COM terminal.

2 Set the rotary switch to“A ”or“A ”,and

Connect the test leads across with the

circuit being measured.

3. The measured value shows on the display,

it is an effective value of sine wave (mean

value response).

Note

l Turn off the power of circuit being

measured before series connection

between the Meter and the circuit.

l Use proper terminals and ranges for the

measurement.

l Please use the ranges from high to low if

the current not being confirmed.

l When current measurement has been

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