UNI-T UT805 Operating Manual page 25

Model UT805: OPERATING MANUAL
Press ACI or DCI button, then press 200mA button
to select 200mA measurement range. Insert the red
test lead into the 200mA MAX terminal and black
test lead into the COM terminal.
It is invalid to press down both 2mA and 200mA
button together.\
3. Connect the test lead in serial with the object being
measured. The measured value shows on the
primary display.
4. The ACI effective measurement reading is only
a p p l i c a b l e t o t h e r a n g e o f 1 0 % ~ 1 0 0 % .
5. In the DCI measurement mode, the secondary display
indicates the range.
6. In the ACI measurement mode, the secondary display
indicates the frequency value of the measured signal.
7. To measure AC current with DC deviation, first press
ACI button, then press AC+DC button. Otherwise,
the primary display shows "--Err 1-", then back to
the present measurement range.
Note
l
If the value of current to be measured is unknown,
use the maximum measurement position, and reduce
the range step by step until a satisfactory reading is
obtained.
l
For safety sake, each measurement time of high
current (>5A) should be less than 10 seconds and
the interval time between 2 measurements should
be greater than 15 minutes.
l
When the input of AC current measurement is open
circuit, it is allowed to have less than 500 digits of
reading which does not affect the accuracy.
l
The AC current True RMS measurement takes a
longer time to stablize, and the Meter requires to
measure the frequency of AC current. Therefore it
is normal to take a longer time to obtain a stable
reading when changing from one reading to a relatively
large reading.
When current measurement has been completed,
disconnect the connection between the testing leads
and the circuit under test, and remove the testing
leads away from the input terminals of the Meter.
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