Specifications

Model UT90B: OPERATING MANUAL
15
Note
z To measure online capacity, please turn off
power of the circuit and discharge all
capacitors.
z Open-circuit voltage of continuity
measurement is about 3V.
z When continuity testing has been
completed, disconnect the connection
between the testing leads and the circuit
under test.
F. Built-in Power Deficiency Charge (see
figure 8)
Warning
To avoid damage to the Meter, please do not
attempt changeover the rotary range during
charge.
The ways of charge as follows:
1. 220 V
Power charge.
Insert the red test lead into the VΩ
terminal and the black test lead into the
COM terminal, set the rotary range to 230
V
MAX position, then insert the test
leads into the 220 V
Power plug to start
the charge.
2. 9-12
low voltage power charge.
Insert the red test lead into the VΩ
terminal and the black test lead into the
COM terminal, set the rotary range to 9-
12
position, then insert the test leads