Specifications

Model UT90B: OPERATING MANUAL
12
capacitors.
z The test leads can add 0.1Ωto 0.2Ω of error
to resistance measurement. To obtain
precision readings in low-resistance
measurement, that is the range of 200.0Ω,
short-circuit the input terminals beforehand
and record the reading obtained (called this
reading as X). (X) is the additional
resistance from the test lead.
Then use the equation:
measured resistance value (Y)  (X) =
precision readings of resistance.
z When the resistance reading≥0.5Ωin the
shorten-circuit, please check for loose test
leads or other reasons.
z For high-resistance measurement (>1MΩ),
it is normal taking several seconds to
obtain a stable reading, and it is better to
choose short measuring cable.
z When resistance measurement has been
completed, disconnect the connection
between the testing leads and the circuit
under test.
D. Diodes Measurement (see figure 6)
Warning
To avoid injury to the user, please do not
attempt the voltage higher than 60V/DC or
30V/AC.
Use the diode test to check diodes, transistors,
and other semiconductor devices. The diode test
sends a current through the semiconductor