UNI-T UT105 Operating Manual page 42

Model UT105: OPERATING MANUAL
Measurement Operation(26)
(4) Connect the red test lead probe of the meter to the
signal terminal (i.e. hot end) of the sensor.
If the sensor has more than 3 leads, what is used in the
automobile is a heat oxygen sensor, which has 2 hot
ends. Refer the positions of the hot ends in various
kinds of automotive manuals.
At this time, connect the red and black test lead probes
respectively to these two hot ends. Compare the readings
with the specifications in the operation manual provided
by the manufacturer.
The zirconia sensor is tested with the 2VDC. As
prompted at the LCD connect terminal, insert the red
test lead into the V terminal and insert the black test
lead into the COM terminal.
The titania sensor is tested with the 200k . As prompted
at the LCD connect terminal, insert the red test lead into
the terminal and insert the black test lead into the COM
terminal.
Secure the sensor with a table vice, light up the propane
burner and add a heat sensor terminal. Make its
temperature about 660
the sensor, when the readings can be obtained:
The zirconia sensor has a voltage of 0.6 V or more.
The titania sensor has a resistance of about 1 .
Move the burner away for heating, when the reading
can be obtained:
The zirconia sensor has a voltage of 0.4 V or more.
The titania sensor has a resistance of about 4 k .
Warning:
l In testing, the readings will vary with the heating
temperatures.
o
F and exhaust the oxygen from
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