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“OL” is displayed if the measured diode is open or the polarity is reversed.
Before measuring on-line diode, please switch off all powers of measured
circuit, and discharge all capacitors completely.
The open-circuit voltage for diode measurement is about 3.0V.
Do not input voltage over 30V (DC/AC) to avoid personal injury.
Disconnect the test lead with measured circuit after all measurement
operations are completed.
7. Capacitance measurement (Figure 8)
1) Set the rotary switch to “ ”, then short press SEL to select capacitance
measurement.
2) Connect red test lead with V terminal, and black with COM. Then connect
test leads with both ends of measured capacitor.
3) Read the measured capacitance from the LCD.
Warning:
It is recommended to measure capacitor below 100nF in REL mode.
“OL” is displayed on the LCD if the measured capacitor is shorted or the
measured capacitance is over the maximum range.
Please discharge capacitor completely before measurement (especially for
capacitor with high voltage) to avoid product damage or personal injury.
Disconnect the test lead with measured circuit after all measurement
operations are completed.
8. Current probe measurement (ACA/DCA) (Figure 9)
1) Connect current probe with V terminal and COM terminal.
2) Set the rotary switch to “ ”, then press SEL to select ACA/DCA
measurement.
3) Read from the LCD the measured current of current probe. Under ACA
mode of current probe, short press SEL to switch to frequency measurement
in ACA mode of current probe, then read from the LCD the frequency of
current.
Warning:
For frequency measurement under ACA mode of current probe, the input
current amplitude shall be greater than 10% of full range.
The frequency response is 45Hz~400Hz. For range at 600.0A: 1mV = 1A
(AC/DC). The current probe measurement is an input mode of analog voltage,
the specified accuracy and frequency response refer to the intrinsic accuracy
and frequency response of UT117C (eliminate the error of current probe).
Disconnect the test lead with measured circuit after all measurement
operations are completed.
9. AC/DC current measurement (Figure 9)
1) Set the rotary switch to “ ”/“ ”.
2) Connect red test lead with A terminal, and black with COM. Then connect
test lead with measured loop in series.
3) Read the measured current from the LCD. The displayed AC current is true
RMS value.
4) When measuring AC current, short press SEL to switch to frequency
measurement under AC current mode, then read from the LCD the frequency
of measured current. For measuring frequency of current, the AC current
amplitude shall be 600mA to 10A; the input amplitude shall be greater than
3A for frequency measurement at range of 10A. If the measured frequency
is unstable, please select low current range manually for a stable readout.
See “Technical Specifications” for details.
5) For frequency detection, analog bar graph and range indicator indicate the
current AC current.
Warning:
When turning the rotary switch to or from “ ”/“ ”, the LCD shows
“LEAd” for about a second as a warning of testing lead.
Please check if the fuse is good before measuring current. The instructions
to check the fuse is as below:
Set the rotary switch to Ω position, then short-circuit V terminal and A
terminal. If the displayed resistance is about 0.0Ω, the fuse is good,
otherwise damaged.
UT117C User Manual
UT117C User Manual
Figure 8
Figure 9
