Measuring Resistance - KNOVA KN 8058 Manual Del Usuario

Measurement Operation
When the testing leads are connected to the current
terminals, do not parallel them across any circuit.
To measure current, do the following:
1. Insert the red test lead into the μmA or A input
terminal and the black test lead into the COM
terminal.
2. Set the rotary switch to μA, mA, or A.
3. The Meter defaults to DC current measurement
mode. To toggle between DC and AC current
measurement function, press BLUE button.
4. Connect the test lead in serial to the return
circuit to be tested. The measured value shows
on the display.
Select
figure 3
5. Press Hz% to obtain the frequency and duty
cycle value.
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Input Amplitude: (DC electric level is zero)
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Input Amplitude:
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Frequency response:
Note
• 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.
• For safety sake, each measurement time for
>5A current should be less than 10 seconds and
the interval time between 2 measurements should
be greater than 15 minutes.
• 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.
range 30%
400Hz
C. Measuring Resistance (See figure 4)
Select
figure 4
WARNING
To avoid damages to the Meter or to the
devices under test, disconnect circuit power and
discharge all the high-voltage capacitors before

measuring resistance.

To avoid harm to yourself, do not input higher than
DC 60V or AC 30V voltages.
To measure resistance, connect the Meter as
follows:
1. Insert the red test lead into the Ω terminal and
the black test lead into the COM terminal.
2. Set the rotary switch to Ω resistance
measurement (Ω) is default or press BLUE
button to select Ω measurement mode.
3. Connect the test leads across with the object
being measured. If there is lead on the resistor
or SMT resistor, it is more convenience to use
the included multipurpose socket to carry out
testing.The measured value shows on the
display.
Note
• The test leads can add 0.2Ω to 0.5Ω of error to
resistance measurement. To obtain precision
readings in low-resistance measurement,
short-circuit the input terminals beforehand,
using the relative measurement function button
REL to automatically subtract the value
measured when the testing leads are
short-circuited from the reading.
• If Ω reading with shorted test leads is not
check for loose test leads or other reasons.
• For high-resistance measurement (>1MΩ), it is
normal to take several seconds to obtain a
stable reading. To obtain stable reading, use
test lead as short as possible or use the included
multi-purpose socket tp carry out measurement.
4
0.5Ω,