Mastech MS8361D, Руководство пользователя

Страница: 12 / 14

4.6 Capacitance measurement
•
Turn off the power to the circuit. Allow all capacitors to
discharge.
•
Set the rotary switch to the multi-function position. Press
“ FUNC ” three times to ativate capacitance test.
•
Connect the black and red test leads to the COM and
terminals respectively (or you can measure the capacitan-
ce by using the special multi-function socket).
•
Connect the test leads to the capacitor being measured
and read the displayed value.
Some tips for measuring capacitance:
•
The meter may take a few seconds to stabilize reading.
This is normal for for high capacitance measuring.
•
To improve the accurancy of measurements less than
10nF, subtract the residual capacitance of the meter and
leads.
WARNING
To avoid eletrical shock and/or damage to the instrument,
disconnect circuit power and discharge all high-voltage
capacitors before measuring capacitance. Use the DC voltage
function to confirm that the capacitor is discharged.
4.7 Transistor measurement
•
Set the rotary switch to hFE range.
•
Connect the “ COM ” plug and “ + ” plug of the special
multi-function socket to the COM and hFE terminals.
•
Determine whether the transistor to be tested is NPN
or PNP type and locate the Emitter, Base and Collector
leads.
•
Insert leads of the transistor into proper holes of the
special multi-function socket.
WARNING
To avoid eletrical shock and/or damage to the instrument, do
not apply more than 36Vdc or 36Vac rms between the hFE
terminal and the COM terminal.
4.8 Frequency measurement
•
Set the rotary switch to Hz% range.
•
Connect the black and red leads to the COM and Hz
terminals respectively.
•
Connect the test leads to the circuit being measured.
•
Read the displayed value.
WARNING
Do not measure frequency on high voltage (>250V) to avoid
electrical shock hazard and/or damage to the instrument.
4.9 Non-contact voltage(NCV) measurement
•
Set the rotary switch to the NCV position.
•
Move the top of the meter toward the voltage source. If
•
The meter will show the approx.
voltage is detected (>100V AC), the meter will beep
and the
NCV indicator will flash. The closer to the
voltage soursce the meter is, the faster the meter will
beep/flash.
Note:
- Even without indication, voltage may still present. Do not
reply solely on
NCV detection to determine the presence
of voltage. Detection could be impaired by socket design,
insolation thickness, or other factors.
- External interference sources could mistakenly trigger
19 20