GW Instek GCM-407, Руководство пользователя

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3. DC Voltage Measurement (See Figure 5)
1) Insert the red test lead into the “V” input jack and
the black test lead into the “COM” jack.
2) Rotate the function dial to the DC voltage
measurement mode and connect the test leads in
parallel to the load to be measured.
3) Directly read the measured voltage from the
display.
Note:
• Do not input voltages greater than 1000V DC.
Measuring voltage greater than 1000V DC may
damage the meter.
• Be aware that higher voltages can cause electric
shock.
• After all measurement operations are completed,
disconnect the test leads from the EUT.
• When the measured voltage is greater than the
safety voltage of 30VDC, the LCD will display a
high voltage warning prompt, “ ”. When voltages
greater than DC 1000V range are input, the
meter warning prompt, “ ”, will flash and the
meter will automatically buzz intermittently.
4. Resistance Measurement (See Figure 6)
1) Insert the red test lead into the “Ω” input jack and
the black test lead into the “COM” jack.
2) Rotate the function dial to the “Ω” measurement
mode. Press the SELECT key to select resistance
measurement, “Ω”, and connect the test leads in
parallel to the resistance to be measured.
3) Directly read the measured resistance from the
display.
GCM-407 User Manual GCM-407 User Manual
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Note:
• If the open circuit resistance or the resistance
being measured exceeds the maximum range of
the meter, the display will show “OL”.
• When measuring at the 600mV range, the REL
function (relative measurement function) must
be used to obtain a precise measurement
reading; To use the REL function, short the test
leads and press the REL key to obtain a
reference value. The displayed resistance value
will now be equal to the measured resistance
minus the reference value.