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6.Use the Multimeter (Optional)
5. Data hold mode is enabled.
6. Multimeter recorder (See "Multimeter Recorder" on page 111).
7. The reference value of the relative measurement.
8. Range of measuring current: mA or 10A.
9. AC or DC when measuring current or voltage.
Making Multimeter Measurements
Measuring AC or DC Current
To measure a AC or DC current which is less than 400 mA, do the following:
(1) Push DMM button on the front panel. Select Current in the bottom menu, select it
again to switch between ACA (AC current ) or DCA (DC current).
(2) Select Configure in the bottom menu, select Current as mA in the right menu.
(3) Connect the black test lead to the COM terminal on the back of the oscilloscope.
Connect the red test lead to the mA terminal.
(4) Turn off the power of the measured circuit. Discharge all high- voltage capacitors.
(5) Disconnect the circuit path to be tested. Connect the black test lead to one side of the
circuit (with a lower voltage); connect the red test lead to the other side (with a higher
voltage). Reversing the leads will produce a negative reading, but will not damage the
multimeter.
(6) Turn on the power of the measured circuit, and read the display.
(7) Turn off the power of the measured circuit and discharge all high-voltage capacitors.
Remove the test leads and restore the circuit to the original condition.
To measure a AC or DC current which is 400 mA to 10 A, do the following:
(1) Push DMM button on the front panel. Select Current in the bottom menu, select it
again to switch between ACA (AC current ) or DCA (DC current).
(2) Select Configure in the bottom menu, select Current as 10A in the right menu.
(3) Connect the black test lead to the COM terminal on the back of the oscilloscope.
Connect the red test lead to the 10A terminal.
(4) Turn off the power of the measured circuit. Discharge all high- voltage capacitors.
(5) Disconnect the circuit path to be tested. Connect the black test lead to one side of the
circuit (with a lower voltage); connect the red test lead to the other side (with a higher
voltage). Reversing the leads will produce a negative reading, but will not damage the
multimeter.
(6) Turn on the power of the measured circuit, and read the display.
(7) Turn off the power of the measured circuit and discharge all high-voltage capacitors.
Remove the test leads and restore the circuit to the original condition.
Measuring AC or DC Voltage
(1) Push DMM button on the front panel. Select Current in the bottom menu, select it
again to switch between ACA (AC current ) or DCA (DC current).
(2) Connect the black test lead to the COM terminal on the back of the oscilloscope and
109
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