6. Multimeter recorder (See "Multimeter Recorder" on page 113).
7. The reference value of the relative measurement.
8. AC or DC when measuring current or voltage.
Making Multimeter Measurements
Measuring AC or DC Current
(1) Insert the current measurement module attached to the instrument into the
COM terminal and input terminal on the back of the oscilloscope .
(2) 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).
(3) Connect the black test lead to the module jack corresponding to the ter
minal on the back of the oscilloscope. Connect the red test lead to the module
jack corresponding to the terminal on the back of the oscilloscope.
(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 the red test lead to the terminal.
(3) Probe the test points and read the display.
(4) Press the SET key at the bottom of the screen, select the voltage range as mV
or V, and read the displayed value in the menu.
Measuring Resistance
(1) Push DMM button on the front panel. Select in the bottom menu, select
R.
(2) Connect the black test lead to the COM terminal on the back of the
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