Promax OD-610 User Manual page 29

To measure current by probing the voltage drop across a resistor
►
Take the Channel 1 as an example, if you are measuring current by probing
the voltage drop across a 1Ω resistor, the operation steps are shown as
follows:
Press the CH1 MENU button to show CH1 SETUP menu.
Press the H3 menu selection, the Probe menu will display at the right of
the screen. Press the F2 button to set MeasCurr to YES, the A/V radio
menu will appear below. Press the F3 button; turn the M knob to set
the Amps/Volts ratio. Amps/Volts ratio = 1/Resistor value. Here the A/V
radio should be set to 1.
The Figure 19 illustrates the setting and the vertical scale factor when
measuring current by probing the voltage drop across a 1Ω resistor.
Figure 19. Regulation of the Attenuation Ratio of the Probe.
To invert a waveform
►
Waveform inverted: the displayed signal is turned 180 degrees against the
phase of the earth potential.
Taking the Channel 1 for example, the operation steps are shown as
follows:
Press the CH1 MENU button and call out the CH1 SETUP menu.
Press the H2 menu selection button and select ON for Inverted item.
The waveform is inverted as it is shown in Figure 20.
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Page June 2017