A&D RA3100 Omniace, Instruction Manual

Page: 39 / 176

4.Configuring Measurement - 4.2.Setup the Input Channel
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4.2.2. Setup the input channels
The input waveform is displayed on the monitor when a signal is connected to the input module.
The overall procedure for setting the input channel is indicated below. See the following for details on
each step.
Step 1. Set coupling. (When the input module is a voltage module)
Step 2. Set the measurement range according to the target for measurement.
Step 3. Set the input filter.
Step 4. Set the display range and display position.
Step 5. Set the display minimum and display maximum.
Step 6. Execute zero adjust.
Description of Step 1 (setting coupling)
Select the input coupling using the Coupling key in the channel setup sub menu.
Tap the Coupling
key and turn the rotary knob to change the setting in the order DC → GND → AC.
Coupling Contents
DC Enables measurement of the actual input signal, including the DC and AC component.
AC
Measures the AC component of the input signal only. Set this when you want to measure
only the amplitude of an AC signal, as it cancels the DC offset of the signal.
GND
Connects the channel input to GND without connecting the input signal inside the channel.
Enables the input GND level to be checked with waveform monitoring or printer recording.
Description of Step 2 (setting the measurement range)
The input sensitivity can be changed in Meas. range in the channel setup sub menu.
The value displayed for the measurement range (RANGE) indicates the input (measurement) maximum
value and corresponds to 10 div on the waveform monitor. When the display position is 50%, the full
measurement range of ±RANGE (20 div) is displayed.
When the Meas. range key is tapped in the channel setup sub menu, the border turns orange, the
area around the rotary knob turns blue, and the rotary knob can be changed.
Turn the rotary knob counterclockwise to reduce the sensitivity and clockwise to increase the sensitivity.
The setting values of the measurement range differ according to the type of input module.
When the input exceeds the measurement range, [OVER RANGE] is displayed on the bottom right of
the screen, and the main unit emits a warning beep. Reduce the sensitivity with the measurement range
so that the input signal does not exceed the range.
Beep beep! Beep beep!
OVER RANGE