A&D RA3100 Omniace, Instruction Manual

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9.Using Optional Modules - 9.2.Four Channel Voltage Module (RA30-102)
1WMPD4004444 103
(14) Zero adjust: Cancels the input offset of the input channel. Execute zero cancellation to perform more
accurate measurement.
(15) Sheet: Set the monitor display and printing sheet on printer for this set channel.
(16) Available range and current measurement value monitor
9.2.3. Measurement Setup
Check the slot number and channel, connect the signal to the corresponding input module, and enable
Meas. to display the input waveform on the monitor screen. Perform adjustment for the required
signal waveform while viewing the waveform.
Follow the procedure below to set the input channel.
Step 1. Set the input coupling in with the Coupling key (6).
Coupling Contents
DC
Enables measurement of the actual input signal, including the DC and AC component.
Set DC coupling when performing measurement.
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.
Step 2. Set the measurement range according to the target for measurement.
The input sensitivity can be changed with the Meas. range key (7) 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%, ±RANGE (full measurement range) is displayed.
Tap the Meas. range key and turn the rotary knob to change the range. Turn the rotary knob
counterclockwise to reduce the sensitivity and clockwise to increase the sensitivity. The following 8
measurement ranges are available.
200 V 100 V 50 V 20 V 10 V 5 V 2 V 1 V
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.
Step 3. Set the input filter.
Set the low-pass filter with the L.P.F. key (8).
The low-pass filter of this module is a gently sloping attenuation filter that prioritizes the waveform.
Set a cutoff frequency about 10 times the effective frequency as a signal to remove the
unnecessary high frequency component and noise component.
OFF 3 kHz 300 Hz 30 Hz 3 Hz
Step 4. Set the display range and display position.
See the description in "4.2.2. Set the input channels - Display Range and Display Position (Display
Area) ".