Omega RD-MV100 Series, User Manual

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1-2
1.2 Functions of the Input Section
Number of Measurement Channels/Scan Interval
The number of measurement channels and scan intervals for different models are listed
in the table below. For the procedure related to setting the scan interval, see section 5.9.
Model Number of Measurement Channels Scan Interval
RD-MV102 2 channels 125 ms or 250 ms
RD-MV104 4 channels 125 ms or 250 ms
RD-MV106 6 channels 1 s or 2 s
RD-MV112 12 channels 1 s or 2 s
Input Type and Computation
You can select the input type of a measurement channel from DC voltage, thermocouple,
resistance temperature detector (RTD), and ON/OFF input (contact signal or voltage
signal). You can also perform computation on the measured data such as the
“difference,” “square root,” and “scaling.”
The input type and computation are configured as an “input mode” on the RD-MV100.
For the procedure related to setting the different modes, see sections 5.1 to 5.7.
Input Mode Notation*
1
Description
DC voltage Volt Measures a DC voltage in the range
±
20 mV to
±
20 V.
Thermocouple TC Measures the temperature corresponding to the appropriate
range for R, S, B, K, E, J, T, N, W, L, and U.
Resistance RTD Measures the temperature corresponding to the appropriate
temperature range for Pt100, JPt100, Cu10*
2
, and CU25*
2
.
detector
ON/OFF input
DI Displays the contact input or voltage input signals by
correlating them to 0% or 100% of the display range.
Contact input: Closed contact is ON (1). Open contact is
OFF (0).
Voltage input: Less than 2.4 V is OFF (0). Greater than or
equal to 2.4 V is ON (1)
Difference Delta When the input type*
3
is set to “DC voltage,” “thermocouple,”
“RTD,” or “ON/OFF input,” the value obtained by subtracting
the measured value of another channel (this channel is
called a “reference channel”) from the input signal of the
channel set to compute the difference is displayed as the
measured value of that channel.
Square root Sqrt When the input type*
3
is set to “DC voltage,” the square root
of the input signal of the channel set to compute the square
root is displayed as the measured value of that channel.
The computed result can be scaled to a value in the
appropriate unit and displayed.
Scaling Scale When the input type*
3
is set to “DC voltage,” “thermocouple,”
“RTD,” or “ON/OFF input,” the input signal can be converted
to a value in the appropriate unit desired and displayed.
Skip Skip Channels that are not measured. They are not displayed.
*1 Notation used by the RD-MV100 to represent the input modes. It is used when setting the
measurement channels.
*2 This is optional.
*3 This item defines the type of signals that can be connected to the input terminal when the
input mode is set to “Difference,” “Square root,” or “Scaling.” The description of the input
types, “DC voltage,” “Thermocouple,” “Resistive temperature detector,” and “ON/OFF input,”
are the same as the descriptions given for the input modes, “DC voltage,” “Thermocouple,”
“Resistive temperature detector,” and “ON/OFF input,” respectively.