Yokogawa Data Acquisition with PID Control CX2000 - Manual (Page 23)

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M-4659
Configuring the DX1000/DX2000
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Index
Input Type (Mode and Range/Type)
Correspondence between difference computation, scaling, and square root computation
([DELTA], [SCALE], and [SQRT]) is as follows.
Mode OFF DELTA SCALE SQRT
SKIP Yes No No No
VOLT (voltage) Yes Yes Yes Yes
TC (thermocouple) Yes Yes Yes No
RTD (resistance temperature detector) Yes Yes Yes No
DI (voltage level/contact input) Yes Yes Yes No
1-5 V No No Yes No
The list for range/type changes depending on the above settings.
Span L, Span U
Input range. The selectable range is displayed on the screen.
Note
• You cannot set the same value to [Span L] and [Span U].
• When the [Mode] is [1-5V] or [Sqrt], [Span L] must be less than [Span U].
Linear Scaling (SCALE)
Converts the unit to obtain the measured value.
• Scale L, Scale U
Input range after converting the unit. The selectable range is from –30000 to 30000.
• Point
Set the number of digits to the right the decimal to four digits or less (0 to 4).
Note
• The DX converts the measured value to a value obtained by removing the decimal point
from the value span specified by [Scale L] and [Scale U]. For example, if the scale setting is
“–5 to 5,” the value is converted to a value within the span of “10”; if the scale setting is “–5.0
to 5.0,” the value is converted to a value within a span of “100.” In this case, the resolution
of the value converted to a span of “10” is lower than the value converted to a span of “100.”
To prevent the display from becoming rough, it is recommended that the scale be set so that
this value is greater than 100.
• You cannot set the same value to [Scale L and [Scale U].
• When the [Mode] is [1-5V] or [Sqrt], [Scale L] must be less than [Scale U].
Difference Computation (DELTA)
Displays the difference between the input and the reference channel.
If difference computation is performed between channels that have different range and
type settings, the decimal position of the computed result is set to that of the channel
computing the difference. If the number of digits to the right of the decimal of the
reference channel is greater than that of the channel computing the difference, the
reference value below the least significant digit of the channel computing difference is
rounded beforehand.
Ref. CH
The reference channel for difference computation.
Square Root
Computes and displays the square root of the input. This setting can be used only when
the input mode is set to VOLT (voltage). As necessary, set the span, scale, and unit.
Unit
Enter the unit using up to six characters.
3.3 Setting the Measurement Channels, Ext. Channels