Yokogawa Data Acquisition with PID Control CX2000 - Manual (Page 249)

7-3
IM 04L31A01-01E
Measurement Function Related Setup Operations
7
• First-CH/Last-CH
Select the range of channels for setting the burnout and RJC.
• Burnout set
Set the burnout action for the measurement inputs. Select [Off], [Up], or [Down] (initial
value is Off). This setting is valid only for thermocouple inputs.
Off:
Burnout action Off
Up: When the thermocouple burns out, the measured result is set to positive
overflow “+*****.”
Down: When the thermocouple burns out, the measured result is set to negative
overflow “–*****.”
• RJC
This is the reference junction compensation setting for thermocouple inputs. Select
either [Internal] or [External] (initial value is Internal). This setting is valid only for
thermocouple inputs.
Internal: Uses the reference junction compensation function of the CX2000.
External: Uses the external reference junction compensation function.
If set to [External], a box for entering the reference junction compensation voltage that
is to be added to the input appears. Set the value in the range of [–20000] µ V to
[20000] µ V (initial value is 0 µ V).
Setting the Range
• First-CH/Last-CH
Select the range of measurement channels for setting the range. On models with 10
measurement inputs, select from [01] to [10]; on models with 20 measurement inputs,
select from [01] to [20].
• Range
First, select the input mode in the [Mode] entry box from [Volt], [TC], [RTD], [DI],
[Delta], [Sqrt], and [Scale]. Then, set other parameters such as [Range], [Span
Lower/Upper] according to the selected input mode as described below. Set [Skip] for
channels that are not to perform measurements or displays.
• When set to [Volt] input
Range Selectable Measurement Span Range
20mV –20.00 to 20.00 mV
60mV –60.00 to 60.00 mV
200mV –200.0 to 200.0 mV
2V –2.000 to 2.000 V
6V –6.000 to 6.000 V
20V –20.00 to 20.00 V
50V –50.00 to 50.00 V
Note
For current inputs, a shunt resistor is attached to the input terminal to convert the signal to
voltage input. The following table shows the available shunt resistors. For example, a 250-Ω
shunt resistor is used to convert the signal in the range of 1 to 5 V for 4-20 mA input.
Name Model Resistance
Shunt resistor 4159 20 250 Ω ± 0.1%
(for screw terminals) 4159 21 100 Ω ± 0.1%
4159 22 10 Ω ± 0.1%
7.1 Settings Related to Measurement Inputs