Yokogawa DAQWORX - Manual (Page 52)

2-22 IM WX103-01E
• The reference channel is a measurement channel (channel existing on the
measurement channel page) with the Monitor check box selected.
• The range of the reference channel and that of the corresponding measurement
channel are the same.
• The channel is in the same unit (MX100).
Settng the Tme Constant of the Frst-Order Lag Flter (Vald Only When
the Input Mode Is Set to Somethng Other than DI)
A first-order lag filter is available. Select from the Filter list box, the time constant N (time
until 63.2% of the output value is reached) for the case when the measurement interval
(Monitor interval in the settings) is set to 1 s. Time constants when the measurement
interval is set to a value other than 1 s follow the equation below.
Time constant = measurement interval × N (where N = 5, 10, 20, 25, 40, 50, or 100)
The table below lists the relationship.
Measurement Interval (s) Selectable Tme Constants (s)
0.01 0.05 0.1 0.2 0.25 0.4 0.5 1
0.05 0.25 0.5 1 1.25 2 2.5 5
0.1 0.5 1 2 2.5 4 5 10
0.2 1 2 4 5 8 10 20
0.5 2.5 5 10 12.5 20 25 50
1 5 10 20 25 40 50 100
2 10 20 40 50 80 100 200
5 25 50 100 125 200 250 500
10 50 100 200 250 400 500 1000
20 100 200 400 500 800 1000 2000
30 150 300 600 750 1200 1500 3000
60 300 600 1200 1500 2400 3000 6000
Input
63.2% of the output value
Output curve when
the filter is used
Time constant in the table above
Settng the Burnout
When the input mode is set to TC, you can set the burnout detection behavior. (This
setting is possible when the input mode is set to a mode other than DI, but the setting
takes effect only when the mode is TC.) If set to Up, the measured value is fixed to
+OVER when a burnout is detected (condition in which the input signal level exceeds
the upper limit of the measurement range). If set to Down, the measured value is fixed
to – OVER (condition in which the input signal level exceeds the lower limit of the
measurement range). To not detect burnouts, select Off (default).
Settng the RJC
When the input mode is TC, select whether to use the internal reference junction
compensation function of the input module or an external reference junction
compensation function. (This setting is possible when the input mode is set to a mode
other than DI, but the setting takes effect only when the mode is TC.) When using the
external reference junction compensation function, set an appropriate reference junction
compensation voltage (Volt in the setup) in the range of –20000 µV to 20000 µV. For
example, if the reference junction temperature of the external reference compensation is
T
0
°C, set the reference compensation junction voltage to the thermoelectromotive force
of the 0-°C reference of T 0 °C.
2.4 Settng the Measurement Condtons (Measurement Channel Settngs)