Yokogawa PC-Based MX100 - Manual (Page 41)

2-27
IM MX180-01E
Integrat
on Mon
tor
3
2
1
4
5
App
Index
Settng the Burnout
When the input mode is set to TC, you can set the burnout detection behavior. 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.
Intal Balancng of Stran Input Channels (Intal Unbalance Value
Adjustment)
When configuring a bridge circuit with a strain gauge, the bridge circuit will not
necessarily be balanced even if the strain of the circuit under test is zero due to the slight
deviation in resistance of the strain gauge, and the measured value may not be zero (the
value in such cases is called the initial unbalanced value).
Therefore, when taking measurements you must first balance the bridge and, if the strain
is zero, obtain a measured value of zero. This is called initial balancing. (setting the initial
unbalanced value to zero).
Measured value
Strain
Initial unbalanced value
Reset
Initial balance
0
With the MX100, initial balancing is performed in the ±10000µ strain range.
Initial balance: The value when the command is executed is set as the initial
unbalanced value, and the measured value is set to zero.
Reset: The value set during initial balancing is reset to zero. The initial
unbalanced value is used as-is for the measured value.
Note
If the measuring range is changed, the initial balancing is reset.
After a range change, you must redo initial balancing.
2.4 Settng the Measurement Condtons (Settng the Measurement Channels)