Yokogawa PC-Based MX100 - Manual (Page 43)

2-29
IM MX180-01E
Integrat
on Mon
tor
3
2
1
4
5
App
Index
Generally, the range is as follows.
Using the symbols that have appeared in the explanation thus far, after setting the scale
maximum and minimum, the values are as follows.
Span minimum = [(K(mV/V) × 2000) / Y(unit)] × Smin (µSTR)
Span maximum = [(K(mV/V) × 2000) / Y(unit)] × Smax (µSTR)
When Lsted at the Calbraton Coeffcent
An example is given with a displacement gauge.
• Rated input
20 mm
• Calibration coefficient 0.003998 mm / (1 µV/V)
Basically, if you can convert the calibration coefficient to the rated output mentioned in
“When Rated Input and Rated Output Are Listed,” the following is a calculation following
the explanation in “When Rated Input and Rated Output Are Given.”
Using equation 1,
1mV/V = 0.001mV/V = 0.001 × 2000 µSTR = 2 µSTR
therefore the rated output with this sensor when 20 mm is input would be
20 mm ÷ 0.003998 mm / 2 µSTR] = 10005 µSTR
In other words, for each 1 mm, an output of
10005 µSTR / 20mm = 500.25 µSTR/mm
can be obtained.
Thereafter in the same manner, if you wish to measure with a scale of 2 mm to 15 mm,
the settings are:
Scale minimum: 2
Scale maximum: 15 (units: mm)
therefore,
Span minimum: 2 × 500.25 µSTR/mm = 1000.5 µSTR
Span maximum: 15 × 500.25 µSTR/mm = 7503.75 µSTR
...would be appropriate settings.
The measuring range becomes 20000 µSTR, making the resolution on the MX100 1
µSTR, therefore we can round as follows.
Span minimum: 1001 µSTR
Span maximum: 7504 µSTR
2.4 Settng the Measurement Condtons (Settng the Measurement Channels)