Yokogawa PC-Based MX100 - Manual (Page 18)

1-9
IM MX100-01E
Explanation of Functions
3
2
1
4
5
Index
Filters
The main module is equipped with a first-order lag filter (see section 2.7, “Measures
against Noise on the MX100”. You can select a time constant (time until 63.2% of the
output value is reached) corresponding to the measurement interval indicated in the
equation below.
Time constant = measurement interval × N (where N = 5, 10, 20, 25, 40, 50, or 100)
Computation
Difference computation between channels and linear scaling are possible. Linear scaling
converts the measured values to values suitable for a particular purpose (scaled values)
using the following equation.
Scale value =
(X – SP
min
) × (SC
max
– SC
min
)
SP
max
– SP
min
+ SC
min
X: Measured value
SP
max
: Specified span maximum
SP
min
: Specified span minimum
SC
max
: Specified scale maximum
SC
min
: Specified scale minimum
Remote RJC (RRJC)
In measuring temperature with thermocouples within the same unit, when the item to be
measured is located at a great distance, you can setup relay terminals near the item,
measure the temperature of the relay terminal section using thermocouples (reference
channel), and use the resultant value as the reference junction compensation value for
the temperature measurement. By connecting a copper wire between the relay terminal
and input terminal of the input module, and a thermocouple between the DUT and relay
terminal, you can measure the temperature of the DUT without the need for a large
amount of expensive thermocouples.
MX100
Thermocouple*
Copper wire
Copper wire
Thermocouple*
Thermocouple*
Relay terminal (to be furnished by the user)
Reference channel
Input terminal
* Use the same type of thermocouples.
1.2 Main Module Functions