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1)
Normal integration
Integration value is reset at every reference time and interval.
Entering a formula
ITG(X)
X: Channel No. of integration target
Calculation detail
D
n
= D
n-1
+
{(PV
n
+ PV
n-1
) x (T
n
－
T
n-1
)}
÷
2
D
n
: Integration result
D
n-1
: Last integration result
PV
n
: Integration target data
PV
n-1
: Last integration target data
T
n
: Calculation time
T
n-1
: Last calculation time
If error data (±OVER, etc.) is included, calculation will not be performed and the last result will be valid.
2)
24-hour integration
Integration value is reset only at reference time(start time).
Entering a formula
ITG24(X)
X: Channel No. of integration target
Calculation detail is the same as normal integration.
3. F value
Entering a formula
FV(X#To#Z#R)
X: Channel No. of calculation target, To: Reference temperature for F value calculation, Z: Z value, R: Start
temperature for F value calculation
F value is obtained from the following calculation.
∫10
A
dt where A = (T - To)
÷
Z
T: Calculation target channel data
When T value exceeds R value, F value will be reset to 0.
4. Relative humidity
Entering a formula
RH(D#W)
D: Channel No. of dry bulb temperature, W: Channel No. of wet bulb temperature
Relative humidity is obtained from the following formula.
((B - 0.000662 x 1013.0 x (Ddata
– Wdata))
÷
A) x 100
A: Dry bulb saturated water vapor pressure, B: Wet bulb saturated water vapor pressure, Ddata: Dry bulb
temperature, Wdata: Wet bulb temperature
The following formula is used to obtain a value of saturated water vapor pressure.
6.1121 x EXP ((17.502 x T)
÷
(240.9 + T))
T: Temperature
