13-16
2. 24-hour totalizing operation
The totalized values are reset only at totalizer reset reference time.
Entering method of the formula
ITG24(d)
d: Channel number to be totalized
The calculation contents are same as the standard totalizing operation.
2) F-value
Entering method of the formula
FV(X
#
To
#
Z
#
R)
X: Channel to be calculated, To: F-value calculation reference temperature, Z: Z-value,
R: F-value calculation starting temperature
The following formula is used for the F-value calculation
∫10
A
dt Provision: A=(T-To)÷Z
T: Channel data to be calculated
When T exceeds R, F-value is reset to 0.
3) Relative humidity
Entering method of the formula
RH(D
#
W)
D
: Dry bulb temperature, W: Wet bulb temperature
The following formula is used for the relative humidity calculation
((B-0.000662×1013.0×(D-W))÷A)×100
Provision: A: Dry bulb saturated water vapor pressure, B: Wet bulb saturated water vapor pressure
The following formula is used for the calculation of the saturated water vapor pressure.
6.1121
×EXP
((17.502
×T
)
÷
(240.9
+T
))
T: Temperature
4) Dew-point temperature
Entering method of the formula
DEW(T
#
H)
T: Temperature data channel, H: Relative humidity channel
The following formula is used for the dew-point temperature
t: Temperature data
h: Relative humidity data
D: Dew-point temperature
①
K=t+273.15 K=t+273.15
②
In case of t
≧0 t≧0
W=EXP(-5800.2206/K+1.3914993+K×(-0.048640239+K×(0.41764768E-4
-0.14452093E-7×K))+6.5459673×LOG(K))/1000
In case of
t<0
W=EXP(-5674.5359/K+6.3925247+K×(-9.677843E-3+K×(0.62215701E-6
+K×(0.20747825E-8-9.484024E-13×K)))+4.1635019×LOG(K))/1000
③
S=W×h/100
④
P=S×1000
⑤
Y=LOG(P)
⑥
In case of
P≧611.2
D= -77.199+Y×(13.198+Y×(-0.63772+0.071098×Y))
In case of
P<611.2
D=
-
60.662
+Y×(
7.4624
+Y×(
0.20594
+
0.016321
×Y))
Содержание LE5100
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