OUMAN EH-201/L, User Manual

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OUMAN EH-201/L Measurement 3: Wind/ Sun meas. OUMAN EH-201/L
Supply water
Wind compensation
6 14 20
m/s
10 V 0 V
30% 70% 100%
min.compens. limit max.compens. limit
Compensation area calculation
°C
Picture. Wind compensated supply water temperature curve.
Wind sensor meas. area
Example: A wind sensor is in use which has a measurement area of
0...20 m/s. You want wind compensation to begin when the wind
velocity is 6 m/s (min. limit) and compensation to be at maximum
value when the wind velocity is at least 14 m/s (max. limit). Calculate
how many percent the wind compensation limits (min. limit and max.
limit) are from the measurement area' s maximum (=20 m/s), and set
them as the minimum and maximum compensation percents.
Comp/Meas. Data
Min / 30%
Max / 70%
Ouman EH-201/L
Measurement
3
0 - 20 mA
(4 - 20 mA)
Wind and sun
meas. transmitter
250
Add
shunt
resistor
1 k
Add series
and
shunt
resistor
1 k
Wind or sun sensor connection:
x 100% = x 100% = 30%
Min.limit
meas. area's max.
6 m/s
20 m/s
Max limit
meas. area`s max.
14 m/s
20 m/s
Min. compens.=
Max.compens.= x 100% = x 100% = 70%
If measurement sensors that begin from zero are in use, (0...10V or
0...20mA) set the values calculated with the above formula as the
minimum and maximum compensation percents.
Setting the min. and maximum compens. when the sensor's measurem. area does not begin at zero.
1. Calculate the compensation percents with the "min. compens." and
"max. compens." formula.
2. See which values should be set for the regulator from the
equivalency table.
0 - 10 V
(2 - 10 V)
Wind and sun
meas. transmitter
Ouman EH-201/L
Measurement
3
2-10V
4 -20 mA
28 %
36 %
44 %
52 %
60 %
68 %
76 %
84 %
92 %
100 %
Value obtained
from the formula
10 %
20 %
30 %
40 %
50 %
60 %
70 %
80 %
90 %
100 %
When you connect the wind or sun sensor to measurement 3,
you instruct the regulator when you want the wind or sun compens.
to function. Calculate compensation limits (min/max) in the same way
regardless of which sensor is in use.
The wind and sun compensation ratio indicates how many degrees
compensation changes the supply water temperature and the user can
set this. (See settings p. 6-7).
The wind and sun sensor measurement signal can be 0...10 V, 2...10 V,
0...20mA or 4...20 mA. Adjust the sensors with the regulator's resistors
so that the measurement message that comes from the regulator is
always 0...5 V.
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