Rev. 02-19 Page 17
USER MANUAL
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[S9=1] PROPORTIONAL functioning with 4-20mA ambient humidity probe
(INTEGRATED HUMIDISTAT):
This type of operation involves proportional steam production; the humidifier will automatically
regulate the steam production according to the request in the environment depending to the set
point. The consent is provided by a humidity probe at 4-20mA (0-100% RH) that, in addition to
regulating steam production, allows to show the relative humidity of the environment directly
on the humidifier display. Set the second level variable
S9=1
and connect the signal 4-20mA of
the humidity probe to clamps
14
and
15
; in particular, connect the RH signal to clamp
14
, and
cV to clamp
15
.
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-
-
The Bp proportional band is the percentage value of humidity around the set point; the
humidifier works proportionally within this value. Example: if the proportional band is set on
default value 10% (±5% set point value) and humidity is set at 50%, below 45% the humidifier
will work at 100% of steam production; above 55%, the humidifier will not produce steam.
Between 45% and 55%, the humidifier will optimally regulate steam production.
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[S9=2] PROPORTIONAL functioning with 0-10Vdc reference signal:
This type of operation involves the production of steam proportionally to the reference signal
0-10Vdc. Example: a reference signal of 6Vdc will allow the humidifier to produce 60% of
steam production referred to the software variable Pr. So if Pr = 70%, steam production will be
42%. Set the second level variable
S9=2
and connect the signal of reference 0-10V to clamps
16
and
17
; in particular, connect VRH (0-10Vdc probe output) to clamp 16 and GND mass to
clamp
17
.
RH% Ambient
humidity probe
Steam production request
External reference
signal 0-10V
Enabling
GND
VRH
Enabling
RH% Ambient umidity
probe (4-20mA)
RH
+V
External reference signal
0-10V
Steam production request
