Rev. 02-21 Page 15
USER MANUAL
-
[S9=3] PROPORTIONAL functioning with 4-20mA ambient humidity probe + 4-20mA
humidity probe in air duct (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 and to the value measured in duct.
Set the second level variable
S9=3
, connect the 4-20mA signal of ambient humidity probe
(0-100%RH) to clamps
14
and
15
; in particular, connect RH signal to clamp
14
and +V to
clamp
15
. Connect 4-20mA signal of humidity probe in air duct
(0-100%RH) to clamps
20
and
21
; in particular, connect signal RH to clamp
20
and +V to clamp
21
. For further information on
the humidity probe in air duct, refer to chapter 3 “Programming” (variables StC, r0, t1).
-
[S9=4] PROPORTIONAL functioning with 0-10Vdc reference humidity probe in
air duct (4-20mA):
This type of operation involves the production of steam proportionally to the 0-10Vdc reference
signal and to the humidity measured in duct.
Set the second level variable
S9=4
and connect the 0-10Vdc reference signal to clamps
16
and
17
; in particular, connect VRH to clamp
16
and GND mass to clamp
17
. Connect 4-20mA
signal of humidity probe in air duct (0-100%RH) to clamps
20
and
21
; in particular, RH signal
to clamp
20
and +V to clamp
21
.
For further information on the humidity probe in air duct, refer to chapter 3 “Programming”
(variables StC, r0, t1).
Enabling
RH% Ambient humidity
probe (4-20mA)
RH% humidity probe
in air duct (4-20mA)
RH
+V
RH
+V
Enabling
RH% humidity probe
in air duct (4-20mA)
External signal of
reference 0-10V
RH
+V
GND
VRH
