Ascon Tecnologic - TRH52 - OPERATING INSTRUCTIONS - PAG. 2
3. INSTALLATION WARNINGS
3.1
Mechanical mounting
The device, in an 80 x 80 mm plastic container, is designed
for wall mounting using screws passing through the slotted
holes on the case.
–
Install the instrument as far as possible from electromagnet-
ic sources as motors, power relay, relays, electrovalves, etc.;
–
Avoid to place the probe in places where are present cor-
rosive and polluting gases and to do so that the probe are
installed in a ventilated position;
–
The signal cables of the device must be routed separately
from the power cables.
D
D
Should be necessary to remove the protective cap, do
not cause any mechanical stress to the sensor and
absolutely avoid touching the Humidity sensor surface.
3.2
Dimensions
[mm]
3.2.1
Mechanical dimensions
2.0
79.6
121.8
65.7
79.6
100.0
2x Ø3.2
50.5
79.6
100.0
3.2.2
Dimensions of the mounting slotted holes
2
6
2
6
Ø 4
Ø 4
3.2.3
Mounting holes
89.6
2x Ø4.2
3.3
Electrical connections
3.3.1
Vdc power supply
1 2 34
4
:
3
:
2
: Relative humidity output
1
: +V (12/24 Vdc)
NTC Temperature output
Connection example
1 2 34
NTC Temp. output
NTC Temp. output
RH Output
V+ (12/24 Vdc)
NTC NTC
12/24V+
AI
1 2 34
Controller 1
Humidity controller with
12/24Vdc power supply
Controller 2
Temperature controller
4. OPERATING MODE
The controller(s) to which the probe is to be connected must
be provided with a 4... 20 mA current input and an NTC input.
To have a correct measure indication is necessary to set;
–
The NTC probe for the temperature;
–
The lower and upper input limits for the relative humidity.
These limits determine the values that the instrument must
show when 4 mA (lower limit or start of scale) and when 20 mA
(upper limit or full scale limit) circulates in the input circuit.
Consult the controller user manual to see for how these limits
are to be set.
4.3.1
Values to be set on the controller
–
Lower humidity measurement limit (4 mA):
0%
;
–
Humidity measurement upper limit (20 mA):
100%
;
–
Type of temperature input:
NTC
.
