Ascon tecnologic TRH52 User manual

Ascon Tecnologic - TRH52 - OPERATING INSTRUCTIONS - PAG. 1
TRH52
ACTIVE HUMIDITY AND
TEMPERATURE PROBE WITH
4... 20 mA OUTPUTS
OPERATING INSTRUCTIONS
Vr 01 (ENG) - 18/11 - cod.: ISTR-MTRH52ENG01
ASCON TECNOLOGIC S.r.l.
Viale Indipendenza 56, 27029 - VIGEVANO (PV) ITALY
Tel.: [phone] - Fax: [phone]
http:\\www.ascontecnologic.com
[email protected]
PREFACE
 This manual contains the information necessary for
the product to be installed correctly and also instruc-
tions for its maintenance and use; we therefore recom-
mend that the utmost attention is paid to the following
instructions and to save it.
This document is the exclusive property of Ascon Tecnologic
S.r.l. which forbids any reproduction and divulgation, even
partially, of the document, unless expressly authorized.
Ascon Tecnologic S.r.l. reserves the right to make any formal
or functional changes at any moment and without any notice.
Ascon Tecnologic S.r.l. and its legal representatives do not
assume any responsibility for any damage to people, things
or animals deriving from violation, wrong or improper use or
in any case not in compliance with the instrument features.
 Whenever a failure or a malfunction of the device
may cause dangerous situations for persons, thing
or animals, please remember that the plant has to be
equipped with additional electromechanical devices
which will guarantee safety.
1. INSTRUMENT DESCRIPTION
1.1 General description
TRH52 is a passive relative humidity (current loop) and an
NTC temperature probe. The output signals are normalized
in current at 4... 20 mA (% RH) and NTC (temperature).
1.2 Probe description
RH sensor and
Temperature sensor
protective cap Cable gland
M20 x 1.5
Connection
terminals
(inside the box)
2. USAGE WARNINGS
2.1 Admitted use
 The device has been designed as a measuring
transducer.
Electrical equipment should be installed, operated, serviced,
and maintained only by qualified personnel.
 The installer must ensure that the EMC rules are
respected, also after the instrument installation, if
necessary using proper filters.
Index
1. Instrument description ............................................... 1
1.1 General description........................................................... 1
1.2 Probe description.............................................................. 1
2. Usage warnings........................................................... 1
2.1 Admitted use..................................................................... 1
3. Installation warnings................................................... 2
3.1 Mechanical mounting........................................................ 2
3.2 Dimensions [mm] .............................................................. 2
3.2.1 Mechanical dimensions ........................................................ 2
3.2.2 Dimensions of the mounting slotted holes............................ 2
3.2.3 Mounting holes ..................................................................... 2
3.3 Electrical connections ....................................................... 2
3.3.1 Vdc power supply ................................................................. 2
4. Operating mode........................................................... 2
4.3.1 Values to be set on the controller ......................................... 2
5. Problems and maintenance........................................ 3
5.1 Measurements errors........................................................ 3
5.2 Cleaning............................................................................ 3
5.3 Disposal ............................................................................ 3
6. Warranty ....................................................................... 3
7. Technical Data ............................................................. 3
7.1 Electrical characteristics ................................................... 3
7.2 Mechanical characteristics................................................ 3
7.3 Functional features ........................................................... 4

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.
 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
1234
4:
3:
2: Relative humidity output
1: +V (12/24 Vdc)
NTC Temperature output
Connection example
1234
NTC Temp. output
NTC Temp. output
RH Output
V+ (12/24 Vdc)
NTC NTC
12/24V+
AI
1234
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;
–T he 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.

Ascon Tecnologic - TRH52 - OPERATING INSTRUCTIONS - PAG. 3
5. PROBLEMS AND MAINTENANCE
5.1 Measurements errors
Reading errors can occur if settling time is too short, or be
caused by steam, sprayed water, air drafts, direct exposure
to sunlight, or presence of condensation on the sensor.
To obtain accurate measurements the sensor should be left
to settle in the existing atmosphere for some time.
To reduce the possibility of condensation on the humid-
ity sensor place the probe in ventilated position and where
there is not a quick and elevation variation of temperature
(from cold to warm).
5.2 Cleaning
It is recommended to clean the box only with a cloth welted
with water or with a detergent neither abrasive nor contain-
ing solvents.
Should be necessary to remove the protective cap, do not
cause any mechanical stress to the sensors and absolutely
avoid touching the Humidity sensor surface.
5.3 Disposal
The appliance (or the product) must be
disposed of separately in compliance
with the local standards in force on
waste disposal.
6. WARRANTY
The instrument is under warranty against manufacturing
flaws or faulty material, that are found within 18 months from
delivery date. The warranty is limited to repairs or to the
replacement of the instrument.
The eventual opening of the housing, the violation of the in-
strument or the improper use and installation of the product
will bring about the immediate withdrawal of the warranty
effects.
In the event of a faulty instrument, either within the period of
warranty, or further to its expiry, please contact our sales de-
partment to obtain authorisation for sending the instrument
to our company.
The faulty product must be shipped to Ascon Tecnologic with
a detailed description of the faults found, without any fees or
charge for Ascon Tecnologic, except in the event of alterna-
tive agreements.
7. TECHNICAL DATA
7.1 Electrical characteristics
Power supply: 9... 28 Vdc [Use only SELV type CLASS 2
power supplies (≤15 W)];
Power consumption: 20 mA max.;
Maximum load resistance for 4... 20 mA output:
150 Ωat 9 Vdc;
Software class: A;
Relative humidity sensor type: Current loop;
Relative humidity signal output: 4... 20 mA (0... 100%RH);
Temperature sensor type: NTC;
Temperature signal output: 4... 20 mA (-40... +60°C).
7.2 Mechanical characteristics
Housing: Plastic;
Dimensions: 80 x 80 mm, depth 50 mm;
Weight: 160 g approx.;
Mounting: Wall mounting (with sensor towards the bottom);
Connections: Screw terminals with 5 mm pitch;
Connection wires: 0.32... 2.0 mm (AWG 22…14);
Recommended multipolar cable: Cable Ø6.0... 12.5 mm
(for UL 9... 12 mm/0.35... 0.47 in.);
Enclosure rating: IP 65;
Action type: 1;
Environmental rating: Internal usage, Type 1 enclosure;
Pollution degree: 2;
Over-voltage category: I;
Rated impulse voltage: 330 V;
Period of electrical stress on the insulating parts: Long
period (IEC EN 60730);
Shipment and storage temperature: -40... +80°C.
Storage humidity: 0... 100 RH% (without icing/condensation).

Ascon Tecnologic - TRH52 - OPERATING INSTRUCTIONS - PAG. 4
7.3 Functional features
Humidity range: 0... 100%RH (4... 20 mA);
Humidity overall accuracy: ±3% between 20... 80%RH
(typical values at 25°C);
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
0012030405060708090 100
(%RH)
%RH
Relative Humidity measurement accuracy
Temperature range: -40... 60°C (4... 20 mA);
Temperature overall accuracy: 1%;
Response time in steady conditions (Signal: 63%;
%RH: 33...75 %; T: 25°C; Air flow: 1 m/s): 10 s;
Humidity measurement recovery time after saturation:
Depending on the airflow;
Current delivered in the event of sensor malfunction : 3 mA;
The product complies with the following harmonised
standards: UL/CSA/IEC/EN 60730-1 (Automatic electrical
controls for household and similar use);
Construction of control: Operating (non-safety related)
Independently mounted control;
Purpose of control: Humidity and/or temperature sensor;
Conformity:UN EMC 2004/108/CE directive (EN 61326,
Electromagnetic compatibility),
UN LV 2006/95/CE directive (Instrument operat-
ing under 50 VAC and 75 VDC).