ascon TRH03 Installation and operation manual

Ascon Tecnologic - TRH-03 - ENGINEERING MANUAL - PAG. 1
TRH03
HUMIDITY AND
TEMPERATURE MODULE
Engineering manual
20/07 - Cod.: ISTR_M_TRH03_E_00_--
ASCON TECNOLOGIC S.r.l.
Viale Indipendenza 56, 27029 - VIGEVANO (PV) ITALY
Tel.: [phone] - Fax: [phone]
http:\\www.ascontecnologic.com
e-mail: [email protected]
FOREWORD
This manual contains the information necessary for the
installation of the product, we therefore recommend that
the utmost attention is paid to the following instructions
and to save it.
This document is exclusive property of Ascon Tecnologic which
forbids any reproduction and disclosure, even in part, of the
document, unless expressly authorized. Ascon Tecnologic
reserves the right to make any formal or functional changes at
any moment and without any notice.
 Ascon Tecnologic and its legal representatives do not as-
sume 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 must be
equipped with additional electromechanical devices
which will guarantee safety.
Disposal
The appliance (or the product) must be
disposed of separately in compliance
with the local standards in force on
waste disposal.
INSTRUMENT DESCRIPTION
General description
TRH03 is a capacitive system for the measurement of relative
humidity and temperature, all the components are installed on a
single calibrated module that sends the measurements obtained
via a digital communication interface.
TRH03 uses modern temperature and humidity detection tech-
nologies and sophisticated digital technologies for data conver-
sion to ensure that the product has high reliability and excellent
long-term stability.
T he sensor includes a capacitive humidity sensor and high-
precision temperature measurement devices connected with a
high-performance 8-bit mcontroller. The product has excellent
quality, quick response and strong anti-jamming abilities. Each
sensor is precisely calibrated in a humidity calibration chamber.
The specifications of the construction procedures, the calibration
coefficients stored in the microcontroller, the sensor integrated in
the computer to recall the calibration coefficients allow for stable
readings over time.
Standard single-bus interface, system integration quick and easy.
Small size, low power consumption, long signal transmission
distance, making it the best choice for all kind of applications and
even the most demanding applications. Products for the 3-lead
(single-bus interface) connection convenience.
TRH03 can be conveniently used in HVAC, dehumidifier, testing
and inspection equipment, consumer goods, automotive, auto-
matic control, data loggers, home appliances, humidity regulator,
medical, weather stations, and other humidity measurement and
control and so on.
INSTALLATION INFORMATION
Mounting requirements
This instrument is intended for permanent installation, for indoor
use only, in an electrical panel which encloses the rear housing,
exposed terminals and wiring.
Select a mounting location having the following characteristics:
1. It should be easily accessible;
2. There is minimum vibrations and no impact;
3. There are no corrosive gases;
4. There are no water or other fluids (i.e. condensation).
Dimensions
13.826.7
2.213.6
58.8 53.4
Ø4.1

Ascon Tecnologic - TRH-03 - ENGINEERING MANUAL - PAG. 2
Electrical connections
General notes about wiring
1. Do not run input wires together with power cables.
2. When a shielded cable is used, the protection shield should
be connected at one side only.
Pin assignement
Pin Color Name Description
1Red
VDD
Power
(3.3V-5.2V)
VDD
SDA
GND
NC
1
2
3
4
2
Yellow SDA Serial data,
Dual-port
3Black
GND Ground
4
NC Empty
TECHNICAL CHARACTERISTICS
Tecnical specifications
Characteristic Relative Humidity Temperature
Measuring range 0... 95% -40... +80
Resolution 0.1% RH 0.1°C
Accuracy ±3% RH at 25°C ±0.3°C
Electrical specifications
Characteristic Value
Supply voltage 3.3... 5.2 VDC
Power consumption < 500 mA
General specifications
Characteristic Value
External dimensions 26.7 x 58.8 x 13.8 (L x H x D)
Mounting
1 screws Ø4 mm max.
Sensor weight About 14 g
(without the connection cable)
Conection cable length 2 m
Work area 10... 20 m2,
with air circulation
Installation position
Horizontal or vertical
Working temperature
-40... 80°C
Ambient humidity
0... 95% (with no condensation)
Case material
PC + ABS
Single-bus communication
TRH03 device uses a simplified single-bus communication.
Single bus because it uses only one data line.
Because the communications use the master-slave structure,
only the host calls the sensor and the sensor will answer, so the
host to access the sensor must strictly follow the sequence of the
single bus protocol, if there is a sequence error, the sensor will
not respond to the host.
Data definition
For communication and synchronization between the micropro-
cessor and the TRH03, single-bus data format, a transmission of
40 data, the high first-out. Specific communication timing given
in the image that follows.
HOW TO ORDER
TRH03 20 Relative Humidity and Temperature module with 2 m
connection cable.