SIAP+MICROS t020 TTA Guide

t020 TTA
Water Temperature Transducer
User Manual and maintenance

User manual and maintenance
t020-di TTA.docx
26/10/2023 2Vers.: 1.0
Summary
1Introduction ................................................................................................................................................ 3
2Technical specificaion ................................................................................................................................ 4
3Installation and maintenance ..................................................................................................................... 5
3.1 Installation.......................................................................................................................................... 5
3.2 Maintenance ...................................................................................................................................... 5
4Electrical connection .................................................................................................................................. 6
4.1 Natural Version connections .............................................................................................................. 6
4.2 Version I, V, S connections ................................................................................................................ 6
4.2.1 Connector output ........................................................................................................................... 6
4.2.2 Connection cable ........................................................................................................................... 6
4.3 Data readinding in serial .................................................................................................................... 7
4.3.1 RS485 Modbus mode .................................................................................................................... 7
5Generic information ................................................................................................................................... 8
5.1 Safety................................................................................................................................................. 8
5.2 Appropriate use of the equipment ..................................................................................................... 9
5.3 Storage .............................................................................................................................................. 9
5.4 Moving ............................................................................................................................................... 9
5.5 Disposal information .......................................................................................................................... 9
6Revision history ....................................................................................................................................... 10

User manual and maintenance
t020-di TTA.docx
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1Introduction
The sensing element is made up of Pt100 platinum thermoresistance with response curve according to DIN
43760 class 1/3 standards. Intelligent Sensors: The transducer belongs to the family of intelligent sensors as
it is equipped with an internal micro-processor which performs, among other functions: control of correct
operation, data pre-processing, A/D conversion of electrical signals, etc. These features ensure excellent
accuracy, high data reliability. The sensor can be accompanied by a Siap+Micros calibration certificate or by
certificates issued by other external laboratories (SIT, Colonnetti, etc.). The body of the sensor is made of PVC,
it is equipped with an IP-67 connector and 15 m of cable. The transducer complies with the provisions of the
European EMC regulations, is protected against overvoltages and fully complies with the prescriptions of the
WMO (World Meteorological Organization)
Ordering codes:
Natural output: .........................................................t020-TTA-N
Current output:.........................................................t020a-TTA-I
Tension output: ........................................................t020b-TTA-V
RS485 Modbus output: ............................................t020c-TTA-S

User manual and maintenance
t020-di TTA.docx
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2Technical specificaion
Measurement performance
Transducer
Pt100 1/3 DIN 43760
Measurement range
-30 ÷ 60 °C
Accuracy (current, tension, serial outputs)
1/3 DIN 43760
Resolution
0.1
Operating conditions
Temperature
-30 ÷ +60 °C
Output
Natural
Pt100 a 4 fili
Current
4 ÷ 20 mA ↔-30 ÷ 60 °C
Tension
0 ÷ 2 V ↔-30 ÷ 60 °C
RS485 MODBUS
Temperatura
Power supply and Consumption
Voltage supply (non-natural output versions)
7 ÷ 30 Vdc
Power consumption
Min
Typical
Max
4 ÷ 20 mA
5
25
0 ÷2 V / RS485 MODBUS
1
3
Mechanical specifications
Protective body
Plastic material
Electrical connections
P67 / 4 male poles

User manual and maintenance
t020-di TTA.docx
26/10/2023 5Vers.: 1.0
Probe Dimension:
H1 – lenght: 140 mm
D1 – diameter: 15 mm
Box dimension:
L2 – lenght: 120 mm
H2 – total height: 122 mm
H3 – box height: 80 mm
P2 – depth: 62 mm
I2 – hole spacing 52 mm
D2 – diameter: 10 mm
Element:
A – probe TTA
B – connection cable (~15m)
C – electronic container (only I, V e S)
D – connector (only I, V e S)
E– backing plate
Weight (probe only): 150 gr
3Installation and maintenance
3.1 Installation
The body of the probe is immersed in the liquid whose temperature is to be measured. If the situation requires
it, the probe can be protected with an adequate stilling and protection pipe.
In the versions with non-natural outlet, the container with the electronics must be positioned in a place suitably
distant and protected from the body of water. The container can be fixed using the 2 holes on the fixing bracket.
A connection cable is provided for connection to the data logger.
3.2 Maintenance
No particular maintenance is required other than the periodic check of the measuring point and the quality of
the acquired measurement. In case of malfunction, replace the sensor and send it for inspection and
verification at the factory.

User manual and maintenance
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4Electrical connection
4.1 Natural Version connections
Cable
Red
White
Green
Black+Shield
Signal
I+
V+
V-
I-
4.2 Version I, V, S connections
Below is the pinout of the connector on the signal conversion electronics.
4.2.1 Connector output
Pin
I / V / S / SDI12
output
1
Vcc
2
+4÷20 mA
+0÷2 Vdc
B-RS485
3
-4÷20 mA
-0÷2 Vdc
A-RS485
4
GND
4.2.2 Connection cable
The connection cable supplied with the sensor is made with circular connectors with housing, 4x24 AWG
shielded cable and ferrules for connection to the data logger terminals. The sock is connected to the black
cable.
Pin
1
2
3
4
Cable
Red
White
Green
Black+Shield
Signal
Vcc
(alim.)
+4÷20 mA
+0÷2 Vdc
B-RS485
-4÷20 mA
-0÷2 Vdc
A-RS485
GND
(alim.)
Calza / Shield

User manual and maintenance
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4.3 Data readinding in serial
Sensors with RS485 Modbus output send data only upon specific request from the PC, data logger or PLC.
Below are the correct communication parameters of the device performing the interrogation.
4.3.1 RS485 Modbus mode
Serial port settings: 9600 baud, no parity, 8 data bit, 1 bit di stop
Compatible with ModBus RTU protocol, supported functions: “03 – read Holding Registers” e “04 – Read Input
Registers”.
Data Type: “2 registers swapped float IEEE 754 in the form CDAB where A is the most significant byte of the
float and D is the less significant byte of the float (swapped float)”.
ID
Registers
Units
Reg. 1-2
Reg. 3-4
Reg. 5-6
Reg. 7-8
Reg. 9-10
Reg. 11-12
Reg. 13-14
3
1
°C
Temperature
-
-
-
-
Diagnostic
Supply Voltage

User manual and maintenance
t020-di TTA.docx
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5Generic information
The qualitative level of our instruments is the result of a continuous evolution of the product. This may cause
differences between what is reported in the manual and the instrument you have purchased.
Siap+Micros S.p.A. reserves the right to modify without notice technical specifications and dimensions to adapt
them to the needs of the product.
5.1 Safety
Please read these safety instructions carefully before using this product:
•The warranty will be void if the product is used differently from the instructions described in this manual.
•Any sign of tampering will void the warranty
•Use the devices only according to the instructions (environmental management, operation, wiring,
installation, etc.) provided in this manual
•The correct and safe operation of the device can only be guaranteed if the transport, storage, operation
and management of the device are compliant. This also applies to product maintenance.
•The device shall not be exposed to aggressive chemicals or solvents that could damage the plastic
casing and/or corrode the metal parts.
•Maintenance should only be performed by qualified and well trained personnel.
It is appropriate to carry out a careful risk assessment in relation to the context of installation and use of the
device by the installer considering the possible meteorological station in its complexity without being limited to
the sensor.
The instruments must be installed according to the rules of the trade, with equipment that complies with
applicable regulations and using supports correctly sized by qualified technicians and designed for the specific
purpose.
During installation operations, check the suitability of the surrounding environment and compliance with local
safety regulations.
The manufacturer declines all responsibility in case of failure due to negligence of the instructions, tampering,
uses not described in this manual, improper use, use by operators not trained.
Read the instructions and intended use carefully and be sure you understand before installing the device
Before starting the activities, check the integrity of the instrument to be installed, prepare the equipment
necessary for the work and wear the necessary PPE.
Take adequate measures to prevent the access of foreign personnel (untrained and uninformed) during the
installation, maintenance or replacement of the instrument.
Take precautions to avoid falling objects, both during the installation phases and during the operation of the
instrument.
Do not perform any activity in bad weather conditions.

User manual and maintenance
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During maintenance, particularly if the station is not frequented, visually check for the absence of dangerous
insects and, if not, use suitable insecticides.
Consider the presence of any animals near the station, if so, pay attention to them.
Use only SIAP+MICROS original spare parts.
The instrument is not classified suitable (according to Directive 2014/34/EU) for use in atmospheres with
potential explosion risk pursuant to Directive 99/92/EC.
SIAP+MICROS strives to minimize health and safety risks in all phases of the instrument's life, including
installation, use, maintenance, decommissioning and disposal.
5.2 Appropriate use of the equipment
Use the instrument for its intended purpose, do not use it for any other purpose or cause malfunctions and/or
damage.
5.3 Storage
If you do not plan to use the equipment for an extended period of time (at least one year) disconnect all cables
from the equipment, place it in a clear plastic bag along with a bag of desiccant salts and seal the bag with
tape. Put appropriate indication on the bag of the contents and weight of the equipment by inserting the wording
"HANDLE WITH CARE".
Store the instrument in an environment with a temperature between 0°C and 60°C with a humidity not
exceeding 80%. Make sure that the instrument is stored in a stable position and that it cannot be damaged or
moved by inexperience or carelessness. Do not stack other tools or weights. Do not place the instrument on
top of other instruments and in any case ensure the solidity and stability of the underlying support.
Non esporre, stoccare lo strumento in ambienti con presenza di vapori e/o gas corrosivi.
5.4 Moving
In order to avoid any damage to the device during transportation, please keep it in upright position without
shaking.
5.5 Disposal information
Electrical and electronic equipment marked with specific symbol in compliance with 2012/19/EU
Directive must be disposed of separately from household waste. European users can hand them
over to the dealer or to the manufacturer when purchasing a new electrical and electronic
equipment, or to a WEEE collection point designated by local authorities. Illegal disposal is
punished by law.
Disposing of electrical and electronic equipment separately from normal waste helps to preserve natural
resources and allows materials to be recycled in an environmentally friendly way without risks to human health.

User manual and maintenance
t020-di TTA.docx
26/10/2023 10 Vers.: 1.0
6Revision history
The following table shows the description of the changes made to this document.
Version
Date
Updates
1.0
05/06/2023
Current version of the document.
All the information content in this document are the current available at the printing phase. Siap+Micros S.p.A. reserve the rights to change
the specifications without any advance notice