Novus TxMiniBlock User manual

NOVUS AUTOMATION 1/2
TxMiniBlock
TEMPERATURE TRANSMITTER – OPERATING MANUAL V1.0X
1INTRODU TION
TxMiniBlock is a 4-20 mA 2-WIRE Pt100 temperature transmitter to be
assemble in hea s. The esire temperature measurement range as well
as other transmitter features can be easily configure through the TxConfig
software an the TxConfig-USB interface.
The output current has a linear behavior relative to the temperature
measure by the sensor.
2SPE IFI ATIONS
Sensor input: Pt100.
Maximum Range: -200 to 650 ºC
Minimum Span: 40 ºC
3-wires, Excitation of 0.20 mA, α= 0.00385, accor ing
NBR 13773.
To use 2-wires Pt100, connect together terminals 2 an
3.
Total accuracy (Tamb 25 º ): Maximum error 0.2 % of the maximum range
for Pt100;
Response time: < 100 ms
Output: Current of 4-20 mA or 20-4 mA, 2-wires; linear relative to the
temperature measure by the sensor.
Output resolution: 0.004 mA (12 bit)
Power supply: 12 to 35 V c across the transmitter
Maximum load (RL): RL (max.) = (V c – 12) / 0.02 [Ω]
Where: V c= Power supply voltage (12 to 35 V c)
Operating temperature: -40 to 50 °C
Humidity: 0 to 90 % RH
alibration thermal drift: ± 40 ppm / °C full range
Electromagnetic compatibility: EN 50081-2, EN 50082-2
No electrical isolation between the sensor and the 4-20 mA loop.
Internal protection against supply voltage polarity inversion.
Housing in ABS, 34 mm diameter and maximum height of 18 mm.
3ONFIGURATION
If the Pt100 sensor is alrea y configure , no intervention is necessary;
installation can be imme iately performe . When a configuration change is
require , it can be ma e with the Tx onfig software; it is then sent to the
transmitter using the Tx onfig Interface.
The Tx onfig interface has a complex electronic circuit.
Do not use any other interface or cable connection to
USB; the product will be damaged and this damage is not
covered under warranty.
TxConfig interface an software are comprise in the Transmitter Setup Kit
that can be purchase from the manufacturer or from authorize ealers. The
software can be upgra e for free at the manufacturer’s website. To install, run
Tx_setup.exe an follow the instructions.
The interface connects the transmitter to the computer, as show in Figure 01.
Figure 01 – TxConfig USB Interface connections
During setup, the transmitter must be powere electrically. The TxConfig
interface itself supplies the power, but this epen s on the computer use .
Another way is to run the setup with the transmitter connecte to this
process, using the energy from the same source that fee s this process
(loop). See Figure 02.
Figure 02 – TxConfig Interface connections – Loop powere
After the connections are ma e, the user must run the Tx onfig software
an , if necessary, use the Help topic to configure the transmitter.
Figure 03 shows the main screen of the TxConfig software.
Figure 03 – Main screen of the TxConfig software
The fiel s in this screen have the following purposes:
1. Input Sensor: Pt100 (0.00385).
2. Measurement Range: Defines the transmitter measurement range.
Lower range limit correspon s to the esire temperature for a current of
4 mA.
Upper range limit correspon s to the esire temperature for a current of
20 mA.
When the Lower Limit is set with a value higher than the Upper Limit value, the
output current operates between 20 an 4 mA.
The chosen values cannot excee the Sensor Range shown in this fiel
an cannot establish a ban with wi th (span) lower than the Minimum
Range value in icate below in this fiel . See table below.
Type of Sensor Maximum
Measurement Range
Minimum
Measurement Range
Pt100 -200 a 650 °C 40 °C
Table 01 – Transmitter input sensor

TxMiniBlock Transmitter
NOVUS AUTOMATION 2/2
3. Filtration Optimization: Filters the measurements ma e by the
transmitter eliminating interferences from the electrical system that fee s
the process.
4. Sensor Failure: Establishes the behavior of the output when problems are
presente by the sensor. When Minimum is selecte , the output current shifts
to < 4 mA ( own-scale), typically use in refrigeration. When Maximum is
selecte , if shifts to > 20 mA (up-scale), typically use for heating.
5. Zero orrection: Corrects minor errors presente by the transmitter, for
example, when the sensor is change . See item Operation in this manual.
6. Transmitter Information: In this fiel , there are ata that i entify the
transmitter. This information must be informe in any consultation with the
manufacturer.
7. Read onfiguration: When presse , this allows one to rea the
configuration on the transmitter connecte .
8. Send onfiguration: When presse , this allows one to sen the
configuration to the transmitter connecte .
Note: If, on the purchase or er, the user oes not efine a specific
configuration, the following configuration will be set:
•Pt100 sensor, range 0 to 100 °C, 0 °C zero correction.
•Filter to 60 Hz an maximum output for sensor failures.
4ME HANI AL INSTALLATION
The TxMiniBlock transmitter is suitable to be installe on hea s.
Figure 04 – Transmitter imensions
5ELE TRI AL INSTALLATION
Polyami e housing for the terminals.
Section of the wire: 0.14 a 1.0 mm².
Recommen e Torque: 0.8 Nm.
RE OMMENDATIONS FOR INSTALLATION
•Input signal con uctors shoul run away from power an contactor
wires, if possible, in groun e con uits.
•The instruments must be powere by a suitable network for
instrumentation.
•System failure shoul always be taken into account when esigning a
system to avoi irreversible amage to equipment or people. Installing
RC filters (47 Ω an 100 nF, in series) is strongly recommen e at
contactor coils or any other in uctors.
ELE TRI AL ONNE TIONS
Figure 05 below shows the transmitter wiring. Terminals 1, 2 an 3 are use
for sensor input. For 2-wire Pt100, terminals 2 an 3 shall be connecte
together. The LOAD represents the input shunt of an instrument measuring
the 4-20 mA current loop.
The figure below shows the electrical connections require . Terminals 1, 2
an 3 are use for the Pt100 input. For 2-wire Pt100, terminals 2 an 3 must
be interconnecte .
Figure 05 – Transmitter electrical connections – Pt100
The LOAD represents the input shunt of an instrument measuring the 4-20
mA current loop (in icator, controller, recor er, etc).
6OPERATION
The sensor input is factory calibrate . Recalibration in the fiel is not
recommen e , but it can be accomplishe through the TxConfig software.
Contact the factory for the calibration proce ure.
When necessary, fine a justments to the transmitter output current can be
accomplishe irectly at the transmitter. To o so, short circuit transmitter
terminals 1 an 4. After 2 secon s, the output current starts to increase
gra ually until it reaches 0.8 mA above the initial value. After reaching that
value, it rops to 0.8 mA below the initial value, increasing gra ually again.
The user must monitor the output current an open the circuit when the
current reaches the esire value.
The offset correction can also be accomplishe through the TxConfig
software. The TxConfig interface can be connecte to the transmitter while it
is operating in the process. See in Figure 03 the Zero orrection fiel in the
main screen of the TxConfig software.
The user must choose the sensor span most suitable to the application. The
maximum an minimum sensor spans are limite in the TxMiniBlock an in
the TxConfig software. The user can configure any value within those two
limits.
It is important to note that the accuracy of the transmitter is always base on
the maximum range of the Pt100 sensor, regar less of the configure span. .
Example:
•Pt100 maximum span = 850 °C; 0.2% accuracy.
•Maximum error = 1.7 °C (0.2 % e 850 °C)
The error is the same no matter if total span is use (-200 to 650 °C) or a
narrower user- efine span is use , like 0 to 100 °C.
Note: When using a Pt100 simulator, make sure the TxMiniBlock’s Pt100
excitation current (0.20 mA) is compatible with the simulator specification.
7WARRANTY
The manufacturer assures the owner of the equipment, i entifie by the
purchase invoice, a twelve-month warranty as follows:
•The warranty perio starts from the ate the invoice was issue by the
manufacturer.
•Within the warranty perio , the labor an components use for the
repair are free of charge
•For any repairs, sen the equipment, along with the repair invoices, to
the manufacturer’s a ress. Costs an risks of transportation, roun
trip, will be the owner’s responsibility.
•Even uring the warranty perio , the repair of efects cause by
mechanical shock or exposure to unsuitable con itions of temperature
an humi ity will be charge .