Digital temperature sensor ZET 7020

Type of sensors connected: thermocouple
RS-485 data interface
Ready for operation

POR (price on request)

* Minimum order value: from 7 700 USD

Specifications

of digital temperature sensors ZET 7020

Metrological perfomance
Measured value	temperature
Minimum value of the measured temperature	-270 °C (depending on the thermocouple used)
Maximum value of the measured temperature	2500 °C (depending on the thermocouple used)
Sensitivity threshold (minimum difference value between two consequtively measured values)	0,001 °C
Absolute measuring tolerance (with a type-T thermocouple, Tolerance Class 1)	0,5 %
Relative measuring tolerance (from the measured value)	0,05 %
Additional measuring tolerance (depending on temperature changes)	0,05 %/10°C
Technical specifications
Type of connected thermocouples	R, S, B, J, T, E, K, N, A1, A2, A3, L, M
Electrical voltage measurement range from the connected primary transducers	-73 – +73 mV
Cold junction compensator	yes (integrated)
Refresh rate	1; 4 Hz
Data interface	RS-485
Data rate	4800, 9600, 14400, 19200, 38400, 57600, 115200 bit/s
Parity control	0 – no control; 1 – control (oddity, ODD)
Data communication protocol	Modbus RTU
Linear inputs overvoltage protection ( 1 A)	19 V
Interface inputs impulse protection (350 W, 8/20 ms)	28 V
Operational parameters
Dimensions	71×39×17 mm
Weight	30 g
Device power	9 – 24 V
Power consumption at voltage 12 V	up to 40 mA
Reverse polarity protection	yes
Operation temperature range*	from -40 up to +100 °C
Electromagnetic compatibility EMC
MEK 61000-4-2 (IEC 61000-4-2), ESD	contact 4 kV, air 8 kV
MEK 61000-4-4 (IEC 61000-4-4), EFT	power 0,5 kV, signal 0,25 kV
MEK 61000-4-5 (IEC 61000-4-5), Surge	500 V

* Operation measurement temperature range is detrmined by characteristics of the connected thermocouple

Parity control in the EVEN mode is not supported. Modbus ASCII is not supported.

Product versions
Standard: laboratory version – green plastic casing.
OEM: compound coating.
Industrial*: standard module placed into leak-proof casing (with transparent cover).
*Option

Functions

of digital temperature sensors ZET 7020

Digital temperature sensor ZET 7020 is designed for measuring temperature of liquid, solid, gaseous and granular mediums, which are safe for the material of thermocouple casing. Application spheres: heat power energy, chemical and metallurgical industry.

The digital sensor is used for fast and easy temperature measurement and does not require calibration of measuring and data processing channels.

Operation principles

of digital temperature sensors ZET 7020

Measuring module ZET 7020 and a thermocouple together form a digital temperature sensor.

ZET 7020 module converts the signal received from thermocouple into temperature readings.

Particular type of thermocouple should be chosen in accordance with features of particular task (measuring range, tolerance, operational environment).

The-principle-of-a-digital-temperature-sensor-7020

The sensors are mounted on the measured object and interface modules providing data transfer are placed inside of electrical cabinets.

ZETLAB electrical cabinet has compact dimensions if compared with available analogues. Among ZETSENSOR modules advantages one can mention easy mounting and de-installation as well as power indication and signal transfer, which makes it easy to perform on-site system diagnostics.

Connection schemes

of digital temperature sensors ZET 7020

Connection of digital temperature sensors ZET 7020 to a PC can be implemented via USB (converter USB ↔ RS-485 ZET 7070), Ethernet or Wi-Fi (converter Ethernet/Wi-Fi ↔ RS-485 ZET 7076).

The delivery scope of interface converters includes ZETLAB Software which considerably enhances the capabilities of digital temperature sensors implementation. Measuring networks can also be connected to any system using the Modbus protocol via interface RS-485.

Measuring network construction

based on digital temperature sensor ZET 7020

Digital temperature sensors ZET 7020 perfectly suit for designing of temperature measurement distributed systems. Since signal processing is performed at the place of measurement this considerably increases precision of measurement results. Besides, one can use inexpensive cables for data transfer. Up to 4 digital sensors can be connected to a single module ZET 7070 when using integrated power supply module of ZET 7070 and up to 60 if an external power supply unit is used.

Specialized calculator

for calculating the required type of cables in the construction of measuring lines

Attention

When placing an order for a thermocouple, please, make sure that its wire length suits you, since increasing the cable length without approval from the manufacturer may affect the metrological specifications of the thermocouple.

Software interface

of digital temperature sensors ZET 7020

Modbus ZETLAB
ZETSENSOR operation via interface converters ZETSENSOR with standard ZETLAB software
Modbus RTU
Perfomance of ZETSENSOR RS-485 via third-party interface converters and software
Modbus RTU (LINUX)
Perfomance of ZETSENSOR RS-485 via third-party interface converters and software in OS Linux
OPC DA
Perfomance of ZETSENSOR via third-party interface converters in real-time mode

ZETLAB measurement results

of digital temperature sensors ZET 7020

Joint use of digital sensors and control modules enables creation of control sytems, automated equipment complexes and various control devices.

The recorder. Temperature measurement results

Graph of temperature in the office. ZET 7020 sensor reading

The temperature value measured by the digital temperature sensors ZET 7020 at 12 points of the room

The-temperature-value-measured-by-the-digital-sensors

Control

of digital temperature sensors ZET 7020

Digital temperature sensor ZET 7020 starts temperature measurement immediately after power connection and does not require any special technical maintenance. All the necessary settings are set in the course of manufacturing process and are stored in the measuring module memory. The obtained temperature readings data are transmitted via RS-485 interface and Modbus protocol.

When changing the primary transducer it is necessary to update module settings. In order to do this one has to connect module to the PC, start the software “ZETLAB – device manager” and set the parameters in the tab “Thermocouple”.

Configuring the Digital Temperature Sensor

Configuration management

Parameter	Possibility of changes	Acceptable values	Description
Thermocouples type	Yes	Voltage Resistor CJC Type (R, S, B, J, T, E, K, N, A1, A2, A3, L, M)	Value «Voltage» is to be set for voltage measurement. Value «Resistor» — for impedance measurements. «CJC» — for measuring of cold junction temperature. The remaining values are set depending on the type of primary transducer used.
Frequency Hz	Yes	1; 4	Sensor data frequency
Minimum measured temperature value	Yes	—	The parameter determines minimum measuring value of the module. The value is specified in accordance with technical specifications of the primary transducers used together with the module.
Maximum measured temperature value	Yes	—	The parameter determines maximum measuring value of the module. The value is specified in accordance with technical specifications of the primary transducers used together with the module.
Measured value	Yes	°C kOhm mV	The value is determined based on the selected type of thermocouples (for “Voltage” – mV, “Resistor” – Ohm, for remaining options – °C)
Shift	Yes	on off	The parameter always should be set as «on»
Sensor serial number	Yes	—	The parameter is set only when it is necessary to identify the serial number of the sensor connected to the module ZET7020

TECHNICAL SUPPORT

Design

and installation of measuring networks

Programming

of digital sensors

DIAGNOSTICS

of digital sensors

Basic configuration

of digital temperature sensors ZET 7020

Basic configuration of the digital sensor includes:

Digital temperature sensor ZET 7020;
DIN rail mounting panel for plastic modules 71×39;
set of operational documentation.

POR (price on request)

* Minimum order value: from 7 700 USD

Data protection notification

Please note that the personal data provided by you is used exclusively for the purposes of fulfilling our contractual obligations, including, but not limited to: issuing invoices, delivery documents, documentation relating to customs clearance process, etc. We do not provide your personal data to any third party except for the purposes relating to our direct contractual obligations. Upon completion of order processing and expiry of the warranty period for the Products provided by our Company, we do not store or process any of your personal data. Please note, that our Company’s Confidential policy does not imply any advertising or marketing activities with the use of your personal data (including your Company name, address, your E-mail, phone number and other information provided by you with a view to placing an Order and organization of the Delivery).

Necessary measuring equipment

supplied upon special order

ZET 7070 interface converter
USB connection

Interface converter ZET 7076 Ethernet Wi-Fi RS-485
ZET 7076 interface converter
Ethernet connection

Digital temperature sensor ZET 7020

Specifications

Product versions

Functions

Operation principles

Connection schemes

Measuring network construction

Specialized calculator

Attention

Software interface

ZETLAB measurement results

Control

TECHNICAL SUPPORT

Design

Programming

DIAGNOSTICS

Basic configuration

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Data protection notification

Necessary measuring equipment

ZETLAB

Company

Support

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