ZET 7012-I VER.2 digital gauge pressure

(open membrane)

  • Integrated primary transducer
  • Open membrane
  • Explosion-proof version
  • RS-485 digital output
  • 4-20 mA output version available

From 257 USD

* Minimum order value: from 7 700 USD

Upper measurement range is to be specified in comments to the order

Specifications

of ZET 7012-I VER.2 digital gauge pressure (open membrane)

Metrological specifications
Measured value overpressure
Measurements tolerance 0,1%
Upper limit of pressure measuring range 0,1 MPa; 1,6 MPa; 2,5 MPa; 4 MPa; 6 MPa; 10 MPa; 16 MPa; 25 MPa; 40 MPa; 60 MPa; 80 MPa; 100 MPa
Sensitivity threshold (minimum difference between sequentially measured values) 1 Pa (for upper measurement limit: 0,1; 1,6; 2,5; 4; 6; 10; 16; 25; 40 MPa)
10 Pa (for upper measurement limit: 60; 80; 100 MPa)
Absolute measurement error (of the upper range limit) 0,1 %
Relative measurement error (of the measured value) 0,1 %
Additional measurement error (caused by temperature change) 0,1 %/10°С
Technical specifications
Data refresh rate 1 Hz
Digital interface
Data transfer interface RS-485
Exchange speed 4800, 9600, 14400, 19200, 38400, 57600, 115200 bit/s
Parity control 0 – no control; 1 – control (parity, ODD)
Exchange protocol Modbus RTU
Analog interface*
Current signal 4-20 mA
Load impedance 0…250 Ohm
Operational specifications
Membrane type open membrane
Dimensions ∅34×190 mm
Weight 380 g
Power supply from 9 to 24 V
Consumed power 0,5 W
Reverse polarity protection yes
Operational temperature range from -40 to +100 °С
Operation environment liquids and gases non-aggressive to titanium alloys and stainless steels
Design versions Standard (IP63 protection degree)
Explosion-proof* (explosion protection of 1ExdIIAT6X type, cable length – 4 m)
Pressure overload 1,5×Upper limit of pressure measuring range
Electromagnetic compatibility EMC
IEC 61000-4-2, ESD contact 4 kV; air 8 kV
IEC 61000-4-4, EFT power 0,5 kV; signal 0,25 kV
IEC 61000-4-5, Surge 500 V

*Option

Purpose

of ZET 7012-I VER.2 digital gauge pressure (open membrane)

ZET 7012-I VER.2 digital gauge pressure (open membrane) is used for fast and simple overpressure measurements and measured values data transfer in digital format via RS-485 or 4-20 mA interface.

ZET 7012-I VER.2 digital gauge pressure (open membrane) is intended for integration into various technological processes automated control systems. Open membrane type enables sensors operation in viscous, pasty and rapidly polymerizing environments.

Operating principle

of ZET 7012-I VER.2 digital gauge pressure (open membrane)

Digital gauge pressure ZET 7012-I-VER.2 (open membrane) consists of primary transducer and integrated measuring module.

The primary transducer converts the pressure value to analog signal. The measuring unit digitizes the signal from the converter and transmits the pressure value in a digital form via RS-485 interface by means of Modbus protocol  or via data transfer interface “Current loop” (4-20 mA). The membrane of the primary transducer is made of a silicon plate. The strain resistor circuit (bridge connection) is implemented on the basis of the “silicon on sapphire” technology (SOS). This allows to perform inertia-free dynamic measurements up to 1,000 Hz. In contrast to metal membranes with glued bridge strain resistors, SOS membranes allow to register pressure change at the level of 0.00001 from the upper scale of the range. Sensitivity of the electronic amplifier is 15 nV reduced to the input.

ZET 7012-I VER.2 digital gauge pressure (open membrane) has an integrated cable. Depending on the product version the pressure meters may have output for 4-20 mA or RS-485 interface connection. The pressure meters may also have  FQ14-7TJ-8 cable plug for connection of RS-485 interface (connection to measuring network is performed via ZET 7002 connector).

The pressure meters are attached to the measured object while the interface modules enabling data transfer are placed inside of electrical cabinets.

ZETLAB electrical cabinet is more compact than similar available products. Among ZETSENSOR modules advantages one should mention easy installation and de-installation of modules as well as power and signal transfer indication (which, in its turn, facilitates in-place diagnostics of the measuring system).

Pressure meters contact points designation

for connection to 4-20 mA and RS-485 interface

Color Marking Designation
Orange 1 +(9…24) V
Blue 2 RS-485 line «B» or «DATA -»
White-blue 3 RS-485 line «A» or «DATA +»
White-orange 4 GND
Brown 5 Current +
White-brown 6 Current –
Shield Cable screen

Digital pressure meters contact points designation

for connection to RS-485 interface

Разъёмы для подключения датчиков

Contact # Measuring network connection
1 +(9…24) V
2 RS-485 line «DATA -» (IN)
3 RS-485 line «DATA +» (IN)
4 GND
5 not used
6 RS-485 line «DATA -» (OUT)
7 RS-485 line «DATA +» (OUT)

Measuring network diagram

of ZET 7012-I VER.2 digital gauge pressure (open membrane)

Using digital pressure meters is especially convenient when establishing distributed measuring networks. Unlike normally used centralized measuring networks, there is no need to use “star” conection, which allows to reduce overall cable length. Since the data is transmitted in digital format, the are less requirements to data transfer channel, besides, one can use relatively inexpensive cables for the measuring network establishing.

In order to connect the measuring network to ZETLAB and ZETVIEW systems, one can use interface converter ZET 7070 (USB ↔ RS-485) or ZET 7076 (Ethernet ↔ RS-485). Using inner power supply module ZET 7070 one can connect up to 4 digital sensors to a single ZET 7070 module (and up to 60 digital sensors if external power supply module is used).

Измерительная сеть на базе ZET 7012

ZETLAB software enables connection of up to 1024 sensors to a single PC. The measuring networks can also be connected to any system using Modbus protocol via RS-485 interface.

Directive 2011/65/EU (ROHS, ROHS II)

DIGITAL PRESSURE METERS MEET THE REQUIREMENTS OF DIRECTIVE 2011/65/EU (ROHS, ROHS II) CONCERNING LIMITATION TO USE HAZARD SUBSTANCES (PB, HG, CD, CR(VI)) IN ELECTRICAL AND ELECTRONIC EQUIPMENT; THEY ARE MANUFACTURED USING LEAD-FREE METHOD, IN COMPLIANCE WITH THE EUROPEAN COMMUNITY REQUIREMENTS

Basic configuration

of ZET 7012-I VER.2 digital gauge pressure (open membrane)

Цифровой датчик давления ZET 7012-I

Digital pressure meter basic configuration includes:

  • Digital gauge pressure ZET 7012-I-VER.2 (open membrane);
  • ZET 7002 measuring line coupling unit;
  • plug for the cable FQ14-4TJ-7;
  • spring nozzle for 7 mm plug;
  • paronite gasket;
  • set of operational documentation.

Necessary measuring products

supplied upon request

Преобразователь интерфейса ZET 7076 Ethernet/Wi-Fi ↔ RS-485
ZET 7076 interface converter
Ethernet Connection

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