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 error (from the measurement range) 0,1%
Upper limit of pressure measurement 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
Resolution 0,005 %
Additional measurement error (attributed to temperature change) 0,1 %/10°C
Technical specifications
Data refresh rate 1 Hz
Digital interface
Data transfer interface RS-485
Exchange speed 4800, 9600, 14400, 19200, 38400, 57600, 115200 bps
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 °C
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

Designation

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 elastic titanium plate. This allows to perform inertia-free dynamic measurements of pressure fluctuations with the duration up to 1 ms. In contrast to metal membranes with glued bridge strain resistors, membranes of this type allow to register pressure change at the level of 0.00005 from the upper scale of the range.

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 should be installed in the corresponding mounting seats.

Installation of pressure meters with an open membrane (i.e., installation into the mounting seat) is conducted with the use of wrench key and corresponding hexagonal connection. it is not allowed to use any other parts of transducer package for installation.

In order to secure hermeticity of the pressure transducer with open membrane, it is necessary to use a radial seal (017-020-19). Use of any other sealing instruments (foam tape, linen fiber, etc.) may lead to damage of the measuring membrane. In this case, installation of the transducer is conducted in the enclosed volume.

Mounting requirements for the pressure gauge - dimensional drawing

Use of the sealing ring in the course of digital transducer mounting - dimensional drawing

Pressure meters contact points designation

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

Contacts designation - color labelling

Color Labelling Designation
Red 1 +(9…24) V
Blue 2 RS-485 line «B» or «DATA -»
Green 3 RS-485 line «A» or «DATA +»
Yellow 4 GND
Pale green 5 Current +
Pale green 6 Current –

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).

Scheme of measuring network 7XXX-RS-485

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.

Connection scheme of the pressure transducers with current output is shown in the figure below:

Connection scheme of the digital pressure transucer with current output - contacts labelling

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)

Digital pressure meter basic configuration includes:

  • digital gauge pressure ZET 7012-I-VER.2 (open membrane);
  • ZET 7001 measuring line coupling unit;
  • paronite gasket;
  • set of operational documentation.

Necessary measuring products

supplied upon request

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

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