Digital gauge pressure ZET 7012-I VER.3

(open membrane)

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

From 308 USD 

* Minimum order value: from 7 700 USD

*Delivery term – from 8 weeks

Specifications

of ZET 7012-I VER.3 digital gauge pressure

Metrological specifications
Measured value gauge pressure
Measuring tolerance 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
Sensitivity threshold (minimum difference between two 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 fluctuations) 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
Indicator red, 7 sections, 4-digit
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 supply 0,5 kV; signal 0,25 kV
IEC 61000-4-5, Surge 500 V

*Option

Purpose

of ZET 7012-I VER.3 digital gauge pressure

Digital gauge pressure ZET 7012-I VER.3 (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 VER3 digital gauge pressure meter 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 principles

of ZET 7012-I VER3 digital gauge pressure

ZET 7012-I VER.3 digital gauge pressure meter 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 in the range up to 1,000 Hz. In contrast to metal membranes with glued bridge strain resistors, SOS membranes enable registering pressure change at the level of 0.00001 from the upper range limit. Sensitivity of the electronic amplifier is 15 nV reduced to the input.

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

ZETLAB electrical cabinet is more compact than similar available analog 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).

To connect the pressure meter to the measuring network one should put the cables inside of the pressure meter package, remove upper cover and connect the cables to the contact points in accordance with the scheme. The table below shows contact points designation layout.

For connection via current output use I+, I- and PWR contact points.
For connection via RS-485 use the PWR, D-, D+ and GND contact points.

Marking Designation
I- Current –
I+ Current +
PWR +(9…24) ВV
D- RS-485 Line «B» or «DATA -»
D+ RS-485 Line «A» or «DATA +»
GND GND
Connecting pressure sensors ZET-7X12 with indicator to measuring network

Measuring network diagram

of ZET 7012-I VER.3 digital gauge pressure

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-type” 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 pressure meters to a single ZET 7070 module (and up to 60 digital pressure meters if external power supply module is used).

ZETLAB software enables connection of up to 1024 pressure meters 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 GAUGE 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 PRODUCTS; THEY ARE MANUFACTURED USING LEAD-FREE METHOD, IN COMPLIANCE WITH THE EUROPEAN COMMUNITY REQUIREMENTS

Basic configuration

of ZET 7012-I VER.3 digital gauge pressure meters

базовая комплектация цифровых датчиков семейства ZETSENSOR

Digital gauge pressure basic configuration includes:

  • Digital gauge pressure ZET 7012-I VER.3 (open membrane);
  • ZET 7002 measuring line branch;
  • 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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