ZET 7112-I VER.2 digital gauge pressure

  • Integrated primary transducer
  • Ready for operation
  • CAN 2.0 interface

From 336 USD

* Minimum order value: from 7 700 USD

Attention

The minimal kit necessary for measurements performance includes the digital transducer and interface converter with ZETLAB Software
The interface converter is not included into delivery scope and should be bought separately

Specifications

of ZET 7112-I VER.2 digital gauge pressure

Metrological Data
Measured value overpressure
Upper limit of pressure measuring range 0,1 MPa; 0,16 MPa; 0,25 MPa; 0,4 MPa; 0,6 MPa; 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; 160 MPa
Resolution 0.005 %
Relative measurement error (from the measured value) 0.1 %
Additional measurement error (due to temperature change) 0.1 %/10 °C
Parameters diagnostics power supply control
data quality control
sensing element integrity control
Technical Specifications
Data refresh rate 1, 5, 25, 100, 200 Hz
Data transmission interface CAN 2.0
Transmission rate 100, 300, 1000 kbps
Operational Specifications
Dimensions ∅31.5×160 mm
Weight 380 g
Power supply 9 to 24 V
Consumed power 0.5 W
Reverse polarity protection yes
Operational temperature range -40 to +100 °C
Operation environment liquids and gases non-aggressive to titanium alloys and stainless steels
Design Standard (IP63 protection degree)
Ex-proof* (1ExdIIAT6X type explosion protection, cable 4 m)
Overpressure 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


* Cost is calculated individually

  • Synchronization

    The interface converter synchronizes the digital gauge pressure meters. This allows to observe the mutual influence at various measurement points. Synchronization accuracy at CAN transmission rate of 1000 kbps is ± 1 µsec.

Advantages

Digital gauge pressure ZET 7112-I VER.2

No adjustment is needed

The characteristics are stored in the measuring unit memory

Measurement Results

Measurement results are transmitted in a digital form

Integrated primary transducer

Calculations are performed in close vicinity from the PT

Reliability

Stable characteristics and high reliability in operation

Purpose

Digital gauge pressure ZET 7112-I VER.2

ZET 7112-I VER.2 digital gauge pressure is intended for use in automated process control systems for various industrial applications:

  • petroleum and natural gas industry;
  • metallurgy industry;
  • energy industry;
  • construction industry;
  • chemical industry;
  • food industry;
  • utilities and water supply;
  • motorized and shipping facilities;
  • leak detection systems.

It is a digital gauge pressure for simple and fast opressure values measurements which transmits the measured values in a digital form via CAN 2.0 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

Operating principles

of ZET 7112-I VER.2 digital gauge pressure

Functional units of Digital gauge pressure ZET 7112-I VER.2 are as follows: a primary transducer and a measuring unit; they are placed into a single cover which ensures digital processing of the signal from the transducer within the minimum distance from it which significantly decreases the influence of distortions on the measurement results. The membrane of the primary transducer is made of a flexible silicon plate. This allows to perform inertia-free dynamic measurements with duration up to 1 ms. In contrast to metal membranes with glue-fixed bridge strain resistors, membranes of this type allow to register pressure change at the level of 0.00005 of the upper scale of the range.

The primary transducer converts the pressure to analog signal. Then the measuring unit digitizes the signal with 24-bit AD converter and transmits the pressure value in a digital form via CAN 2.0 interface. Inside the unit, a self-diagnostics and auto-calibration circuit is implemented, and data quality parameter is also transmitted via the data channel.

Digital gauge pressure ZET 7112-I VER.2 is equipped with an integrated cable with FQ7 socket at its end. Connection to a measurement network is performed with the 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 measurement system).

INSTALLATION REQUIREMENTS

for ZET 7112-I VER.2 digital gauge pressure

The pressure transducers should be installed in the corresponding mounting seats, connectors, weldolets, etc.

Mounting of the pressure transducer (installation into the mounting seat) is to be conducted with the use of wrench and hex connection. It is not allowed to use any other parts of the transducer package for installation purposes.

In order to ensure hermeticity of the transducer at the installation site, use the sealing end (paronite gasket).

Use of other sealing instruments (foam tape, linen fiber, etc.) is forbidden, since it may damage the sensing membrane. In this case, installation of the transducer is conducted in enclosed volume, thus creating excessive pressure, which may exceed the operating range of the transducer.

Installation requirements Figure 1

Installation requirements Figure 2

Contacts labelling of digital transducers

for connection to CAN 2.0 interface

Digital gauge pressure ZET 7112-I VER.2 - contacts designation

Color Labelling Designation
Red 1 +(9…24) V
Blue 2 CAN 2.0 line «H» (IN)
Green 3 CAN 2.0 line «L» (IN)
Yellow 4 GND
Pale green 5 CAN 2.0 line «H» (OUT)
Pale green 6 CAN 2.0 line «L» (OUT)

Measurement Network Diagram

Digital gauge pressure ZET 7112-I VER.2

Digital gauge pressure ZET 7112-I VER.2 are ideal for establishing distributed measurement networks since they do not require expensive cables for this purpose.

During the primary and planned calibration, parameters of ZET 7112-I VER.2 digital gauge pressure are stored in the device memory which significantly simplifies its operation. To perform measurements, there is no need to change the settings of the gauge pressure meter, it starts operating right after being powered on and generates the values of the pressure being measured, so no subsequent signal processing is required as well. Measurement results may be used for automated control of pressure level in control systems.

The interface converters must be used for connecting the measurement network to ZETLAB and ZETVIEW systems. Variants of connection via USB (ZET 7174), Ethernet/Wi-Fi (ZET 7176), GSM (ZET 7177), and radio channel (units ZET 7172M and ZET 7172S) are available as well. Up to 4 sensors may be connected to a single ZET 7174 unit. The figure below shows the structure of a distributed measurement network based on ZET 7112-I VER.2 digital gauge pressure meters.

Scheme of measuring network 7XXX-CAN-2.0
Connection via the SAN 2.0 interface of pressure sensors

In combination with control units, the digital gauge pressure meters may be used for precise parameters control of various processes.

Test impact types

AC - alternating signal

FR: «Required frequency value»: «Frequency tolerance» – alternating signal frequency;

AM: «Required signal amplitude value»: «Signal amplitude tolerance» – alternating signal amplitude;

OF: «Generated signal bias»: «Generated signal bias tolerance» – generated signal bias;

TM: «Signal analysis time» – signal control time (minimal signal analysis time for transient processes or long-time tests)

Example:
AC;FR:0.5:0.01;AM:0.4:0.002;OF:0.1:0.0001;TM:5
Alternating signal with frequency: 0.5 ± 0.01 Hz, amplitude: 0.4 ± 0.002 V, bias: 0.1 ± 0.0001 V, minimal signal control time – 5 s.

DC - constant signal

LE: «Required signal level»: «Signal level tolerance» – generated signal level.

TM: «Signal analysis time» – control signal time (signal analysis minimal time for transient and long-time processes tests)

Example:

DC;LE:0.5:0.001;TM:5
constant signal: 0.5 ± 0.001 V, minimal signal control time – 5 s.

ST1 - stepwise change

AM: «Minimal value»: «Maximum value» – change range.

TM: «Signal setting time» – time before signal control start

Example:
ST1;AM:100:200;TM:5
stepwise change: for 100..200 units, minimal signal control time – 5 s.

ST2 - stepwise change

MD: «Minimal change»: «Maximal change» – value change amplitude.

TM: «Signal setting time» – the time after which signal control is started

Example:
ST2;MD:10:10.5;TM:6
stepwise change: for 10..10.5 units in modulus, minimal signal control time – 6 s.

PPS -Pulse-per-second signal

SP: «Acceptable counts deviation» – amount of counts before or after start of a second.

Level change to be checked one time in a second.

Example:
PPS;SP:2 –
the change should take place in the beginning of a second, 2 counts.

Device type is selected from the dropdown list. In order to select a device, pick an element with left mouse key and choose a device to be checked from the list.

Use selector to set particular test. To set the test number click the number with left mouse key and set the required value by scroll. If the self-check is on, the selector will not be available until the user stops the project or the self-check is over. There is a key for start / stop of the process. The green key means that the diagnostics process is on, grey key stands for the idle state.

Indicator is a timer showing the elapsing time of the current test. The countdown is started after beginning of any test. Test results are available in the log.

Practical Application

of ZET 7112-I VER.2 digital gauge pressure

Leakage detection system

Digital gauge pressure ZET 7112-I VER.2 are one of the key measuring units for leakage detection in leakage detection systems (LDS).

Basic configuration

of ZET 7112-I VER.2 digital gauge pressure

Basic configuration of ZET 7112-I VER.2 digital gauge pressure

Digital gauge pressure meter delivery scope includes:

  • digital gauge pressure ZET 7112-I VER.2;
  • paronite gasket;
  • set of operational documentation.

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Necessary measuring products

supplied upon request

ZET 7174
ZET 7174
USB connection

ZET 7176
ZET 7176
Ethernet connection