ZET 7112-A VER.2 pressure meter

  • Data refresh rate 1, 5, 25, 100, 200 Hz
  • Synchronization accuracy ±1 µsec
  • Data transmission interface CAN 2.0

From 411 USD

* Minimum order value: from 7 700 USD

Specifications

of ZET 7112-A VER.2 pressure meter

Metrological Data
Measured value absolute pressure
Upper limit of pressure measuring range 0.16 MPa
Lower limit of pressure measuring range 160 Pa
Sensitivity threshold (minimum difference between sequentially measured values) 1 Pa
0.1 mm WG
Absolute measurement error (of the upper range limit) 0.1 %
Relative measurement error (of the measured value) 0.1 %
Additional measurement error (due to temperature change) 0.1 %/10 °C
Real-time operation control temperature in the sensor,
synchronization quality,
data quality
Measurement quality check sensing element integrity check,
measuring circuit check
Technical Specifications
Data refresh rate 1, 5, 25, 100, 200 Hz
Synchronization accuracy ±1 µsec
Data transmission interface CAN 2.0
Transmission rate 100, 300, 1000 kbps
Performance Specifications
Dimensions ∅34×190 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 (IP68 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 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 pressure meter ZET 7112-A VER.2

No adjustment is required

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 pressure meter ZET 7112-A VER.2

The ZET 7112-A VER.2 pressure meter 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;

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

Operation Principle

Digital pressure meter ZET 7112-A VER.2

Functional units of ZET 7112-A VER2 pressure meter are as follows: a primary transducer and a measuring unit; they are combined in a single cover which ensures digital processing of the signal from the transducer within the minimum distance from it, which significantly decreases distortions of the measurement result.

The primary transducer converts the pressure to analog signal. The measuring unit digitizes the signal from the converter and transmits the pressure value in a digital form via CAN 2.0 interface. 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 glue-fixed bridge strain resistors, SOS membranes allow to register pressure change at the level of 0.00001 of the upper scale of the range. Sensibility of the electronic amplifier is 15 nV reduced to the input.

Digital pressure meter ZET 7112-A VER.2 has an integrated cable with FQ7 socket at its end point. Connection to a measurement network is performed by means of ZET 7002 connector.

Digital pressure sensor complete with connector

Measurement Network Diagram

Based on the ZET 7112-A VER.2 pressure meter

Digital pressure meter ZET 7112-A VER.2 are ideal for building distributed measurement networks since they do not require expensive cables for this purpose.

During the primary and planned calibration, parameters of the ZET 7112-A VER.2 pressure meters are stored in the device memory which significantly simplifies its operation. To perform measurements, there is no need to set the pressure meter, it starts operating right after being powered on and generates the values of the measured pressure, 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. Connection options 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 pressure meters may be connected to a single ZET 7174 unit. The figure below shows the structure of a distributed measurement network based on ZET 7112-A VER.2 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 pressure meters may be used for precise maintenance of parameters in 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»: «Maximum change» – change amplitude.

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

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  for 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.

Basic configuration

of ZET 7112-A VER.2 pressure meter

ZET 7112-I VER.2 digital gauge pressure mini

Digital pressure meter basic configuration includes:

  • Digital pressure meter ZET 7112-A VER.2;
  • measuring line branch ZET 7002;
  • connection for the cable FQ14-4TJ-7;
  • spring nozzle for 7 mm connection;
  • CAF gasket;
  • set of operational documentation.

From 411 USD

* Minimum order value: from 7 700 USD

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Necessary measuring products

supplied upon special order

ZET 7174
ZET 7174
USB connection

ZET 7176
ZET 7176
Ethernet connection