ZET 7010 DS digital strain-gauge transducer

  • Stress-strain testing
  • RS 485 data transfer interface
  • Engineering Structures Monitoring element
  • Self-diagnostics

From 394 USD

* Minimum order value: from 7 700 USD

SPECIFICATIONS

of ZET 7010 DS digital strain-gage transducers

METROLOGICAL PERFORMANCE
Parameter measured strain, tension
Transducer type with integrated sensing element
Measuring range -1,800…+1,800 µm/m
Measuring range without mounting plates -300…+300 µm/m
Measuring range with mounting plates (at different anchoring points) -450…+450 µm/m
-600…+600 µm/m
-1,800…+1,800 µm/m
Threshold sensitivity for ranges, µm/m:
-300 to +300
-450 to +450;
-600 to +600;
-1,800 to +1,800.
2 µm/m
3 µm/m
4 µm/m
12 µm/m
Temperature influence on sensitivity, by 10 °С (from measuring range) 2 %
Zero drift for 24 hrs 0.5 %
Restoring force 1,000 N
Breaking strain (without mounting plates) 500 µm/m
SPECIFICATIONS
Data interface RS-485
Exchange rate 4,800, 9,600, 14,400, 19,200, 38,400, 57,600, 115,200 bit/s
Rate of data update 1 Hz
Parity check 0 — no check, 1 — check (odd parity, ODD)
Exchange protocol Modbus RTU
PERFORMANCE PARAMETERS
Dimensions 197×56×30 mm
Weight 300 g
Device power 9 to 24 V
Power consumption 0.5 W
Polarity reversal protection available
Operation temperature range -40 to +100 °С
Version Standard (protection index IP65)
Explosion-proof* (explosion protection, type 0ЕхiaIICT6 Х)
ELECTROMAGNETIC COMPATIBILITY EMC
MEK 61000-4-2 (IEC 61000-4-2), ESD contact 8 kV, air 15 kV
MEK 61000-4-4 (IEC 61000-4-4), EFT power 4 kV, signal 2 kV
MEK 61000-4-5 (IEC 61000-4-5), Surge 4,000 V

In EVEN mode, parity check is not supported. Modbus ASCII not supported.

* Cost to be estimated individually

  • COMPUTING METHOD

    Input data are converted into resultant or, according to linear law with tilt set as transfer ratio or, according to piecewise linear law as per calibration table

  • SYNCHRONIZATION

    Interface converter synchronizes digital transducers with each other. This enables monitoring interaction at different points (location of digital transducers) of the object and plotting distribution diagrams.

PURPOSE

of ZET 7010 DS digital strain-gage transducers

ZET 7010 DS digital strain-gage transducer is purposed for tensile-compression control of concrete structures, it is used in ESMS (engineering structures monitoring systems). These transducers can be used in stationary and mobile ESMS systems.

Digital strain-gage transducer is used to assess stressed strain behavior and give a warning signal when strain elastic zone is exceeded, and transition to the irreversible deformation zone occurres.

ZET 7010 DS digital strain-gage transducers are manufactured in industrial sealed casing for dust and moist protection and enhanced shock resistance.

PRACTICAL APPLICATION

of ZET 7010 DS digital strain-gage transducers

Stress strainstate

Monitoring system of stressed strain behavior and displacement of engineering structures points is implemented on 7010‑DS digital strain-gage transducers, which are the instrument.

OPERATING PRINCIPLES

of ZET 7010 DS digital strain-gage transducers

ZET 7010 DS digital strain-gage transducer includes primary transducer and digital measuring module ZET 7010.

Each digital strain-gage transducer can be configured individually pursuant to requirements set to the measurement. Configuration is saved in the ZET 7010 measuring module flash memory; thus, application of digital strain transducers allows starting measurements without additional processing and adjustments.

ZET 7010 DS digital strain-gage transducers have 2 four-pin plugs FQ14-4ZK-S for connection to instrument communications net (scope of delivery includes a female connector).

Разъёмы цифрового датчика
CONTACT NUMBERDESIGNATION
1+(9…24) V
2RS-485 line “B” or “DATA-“
3RS-485 line “A” or “DATA+”
4GND

ANCHORING

of ZET 7010 DS digital strain-gage transducers

For strain monitoring, transducer shall be fixed on measurement object in such a way that transducer anchoring axis aligns with the direction of controlled strain.

Transducer is anchored to the measurement object at two points via n6.2 mm hole on one side of transducer and a 6.2 mm wide slot on the other side of transducer, which allows transducer anchoring with 180±5 mm base to apex.

When transducers are mounted on concrete surfaces, anchor studs or М6 female-threaded anchors shall be used.

Installation on metal surfaces – using М6 weld studs, or М6 bolts to fixing holes.

When anchoring ZET7010 DS transducers, reliable fixation must be provided at anchor points to exclude slipping, for which star lock washers DIN 6798 A (outward claws) М6 are recommended.

INSTRUMENT COMMUNICATIONS NETWORK DIAGRAM

of ZET 7010 DS digital strain-gage transducers

When installing instrument communications net, series connection is used for ZET 7010 DS transducers, the resulting instrument chain-work is connected to computer via interface converter ZET 7070 (RS-485 ↔ USB) or ZET 7076 (RS-485 ↔ Ethernet).

Number of transducers connected to ZET 7070 module without external power unit is 2 maximum, and 60 when operating.

Измерительная сеть на базе цифровых тензометрических датчиков ZET 7010 DS

Измерительная сеть на базе цифровых тензометрических датчиков ZET 7010 DS

ZETLAB software supports connection of up to 200 digital transducers to one computer. Instrument communications nets can also be connected to any system that uses Modbus protocol via RS-485 interface.

CONTROL

of ZET 7010 DS digital strain-gage transducers

When digital transducers are manufactured, all essential settings are saved in ZET 7010 DS measuring module memory. In case you need to tune digital transducer yourself, for example, during periodic recalibration, you have to connect the device to computer over ZET 7070 interface converter and run the “Device Manager” program.

Below you can see an overview of digital strain-gage transducers configuring, values for DS modules specified, where resistive strain gage half-bridge connection circuit is used.

“Settings” tab

Intended for measuring channel adjustment.

Вкладка «Настройки»

PARAMETER VARIABILITY PERMISSIBLE VALUES DESCRIPTION
Rate of data update, Hz Yes 1
5
25
125
sampling frequency (for digital ZET7110 DS)
Physical quantity Yes Strain
Tension
Value of “Strain” parameter shall be selected when it is required to monitor relative strain.
Value of “Tension” parameter shall be selected when it is required to monitor tension and the Young modulus for the tested material is known
Measurement unit Yes µm/m
mm/m
cm/m
m/m
%
Pa
kPa
MPa
Specified measurement units to identify physical units used for measurement.
Measurement units − µm/m, mm/m, cm/m, m/m, % all belong to parameter Physical quantity – “Strain”.
Measurement units − P», kPa, MPa belong to parameter “Physical quantity” – “Tension”
Young modulus, GPa Yes Young modulus (elastic modulus) − Physical quantity, describing the material ability to resist stretch.
This parameter is only set in case when “Physical quantity” parameter is set – “Tension”
Anchoring variant Yes А (±300 µm/m)
Б (±450 µm/m)
В (±600 µm/m)
Г (±1800 µm/m)
Measuring range depends  on the variant of digital transducer anchoring

“Measurements” tab

The “Measurements” tab shows instrument channel info. Name of instrument channel can be set on this tab.

Вкладка «Измерения»

“Drift” tab

On “Drift” tab, transducer reading drift is set.

Вкладка «Смещение»

PARAMETER VARIABILITY PERMISSIBLE VALUES DESCRIPTION
Drift state Yes off
on
Turn on/off recalculation of current measured value to the value specified in parameter “Meas.unit drift”
Meas.unit drift Yes The value is specified that must be set as the digital transducer current reading. Further, reading alterations shall be tracked related to the specified value

Examples of various options of the “Drift” functionality application
when using digital transducers

Example No.1
It is known that by the time of digital transducer installation, structural element was subjected to 500 MPa stress. In order to account for pre-stressed condition of the structural element, one should input “500” in the “Meas.unit drift” edit box; and select “on” parameter in the “Drift status” edit box, upon which press “Save” button. Digital transducer begins tracking tension alterations of the monitored structural element, accounting for pre-stressed condition – 500 MPa.

Example No.2
After resistive strain gages are installed, the monitored structural element shall be in position related to which one have to start measuring strain thereof. One should input “0” in the “Meas.unit drift” edit box, in “Drift status” edit box select “on”, upon which press “Save” button. Digital transducer begins recording strain of the structural element as related to the pre-set zero value.

Configuring overview

ZET 7х10 DS digital transducer is equipped with bridge connection integrated resistive strain gage.

While configuring the ZET 7х10 DS digital transducer the following issues are essential:
—  To measure relative strain set the following parameters in “Settings” tab:
—  Physical quantity – “Strain”;
—  Measurement unit – set needed measurement units (µm/m, mm/m, cm/m, m/m, %);
—  Anchoring variant – select the variant to anchor ZET 7х10 DS digital transducer (“А (±300 µm/m)”, “Б (±450 µm/m)”, “В (±600 µm/m)”, “Г (±1800 µm/m)”).
— To measure the material tension, set the following parameters in “Settings” tab:
—  Physical quantity – “Tension”;
—  Measurement unit – set the required measurement units (Pa, kPa, MPa).
—  Young modulus, GPa – specify elastic modulus of the monitored structural element material (values of elastic modulus for some materials are given in table below);
—  Anchoring variant – select the variant to anchor ZET 7х10 DS digital transducer (“А (±300 µm/m)”, “Б (±450 µm/m)”, “В (±600 µm/m)”, “Г (±1,800 µm/m)”).

MATERIAL VALUE OF ELASTIC MODULUS Е (GPa)
Aluminum 69
Copper 100
Steel 210
Glass 60
Concrete 20

Download

Digital sensors operation user manual

* Mounting plates are purposed to anchor digital transducers onto metal surfaces.

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

DIGITAL TRANSDUCERS 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

STANDARD CONFIGURATION

ZET 7010 DS digital strain-gage transducers

Базовый комплект поставки ZET 7X10-DS

Standard supply package of strain-gage transducer includes the following:

  • ZET 7010-DS digital transducer;
  • FQ14-4TJ-7 cable plug (2 pcs.);
  • 7 mm spring connection to plug (2 pcs.);
  • mounting plates*;
  • No.3 mounting kit for ZET 7х10-DS;
  • package of operational documents.

From 394 USD

* Minimum order value: from 7 700 USD

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ESSENTIAL MEASUREMENTS EQUIPMENT SUPPLIED UPON EXTRA ORDER

Interface converter ZET 7076 Ethernet/Wi-Fi ↔ RS-485
ZET 7076 interface converter
Ethernet connection