ZET 7110 Digital Strain Gauge Sensor

  • data interface CAN 2.0
  • static measurements
  • explosion-proof version *

From 157 USD

Load sensors  ZET 7110 in industrial explosion version are supplied upon special order for additional cost. 

Specifications

of the ZET 7110 Digital Strain Gauges

Metrological Data
Measured value deformation, strain, torque, force
Connected primary transducers (PT) electric voltage measuring range -6 to +6 mV/V
Sensitivity threshold (minimum difference between sequentially measured values) 0.0001 mV/V
Absolute measurement error (of the upper range limit) 0.05 %
Relative measurement error (of the measured value) 0.05 %
Additional measurement error (due to temperature measurement) 0.05 %/10°C
Parameters diagnostics feed control, data quality control, bridge or half-bridge integrity control, measuring unit calibration
Technical Specification
Type of connected gauges force gauge, bridge or half-bridge strain gauges (strain resistors)
DC voltage fed to the PT 4.2 ± 0.2 V
Maximum current fed to the PT 25 ± 1.5 mA
Data refresh rate 1, 5, 10, 25, 125 Hz
Data interface CAN 2.0
Transmission rate 100, 300, 1,000 kbps
Performance Specification
Dimensions 71×39×17 mm
Weight 30 gr
Power supply 9 to 24 V
Consumed power (w/o PT) 0.5 W
Reverse polarity protection yes
Operational temperature range -40 to +100°C
Electromagnetic Compatibility
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
  • Calculation Method

    The input data are converted to the resulting value either in a linear fashion with the slope determined as the transmission ratio, or in a piecewise linear fashion according to the calibration table

  • Synchronization

    Interface converter synchronizes the digital sensors. This allows to observe the interaction in different points (locations of the digital sensors) of the facility and draw diagrams.

  • Hardware Versions

    Standard: laboratory design in a plastic cover (green).
    OEM: board covered with a sealing compound.
    Heavy Duty*: depending on the task specifics, this may be a version in a heavy duty cover (black) or location of the standard-design unit in an air-tight cover (with a transparent lid).
    Ex-proof*: in a heavy duty cover with the explosion protection system of 0ExiaIICT6 X type.
    *The cost is calculated individually.

Advantages

of the ZET 7110 Digital Strain Gauges

No adjustment is needed

The characteristics are stored in the measuring unit memory

Measurement Results

Measurement results are transmitted in a digital form

PTS Power Supply

Primary transducers are powered by the measurement unit

Reliability

Stable characteristics and high reliability in operation

Purpose

of the ZET 7110 Digital Strain Gauges

The ZET 7110 module is intended for measuring the relative deformation using primary transducers based on tension gauges. These may be either assembled tension gauges (force gauges, torque gauges), or detachable tension gauges connected using half-bridge or bridge mode.

Gauge runs on DC voltage, so ZET 7110 is used for static measurements.

The sensors are fixed on the object of measurement while the interface units ensuring information transmission are mounted in an air-tight box.

An advantage of the ZETSENSOR units is easy installation and uninstallation as well as indication of feed and signal transmission which, in its turn, facilitates diagnostics of the system at the facility.

Note

The ZET 7111 gauge is intended for dynamic measurements which inputs AC to the bridge circuit.

Application Scope

of the ZET 7110 Digital Strain Gauges

  • Mechanical testing of materials

  • Deformation studies

    studying deformation distribution in parts of machines, structures, and constructions

  • Measurement of mechanical deformations

  • Stress determination

    in the depth of operated or tested concrete and reinforced concrete structures (foundation slabs, columns, beams, and ceiling slabs), in weighing equipment of various purposes

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

DIGITAL STRAIN GAUGE SENSORS 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

Operation Principles

of the ZET 7110 Digital Strain Gauges

The digital strain gauge station consists of a tension gauge (tension bridge) and the ZET 7110 measuring unit which converts the signal from the gauge to the values of force, tension, pressure, etc. The resulting values are transmitted via CAN 2.0 interface.

Principle-of-operation-7110
Principle-of-operation-ZET-7110

Rules for Using in Explosion-Hazard Areas

for the ZET 7110 Digital Strain Gauges

When using digital gauges in explosion-hazard areas, one should observe the applicable national requirements.

Installation in explosion-hazard areas is allowed for heavy duty design (metal cover) digital gauges intended for use in explosion-hazard areas and bearing the relevant marking on their bodies: 0ExiaIICT6 X.

For the communication via data transmission channels and electric circuits the circuits of digital gauges installed in explosion-hazard areas shall be connected to interface converters and power supply sources through intrinsic safety barriers located in explosion-safe areas. A typical connection diagram for digital gauges installed in explosion-hazard zones is provided on the figure, and the recommended types of intrinsic safe barriers, in the table below.

Connection Diagrams

of the ZET 7110 Digital Strain Gauges

The use of load sensors is very convenient when building distributed measurement networks. As opposed to conventional centralized measurement circuits, connection of “star” type is not required, which allows for decreasing the overall length of circuits. Since the data are transmitted in a digital form, the requirements for data transmission channel can be lowered and less expensive cable can be used for network building.

When building a measurement network, ZET 7110 gauges are connected in series; the resulting measurement chain is then connected to a computer using an interface converter: ZET 7174 (CAN ↔ USB), ZET 7176 (CAN ↔ Ethernet or Wi-Fi), ZET 7177 (CAN ↔ GSM) or ZET 7172S + ZET 7172M + ZET 7174/ZET7176 kit (data transmission via radio channel).

The-construction-of-a-measuring-network-based-on-ZET-7110-600x392

The number of gauges connected to ZET 7174 shall not exceed 4. ZETLAB software supports connection of up to 200 digital gauges to a single computer.

Diagram of connecting to a measurement line

Scheme-of-connection-to-the-measuring-line 7110

Basic Configuration

of ZET 7110 Digital Strain Gauges

Laboratory version

Basic delivery scope of tension sensor includes:

  • digital sensor  ZET 7110;
  • DIN-rail mounting panel for plastic modules 71×39;
  • set of operational documentation.

Industrial version

Basic delivery scope includes:

  • digital sensor ZET 7110in industrial casing;
  • plug for the cable FQ14-4TJ-7 (2 pcs.);
  • spring nozzle for 7 mm plug (2 pcs.);
  • connector for the cable FQ14-7TJ-8;
  • spring nozzle for 8 mm plug;
  • set of operational documentation.

From 157 USD

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Necessary measuring equipment

supplied upon special order

ZET 7174
ZET 7174
USB connection

ZET 7176
ZET 7176
Ethernet connection

ZET 7173
ZET 7173
Offline recorder

ZET 7177
ZET 7177
GSM network connection