Digital inclinometer ZET 7154

  • Integrated primary transducer
  • Measured parameter: tilt angle
  • CAN 2.0
  • Engineering Structures Monitoring System element

From 757 USD

* Minimum order value: from 7 700 USD

Specifications

of digital inclinometer ZET 7154

Metrological characteristics
Measured physical value tilt angle for X and Y axes
Measuring range for X and Y axes from -15° to +15°
Tolerance limits of intrinsic absolute error of tilt measurements ±(0,045°+0,045×φ)
where φ – tilt angle measured value
Inherent “drift” of zero in 100 hours, related to tilt measurement range in normal conditions, maximum ±0,045°
Inherent “drift” of zero for 1 year, related to tilt measurement range in normal conditions, maximum ±0,07°
Tolerance limits of complementary error caused by 10°С temperature change ±0,05°
Real time operation control synchronization quality
data quality
Measurement reliability control sensing element integrity check
Specifications
Data refresh rate 1 Hz
Sensor type integrated sensing element
Data transfer interface CAN 2.0
Exchange speed 100, 300, 1000 kb/sec
Interface inputs overvoltage protection (current 1 A) 19 V
Interface inputs impulse protection (350 W, 8/20 ms) 28 V
Operational specifications
Dimensions 98×105×28 mm
Weight 315 g
Device power from 9 to 24 V
Consumed power 0,5 W
Operational temperature range from -40 to +80 °С
Product version Standard (protection index IP65)
Explosion-proof* (explosion protection, type 0ЕхiaIICT6 Х (IP67))
OEM (compound coating)
Electromagnetic compatibility EMC
IEC 61000-4-2, ESD contact 8 kV, air 15 kV
IEC 61000-4-4, EFT power 4 kV, signal 2 kV
IEC 61000-4-5, Surge 4000 V

*The price is calculated on individual basis

Additional information

  • Synchronization

    Interface converter synchronizes digital sensors with each other. This allows to observe interaction (i.e. digital sensors positioning) in different areas of the controlled object.

Advantages

of digital inclinometer ZET 7154

No adjustment required

all settings are stored in the measuring module integrated memory

Measurement results

are represented in digital format

Integrated PT

calculations are performed in immediate vicinity to the PT

Reliabilty

stable characteristics and high reliability throughout operational period

Function

of digital inclinometer ZET 7154

Digital inclinometer ZET 7154 is used in static systems for platforms positioning control (2-axial mode) with a tolerance below 0,1 %. Low power voltage and CAN protocol enable integration of ZET 7154 digital inclinometer into almost any industrial system. “Set to zero” option allows to calibrate the sensor to zero in every axis, thus preventing platform critical tilt in the set coordinate.

Digital inclinometer ZET 7154 – major application spheres:

  • Bearing structures and buildings deflexion and tilt control within automated structural health monitoring systems;
  • positioning maintenance, alignment of platforms;
  • robotics industry;
  • position and displacement parameters measurements, emergency notification in the case of controlled object critical displacement;
  • security systems;
  • navigation.

Operating principles

of digital inclinometer ZET 7154

Digital inclinometer ZET 7154 is a measurement module with integrated primary transducer. ZET 7154 digital inclinometer has high precision both in single- and two-axial operation mode.

Digital inclinometer output data (measuring results):

  • calibrated acceleration values;
  • tilt angles precise values;
  • inner temperature;
  • voltage value;
  • fault and alarm signals.
Цифровой инклинометр ZET 7054. Принцип работы

The selected tilt measurement range of measuring axes is provided only in the case if zero values for both measuring axes of the inclinometer correspond to its horizontal position.

It is necessary to provide primary horizontal position of the inclinometer using measuring axes directions shown on the inclinometer package, as well as to provide correct inclinometer orientation by azimuth.

Mounting of the inclinometer (the inclinometer base has has 4 mounting holes with 4,5 mm diameter) can be performed on the mounting surface using bolts or dowels. In order to provide possibility of inclinometer adjustment by azimuth and horizon, it is necessary to use adjustment plate during its mounting.

Adjustment plate also has 4 mounting holes with 4,5 mm diameter for mounting on the controlled object surface.

ZET 7154 digital inclinometers can also be mounted on walls by means of angle bar 100×63×6 mm.

The sensors mounted on the controlled object surface are connected to data acquisition and processing nodes (i.e. to the electrical cabinet with interface and addtional modules).

ZETLAB electrical cabinet has compact dimensions if compared to available analogs. ZETSENSOR modules advantages are as follows: they are easy to install and to dismount, they have power indication and data transfer option, which considerably simplifies on-site system diagnostics.

Temperature impact

on ZET 7154 digital inclinometers readings

  • Inclinometer readings (Axes Х and Y)

    ZET  slide
  • Temperature fluctuations (digital temperature sensor readings)

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  • pokazenia sutki zet  slide

Practical application

of digital inclinometer ZET 7154

Мониторинг положения балок

Measuring network diagram

based on digital inclinometer ZET 7154

In order to establish a measuring network using digital sensor, you will need interface converters to connect digital sensors to PC with ZETSENSOR Software. The Software will automatically detect all inclinometers connected to the network, perform their diagnostics, and notify the user of the sensors faults, if any. In addition to standard functions the Software displays all the measurements performed by the system, thus allowing to timely prevent critical deviation from the set parameters and to use the data received for further calculations.

A single interface module supports connection of up to 60 digital inclinometers.

The interface connectors are used not only for connnection to PC, but also for establishing measuring networks located far from operator’s WKS – it is possible by means of data transfer via radio channel or GSM.

Схемы подключения цифровых инклинометров ZET 7154 к измерительной сети

Control

of digital inclinometer ZET 7154

Digital inclinometer: parameter settings

It is possible to set the following parameters for ZET 7154 digital inclinometers:

  • Conversion frequency — sensor data register frequency: 1 Hz.
  • Averaging filter ratio — number of averaged counts: 256.
  • Smoothing ratio — 0.001…1. Ratio α for EMA – filter, which is calculated by the formula: DMAt = α*EMAt + (1-α)*DMAt-1. The less the ratio α is, the higher is the smoothing ratio and the slower is the reaction speed. For slow changes it is recommended to set the value 0.005, for fast – 0.1
  • Offset X — current «zero» drift in the range -90°…90° (calibrational compensation which is applied to the source data).
  • Offset Y — current «zero» drift in the range -90°…90° (calibrational compensation which is applied to the source data).

Вкладка

Offset settings

The following parameters are available for offset settings:

  • Offset— on/off. When the offset is activated, the current values by X and Y axes are set to zero. The offset value is shown in the tab “Settings”, section “Offset, axis”. When the offset is switched off, the data values are shown without changes.
  • Offset, units – allows to set module readings value upon offset option activation (the set value will not change).

Вкладка

Metrological self-monitoring

of digital inclinometer ZET 7154

Digital inclinometer ZET 7154 has metrological diagnostic self-monitoring function — in particular, auto-check of transducer serviceability while being in operation. Based on positive results of metrological self-monitoring, it is possible to increase inter-verification interval without implementing standard verification procedure.

There has been developed a special software for metrological self-monitoring of ZETSENSOR digital transducers in automatic mode.

Main window of “Metrological self-monitoring ZET 7XXX” software is shown in the figure. The “Metrological self-monitoring” tab allows user to select the type of device, test, control measurements routine, and to receive the self-check results.

Метрологический самоконтроль ZET 7154

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. To choose the device type you have to left-click the element, and to select the required device to be checked from the pop-up list.

Selector is used to choose the test. To change test number you have to left-click the corresponding number and to set the required value with the scroll wheel. If self-check is run, selector remains inactive till the moment the user suspends the project operation or till the self-check procedure is finished.
There is a button to activate and suspend the measurements. During diagnostics the button is green, and grey when stopped.

Indicator serves as a timer showing how much time is left before the current test is finished. It takes the count after any test is begun. Test results are shown in the log.

Practical application

of ZET 7154 digital inclinometer

Engineering structures monitoring system

ZET 7154 digital inclinometers are used for structures and buildings tilt measurement control within the scope of Structural health monitoring systems.

Basic configuration

of digital inclinometer ZET 7154

Базовая комплектация ZET 7X54

Digital inclinometer basic delivery scope includes:

  • Digital inclinometer ZET 7154;
  • adjustable plate for ZET 7х54 (2 plates+ mounting hardware);
  • plug for the cable FQ14-4TJ-7 (2 pcs.);
  • spring hose for 7 mm connection (2 pcs.);
  • set of operational documentation.

Necessary measuring products

supplied upon request

ZET 7173
ZET 7173
Off-line operation mode

ZET 7176
ZET 7176
Ethernet Connection

ZET 7174
ZET 7174
USB Connection

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