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IA 110 Calibrating a Pressure Sensor
Education / GUNT Hamburg / Mechatronics / Automation /

The experimental unit IA 110 can be used to calibrate an electronic pressure sensor under practical conditions.


  The test pressure is generated with a conventional piston manometer. The piston is loaded with weight rings and generates a defined test pressure p = Fw/AP, where Fwis the force due to the weights and AP is the cross-sectional area of the piston. A hand-operated spindle is used to relieve the pressure after measurement allowing the piston to return to a rest position. The influence of friction is minimised by rotating the piston during measurement. The test pressure generated in this way is applied to the diaphragm of a pressure sensor. The pressure-dependent electrical output signal is indicated on a digital display.

  The pressure sensor used is a state-of-the-art ceramic measuring cell, in which strain-dependent piezo resistors are mounted on a ceramic diaphragm. The resistors are configured to form a measuring bridge. An integrated amplifier circuit evaluates the pressure-dependent detuning of the measuring bridge and outputs a proportional voltage signal.

  The kit also includes a second pressure sensor in the form of a cutaway model for enhanced clarity. The entire experimental unit is contained in a compact housing, and is easy to handle.

  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.


Learning Objectives / Experiments

- familiarisation with, and carrying out of 

  the calibration of an electronic pressure sensor
- plotting the sensor output signal dependent on

  the pressure applied
- familiarisation with the design and operation of a

  piezo-resistive electronic pressure sensor
- familiarisation with the installation and connection

  of the pressure sensor
- information on applications, measuring ranges and

  accuracies of typical electronic pressure sensors

[1] calibration unit with dead-weight piston manometer and hand-operated spindle
[2] electronic pressure sensor with ceramic measuring cell, integrated amplifier and voltage output
[3] digital display for output signal
[4] additional pressure sensor as cutaway model
[5] set of weights
[6] transmission medium: hydraulic oil
[7] process schematic on front panel
Technical Data

Pressure sensor
- measuring range: 0...2,5bar
- supply: 24VDC
- output signal: 0...10VDC

Piston manometer with pressure piston
- diameter: 12mm

- number of weights: 5
- pressure graduations: 0,5-1-1,5-2-2,5bar

Digital display: 4 1/2 digits


Hydraulic oil: HLP ISO 32

Dimensions and Weight
LxWxH: 600x450x450mm
Weight: approx. 25kg
Required for Operation

230V, 50/60Hz, 1 phase or  120V, 60Hz/CSA, 1 phase

Scope of Delivery

1 experimental unit

1 set of weights

1 bottle of oil
1 cutaway model of pressure sensor
1 set of instructional material

Order Details
058.11000  IA 110  Calibrating a Pressure Sensor