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for the civil engineering industry

Building better technology
for the civil engineering industry

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Using Clisp Studio Part 1

Mar 10 2014

Clisp Studio Software has been developed to perform quickly and efficiently in the most demanding geotechnical laboratories. At VJ Tech, all of the Clisp Studio modules have a simple and quick installation process along with a test assistant to take the user through everything from set up to results.

Our Clisp studio can be used in conjunction with displacement transducer calibration. We would like to introduce to you its innovative facilities that are available.


Using Clisp Studio Part 1–Displacement Transducer Calibration

The following elements are required: 

• The Calibration Certificate for the Displacement Transducer 

• CLISP Studio has been launched and is running

• The Instrument to which the Transducer is connected has been added in CLISP Studio

• The Channel Name, Serial Number (if required), applicable Units and the decimal accuracy have been set up

VJ Tech’s test equipment supports two types of calibration, Single Factor and Dual Point Calibration.


 

How To - Single Factor Calibration

Calculate the Single Factor value using the Maximum Displacement (mm), Sensitivity (mV/V) and Supply Voltage or Excitation (V) values from the Calibration Certificate of the Displacement Transducer as follows;

 

Single Factor  =          Maximum Displacement (mm)      |(mm)/mV.

               Sensitivity (mV/V) x Supply Voltage (V)

·       Select the ‘Inputs’ tab from the Instrument’s Main screen

·       Click on the required channel to display the setup window as shown below

 

·       In order to enable editing of the Calibration Parameters, press ‘Edit’ and enter the pass code.

·       Select the ‘Single Factor’ and input the calculated Single Factor.

The ‘Filter’ value is normally left at 20 – the optimum value to remove unwanted noise from the signal.

 

The ‘Gain’ setting is important and must be set such so that the input signal produces enough divisions to ensure that it may output at least the number of divisions required for the decimal accuracy of the Displacement range.

 

The following table gives the Gain values for different Displacement Transducers for the recommended resolution of 0.01mm.

 

Displacement Transducer

Recommended GAIN

10 mm

2

25 mm

8

50 mm

16

 

To reset the channel calibration:

• Select ‘Clear’. 
• To send the input information to the Transducer, select ‘Write’
• Select the ‘Zero’ button to reset the Display to 0.

As the Displacement Transducer is moved between the zero and maximum positions, the Display will reflect the Displacement accordingly. The following shows the input values and the maximum Displacement reading. 




How To – Dual Point Calibration


• Set up the Displacement Transducer in the Displacement Calibration Reference Device.

 

 

 

• Navigate to the channel page in the same way as before.

• Select the ‘Dual Point’ radio button 

• Set the ‘Zero’ field to the lowest Displacement reading (usually 0)

• Set the ‘FSD’ (Full Scale Deflection) field to the Maximum Displacement obtained from the calibration certificate (in this example 25.74mm)
 
The ‘Filter’ value is normally left at 20 – the optimum value to remove unwanted noise from the signal.
 
The ‘Gain’ setting is important and must be set such that the input signal produces enough divisions to ensure that it may output at least the number of divisions required for the decimal accuracy of the Displacement range. This table gives the recommended Gain values for different Displacement Transducers for a resolution of 0.01mm.

 

Displacement Transducer

Recommended

GAIN value

10 mm

2

25 mm

8

50 mm

16

 

To reset the channel for calibration:

• Select the ‘Clear’ button
• Select ‘Write’ button - this will send the input information to the Transducer.
• With the Displacement Transducer at its zero position click the ‘Zero’ button and the Display will reset to 0.00

• With the Displacement Transducer at its maximum position in the Reference Device, click on the ‘Gain’ button and the Display will reset to the FSD Value

 

• If the Displacement Transducer is now moving between the zero and maximum positions, the Display will reflect the displacement accordingly


 

Find Out More At VJ Tech

We are leading experts in supplying you with the most excellent standard of test equipment for the civil engineering industry.

If you require more information about Clisp studio software or have any enquiries then please visit our brochure website or call us on +44 (0)118 945 3737+44 (0)118 945 3737.


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