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Technical details |
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Below you will find information on the technical details of the necessary equipment.
Minimum requirements for the PC or laptop are:
- 2 USB ports
- Windows 95 or higher
In order to carry out your own measurements you will need one or two Interface Pressure measurement mats. Currently there are several makes of interface pressure mats available commercially, such as Tekscan, Xsensor and FSA.
Depending on the type of mat that you have, you will receive the necessary software from us, as long as this is available for the type of pressure mat you have. Then you can let your pressure mat(s) communicate with the SMS Analysis software that we have especially developed and tested.
It is important for us to know the type, distribution year and serial number of your interface pressure mat. If you use the contact form to send us this information, we will be able to provide you with the correct information.
If you do not already have an interface pressure mat and wish to acquire one, you can contact us for advice. Please fill in the contact form and we will then get in touch with you.
You can carry out the measurements using either one or two pressure mats. A pressure mat can be placed either under the buttocks or against the back. If you use two mats, you can measure the pressure distributing capacity of both the seat and backrest supports under load, simultaneously. It is entirely up to you whether you use one or two mats.
If you wish to carry out your own measuring sessions, you will need software to enable SMS Seating Advice and to allow the SMS Analysis software to communicate with your interface pressure mats. We will assist you to get the software up and running.
| 4. Case with measuring instruments |
In order to measure the seating angle and the functional backrest inclination under load, you will use the case with instruments. This case contains SMS Seating angle bracket, the SMS Backrest inclination strip and the digital spirit level.
The sitting posture angles – the seat angle, angle φ and the functional backrest inclination, angle (φ+α) – are defined along the relevant parts of the body when under load. This means that they must also be measured ‘under load’ and along the body. For this purpose we have developed two simple measuring aids:
- With the aid of the SMS Seating angle bracket, the seat angle, angle φ can be measured.
- With the aid of the SMS Backrest inclination strip, the functional backrest inclination, angle (φ+α) can be measured under load. The instrument consists of a metal strip, bent in such a manner that three sections are formed. The end sections are parallel to each other and the middle section is at an angle of 165° to both of them.
- The digitale spirit level can be used to read off the values of the angles accurately.
If you would like more information about the measuring instruments and their use, download the document ‘Manual of definitions and methods for measuring sitting posture and pressure distribution’ under the heading ‘Downloads’ to the right of this page.
Size and weight of the case: 45x32 cm, 1050 grams
Size and weight of the SMS Seating angle bracket: 23x20 cm, 325 grams
Size and weight of the SMS Backrest inclination strip: 53x3.5 cm, 155 grams
Size and weight of the digital spirit level: 33x6 cm, 365 grams
The digital spirit level has an accuracy of one hundredth of a degree.
A 9V battery is included with the digital spirit level.
The various instruments are available both separately and in the total package as a case containing the measuring instruments.
You may also choose to make the SMS Seating angle bracket and the SMS Backrest inclination strip yourself instead of obtaining them from us. You soon will find the technical specifications for these two measuring instruments under the ‘Downloads’ link.
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