Operating manual

GP Manager

Version 7.3.4

Module: GP FussDruck / GT Radix

With the GT Radix pressure measurement system, you can record the plantar pressure load in the shoe.

The data from the sensors is sent directly to the PC via Bluetooth and stored there, allowing your customer to move freely. Depending on the shoe size, the flexible measuring soles have 40 to 64 sensors per sole. The maximum measuring frequency is 200 Hz and the resolution of the measured values is 12 bits, so that sporting movements can be recorded with a high degree of accuracy. The range of the measuring distance varies between 15 metres inside buildings and around 100 metres in open spaces. The measuring surfaces of the systems can be customised. Customised designs for special applications such as butt, Charcot or crescent bases are possible. The measuring surfaces are repairable and can be calibrated again and again, guaranteeing a long service life.

The target user group for the systems is not made up of end users, but of specialist groups (engineers, orthopaedic (shoe) technicians, biomechanics specialists, etc.) from the various sectors:

• Orthopaedic (shoe) technology
• Sports biomechanics
• Automotive industry
• Mattress industry
• Seating industry

The user of the GeBioM pressure distribution measuring systems is always given an intensive introduction when the systems are delivered, usually even on site. This includes basic handling of the systems, exclusion criteria for certain measurement situations (e.g. do not use sharp objects, etc.) and an introduction to the evaluation options of the respective system. The specialist knowledge required to analyse the results can be assumed. The devices cannot be used contrary to their intended purpose according to normal judgement. The measures taken by the user based on the respective measurement results are always subject to his personal expertise and philosophy.

The systems are designed in such a way that the respective test person (in industry usually employees of the respective department, in sales counselling the customer, in orthopaedic (shoe) technology the customer/patient) is not significantly influenced by sitting on or walking on the measurement sensors. Where necessary, the measurement technology is also applied to the test subject by the professional user. Otherwise, the test person simply walks over the measuring field, lies on it or wears the measuring foils in their shoes.

Important:          Care must be taken to ensure that the measuring foils or sensors are not damaged by sharp objects.
objects. This could cause the sensor system to fail.

GeBioM recommends regular calibration of the measuring foils or sensors by the manufacturer, at least once a year. If the systems are used almost daily, this should be repeated more often. In the case of industry, however, this can also be carried out by an appropriately equipped and instructed specialised laboratory. Due to the special calibration procedure, instructions are required. The manufacturer should be consulted for this.

• Measuring soles (5 pairs as standard)
• 2x GT Radix transmitter
• 1x USB-C charging cable
• 1x CEBO Connect Stick
• 2x leg straps
• 1x transport case

Both transmitters must be charged before using them for the first time. Charge the devices with the enclosed USB-C cable. Attention: Apple Chargers do not work!

During the charging process, the charging LED lights up green continuously. When the battery is fully charged, the charging LED flashes green and the cable can be removed.

Attention: If the charging LED lights up red or flashes red, remove the charging cable immediately and contact the manufacturer!

The device is active after the first charging process. The status LED flashes orange. The status LED flashes at different speeds depending on the status of the device.

• Flashes 1x every 10s -> Deep sleep mode
• Flashes 1x every 3s -> sleep mode
• Flashes 2x -> Device is paired
• Fast flashing -> Data transmission

Thanks to the Bluetooth low-energy technology the battery life is usually several weeks/months. During the measurement, the battery status is displayed in the LIVE preview. The device switches to deep sleep mode when not in use to save power. It is not necessary to switch off the device as it has an extremely low power consumption in sleep mode. It is only possible to switch off the device by removing the battery, which we strongly advise against!

As with conventional lithium-ion batteries, it is not necessary to constantly charge the battery to 100%. A capacity between 40-80% is optimal. Even if the device is not used for several weeks.

Only rechargeable batteries of type 16340 RC123A may be used. Please contact the manufacturer if you wish to replace the battery!

1. Insert the supplied CEBO-Connect-stick into a USB socket on your PC
2. Both channels, the first-time use, connect it to a USB-C charger and thus activate it (Attention: No Apple charger!).
3. Status LED of the transmitter now flashes green
4. Connect the measuring soles to the transmitters. Pay attention to the correct labelling (L= left; R= right).
5. Attention: Make sure that the plug engages correctly!
6. Place the soles in the shoes (white side up)
7. Slide the transmitters into the loop of the leg straps supplied and attach them to the customer's lower leg. The cable should not be under tension.
8. Now open the already installed GP Manager and start a measurement in the GP foot pressure module

To start the module from the start page, you must first select a customer or create a new one. To do this, please click on the following symbol in the top right-hand corner . To create a new customer, click on   and fill in at least the mandatory fields (*). Via the arrow to return to the start page and start the GP foot pressure module.

This takes you to the user interface of the measured value recording module. This module is used to record measured values from the connected GeBioM hardware and process measurements. A new measurement is started by clicking on "Measurement".

On the display area of GP FootPrint the gait patterns are displayed after a measurement or after opening a measurement. However, the measurements of other measuring surfaces (e.g. hand, arm, etc.) can also be displayed. With a click on older measurements of the customer can be selected.

The force-time diagram is located below the display area. In it, the total force is plotted as a function of time. The total force of the left foot is shown as a red line and that of the right foot as a green line.

A simple left mouse click in the diagram selects a point in time and displays the respective pressure distribution image in the display area. The selected point is indicated by a black vertical marker. At the same time, the current force values are displayed in the "Current [N]" line in the force display area. The selected point in time appears in the top right-hand corner of the diagram.

If you move the marker while holding down the left mouse button, a "quasi real-time" display of the gait pattern is shown. The right or left arrow key on the keyboard offers another option for scrolling through the gait pattern. The scrolling direction corresponds to the arrows.

You can also zoom in on a specific area of the diagram. To do this, press the CTRL key and simultaneously drag a rectangle with the mouse (left mouse button) over the area to be zoomed. The entire measurement is displayed again by left-clicking while holding down the CTRL key.

Click on the "Change page" button to change the active zone (red rectangle) of the display area. Another way to change the active zone is to click once with the left mouse button in the corresponding zone.

If a measurement has been zoomed in the force-time diagram, the remaining part of the measurement can be deleted using the "Cut" function, i.e. only the part of the measurement that is currently visible is saved. The function is carried out without prompting, so it should be used with caution.

After clicking on "Info", you can enter information on the data record in a dialogue box, which is displayed in the display area.

The information is entered in the text line and displayed directly in the respective display area by clicking on "Apply". After clicking on "Cancel", the entry is discarded.

AttentionIf you have opened the dialogue and do not want to change the entry, click on "Apply".

To compare two measurements with each other, you must first select a data set for comparison. To do this, click on the button - This is located to the right of .

You can select a comparison measurement in the following preview window:

Select a comparison measurement by clicking on it. Now confirm this selection with the "Select" button.

To see the selected comparison, you must tick the checkbox before the comparison. If you deactivate the checkbox, you will return to the initial measurement.

In the default setting, hydrographs are displayed in the form of isobars. This graphic shows the uniform pressure distribution. The "Isobars" radio button is activated.

After activating the "2 D" radio button, gear images are displayed in the form of colour fields.

The "3 D" radio button causes a change to a 3D print image. Please note that this only applies to the gait pattern of the active zone (red rectangle). The "Change side" button retains its function, so that a quick switch to the other measured foot side is possible with a simple mouse click.

You can view the measurement from different perspectives by clicking in the workspace and rotating the measurement while holding down the left mouse button. The direction of rotation is determined by the following key combination and mouse movement:

Key combination Mouse movement Direction of rotation

Left mouse button horizontally around the y-axis

right mouse button vertically around the x-axis

By moving the mouse vertically while holding down the CTRL key, the print area is raised or flattened. This function can be useful when preparing a printout.

After activating the "Impulse, force, force rate" radio button, gait patterns are displayed in the form of force-time diagrams. All defined zones are taken into account. In addition, an overall force curve (grey here) is displayed.

The diagrams are based on one step each (right and left). The step that comes closest to the average contact time of all steps is displayed.

Common to all diagrams is the visualisation of the relevant biomechanical parameters:

• Pulse [Ns]
• Force [N]
• Force rate [kN/s]
• Time [s]

The "Maximum values" checkbox causes the maximum value for each foot zone to be displayed.

Zone definition

It is now possible to edit the zones manually. This function is only possible if the axis is set, or in other words, if the "Axis" box is not ticked. All changes made on one foot side are automatically transferred to the other foot side. Operation is carried out by holding down the Ctrl key. There are several options:

• Change an existing zone
  • click on the zone to be changed while holding down the Ctrl key and change the size of the zone at the corner or side points with the mouse, or change the position of the zone while holding down the mouse button in the zone
  • double-click in the zone while holding down the Ctrl key to open a new window (see Figure 12). Here you can enter the name, move the sliders to change the colour and enter the coordinates to change the size and position of the zone.
• Define a new zone
  • A window can be opened by holding down the Ctrl plus Shift key. This is then a new zone and can now be edited in the same way as under 1.) "Change existing zone".

If a change has been made under 1.) or 2.), the option "Save zones" appears (see Figure 13). The changed zone can be overwritten there or a new zone can be created. In the latter case, a new name must be entered for the zone. By clicking on "Zone definition", you can select from the list of already created zones (see Figure 14). The selected zone categorisation is displayed graphically and it is possible to delete a previously defined zone categorisation.

By activating the "Zones" checkbox and selecting an associated parameter "Max. pressure", "Aver. pressure" or "Bel. Area", the corresponding values of the zones are displayed on the work surface.

A distinction must be made here as to whether the values for a specific point in time (time diagram) or the specific areas "Max. pressure", "Average pressure" or "Bel. Area" should be displayed.

By activating the "Chart" checkbox, a chart is shown in the measurement display. The pressure centre is calculated at every point in the measurement. This is marked as a point in the dynamic progression. The hydrograph therefore represents the connection of the pressure centres of all individual images and is to be interpreted as the point of application of the body's centre of gravity.

When the Comparison option is activated (click on ..., select comparison measurement, tick the Comparison box), the "Basic analysis" and "Professional analysis" boxes become active. These provide a comparison of the measurement data for the two measurements displayed. After clicking on one of the two options, a table appears at the bottom of the screen in which various measurement data are compared with each other.

The basic analysis is divided into rearfoot and forefoot. The maximum pressure and impulse parameters are listed next to each other and the percentage deviations of the compared measurements are calculated.

The professional analysis is divided into all foot zones (standard - 6 zones). The parameters maximum pressure, average pressure, loaded area, impulse, force and force rate are listed next to each other and the percentage deviations of the compared measurements are calculated.

A player function is inserted at the bottom right of the control panel. This ensures that the dynamic measurement runs automatically. Clicking on the ">" play button starts the measurement automatically. When the measurement is running, a vertical line moves across the force-time curves at the bottom of the screen. Clicking the play button again stops the process and the vertical line remains at the corresponding position. As before, it is also possible to run the programme manually using the mouse or the cursor keys. By changing the percentage next to the player functions, it is possible to slow down the sequence from 30% to 100%. If the automatic sequence is paused, the measurement can be switched forwards and backwards in individual frames using the two arrow keys next to the play button.

The scaling of the legend can be changed manually by clicking on the arrows below the colour scale. However, the entire scaling can also be changed. Clicking in the unit field, for example (default setting "N/cm²"), takes you to the "Definition legend" menu.

The following functions are used to define new legends, or predefined legends can be called up and changed. Predefined legends are selected via the list field. If you click on the arrow in the list field, the available options are displayed.

After clicking on "New", a new name "NN" appears in the list field. The new legend can later be found under this name in the list field. The name can be changed by clicking with the mouse in the "NN" field and entering a new name.

To define the colours, set the slider below the colour scale to the desired number of colours. This is displayed in the centre below the scale. You can set values between 1 and 64. Each individual colour must now be defined. To do this, double-click in the colour field to be defined and the Windows colour dialogue box will appear. Click on the desired base colour on the left. If required, this can be varied manually on the right in the square colour spectrum or in the brightness gradation next to it. The current colour is displayed in the "Colour / Base" field. Once the desired colour has been set, click on "Add colour". Make sure that the colour appears in the top left box under "User-defined colours", otherwise the colour will not be applied. Then click on "OK" and the colour will be entered in the colour scale. You must repeat this process for each colour box (or see "Calculate").

The "Calculate" function is used to create a colour transition scale, i.e. after creating a start and end colour, the intermediate colours are calculated and entered by the program. To do this, define the start and end colours as described in the "Colours" section. Then click first on the start colour and then on the end colour while holding down the CTRL key. The colour values between the two boxes are calculated automatically.

You can use the "Font" button to change the colour of the text in the legend. This is done after clicking on it as described under "Colours".

The "Background" button is used to set the background of a measurement. This is done after clicking on it as described under "Colours".

If the "Auto scaling" checkbox is activated, the scaling is set to the maximum value. If the checkbox is deactivated, the scaling is set to the last set value.

In the "Units" area, select the pressure units (mbar, N/cm², kPa or mmHg).

Note:         The displayed list also contains the units for the impulse [Ns] and [mNs]. Make sure that these units are not selected for the pressure.

Click on "Save" to save the new settings. If you want to discard the changes, click on the crossed rectangle at the top right of the dialogue box.

1. Select the "Customers" button on the start page and create a customer or search for an existing customer
2. Use the arrow at the top right to accept customers and return to the start page
3. Open GP foot pressure module
4. CEBO-Connect Stick plug into the USB port of the PC
5. Both channels, the first-time use, connect it to the enclosed USB-C charger and thus activate it (Attention: No Apple charger!).
6. Status LED of the transmitter now flashes green
7. Create measuring system for customers
   1. Soles in the shoes
   2. Attach the transmitter to the lower leg with leg straps
   3. Connecting transmitters and soles
8. In the FootPressure module, select the GP MobilData measuring system and click on "Measurement".
9. When the programme is started for the first time, the calibration data for both soles is read in automatically - this can take a few minutes. An internet connection may be required for this.
10. You can then start the measurement by pressing the "Start measurement" button
11. Measurement data is recorded until the "Accept measurement" button is clicked
12. The measurement is accepted and displayed