User's Manual
Table Of Contents
- Welcome
- Getting Started
- Helmet Mounting Locations
- Calibrating Your Device
- Setting Up Device For Individual Use
- Setting Up Device For Team Use
- Starting a Session
- Uploading Your Data
- Viewing Your Data
- Exporting Your Data
- Technical Specifications
- Operating Temperature
- Wireless Range and Frequency
- LED Status Indicators
- Service and Support
- Warranty
- Compliance Information
T h e G F T U s e r ’ s G u i d e P a g e | 8
contaminants. The fastening method is a semi-permanent installation. The GFT is not
recommended to be removed on a daily basis.
1. APPLICATION PRESSURE
Bond strength is dependent upon the amount of adhesive-to-surface contact developed. Firm
application pressure develops better adhesive contact and thus improves bond strength. Apply
tape to first surface and apply very firm pressure. Then apply the tape to second surface and
apply very firm pressure.
2. APPLICATION TEMPERATURE
Ideal tape application temperature is 21° C (70°F to 100°F). Initial tape application temperature
to surfaces at temperatures below 10°C (50°F) is not recommended because the adhesive
becomes too firm to adhere readily. However, once properly applies, low temperature holding
is generally satisfactory.
3. DWELL TIME
After application, the bond strength increases and approaches ultimate bond strength after 72
hours at 21°C (70°F). Typical bond strength build-up: 20 min equals 50% bond strength, 1 hour
75% bond strength, 1 day equals 90% bond strength and 3 days equals 100% bond strength. In
some cases, bond strength can be achieved more quickly by exposure of the bond to elevated
temperatures ie 66°C (150°F) for one hour. This provides quicker and more thorough adhesive
wet-out onto then substrates.
IMPORTANT: Although the electronics of the GFT are encased in a ruggedized
package and can measure extreme impacts, the fastening method may not
withstand severe direct impacts especially in cold weather. The device can
separate from the helmet. Adapter pieces are available to mount the GFT to the
exterior of helmets to provide a more secure method of mounting. It is
recommended to mount the GFT on the inside of helmets at all times unless an
adapter piece is used.
Helmet Mounting Locations
The following diagrams show where the GFT can be mounted. A football helmet is shown as an
example. Use this as a guideline for other types of sport helmets. Mount the GFT in a location
where the USB cable can easily be plugged into the unit. If the GFT is mounted in the inside of
the helmet, ensure it does not interfere with the helmet padding and the USB cable can be
easily plugged into the unit. The following are examples of multiple mounting locations for the
device.