Chapter 6 The 2277 Tablet Computer
6-7
CALIBRATING THE TOUCH SCREEN
If the tablet does not seem to recognize your stylus taps, you may need to recalibrate the touch
screen. To do this, close or minimize the DFDC program by tapping the icon in the lower right
corner. See the picture near the top of page 6-5. This will show you the Desktop. Double-tap
the Shortcut to Control Panel, then Double-tap “Stylus”. Tap the “Calibration” Tab, then tap
“Recalibrate”. You will see a “+” sign in the middle of the screen. Carefully press and briefly
hold the stylus on the center of the plus sign. Repeat this 4 more times as the target moves
around the screen. After you have successfully calibrated the touch screen, the screen will be
blank, without any “+” signs. To close the calibration window, tap anywhere on the screen.
Your touch screen is now recalibrated. Close all open windows and either reboot the tablet or tap
the DFDC6.0 icon at the bottom of the desktop screen.
TEMPERATURE RANGE
If you must operate in extremely hot or extremely cold conditions, the Dipstick itself will operate
properly under pretty much whatever temperature range you can stand, but the tablet computer
may not function properly at extreme temperatures. The tablet’s working temperature is listed as
32° - 122° F or 0-50° C. There are several ways to collect data at extreme temperatures:
Collect data normally and take frequent breaks in a very warm (or very cool air
conditioned) space. If the temperature is cold, but not bitterly cold, (or if it is hot but not
blistering hot) you can operate normally. The computer’s screen is the first thing to stop
working at extreme temperatures. If it is very cold, the screen will gradually turn white
and you won’t be able to read it. If it is very hot, the screen will gradually turn black and
you won’t be able to read it. But if the Dipstick still beeps when you turn it, the Dipstick
is still collecting data, and the data will be good. When you have finished the Run, take
the Dipstick back to your truck or to a heated or air conditioned space. The screen will
appear in a moment or so after you re-enter a space that is at normal temperature.
Put a lightweight clear bag over the tablet, and put one or two “handwarmers” into the
bag. You can buy these lightweight chemical handwarmer or pocket warmer packets that
you shake to activate at convenience stores. They do not get very hot but they do get
pretty warm. If you throw a couple of these into the bag, then seal it up with duct tape or
similar so the warm air cannot get out, the computer won’t get very cold and will still
display properly. Use a lightweight flexible bag so you can use the touch screen and
virtual keyboard through the bag.
Collect data manually. This is your last resort, because it’s more work, but since the
Dipstick will operate properly at extreme temperatures where the computer will not work,
you can always do this even in very extreme conditions. Just read the numbers on the
Dipstick windows and either write each reading down or read them into a pocket recorder.
Be sure to read the minus sign if appropriate and speak clearly if you use a recording
device. Later, someone will need to create Runs from this data using the RoadFace
program as described in Chapter 5.
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