Microlab PRO-1 User Manual download pdf (Page 57)

GPX Pro 52

good signal from the satellites, "Date/time N/A" (not available). As soon as a good signal is

acquired, the display will update to the current date and time.

1.9.7 Battery and Charging

The internal Li-Ion battery, when fully charged, will usually power the device for about 4-5 hours.

(This time may be shorter due to excessive use of the backlight or the tach lights.)

The battery is charged whenever the device is connected to a 12V source through the external

cable, or whenever it is connected via the USB port.

A full charge takes about 8 hours.

When connected to USB, the GPX will not automatically power down.

You may use any USB charging device (e.g., cigarette lighter, plug-in wall transformer) to charge

the GPX that is capable of supplying 400 milliamps (ma) of current.

On the default main screen, you will see a battery status indicator. When the GPX is powered by

battery alone, the display will show an approximation of battery charge left (100% = fully charged,

0% = completely discharged).

When the GPX is powered by either a USB connection or a 12V vehicle connection, the display will

show the approximate charging voltage to the battery. The GPX is generally pretty close to fully

charged when that voltage is around 4.0V.

1.9.8 Powering Down

The device does not power down if connected via USB only (i.e., no 12V present). Therefore, the

internal battery will be continually charged while plugged into USB.

1.9.9 Memory

Each captured session uses several “directory entries”. If there are not enough available directory

entries to store another session, a message will be displayed each time you go to the main

screen.

Also, the main screen shows information on the amount of memory available -- % free, and

minutes free. The percent free is the actual percentage of memory that is available and not in

use. The “minutes free” is the approximate number of minutes of racing time that the timer will

store based on the current data acquisition sampling rates.

1.9.10 File Maintenance

The GPX stores all of its session data, and other information like tracks and settings, in "files" in

its internal flash memory storage. (The GPX contains approximately 8 megabytes of flash

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Microlab PRO-1 User Manual Page 57