MY ETREX DOES NOT MEASURE
HI,Garmin eTrex GPS Receiver is one of Garmin's hand-held GPS (global positioning system) personal navigator receivers. Its navigation features include waypoints, tracks and routes. A trip computer can display current speed, average speed, maximum speed, direction of movement, bearing and other details. Problems with the eTrex can include the device not turning on, issues getting a location fix, the arrow on the screen not pointing toward the destination, and coordinates issues.
Things You'll Need
* New AA batteries
Replace the AA batteries if the Garmin eTrex GPS Receiver. Turn the device over and remove the battery compartment cover. Remove the old batteries and discard them properly. Insert the new batteries, ensuring that the polarity is correct. The plus and minus signs on the batteries must match those indicated on the eTrex.
Move to an open location if the eTrex can't get a location fix. The eTrex uses signals that it receives from satellites. It needs to be in line of sight to them. Avoid using the device in parking structures, dense foliage or deep canyons. If you find it hard to see the sky, then the Garmin eTrex GPS Receiver does, too.
Keep moving if the arrow on the navigation page doesn't point toward the destination. Unlike a magnetic compass, a GPS receiver needs to constantly update itself to know which way you are moving.
Verify that the Garmin eTrex GPS Receiver is using the same position format and datum as the map you are using if the Garmin eTrex GPS Receiver coordinates don't match that of your map. Press the "Page" button and switch to the "Menu." Select "Units," and then "Position Frmt." You can also change the map datum by selecting, "Map Datums." The correct map datum to use should be printed on your map in the title block.
Good luck...