Holux m-241 Manual Do Utilizador

HOLUX Wireless GPS Logger M-241 User’s Manual 
 

 

37

Weak or no GPS signal at the 
place of M-241 

Test under an open sky at a fixed location 
and run the Mini GPS Viewer “Cold start” 
function. 

No GPS 
output but 
GPS timer is 
counting  

The ephemeris and almanac data 
in the GPS memory are no longer 
valid after an extended period of 
nonuse. 

Remove the Battery for 120 seconds and 
re-insert, then power on to test again.   

T

his operation is the same as “Cold Start”.

Bluetooth 
execute fail 

Bluetooth function unstable 

Power On/Off M-241. 
Re-Start PDA or PC and refer to section 
10 “Bluetooth device connection 
installation” to re-connect. 

Cannot open 
the COM port 

Bluetooth connection interrupted 
or COM port is conflicted/occupied 
by other programs. 

Check the Bluetooth connection again, 
Check and close other programs that 
might conflict with. 

No display 

Battery low 

Please check battery. 

No acquisition 

Please move to open sky to reacquisition.

Log mode is by distance, so it 
won’t record if no movement. 

Change log mode to “by time” 

Logger 
function on, 
but no POI 
recorded 

log mode is by long interval 

Ensure you interval setting meet your 
situation. 

Velocity and 
position 
shifting when 
static 
 

Because the satellite signal may 
be shifted easily due to the 
interference when the moving 
speed is less than 10 km/hr or 
under the environment with tall 
buildings that the satellite signal is 
not good, 

It’s a GPS character , just move to open 
sky area to get better GPS signal.   
 
 

Logger 
function can’t 
work 

When device is suddenly shut 
down in flash memory erase 
process, the initial process of flash 
will be failed.   

Power on again to erase.