LISST - 25 User’s Guide
22
Appenidix B: LISST-25X Reset Procedure
1.
Confirm that a Hard Reset is required by eliminating all other possible sources of problems such as cable
connections, dead main battery, or software conflicts.
2.
Connect Communications cable and start TFTOOLS communication program. Verify that there is no
response from the instrument. If a # prompt appears type ALT-R to restart the program. If # prompt is
present a reset will not be required.
3.
Remove connector endcap. Newer instruments have a small hole in the cover plate with a reset switch
located underneath. Older instruments will require the removal of the cover plate to access the backup
battery connector. If required remove the cover plate.
4.
Install new batteries into battery holder. Insert battery pack. Verify that there is no response from the
instrument. Press and hold the reset button. If not reset button is installed, disconnect the two-pin
backup battery connector on the edge of the main PC board.
5.
While holding the reset button down remove the main battery pack. Wait 30 to 60 seconds and then
power up the system again by inserting the battery pack. After about 20 to 30 seconds the standard
Display Status message should appear. After the standard message appears the reset button can be
released (or the backup battery can be reconnected).
Key Points:
•
The power must be ON BEFORE the reset switch is pressed or the backup battery is
disconnected.
•
There must be time between power down and power up for any residual charge on the
circuit to dissipate.
•
Upon power up from a hard reset it will take about 30 seconds before the standard message
appears in the Terminal Window.
6.
After a Reset the parameters will return to default values. These include the time/date, samples per
average, and calibration constant. The internal pointers to the data storage memory are also affected.
The following steps MUST be performed before the instrument can be used.
7.
To reset internal variables to their correct values a soft reboot must be performed. From the L25<<
prompt type RB and press enter. This will reset all of the values to factory settings.
8.
Determine if the data previously stored in memory has been downloaded. If there is no data to download
continue to the next step. If the data has not been downloaded it will need to be downloaded using the
TFTOOLS program. Start the TFTOOLS program. Make sure the LISST-25 Windows software is not
running. The L25>> prompt should currently be displayed and respond to commands. Type ## and press
enter to bring up the # prompt. From the
TattleTale
menu select
XMODEM offload
. A box showing the
suggested number of bytes to download should appear. To compute the number of bytes to download
multiply the number of samples by 36 to obtain the total number of bytes to offload. Enter this number in
the box. Select OK to bring up a File name dialog box. Choose a file name and press OK to download
the data. Status of the download should be displayed on the screen. After downloading the data select
Run
from the
TattleTale
menu to restart the program. The standard display should be appearing on the
panel.
9.
After downloading the datafile we will need to erase the datafile to reset the Memory pointers. This can
be done by using the Erase button of the Tattletale.
Note:
Executing the Erase Datafile command only
resets the memory pointers to be beginning of the datafile. It will not physically remove the previous
data. The data can be offloaded again until new data is stored to that location.
