15
Filaments won’t Adjust from a Negative Number to a Positive
Number
1.
Check the Total Gas Units in the Logging Parameters window. If the Total Gas is
above 480 units then the MLogger is using the TCD filament only.
a.
Is there gas flowing through the detector? If there is, then the MLogger is using the
TCD filament and the CCD is turned off, this is a normal operation of MLogger.
b.
If there is no gas flowing through the detector, then follow the steps provided
here.
2.
This is the first indication that a filament has gone bad. Remove the problem filament
and replace with a new one.
Changing a Filament
Watch the video at
http://www.mudlogsys.com/downloads.html
1.
Open the MLogger up by unscrewing the thumbscrews and pulling on the front. It will
slide out from its case.
2.
Locate the filament in question on the
Red side
and unplug the ten-pin connector. Firmly
grasp the sides of the connector and pull. There are no clasps or latches holding the plug
in place.
3.
Use a small Phillips screwdriver to remove the screws holding the filament in place.
Remove the old filament.
4.
Insert the new filament and replace the screws. Replace the ten-pin connector.
5.
Adjust the Zero knob for the corresponding filament to see the signal voltage change. If a
filament is changed and there is still no adjustment, check to make sure the ten pin plug
on the filament is lined up properly and pushed on all the way. Look for any wire that
may have accidentally been removed while taking the plug off.
6.
Look in the MLogger just behind the front panel for the Zero Potentiometer (Pot). In some
cases the solder connections have worked loose. This is rare but has occurred. If there
are any loose solder joints then a soldering iron is required for this repair. Contact the
MSI office if this problem occurs.
MLogger Main Flow won’t Adjust Higher than 2 SCFH
1.
Check the Sample line coming from the gas trap, it may be blocked or broken. Remove
the sample line and see if the flow returns.
