Morita DENTA PORT ZX, Operation Instructions Manual, Page: 28 / 36

Operation 2018-10-21
Page24
10. Troubleshooting
If the equipment does not seem to be working properly, the user should first try to inspect and adjust it himself.
* If the user is unable to inspect the instrument himself or if the instrument fails to work properly after being
adjusted or after parts are replaced, contact your local dealer or J. MORITA OFFICE.
Problem Check Points Response
No power
Check battery installation.
Check battery power.
Install batteries properly.
Replace batteries.
Cannot make a
Measurement.
Check cord connections.
Check probe cord for broken wire.
Check that all connections are properly
secured.
Touch the contrary electrode to the file holder
to check probe cord conductivity.
No alarm sound Check if sound is turned off. Turn the sound on.
Cannot switch memories
Cannot change memory
settings
Is a measurement being
performed?
Does the switch work?
Switches do not work during taking
measurement.
Switch may be broken.
Display does not appear.
Is there a sound when the unit is
turned on and off? Replace batteries if there is no sound. Broken
display if there is a sound.
Canal Length Indicator is
unstable.
Is contrary electrode making good
contact with oral mucosa?
Is the file holder dirty?
Make sure the contrary electrode makes good
contact with the oral mucosa.
Clean the file holder with Ethanol for Disinfection
(Ethanol 70 vol% to 80
vol%).
Canal Length Indicator
overreacts or is too
sensitive.
(Measurements are too
short. Poor accuracy.
Erratic results.)
Is blood or saliva overflowing from
the opening of the crown?
Is the canal filled with blood, saliva
or chemical solutions?
Is the tooth surface covered with
cutting debris or chemical solutions?
Is the file touching the gingival
tissue?
Is there pulp tissue left inside the root
canal?
Is the file touching a metal
prosthesis?
Are proximal surfaces infected with
caries?
If blood or other fluids overflow the canal, the
current will leak to the gums and the meter
will jump to Apex. Clean the canal, canal
opening and tooth crown thoroughly.
The canal length indicator bar may suddenly
swing when it breaks the surface of fluids
inside the canal, but it will return to normal as
the file is advanced down toward the apex.
Clean entire tooth surface.
This will cause the canal length indicator bar
to suddenly jump all the way to the “APEX”.
Accurate measurements cannot be obtained if
a large amount of pulp tissue is left inside the
root canal.
Touching a metal prosthesis with the file
allows a flow of current to the gingival tissue
or periodontal pocket and will cause the meter
to jump to the “APEX”.
Current can flow through the caries infected
area to the gums and prevent an accurate
measurement from being made.