LABEC M-TIT-5 - Manual (Page 49)

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Pre- titration has found false
end point Setup of pre- titration
parameter is not suitable Set jump to "large" according
to 7.1.5
Mode titration is not right
a. find false end point
b. can't find end point a. pre- titration has found false
end point
b. mode is selected by mistake
a. turn off the false end point
according to 7.3.7
b. select the correct titration
mode
Preset end point titration is not
right
a. when over two end points,
after parameter is set,
titration can't be made
b. when titrating, display
"pre-controlled point setup
is not right"
a. parameter is set by mistake
b. parameter is set by mistake a. set the correct parameter
according to 7.2.3
b. set the correct pre-
controlled point according
to 7.2.3.
Stirrer doesn't work a. stirrer is not connected
b. stirring is set by mistake
c. stirrer is damaged
d. stirring drop has not been
put in the beaker
a. connect the stirrer according
to 1.2e in chapter IV
Operation of the Meter
b. speed up the stirrer
according to 10.1
c. change the stirrer
d. put stirring drop in the
beaker
There is bubble in feeding tube Leak solution on the joint of
feeding pipe
Install feeding tube according
to 1.1 c in chapter IV
Operation of the Meter
Mechanical part does not work
normally Burette is not installed
correctly Install burette according to
1.1b in chapter IV Operation
of Meter
Electrode is calibrated by
mistake a. pH electrode's performance
is not right
b. buffer solution is made by
mistake
a. change pH electrode
b. make buffer solution again