Metrohm 796 Titroprocessor User Manual

Page 261

12. . Troubleshooting

Troubleshooting

796 Titroprocessor, Instructions for use

255

SYSTEM

SYSTEM 1:

Execution not possible while measuring

The selected function cannot be carried out while a method is running. Wait
until the method has ended.

SYSTEM 2:

Measuring start inhibited at this state

It is not possible to start a method while alterations are being carried out in
the method editor at the same time. Close the method editor.

TITRATION

TITRATION 1:

dosing drive not responding

The connection to the selected dosing drive has been interrupted during the
titration. Stop the determination, switch off the Titroprocessor and reconnect
the dosing drive. Switch the Titroprocessor on again.

TITRATION 2:

A/D converter error

The analog/digital converter of the sensor interface is faulty. Please contact
the service department of your local Metrohm agency.

TITRATION 3:

measuring point list overflow

More than 1000 measuring points have been recorded. An evaluation of the
further measuring points is not possible. Correct the control parameters of
the titration, see page 137 (DET), 145 (MET), 152 (SET), 159 (KFT), or 176
(MEAS).

TITRATION 4:

end-point list overflow

More than 9 equivalence points have been found. Further equivalence
points cannot be evaluated. Optimize the recognition parameters and, if
necessary, the control parameters of the titration, see page 139.

TITRATION 5:

max. number of measuring points reached

TITRATION 6:

end-point already reached

The set target end-point has already been reached at the start of the titra-
tion. An attempt may have been made to retitrate a sample which has al-
ready been titrated.

TITRATION 7:

no end-point set

No set target end-point has been entered for an end-point titration (SET,
KFT, SEC, KFC). Add the set target end-point to the method.