Metrohm 888 Titrando User Manual download pdf (Page 41)

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6 Troubleshooting

888 Titrando

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Problem Cause Remedy

2. Remove and clean the exchange unit (see

the chapter in the manual for the exchange

unit, "Care and upkeep").

3. Contact your local Metrohm Service

department if necessary.

The data of the exchange

unit can no longer be read.

The data chip is damaged,

either mechanically or by

chemical action.

￭ Contact your local Metrohm Service

department to have the data chip replaced.

￭ If necessary, remove the data chip yourself

so that the exchange unit can continue to

be used in the meantime.

6.2 SET titration

Problem

Cause Remedy

The titration will not

be finished.

The minimum dosing rate

is too low.

Select the user-defined titration rate and

increase the minimum rate (see manual/help of

the software used).

The stop criterion is unsuit-

able.

Adjust the control parameters (see manual/

help of the software used):

￭ Increase the stop drift.

￭ Select a short delay time.

The sample is over-

titrated.

The control parameters are

unsuitable.

Adjust the control parameters (see manual/

help of the software used):

￭ Select Titration rate = slow.

￭ Select the user-defined titration rate and

increase the control range.

￭ Select the user-defined titration rate and

reduce the maximum rate.

￭ Select the user-defined titration rate and

reduce the minimum rate.

￭ Stir faster.

￭ Arrange the electrode and buret tip to an

optimum.

The electrode responds too

slowly.

Replace the electrode.

The titration time is

too long.

The control parameters are

unsuitable.

Adjust the control parameters (see manual/

help of the software used):

￭ Select Titration rate = optimal or fast.

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