Buchi KjelSampler K-377 Manual do Utilizador descarregar pdf (Página 83)

6 Operation

K-375/376/377 Operation Manual, Version B

6.6.4 Sequences

The Sequences button is only available if an auto sampler is present and conﬁgured under

Device  Settings  Peripherals  Sampler present

If the sampler has been installed and prepared properly, a sample series to be determined with a

one- or two-tray sampler can be deﬁned and pre programmed via a sequence.

A sequence contains a number of steps deﬁning the samples itself and the necessary system tasks

like preheating, priming, aspiration etc.

The following types of steps may be used within a sequence:

Step Explanation

Preheating The preheating procedure is performed according to the settings under

System Preparation  Preheating

Priming The priming procedure is performed according to the settings under

System Preparation  Priming

Rack 4 Enter the sample details for a four-place express rack. For a 2-tray sampler the tray position (A or

B) can be selected using the SETTINGS button within the step.

This step can be edited within the sequence.

Rack 12 Enter the samples for a 12 place rack. For a 2-tray sampler the tray position (A or B) can be

selected using the SETTINGS button within the step.

This step can be edited within the sequence.

Rack 20 Enter the samples for a 20 place rack. For a 2-tray sampler the tray position (A or B) can be

selected using the SETTINGS button within the step.

This step can be edited within the sequence.

Pause The sequence is stopped until it is continued by pressing Start.

This step cannot be changed.

Cleaning The cleaning procedure is performed according to the settings under

System Preparation  Cleaning

Aspiration The aspiration procedure for the sample tube and the receiving vessel is always performed, unless

the aspiration parameters of the referenced method are set to No. (In this case the sample determi-

nation will stop after the determination of the sample with the corresponding method.)

Dose H

3BO3 This step is thought for the protection of the electrode. 50 mL of boric acid are dosed to the

receiving vessel to keep the electrode immersed during non-usage of the instrument.

This step cannot be changed.

Standby The device is sent to Standby mode.

This step cannot be changed.

NOTE

The order of the steps can not be changed once they have been added to the sequence, but steps

can always be deleted and added again in a different order. The tasks Preheating, Priming, and

Cleaning are always performed “via sampler”, if used within a sequence. Even if those tasks are set

to “unit only” within the area “System Preparation” , this setting will be omitted.

Once started, all samples within a sequence are determined automatically one by one in the working-

order of the sampler. Each sequence will be deleted from the sequence list the following day, in case

all samples have been determined properly. Sequences containing faulty samples will not be deleted.

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