Metrohm 930 Compact IC Flex Oven/SeS/Deg User Manual download pdf (Page 94)

5.14 Servicing the detector

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930 Compact IC Flex Oven/SeS/Deg (2.930.2460)

Regenerating the adsorber material

Allow the depleted adsorber material to dry overnight in an oven at

140 °C. The dried adsorber material once again has the original color

and can be reused.

Two H

O adsorption cartridges are provided so that the H

O adsorption

cartridge can continue to work without interruption.

5.14 Servicing the detector

Follow the maintenance instructions in the the detector's manual.

5.15 Rinsing the sample path

Before a new sample is measured, the sample path has to be rinsed with it

long enough to prevent the measuring result from being falsified by the

previous sample (sample carry-over).

The time required to rinse the sample path with the new sample is called

the rinsing time. The rinsing time depends on the transfer time.

The transfer time corresponds to the time the sample needs to flow from

the sample vessel to the end of the sample loop. The transfer time

depends on the following factors:

￭ The pump capacity of the peristaltic pump or Dosino

￭ The total capillary volume

￭ The volume of the gas removed from the sample by the sample degas-

ser

The transfer time can be determined as follows:

Determining the transfer time

Emptying the sample path

Pump air through the sample path (pump tubing, tubing connec-

tions, capillary in the degasser, sample loop) for several minutes until

all liquid is displaced by the air.

Aspirating the sample and measuring the time

Aspirate a sample typical for the later application and use a stop-

watch to measure the time the sample needs to go from the sample

vessel to the end of the sample loop.

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Metrohm 930 Compact IC Flex Oven/SeS/Deg User Manual Page 94