Combi Flash 7650 Series Bedienungsanleitung PDF herunterladen (Seite 131)

Section 4 User Help Reference

4-51

for modules with flow cell windows stained by

compounds.

• Red – lamp energy is obstructed to a degree that the

module might not reliably detect peaks. If you attempt to

operate the module, peak collection will be forced to

collect all. This prevents diverting desired compounds to

waste.

Depending on what you are doing with the Manual Control

functions, low lamp energy could be a normal indication. For

example, a UV-absorbing compound could be present in the

flow cell as you are pumping solvent. Or, the selected solvent

absorbs UV light at 254 nm. Abnormal indications could be a

flow cell blocked by a compound that has precipitated or there

is a film built up on the flow cell. If you suspect the low lamp

energy is an abnormal indication, perform the steps in the

UICK CLEANING WHEN RECOMMENDED [ON-LINE] topic.

4.4.11 Setting the Vapor Limit

The module has an internal vapor sensor that detects vapors

present in the module. When the limit is exceeded, the

CombiFlash Torrent module will shut down to avoid a

hazardous condition.

Teledyne Isco recommends using the default setting of 12.

This value represents an organic vapor level slightly above the

ambient vapor level of a well-ventilated laboratory.

A setting below 12 could cause random alarms without

significant vapors present. If PeakTrak displays a Vapor Limit

alarm while the Vapor Limit is set at 12, perform the following

checks on your laboratory and the instrument:

• Ensure that no open containers or spills of organic

solvent are in close proximity to the module.

•Ensure that the module is located in a well-ventilated

area.

• Ensure that there is no visible solvent leakage from the

module.

If PeakTrak continues to display the Vapor Limit alarm after

you have made these checks and corrected any problems

found, it is likely that organic vapors are present in the

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Combi Flash 7650 Series Bedienungsanleitung Seite 131