What does Sample 1 Warning (W12) mean on the Amtax sc analyzer and how can I troubleshoot?

Dokument-ID

Dokument-ID TE2170

Veröffentlichungsdatum

Veröffentlichungsdatum 05.03.2019
Frage
What does Sample 1 Warning (W12) mean on the Amtax sc analyzer and how can I troubleshoot?
Zusammenfassung
Amtax sc Sample 1 Warning (W12) information and details.
Antwort
An issue with the non-return sample pressure relief valve on the drain side of the overflow vessel can result in the Sample 1 Warning (W12) on the Amtax sc analyzer for a few possible reasons: 
1. This can cause back pressure on the sample and restrict the flow when the piston is drawing sample.
2. It can change the pressure enough to cause the error but still allow enough sample into the sample chamber.

The "leak test" only tests pressure leaks at the solenoid and doesn't test for backpressure. Pressure difference during the cycle should be minimal (0.9983 bar dropping to 0.9943 bar for example). Each analyzer will be a little bit different. A leak will be detected by a significantly larger pressure difference during the cycle. Replacing the sample relief valve can resolve the issue if it is faulty.

The relief valve is Product # LZY867 if it needs to be replaced.

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