Shutting Down The Autosampler; Flushing The Rinse Station And Flow Path - Teledyne CETAC ASX-112FR Operator's Manual

ASX-112FR Autosampler Operator's Manual
Chapter 5: Using the Autosampler
Ensure there are no air bubbles visible in the rinse uptake tubing before you
run samples with the autosampler.
Access the host computer's ICP-MS software and activate the autosampler
program.
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Define and start the sampling sequence. The autosampler runs until it reaches
the end of the sampling sequence.

Shutting Down the Autosampler

To shut down the autosampler, complete the following steps:
(Gas-Displacement pump equipped models) Drain the rinse system by removing
the rinse solution uptake tubing from the rinse solution source. Let the gas
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displacement pump run until all solution drains from the tube attached to the
rinse station outlet.
If you use a rinse solution other than deionized water, flush the rinse system
with deionized water before shutting down the autosampler. For more
information, see "Flushing the Rinse Station and Flow Path" on page 50.
Turn off the autosampler power switch.
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If you will be performing maintenance, unplug the power cord either at the
power supply or at the wall outlet.
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(Peristaltic pump-equipped models) After the rinse station has been pumped
empty and the power turned off, place the uptake tubing into a clean waste
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container. Release the peristaltic pump pressure shoes from contact with the
pump tubing by disengaging their latches, allowing any remaining rinse
solution that may be trapped in the rinse system to drain to the waste
container. (Be sure to re-engage the pressure shoe latches and return the rinse
solution uptake and drain tubing to the proper vessel(s) before restarting and
operating the autosampler.) Releasing the pressure shoe decreases wear on the
pump tubing.

Flushing the Rinse Station and Flow Path

Generally, you can operate the autosampler without flushing the rinse system.
Under normal circumstances, you can simply drain the rinse system prior to
shutting down the autosampler. However, you need to flush the rinse station
and flow path under two circumstances:
 During initial startup of the autosampler after installation.
 After the use of more concentrated (>10% (v/v)) bases, acids, or organic
solvents as rinse agents.
Flushing the rinse system during initial startup of the autosampler removes
any contaminants that could cause interference during sample analysis.
Flushing the rinse system after using stronger rinse agents prevents
degradation and failure of the flow path components.
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