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CombiFlash NextGen Systems
Section 2 Preparation
Figure 2-16 Vapor Limit warning
2-18
Table 2-1 Vapor Limits
Sensitivity
Setting
Low
Medium
High
Medium and High sensitivity settings may result in false alarms
(i.e., no internal leak in the system) when the ambient vapor
level in the area is high. If PeakTrak displays a Vapor Limit
alarm (shown below), perform the following checks on your labo-
ratory and on the instrument:
• Ensure that no open containers or spills of organic
solvent are in close proximity to the system.
• Ensure that the system is located in a well-ventilated
area.
• Ensure that there is no visible solvent leakage from the
system.
Once you have remedied the cause for the vapor sensor alarm,
you may choose to change the default vapor sensitivity level or
ignore the vapor alarm and continue operation without the vapor
sensor disabled for 10 minutes.
If PeakTrak continues to display the Vapor Limit alarm after you
have made these checks and corrected any problems found, it is
likely that excessive organic vapors are present in the ambient
environment of your laboratory, or the laboratory has higher
ambient humidity and/or temperature conditions. In this case,
choosing a lower sensitivity Vapor Limit setting is possible. Low
sensitivity settings are appropriate for laboratory environments
with a somewhat elevated background solvent vapor concen-
tration. By changing the Vapor Limit sensitivity level, the user
EAR99 Technology Technology Subject to Restrictions Contained on the Cover Page
Percentage
(relative to the LEL
of hexane)
45%
15%
5%
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