Agilent Technologies InfinityLab LC Series User Manual page 136

9 Maintenance
Replace Valve Heads
Column Damage or Bias Measurement Results
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Switching the valve to a wrong position can damage the column or bias
measurement results.
Fit the lobe to the groove to make sure the valve is switched to the correct

position.
The valve actuator contains sensitive optical parts, which need to be protected
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from dust and other pollution. Pollution of these parts can impair the accurate
selection of valve ports and therefore bias measurement results.
Always install a valve head for operation and storage. For protecting the

actuator, a dummy valve head (part of Transportation Lock Kit
(G1316-67001 )) can be used instead of a functional valve. Do not touch
parts inside the actuator.
The tag reader reads the valve head properties from the valve head RFID tag
NOT E
during initialization of the module. Valve properties will not be updated, if the
valve head is replaced while the module is on. Selection of valve port positions
can fail, if the instrument does not know the properties of the installed valve.
To have the valve correctly recognized by the Agilent Infinity Valve Drive you
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must have the valve drive powered off for at least 10 seconds.
Agilent InfinityLab LC Series Multicolumn Thermostats User Manual 136