Waters ACQUITY UPLC Operator's, Overview And Maintenance Manual page 10

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The column heater can accommodate UPLC columns of 4.6 mm, or less, ID
and 150 mm, or less, length and HPLC columns of 4.6 mm, or less, ID and
300 mm, or less, length. For columns that exceed 4.6 mm ID, use the
ACQUITY UPLC 30-cm column heater/cooler with the appropriate
compatibility kit.
A receptacle atop the column heater receives the column's eCord™ chip. The
chip stores column manufacturing and usage data, which you can access from
the ACQUITY UPLC Console.
The column heater does not have its own power supply; it draws power from
the sample manager. Thus the column heater is automatically powered-on
when you power on the sample manager. Do not use the 30-cm column heater
(CH-30A) in conjunction with the standard ACQUITY column heater (CH-A).
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