Waters ACQUITY UPLC Operator's, Overview And Maintenance Manual page 11

30-cm column heater components:
Location of active preheater
or active preheater key
Drip tray with leak
sensor
Column manager (CM-A) and auxiliary column manager (CM-Aux)
The column manager can regulate the temperature of as many as four
columns between 4 and 90 °C. The temperature of each column trough can be
independently set in 0.1 °C increments. The column manager can be used for
column switching applications as well as two dimensional applications. For
two dimensional applications, see the ACQUITY UPLC Systems with 2D
Technology Capabilities Guide.
Location of active preheater
or active preheater key
Location of column
Column compartment tray
Overview 7