Technical Section
Hardware Configurations
The Model FHM10 Fume Hood Monitor can be field-configured to monitor face velocity or flow
rates, while the Model FHC50 Fume Hood Controller can be field-configured to control face
velocity or flow rates. These models feature a configuration wizard to easily select the desired
monitor or controller configuration.
The following tables will assist in determining which configuration will need to be programmed
into the controller for proper operation. You can also use the tables as a check to ensure that the
monitor or controller has been properly configured after changing default settings from the
configuration wizard.
Please note that in some applications, there may be a flow sensing device present at the fume
hood exhaust (flow station, venturi valve linear feedback, etc.), but which is not used by the fume
hood controller. The flow sensing information may be intended only to be received by a room
controller for flow tracking purposes. This will not affect the operation of the fume hood controller
provided it is configured correctly.
Model FHC50 Controller Modes
NORMAL &
SETBACK
CONTROL
TYPES
Face Velocity
With Flow
Limits
Pressure-
Based Flow
Station
Face Velocity
With Flow
Limits
Face Velocity
With Flow
Limits
Venturi
Valve With
LOM
Feedback
Face Velocity
With Flow
Limits
Venturi
Valve (No
Feedback)
Pressure-
Based Flow
Station
Venturi
Valve With
LOM
Feedback
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