The fume hood application type handles a fume hood or other laboratory exhaust equipment. It functions independently, but coordinates with a pressurized room control application. The diagram below shows the components and devices that may be configured for use in a fume hood application.

Description

Parameter

Default value

Switch delay after emergency to emergency setpoint
▶ If a time value other than 0 is used, then during an emergency purge the fume hood exhaust damper opens to 100% for that amount of time, after which the damper will go to the emergency purge setpoint value in the fume hood exhaust air setpoint AF (FhSpEhxx).

SwiDlySpEmg

300 [s]

Low air volume flow alarm limit

LoAirFlAlmLm

70 [%]

Low air volume flow warning limit

LoAirFlWarnLm

85 [%]

High air volume flow warning limit
▶ If the client chooses not to use the high flow warning limit, set to a high value such as 500%.

HiAirFlWarnLm

135 [%]

High air volume flow alarm limit
▶ If the client chooses not to use the high flow alarm limit, set to a high value such as 500%.

HiAirFlAlmLm

150 [%]

Switch-on delay for alarms
▶ Set long enough to eliminate nuisance alarms, and short enough to satisfy safety concerns.

DlyOnAlm

5 [s]