Alarm Setup; Sash Alarm - Sash Area; Cfm Alarm - Sash Area - Critical Room Control CRC-FHM User Manual

Alarm Setup

This screen contains the parameters to set face velocity or volume alarm when monitor is in the
"IN USE" mode. This screen also contains the parameters used to configure the audible alarm
delay time, sash alarm and energy saver alarm delay.

Sash Alarm - Sash Area

If the total sash area is greater than the value entered for the "Area
Alarm", for a longer period of time than the time set in the "Delay
(Sec)." field, the sash visual and audible alarm will be triggered.
The audible alarm can be muted by the user by clicking on the
"Sash Alarm" button.
This feature can only be used when connected to a sash sensor.
CFM Alarm – Sash Area
Similar to the Area Alarm, the CFM Alarm will be triggered if the
current CFM is greater than the value entered for the "CFM
Alarm", for longer period of time than the time set in the "Delay
(Sec)." field. The audible alarm can be muted by the user by
clicking on the "Sash Alarm" button.
The CFM Alarm feature is used when the CRC-FHM/C is using a sidewall sensor to monitor face
velocity instead of a sash sensor.
Fume Hood Monitor and Controller – User Guide
Alarm range over and under set point. Visual and
audible alarm will occur when flow exceeds "In Use"
set point + (plus) High value, or falls below "In Use"
set point – (minus) Low value.
Audible alarm / nuisance delay
A sash area alarm will be triggered if total sash area
is greater than this value (see "Sash Alarm" below)
A sash area alarm will be triggered if total CFM area is
greater than this value (see "CFM Alarm" below)
Sash alarm delay – used for both Sash Area Alarm
and CFM Alarm
The delay before the FHM/C is put in standby
mode (see "Energy Saver Mode" on next page)
18 © 2016 CRITICAL ROOM CONTROL