Emergency Purge Button on front of monitor activates a relay that can be used to command the fume hood damper to full open until pressed again. 125V AC, form A relay. External Alarm Input Intermittent audible and LCD status indicator indicate external alarm. Sash Override Alarm Input Audible and LCD status indicator indicate the sash position switch has been tripped. Calibration Two point field calibration required.
Monitor fits into a single electrical receptacle box knock-out.
The calibration and configurable parameters are stored to nonvolatile memory of the instrument and are not lost when the monitor loses power. Model Description Part Number 335 Flush mount. Colored analog scale and digital flow indication. Includes mounting hardware, tubing, sidewall adapter, wall plug-in power supply and owner's manual. The AirGard 385 continuously monitors fume hood face velocity by measuring the air velocity of clean air from the room passing through the air inlet on the front of the monitor.