4. THEORY OF OPERATION page 12
4. THEORY OF OPERATION
The alarm monitor model
Please reference the wiring/signal flow diagram drawings package provided with the instrument as they are noted in this manual. The Drawings list can be found in the APPENDIX F. Drawings section in this manual.
4.1. UNIT OPERATION
The relays in the portal monitor are continuously monitored by the
NOTE:
Multiple alarms can occur and more than one alarm lamp be illuminated simultaneously.
The monitor operates from the 12 volt, lead acid battery. If ac power is lost, the battery provides power to permit continued operation without interruption. Should the battery get too low for reliable operation (approximately 10.5 volts), the monitor will turn itself off. Normal operation will resume when the battery has been recharged to approximately 12.5 volts.
Model