Premium
Inexpensive Automated Paging System for Use at Remote Research Sites
Author(s) -
Sargent S. L.,
Dey W. S.,
Keefer D. A.
Publication year - 1998
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1998.03615995006200030007x
Subject(s) - relay , reset (finance) , data logger , paging , computer science , computer hardware , real time computing , telecommunications , power (physics) , computer network , operating system , physics , quantum mechanics , financial economics , economics
The use of a flow‐activated automatic sampler at a remote research site required personnel to periodically visit the site to collect samples and reset the automatic sampler. To reduce site visits, a cellular telephone was modified for activation by a datalogger. The purpose of this study was to demonstrate the use and benefit of the modified telephone. Both the power switch and the speed‐dial button on the telephone were bypassed and wired to a relay driver. The datalogger was programmed to compare values of a monitored environmental parameter with a target value. When the target value was reached or exceeded, the datalogger pulsed a relay driver, activating power to the telephone. A separate relay activated the speed dial, dialing the number of a tone‐only pager. The use of this system has saved time and reduced travel costs by reducing the number of trips to the site, without the loss of any data.