Section 11.  Glossary 
 
 
Term: volts 
SI unit for electrical potential. 
 
Term: VSPECT 
trademark for Campbell Scientific's proprietary spectral-analysis, frequency 
domain, vibrating wire measurement technique 
 
Term: watchdog timer 
An error-checking system that examines the processor state, software timers, 
and program-related counters when the CRBasic program is running.    See 
section Watchdog Errors 
(p. 474). The following will cause watchdog timer 
resets, which reset the processor and CRBasic program execution. 
o  Processor bombed 
o  Processor neglecting standard system updates 
o  Counters are outside the limits 
o  Voltage surges 
o  Voltage transients 
When a reset occurs, a counter is incremented in the WatchdogTimer entry 
of the Status table 
(p. 533). A low number (1 to 10) of watchdog timer resets 
is of concern, but normally indicates that the situation should just be 
monitored. 
A large number of errors (>10) accumulating over a short period indicates a 
hardware or software problem.    Consult with a Campbell Scientific support 
engineer. 
 
Term: weather-tight 
Describes an instrumentation enclosure impenetrable by common 
environmental conditions. During extraordinary weather events, however, 
seals on the enclosure may be breached. 
 
Term: web API 
Application Programming Interface.