Cotter Corporation (N.S.L.)
Cañon City Milling Facility
Cañon City, Colorado
Procedure
Weather Monitoring
Number: SOP-E-130
Page 7 of 10
Version: 1
Date: --/--/--
Model 090 D-1, Barometric Pressure Senso
r
The Model 090D-1 Barometric Pressure Sensor employs a linear, solid-state pressure transducer.
The transducer is mounted in a weatherproof enclosure. Ac 0.04 in Hg (+ 1.35 mb) or +
0.125% FS.
Model 375 Precipitation Gauge
The Model 375 Precipitation Gauge is designed such that rainfall entering the 8" funnel collector
is directed to the tipping bucket assembly. When a precise amount of precipitation has been
collected, the bucket assembly tips and activates a mercury switch. A momentary electrical
contact closure through the switch is provided for each increment of rainfall. The sample is
discharged through the base of the gauge. The model 375 is a heated rain gauge employing
thermostatically controlled heating elements to melt and measure the water content of snow and
frozen rain, but to avoid evaporative loss. Resolution - .01", Ac 0.5% at 0.5"/hour / +
1.0% at 1" to 3"/hour.
Model 550 Evaporation Gauge
The Model 550 Evaporation Gauge measures the water level in a standard evaporation pan and
provides an output proportional to that level. The gauge employs a unique balance assembly to
allow high resolution and simple data collection. Range 0-6" (0 - 150 MM), Resolution Infinite,
Ac 0.015".
Model 456 Data System
The Model 456 Data System is a completely integrated weather data system for onsite
environmental recording. A built in data-logger scaled directly to the recorded measurements
provides an easy to read permanent record of the measured meteorological variables. The
standard equipment includes data-logger, computer interface, lightning protection, back-up
battery, direct sensor hook-up and graphic user interface.
Summary of Contents for sympHony
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