ROC312 Solar EFM Testing

Outlaw Automation Inc
The test was conducted with the following materials under the specified conditions for the purpose of determining the lowest required power supply for use in the Northern Latitude Gas Fields of Alberta Canada. The Fisher Roc is used extensively and is a highly reliable controller capable of measuring gas flow, flow control and even Fisher ROC Optimization of gas wells.
Materials used: Solar 50W 2.9A BP 350J Solar Cell, 8G22NF 58Ah 12v Battery, Solar Regulator 12V 10Amp. ROC312 Atandard I/O, Analog 4-20ma transducer 0-300psig, Spreadspectrum 900Mhz Radio. ASCO EF831G301 12DCV LP Solenoid Valve.
Conditions: The sunlight conditions of the test are to simulate a 30% Charging duty cycle. So no snow coverage or any other obstruction was simulated.
The Cell was exposed to the south for 7.5 hours a day at an angle of 105 degrees. During the test cycle there where an equal amount of overcast days and sunny days. The temperature during testing was 15 degrees or greater. Test one was Flow monitoring only, just the ROC 312 and a Transducer. The Transducer had a larger current draw than a MVS sensor.
Test Two was conducted with Flow monitoring and a additional Transducer with (PID loop) control in mind. The radio was also included in this scenario. In total: The charging system (as listed above), Two Analog pressure transducers, Platinum RTD, SpreadSpectrum 900Mhz Radio, 12VDC Low Power
Solenoid for the ESD. The solenoid is energized and controlled thru a relay on the terminal strip. A single pole relay (PLC-BCS-12DC/21).
Calcs used for Radio: Duty Cycle=Pmax time /(Pmax time + Pmintime) this calculation is relevant for transmitters that output 4-20mA and radios that poll hourly etc. Power =(Pmax*Duty cycle)+(Pmin(1-Duty cycle)) So, with the Radio set up as a repeater would maybe run for maybe 10 mins an hour, in a worst case scenario. 10/(10+50)=0.16 The Radio documentation indicates that it will receive at 86mA and trasnsmit at 500mA, in a 12VDC configuration.
12 VDC System Data: The ROC312 = 1.310w (109ma), A/I loops x2 = 0.909w (75ma), RTD Module = 0.447w (37ma), Discrete Output = 0.244w (20ma) RTU = 2.910W. Add the Solenoid 1.750w (146ma), and the Radio = 2.330w (194ma) = 4.080 w for a Total System = 7.00w (582mA)
Now Calcs can be done to determine the amount of autonomy required for this job. An estimated life with no sun for this site should be greater than 100 hours.

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