K2A Sensor Calculations

WennSoft has predefined sensor calculations to choose from when creating your calculated sensors.

Name	Formula
Cooling Air Temperature Deviation	Cooling Air Temperature Setpoint - Cooling Air Temperature
Chilled Water Approach	(Evaporator Leaving Water Temperature) – (Evaporator Saturated Refrigerant Temperature)
Condenser Water Approach	(Condenser Saturated Refrigerant Temperature) – (Condenser Leaving Water Temperature)
Chilled Water Delta T	(Evaporator Entering Water Temp) – (Evaporator Leaving Water Temp)
Condenser Water Delta T	(Condenser Leaving Water Temp) – (Condenser Entering Water Temp)
Differential Steam Pressure Deviation	(abs(Differential Steam Pressure Setpoint - Differential Steam Pressure) / max(0.1, Differential Steam Pressure Setpoint)) * 100
Differential Water Pressure Deviation	(abs(Differential Water Pressure Setpoint - Differential Steam Pressure) / max(0.1, Differential Water Pressure Setpoint)) * 100
Heating Air Temperature Deviation	Heating Air Temperature Setpoint - Heating Air Temperature
Outside Air Dewpoint	Celcius to Celsius Formula T_s = (243.04 × ln(RH / 100) + 17.625 T/(243.04 + T)) / (17.625 - ln(RH / 100) + 17.625 T/(243.04+T)) Fahrenheit to Fahrenheit Formula T_s = [ (243.04 × ln(RH / 100) + 17.625 * ((T - 32) * 5/9)/( 243.04 + ((T - 32) * 5/9)) ) / (17.625 - ln(RH / 100) + 17.625 * ((T - 32) * 5/9)/(243.04 + ((T - 32) * 5/9))) ] * 9/5 + 32 Fahrenheit to Celcius Formula T_s = (243.04 × ln(RH / 100) + 17.625 * ((T - 32) * 5/9)/( 243.04 + ((T - 32) * 5/9)) ) / (17.625 - ln(RH / 100) + 17.625 * ((T - 32) * 5/9)/(243.04 + ((T - 32) * 5/9))) T: Outside Air temperature RH: Outside Air Relative Humidity T and RH are existing sensors.
Outside Air Wet Bulb	Celcius to Celsius Formula T_w = T arctan(0.151977 (RH + 8.313659)1/2) + arctan(T + RH) − arctan(RH − 1.676331) + 0.00391838(RH)3/2arctan(0.023101RH) − 4.686035 Fahrenheit to Fahrenheit Formula T_w = [ ((T - 32) * 5/9) * arctan(0.151977 (RH + 8.313659)1/2) + arctan( ((T - 32) * 5/9) + RH) − arctan(RH − 1.676331) + 0.00391838(RH)3/2arctan(0.023101RH) − 4.686035 ] * 9/5 + 32 Fahrenheit to Celcius Formula T_w = ((T - 32) * 5/9) * arctan(0.151977 (RH + 8.313659)1/2) + arctan( ((T - 32) * 5/9) + RH) − arctan(RH − 1.676331) + 0.00391838(RH)3/2arctan(0.023101RH) − 4.686035 T: Outside Air temperature RH: Outside Air Relative Humidity T and RH are existing sensors.
Power	Current * Voltage
Power (kVa) *coming soon	Power + Power + Power + Power
Primary Differential Water Pressure Deviation	(abs(Primary Differential Water Pressure Setpoint - Primary Differential Water Pressure) / max(0.1, Primary Differential Water Pressure Setpoint)) * 100
Primary Supply Water Temperature	Primary Supply Water Temperature Setpoint - Primary Supply Water Temperature
Secondary Differential Water Pressure Deviation	(abs(Secondary Differential Water Pressure Setpoint - Secondary Differential Water Pressure) / max(0.1, Secondary Differential Water Pressure Setpoint)) * 100
Secondary Supply Water Temperature Deviation	Secondary Supply Water Temperature Setpoint - Secondary Supply Water Temperature
Space Air CO Deviation	Space Air CO Setpoint - Space Air CO
Space Air CO2 Deviation	Space Air CO2 Setpoint - Space Air CO2
Space Air Dewpoint	Space Air Temperature(C) - ((100 - Space Air Relative Humidity) / 5)
Space Air Methane Deviation	Space Air Methane Setpoint - Space Air Methane
Space Air PM2.5 Deviation	Space Air PM2.5 Setpoint - Space Air PM2.5
Space Air Relative Humidity Deviation	Space Air Relative Humidity Setpoint - Space Air Relative Humidity
Space Air Temperature Deviation	Space Air Temperature Setpoint - Space Air Temperature
Space Air TVOC Deviation	Space Air TVOC Setpoint - Space Air TVOC
Supply Air Flow Deviation	(abs(Supply Air Flow Setpoint - Supply Air Flow) / max(0.1, Supply Air Flow Setpoint)) * 100
Supply Air Pressure Deviation	(abs(Supply Air Pressure Setpoint - Supply Air Pressure) / max(0.1, Supply Air Pressure Setpoint)) * 100
Supply Air Temperature Deviation	Supply Air Temperature - Supply Air Temperature Setpoint
Supply Water Flow Deviation	(abs(Supply Water Flow Setpoint - Supply Water Flow) / max(0.1, Supply Water Flow Setpoint)) * 100
Supply Water Temperature Deviation	Supply Water Temperature Setpoint - Supply Water Temperature
Total Runtime	Sum of Time for time given for a True condition.