
IV_AIR_PRESSURE
IV_AIR_PRESSURE is the derived air pressure at the end of the averaging interval. This is the value being used by the internal sun
tracking process and derived from the mean altitude. The mean altitude is a moving average over 30 seconds and only updated if
deviating more than 50 m from the currently active altitude. When there is no GPS fix, the last known air pressure remains in effect.
The following barometric formula is being used to convert from altitude to air pressure.
IV_AIR_PRESSURE = 1013 • e
(-altitude / 7400)
• Pressure at sea level is 1013 mBar
• The scale height is 7400 m
• The altitude in m
• IV_AIR_PRESSURE in mbar
IV_IRR_DIFFUSE
IV_IRR_DIFFUSE is the mean diffuse irradiance in W/m2. Register IV_LEN indicates the length of the averaging interval. The sample
rate is 1/s. Input PYRANO_DIFFUSE indicates whether samples in this register are being calculated or measured. When the samples
are being calculated, the following formula is used.
I
diffuse
= I
global
- I
direct
•
cos (ze)
Where:
• I
global
is the calculated global irradiance in W/m2
• I
diffuse
is the measured diffuse irradiance in W/m2
• I
direct
is the measured direct irradiance in W/m2
• ze is the zenith angle in radians or degrees
IV_IRR_DIRECT
IV_IRR_DIRECT is the mean direct irradiance in W/m2. Register IV_LEN indicates the length of the averaging interval. The sample rate
is 1/s.
IV_IRR_GLOBAL
IV_IRR_GLOBAL is the mean global irradiance in W/m2. Register IV_LEN indicates the length of the averaging interval. The sample
rate is 1/s. Input PYRANO_DIFFUSE indicates whether samples in this register are being calculated or measured. When the samples
are being calculated, the following formula is used.
I
global
=
I
diffuse
+
I
direct
• cos ( ze )
Where:
• I
global
is the calculated global irradiance in W/m2
• I
diffuse
is the measured diffuse irradiance in W/m2
• I
direct
is the measured direct irradiance in W/m2
• ze is the zenith angle in radians or degrees
IV_TEMP_PYRANO
IV_TEMP_PYRANO is the mean temperature in degrees Celsius of the radiometer measuring diffuse or global irradiance. Register
IV_LEN indicates the length of the averaging interval. The sample rate is 1/s.
IV_TEMP_DIRECT
IV_TEMP_PYRANO is the mean temperature in degrees Celsius of the radiometer measuring direct irradiance. Register IV_LEN
indicates the length of the averaging interval. The sample rate is 1/s.
Summary of Contents for RaZON+
Page 1: ...RaZON Solar Monitoring System Instruction Manual ...
Page 2: ...2 ...
Page 4: ...4 ...
Page 6: ...6 ...
Page 12: ...12 ...
Page 42: ...42 ...
Page 44: ...44 ...
Page 50: ...50 ...
Page 52: ...52 ...
Page 71: ...71 Example of a logged ASCII data file via Wi Fi Logging Eport Log File ...