
30
Technical reference
BF5 User Manual v 2.3
Other specifications
Accuracy : Sunshine hours
10% compared to the WMO definition
Accuracy : Cosine Correction
10% of incoming radiation over 0-90°
Zenith angle
Accuracy : Azimuth angle
5% over 360
rotation
Temperature coefficient
0.15 % /
C typical
Temperature range
-20 to + 50
C with Alkaline batteries
-20 to + 70
C with Lithium batteries
Stability
Recalibration recommended every 2
years.
Response time
< 250ms
Spectral Response
400-700nm (see graph)
Latitude capability
-90° to + 90
Environmental : Sealing
IP65 ( shower and dust proof)
Sunshine status : contact closure
No sun = open circuit
Sun = short circuit to ground
Internal Battery
2 x 1.5V AA Alkaline batteries
Power requirement
2mA, (awake ), <30
A (asleep)
Battery Lifetime
1 year typical
Input Voltage Range – powered from
internal battery
1.4 to 3.6V DC
Input Voltage Range - external power
5 to 15V DC
Fuse trip point, on sunshine status
signal, (when in switch-closure mode)
0.5A, 30V (self resetting)
Max applied voltage to sunshine status
output, in contact closure mode
0 to 24V.
RS232 connector
5-pin M12
Signal output & power-in connector
8 pin M12
Mounting options:
Camera tripod socket (¼inch Whitworth)
Holes for 4 x M4 bolts at corners of box.
Size & Weight
120mm x 122mm x 95mm, 635g
Heater output below 0
C
15 W
Heater output above 5
C
2W reducing to 0W at 35
C
Lowest snow & ice-free temperatures
-20
C at 0 m/s wind speed
-10
C at 2 m/s wind speed
Heater : max power
15 W at 12V DC
Heater : max current
1.5A at 15V
Fuse : max voltage, current
24V, 1.6A (self resetting)
Heater Input Voltage range
12 to 15V DC