SR05-D1A3-PV manual v1801 36/83
5.9 Using SR05-D1A3-PV’s analogue 0 to 1 V output
SR05-D1A3-PV gives users the option to use 0 to 1 V output instead of its digital output.
This section explains how to use the 0 to 1 V output. When opting solely for
SR05-D1A3-PV’s digital output, please refer to section 5.8.
Using the 0 to 1 V output provided by SR05-D1A3-PV is easy. The instrument can be
connected directly to commonly used datalogging systems. The irradiance, E, in W/m
2
is
calculated by measuring the SR05-D1A3-PV output, a voltage U, in V, and then
multiplying by the transmitted range r. The transmitted range is provided with
SR05-D1A3-PV on its product certificate. By convention 0 W/m
2
irradiance corresponds
with 0 V transmitter output voltage. The transmitted range, which is the irradiance at
output voltage of 1 V, and is typically 1600 W/m
2
. The transmitted range can be adjusted
at the factory upon request.
The central equation governing SR05-D1A3-PV is:
E = r·U (Formula 5.9.1)
The standard setting is: E = 1600·U. See chapter 5.5 and the diagram below for
electrical connections to voltmeters, when using SR05-D1A3-PV’s 0 to 1 V output.
Figure 5.9.1 Electrical diagram of the connection of SR05-D1A3-PV to a typical
voltmeter or datalogger with the capacity to measure voltage signals. SR05-D1A3-PV
operates on a supply voltage of 5 to 30 VDC.
SR05-D1A3-PV
brown [+]
black blue 0 to 1 V output
V
ground
power supply 5 to 30 VDC
voltmeter
yellow
U = 0 - 1 VDC
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