Finding North, and setting the shade ring

If you are taking measurements which require only the incident total radiation on the canopy, you can ignore the compass orientation of the BFS and you should set the shade ring horizontal so that it is not in use.

If, however, you want the Direct and Diffuse components of the incident radiation, you must elevate the shade ring so that its shadow falls across the Diffuse sensor (the one directly in line with the shade ring pivots), covering it completely.

If you are moving the BFS frequently, the compass orientation of the BFS need not be accurately set to north. If you want the shadow to track correctly for longer periods of time, set the BFS to point true north more carefully. The same instructions apply if you are using the BFS in the southern hemisphere.

The shadow may not track perfectly throughout the course of a whole day, owing to limitations imposed by the simple and robust design of the BFS. You should inspect the BFS from time to time and readjust the ring if necessary.

In overcast conditions, the exact elevation of the shade ring is not critical (and it is quite difficult to estimate!). If there is any chance of direct sun breaking through, you must wait for it to do so before setting the elevation.

Levelling the BFS

The BFS is equipped with a miniature bubble level. The tripod supplied has 3-axis adjustment to facilitate levelling.

It is more important to level the BFS accurately than the probe.

The usual routine for setting up the tripod will be:

•Orientate the BFS to face true north.

•Level the BFS.

•Elevate the shade ring to bring the shadow completely across the Diffuse sensor (the northernmost one).

Extension cables, and the location of the BFS

Extension cables of 10, 25 and 50 m can be fitted between the BFS and the probe, which will extend your range of operation from the BFS. There is a trade-off between range and convenience: the greater your range, the fewer times you need to re-site the BFS, but the more time you are likely to spend handling the cable.

Extension cables can be joined together. A combination of two shorter cables may be preferable to one long one.

You should bear in mind that the SunScan will read the BFS and probe simultaneously. If the different locations are widely spaced apart, the light levels could momentarily be different - cloud shadows can easily travel at 20 m.s-1.

The solution is to be aware of this possibility in fast changing conditions and avoid taking readings at critical moments.

Very long cable lengths may introduce a small systematic error in BFS readings. Up to 100 metres, this should not be significant (< 10 ∝ mol.m-2.s-1). At 200 metres it could add about 20 ∝ mol.m-2.s-1to the readings, which may need subsequent adjustment .

50 • Measurement options

Document code: SS1-UM-1.05

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Delta Electronics SS1-UM-1.05 user manual Finding North, and setting the shade ring, Levelling the BFS
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SS1-UM-1.05 specifications

Delta Electronics has long been recognized for its innovative solutions in power and thermal management technologies. One of its notable products is the SS1-UM-1.05, a compact and efficient power supply module designed to meet the needs of a variety of applications, from industrial automation to telecommunications.

The Delta SS1-UM-1.05 is a key component in the company’s extensive portfolio, providing reliable and stable power supply for both demanding and sensitive electronic equipment. One of the main features of this module is its high efficiency, which typically exceeds 90%. This not only minimizes energy consumption but also reduces heat generation, making it an ideal choice for applications where thermal management is crucial.

Another significant characteristic of the SS1-UM-1.05 is its wide input voltage range, which allows it to operate effectively in various environments. The module supports a voltage range from 90 to 264 VAC, ensuring consistent performance even in fluctuating supply conditions. This versatility makes it well-suited for global applications, accommodating different electrical standards and requirements.

The SS1-UM-1.05 also boasts a compact footprint, which is essential for space-constrained installations. Its design emphasizes not only performance but also ease of integration into existing systems. The module provides multiple output voltage options, allowing it to cater to specific power requirements, whether it be for industrial machinery or consumer electronics.

In terms of technologies, the SS1-UM-1.05 incorporates advanced power conversion technologies that enhance its overall performance. It features overload protection and thermal shutdown mechanisms to safeguard both the module and the equipment it powers from potential damages due to electrical faults. Moreover, it has low electromagnetic interference (EMI) emissions, which is crucial for environments sensitive to electrical noise.

The SS1-UM-1.05 is also designed with a robust enclosure that adheres to stringent safety and environmental standards. This enhances its durability and reliability, ensuring it can withstand harsh operating conditions. With these features, Delta Electronics demonstrates its commitment to delivering high-quality products that meet the evolving needs of industries worldwide.

Overall, the Delta SS1-UM-1.05 power supply module is an exemplary solution for those seeking a reliable, efficient, and compact power source. Its advanced features and technologies make it an indispensable component in modern electronic systems.
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