Accessories; Diffuse Radiation Measurement; Ventilation; Mountings - Kipp & Zonen SMP series Instruction Manual

3. Accessories

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Below is a brief description of the accessories available for SMP series pyranometers. Detailed information can be found on our
website, where the brochures and manuals for these accessories can be viewed and downloaded.

3.1 Diffuse radiation measurement

For measuring di use radiation a shading device is required. Kipp & Zonen can o er several options for SMP pyranometers:
Shadow ring CM121B for a SMP3 or an unventilated SMP
Shadow ring CM121C for a ventilated SMP6 to SMP22
This shadow ring needs to be adjusted manually every 3-5 days and corrections made for the sky obscuration by the ring.
An automated and more accurate way to measure di use radiation is to use an automatic sun tracker fitted with a shading
mechanism:
SOLYS2 sun tracker + shading ball assembly
SOLYS Gear Drive sun tracker + shading ball assembly

3.2 Ventilation

To further improve measurement accuracy of the SMP6 to SMP22 pyranometers the CVF4 ventilation unit can be used. CVF4 has
a tacho output to monitor the fan speed and 5 or 10 Watt heater. The advantages of a CVF4 are:
Lower thermal o sets
No precipitation or condensation on the dome
Less dirt on the dome
Frost, snow or ice can be melted
Less frequent cleaning required

3.3 Mountings

For mounting pyranometers the following plates and brackets are available:
Mounting rod for SMP3
CMF1 mounting fixture with rod for mounting one or two unventilated SMP's
CMF4 mounting plate with rod for mounting one or two ventilated SMP's
CMB1 mounting bracket to fix and adjust a mounting rod to a mast, pole or wall
Adjustable tilt mounting kit allows tilting of a SMP pyranometer (e.g. in the same plane as a PV panel), It has a
clear scale for setting the desired angle.

3.4 Glare screen kit

When a SMP6 to SMP22 pyranometer is mounted looking downwards, to measure reflected radiation, it should be fitted with
the glare screen kit. The screen blocks radiation coming from the 5 ° below the horizon of the pyranometer, to prevent direct
illumination of the domes by the sun at sunrise and sunset.

3.5 Cables

As standard a 10 m long cable with a pre-wired waterproof connector plug is supplied. Optional longer cables are available, or
a loose connector only for you to fit to your own cable.
25 m cable with connector
50 m cable with connector
Loose connector without cable
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