EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1
Pg. 16
5- 2. Setup
In order to obtain high quality measurements from pyranometers, several criteria with respect to setup and mounting
of the instruments have to be considered. Also see the Quick Start Guide for comprehensive setup instruction details
[included in the package of MS-80, MS-80S].
The ideal mounting position for a pyranometer is a location which has a full hemispheric field-of-view without any
obstructions [such as buildings, trees, and mountains]; however, it might be difficult to find such locations. Therefore
in practice, it is ideal to install in a position which is free from obstructions at 5° above horizon.
The setup location should be easily accessible for periodic maintenance [glass dome cleaning], and avoid
surrounding towers, poles, walls or billboards with bright colors that can reflect solar radiation onto the pyranometer.
A strong physical impact to the pyranometer can lead to product damage and/or may cause changes to the
sensitivity.
1. Installing at Horizontal or Tilted Position
1) Check the installation base where the pyranometer has to be mounted and make sure it has two fixing holes
with the appropriate pitch. The pitch sizes of the fixing holes are as follows [in mm]:
Table 5-3. Fixing Hole Pitch and Bolt Size for Pyranometers
MS-80 / MS-80S / MS-80U
Fixing Hole Pitch 65 mm
Fixing Bolt Size M5 x 75 mm
2) Remove a sunscreen [except for MS-80U]
The sunscreen can be removed by loosening the knurling screw and sliding it towards the spirit level direction.
*When carrying MS-80 or MS-80S with a sunscreen attached, always hold the instrument from the bottom.
Holding only the sunscreen may lead to dropping the sensor as it comes off from the sunscreen.
3) There are two ways to setup the pyranometer (Horizontal or inclined).
Installing at horizontal Position
Setup the pyranometer with the signal cable connector facing the nearest Earth’s pole. In the Northern
hemisphere, the connector should be orientated North, in the Southern hemisphere, the connector should be
orientated South. Adjust the pyranometer in a horizontal position by using the 2 levelling screws observing the
air bubble in the spirit level while manipulating the levelling screws. The instrument is levelled horizontally if
the air bubble is in the centre ring. The sensitivity of the bubble vial is (0.1º / mm). If the pyranometer is not
levelled properly, the pyranometer readings are affected by cosine and azimuth errors. Periodically check the
spirit level and adjust the pyranometer’s position if necessary.
To Next Page
Loading...
Need help?
General
