EKO INSTRUMENTS CO., LTD Grating Spectroradiometer WISER Instruction Manual Ver.2
Pg. 14
2. Installing at Horizontal or tilted Positions
(1) Prepare Installation Base
Check the installation base where the MS-711 and MS-712 sensors have 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
MS-711 Sensor
MS-712 Sensor
Fixing Hole Pitch
200 mm
280mm
Fixing Bolt Size
M8 x 75mm
M8 x 90mm
(2) Setup the MS-711 and MS-712 Sensors
Setup the sensors 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.
(3) Leveling
Adjust the sensors in a horizontal position by using the 2 leveling screws and observing the air
bubble in the spirit level while manipulating the leveling screws. The instrument is leveled
horizontally if the air bubble is in the center ring. Once the instrument is leveled properly, fix the
instrument with mounting bolts.
In case the sensors are mounted on a tilted plane, preferably the sensors are mounted on the
leveling screws to thermally isolate the sensors form the mounting platform.
If the sensors are not leveled properly, the readings are affected by cosine and azimuth errors.
Periodically check the spirit level and adjust its position if necessary.
Figure 5-3. Dimensions (Left: MS-711, Right: MS-712)