EKO INSTRUMENTS CO., LTD Grating Spectroradiometer MS-713 Instruction Manual Ver5
Pg. 14
(2) Setup the MS-713 Sensor
Setup the sensor 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 sensor is mounted on a tilted plane, preferably the sensor is mounted on the leveling
screws to thermally isolate the sensor form the mounting platform.
If the sensor is not leveled properly, the readings are affected by cosine and azimuth errors.
Periodically check the spirit level and adjust its position if necessary.
(4) Adjust Height
To take measurements by setting up the MS-713 side by side, the sensor surface must be adjusted
to the same height level.
(5) Cover
Place the Cover on the instrument and fasten with 3 screws (M3).
(6) Connect Sensor Cable
Connect the sensor cable connector to the sensors and the Y-terminals to the terminal block of the
power supply according to the table below.
Make sure the sensor connector part is securely connected so that moisture will not enter the
connector. Also fasten the cable with such as band strip so that it will not be blown by wind
If the sensors are setup on Sun Tracker, make sure to have sufficient length of cable for rotation
movement.
Use + screw driver to connect the cable to lug terminals on the power supply, make sure the cable
numbers and the terminal numbers match.
NOTE: The power supply can’t be used in an unprotected outdoors environment, as it can only be
used in a dry environment.
Table 5-4. Terminal block layout and Wire colors
Terminal block
Wire Color
Wire #
1
TXD+ (RS-422)
Brown
1
2
TXD- (RS-422)
Red
2
3
RXD+ (RS-422)
Orange
3
4
RXD- (RS-422)
Yellow
4
5
Digital GROUND
Green
5
6
Supply power +5V
Gray/Blue
6
7
Supply power ground
White/Yellow
Green
7
(DC GND)
