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EL-9900 Graphing Calculator
3
DisplayStep
Key Operation
1
2
Specify the programme mode.
Select the title CAND LUX.
(Display of luminous intensity)
Exercise
(1) Find the luminous intensity of the luminous source of distance 10m, angle 60˚
and illuminance 20 lux.
(2) Find the illuminance of the illuminated side of distance 10m, angle 60˚ and
luminous intensity 4000 candela.
Set up condition: decimal point in Float Pt Mode.
4
(Display of illuminance)
Select calculation of luminous
intensity.
Select calculation of illuminance.
Enter the values of distance,
angle, and luminous intensity.
Enter the values of distance,
angle, and illuminance.
7
CL
SET UP
2nd F
1C
PRGM
A
ENTER
1
ENTER
10
2
0
60
ENTER
ENTER
ENTER ENTER
ENTER
ENTER
ENTER
10
6
0
4
000
2