press <1> to start the sample measurement. Prompt --“Insert the sample and
press START to measure”-- is displayed at the bottom of the screen.
Then insert unknown samples and press START. The concentration calculation
If the sample were measured more than 1 times, you can press <6> to get
he values of “Mean”, “SD” and “CV” are calculated according the following
is performed automatically and the measured results will be displayed on the
LCD. The measurement result will be displayed on the screen as follow.
Note: Press Autozero key to exert an autozero before measurement.
statistics. The display will be as following:
13/11/02
15:55
600.0
nm
0.854
ABS
Photometry
0.098
ID
ABS
Conc
1
0.087
5.0
2
0.098
10.0
0.087
0
MG/L
10.0
Select Function: _
Mean=7.5
2
SD=3.535
3
CV=47.13
T
formula.
N
Xi
MEAN
∑
=
1
2
−
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
−
=
∑
∑
N
N
x
x
SD
i
i
100
×
=
MEAN
SD
CV
3-18
