2.
COD test description
Item
Steps
Display
1
Turn on the power, the screen shows
LOGO
2
Curve menu appears after 2 seconds
1 : H A C H < <
2 : L o v i b o n d
3
Press
button and
button
to
select the standard curve
（
HACH
，
Lovibond
，
CHEMetrics
）
or User curve
（
User-1 ~ User-6
），
”<<”
symbol
represents the position of the
option
，
Press
button to enter the
Curve range menu
1 : H A C H < <
2 : L o v i b o n d
4
Press
button to select 150
、
1500 or
15000
，
“
＜
”symbol represents the
position of the option
，
Press
button to enter the Work menu
H A C H - 1 5 0
1 5 0 1 5 0 0 < 1 5 0 0 0
5
Select
“
Start
”
option
，
Press
button to enter COD test
H A C H - 1 5 0 0
S t a r t < I n f o
6
Insert Blank tube
H A C H - 1 5 0 0
I n s e r t B l a n k
