EC
500-en-G
B
_v2.7 12/16
5
C
h
a
ng
i
ng
Meas
u
reme
n
t
Fun
cti
on
The meter can be set to measure pH,
C
onduct
i
v
i
ty, T
DS
or
S
al
i
n
i
ty.
To change the mode:
1.
P
ress and Hold the
MO
DE
/
H
O
L
D
button for 2 seconds and the d
i
splay w
i
ll beg
i
n to scroll
through the un
i
ts.
µ
S
(
C
onduct
i
v
i
ty);
p
H
;
pp
m
S
(
S
al
i
n
i
ty);
pp
m
(T
DS
);
m
g
/l
(T
DS
);
N
o
t
e
:
The “HOL
D
” funct
i
on cannot be on when chang
i
ng the measurement funct
i
on. If “HOL
D
”
i
s
d
i
splayed
i
n the lower left corner of the d
i
splay, br
i
efly press the MO
DE
/
H
O
L
D
button to turn
i
t off.
2. When the des
i
red un
i
ts are d
i
splayed, release the MO
DE
/
H
O
L
D
button.
T
D
S
C
o
m
p
e
n
sati
on
R
ati
o
The T
DS
value
i
s determ
i
ned by mult
i
ply
i
ng a conduct
i
v
i
ty read
i
ng by a known rat
i
o factor. The
meter allows for select
i
ng a convers
i
on rat
i
o
i
n the range of 0.4 to 1.0. The rat
i
o var
i
es w
i
th the
appl
i
cat
i
on, but
i
s typ
i
cally set between 0.5 and 0.7.
Note: The stored rat
i
o w
i
ll br
i
efly appear
i
n the lower temperature d
i
splay when the meter
i
s f
i
rst
turned on, or when chang
i
ng measurement funct
i
on to T
DS
.
N
o
te
:
I
n
t
h
e
S
ali
n
ity m
od
e t
h
e rati
o
is 0.4 t
o
0.6 a
u
t
o
.
To change the rat
i
o, wh
i
le
i
n the T
DS
measurement mode (ppm or mg/l):
1.
P
ress and release the
C
A
L
/
REC
A
LL
button tw
i
ce
i
n success
i
on. The stored
rat
i
o w
i
ll appear
i
n the d
i
splay.
2.
P
ress the MO
DE
/
H
O
L
D
button to
i
ncrease the rat
i
o value
i
n steps of 0.1.
3. When the des
i
red rat
i
o
i
s d
i
splayed, press and release the
C
A
L
/
REC
A
LL
button to store the value and return to the normal mode.
4. If no buttons are pressed for 5 seconds, the meter returns to measure mode.
S
t
o
ri
ng
R
ea
d
i
ng
s
1.
P
ress the MO
DE
/
H
O
L
D
button to store a read
i
ng. The storage locat
i
on
number w
i
ll be d
i
splayed on the lower d
i
splay, wh
i
le the ma
i
n d
i
splay shows
the stored read
i
ng. The meter w
i
ll enter the HOL
D
mode and the “HOL
D
”
i
nd
i
cator w
i
ll appear.
2.
P
ress the MO
DE
/
H
O
L
D
button aga
i
n to ex
i
t the HOL
D
mode and return to
normal operat
i
on.
3. If more than 25 read
i
ngs are stored, prev
i
ously stored read
i
ngs (start
i
ng w
i
th
number 1) w
i
ll be overwr
i
tten.
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