IM 50.560CA UA (B/4-03)
DEPOLOX
®
3
PLUS
RESIDUAL ANALYZER
48
justed to “- 0.08 mg/l fluoride” because the value is to come down
from 0.28 mg/l to 0.20 mg/l.)
e. Return to the basic display by pressing the
●
key twice.
•
Calibration at 0.20 mg/l:
a. Starting at the basic display press the
F
key until the “CALI-
BRATION” menu is displayed. Press the
▼
key until the “Fluor
zero” menu is found.
b. Withdraw the fluoride sensor. Fill 10 to 20 ml “0.20 mg/l” buffer
solution into a 100 ml beaker. Dip the sensor at least 20mm deep
in the buffer solution 0.20 mg/l and agitate lightly until the dis-
played value remains constant.
c. Press the
E
key.
d. Press keys
▼
or
▲
until the displayed value agrees with the value
of the buffer solution. Store this value using the
E
key.
•
Calibration at 2.00 mg/l:
a. Rinse the sensor in distilled water (in order to avoid spreading
the buffer solution).
b. Press the key
▼
until the “Fluor span” menu is reached.
c. Fill 10 to 20ml “2.00 mg/l” buffer solution into another beaker.
Dip the fluoride sensor at least 20mm deep in the buffer solution
and agitate lightly until the displayed value remains constant.
d. Press the
E
key to open the “Fluor Span” menu.
e. Press keys
▼
or
▲
until the displayed value agrees with the value
of the buffer solution. Store this value using the
E
key. The mea-
suring cell is now calibrated.
f. Refit the sensor into the flow block.
g. Dispose of the buffer solutions, rinse with enough water.
h. Return to the basic display by pressing the
●
key twice.
In case of error both calibration points must be calibrated again.
