16
17
• Place the cuvette into the cuvette holder and
ensure that the notch on the cap is positioned
securely into the groove.
• Press
ZERO/CFM
and the lamp, cuvette and
detector icons will appear on the display,
depending on the measurement phase.
• For Total Hardness: Place the ZERO sample
into the holder and ensure that the notch on
the cap is positioned securely into the groove.
Press
ZERO/CFM
and the lamp, cuvette and
detector icons will appear on the display,
depending on the measurement phase. After a
few seconds the display will show
“-0.0-”
.
Remove the ZERO sample and insert the READ1
sample into the instrument. Press and hold
READ/ /TIMER
for three seconds
.
The display
will show the countdown prior to measurement.
The beeper is playing a beep at the end of
countdown period. Alternatively, wait for 30
seconds. The lamp, cuvette and detector icons
will appear on the display, depending on the
measurement phase, then the instrument will
display the level of Magnesium hardness in
mg/L CaCO
3
(togheter with “n”).
• After a few seconds the display will show
“-
0.0-”
. The meter is now zeroed and ready for
measurement.
• Remove the cuvette.
• Add the specific test reagent for each parameter:
Total hardness: the third cuvette (nothing is
added)
Iron LR: Fill one graduated mixing cylinder up
to the 25 mL mark with the sample.
Add the content of one packet of
HI 93741-0
reagent, close the cylinder and shake well for
30 seconds.
Fill a cuvette with 10 mL of the reacted
sample up to the mark and replace the cap.
To compensate the meter for the sample turbidity or color, the measurement takes place in two
phases. First, the meter is zeroed using the unreacted sample. After the reagents are added the
reacted sample is measured.
Important note:
Free and Total Chlorine have to be measured separately with fresh unreacted
samples if both values are requested.
MEASUREMENT PROCEDURE
• Turn the meter on by pressing
ON/OFF
. The
display briefly shows all tags on.
• When the beeper sounds briefly and the LCD
displays dashes, the meter is ready. The
blinking
“ZERO”
indicates that the instrument
needs to be zeroed first.
• Pay attention to the selected range.
To change the range, simply press
RANGE/
GLP/
.
• For Total Hardness: Fill a graduated beaker
up to the 50mL mark with the sample. Add
0.5 mL of
HI 93719A-0
Calcium And
Magnesium Reagent indicator solution and
mix. Add 0.5 mL of
HI 93719B-0
Alkali
solution for Calcium and Magnesium and mix.
Fill three cuvettes with 10mL of sample each.
Add 1 drop of
HI 93719C-0 EDTA
solution
to one cuvette, replace the cap and swirl the
solution. This is the ZERO sample. Add 1 drop
of
HI 93719D-0 EGTA
solution to the second
cuvette, replace the cap and swirl the solution.
This is the READ1 sample.
For Iron LR: Fill one graduated mixing cylinder
up to the 25 mL mark with deionized water.
Add the content of one packet of
HI 93741-0
reagent, close the cylinder and shake well for
30 seconds. This is the blank.
Fill a cuvette with 10 mL of the blank up to
the mark and replace the cap.
#1
#2
#3
#1
#2
or