11
Under range. A blinking "0.00" indicates that the sample absorbs
less light than the zero reference. Check the procedure and make
sure you use the same cuvet for reference (zero) and measurement.
A flashing value of the maximum concentration indicates an
over range condition. The concentration of the sample is beyond
the programmed range: dilute the sample and re-run the test.
A flashing value lower than the maximum concentration indicates
a low signal-to-noise ratio condition. In this case accuracy of the
result is not guaranteed. Repeat the
measurement procedure
.
The instructions listed below should be carefully followed during testing to ensure best accuracy.
• For a correct filling of the cuvet: the liquid in the
cuvet forms a convexity on the top; the bottom of
this convexity must be at the same level of the
10 mL mark.
• Proper use of the powder reagent packet:
(a) use scissors to open the powder packet;
(b) push the edges of the packet to form a spout;
(c) pour out the content of the packet.
(a)
(b)
(c)
GENERAL TIPS FOR AN ACCURATE MEASUREMENT
14
• Select the parameter code for free chlorine “701”
ot total chlorine “711” by holding ZERO/SET
(see pag. 13).
• Fill the cuvet with 10 mL of unreacted sample, up
to the mark, and replace the cap.
• Place the cuvet into the holder and ensure that
the notch on the cap is positioned securely into
the groove.
• Press ZERO/SET and “SIP” will blink on the
display.
• After a few seconds the display will show
“-0.0-”. The meter is now zeroed and ready for
measurement.
• Remove the cuvet.
• Add the content of one packet of the specific
test reagent, for:
Free Chlorine:
Total Chlorine:
1 packet of
1 packet of
HI 93701-0
HI 93711-0
• Replace the cap and shake gently for 20 seconds
(or 2 minutes in case of seawater analysis)
• Replace the cuvet into the holder and ensure
that the notch on the cap is positioned securely
into the groove.
or
MEASUREMENT PROCEDURE
