Martini Instruments MI 411 User Manual

USER MANUAL
MI 411
Free & Total Chlorine
and pH Meter
Dear Customer,
Thank you for choosing a Martini product. This
manual will provide you with the necessary infor-
mation for the correct use of the instrument.
Please read it carefully before using the meter.
This instrument is in compliance with directives.

SPECIFICATIONS:

Free & Total Chlorine
Range 0.00 to 5.00 mg/L Cl
2
Resolution 0.01 mg/L (0.00-3.50 mg/L);
0.10 mg/L (above 3.50 mg/L)
Precision ±0.04 mg/L @ 1.50 mg/L
Method Adaptation of the USEPA
method 330.5 and Standard
Method 4500-Cl G.
pH
Range 6.5 to 8.0 pH
Resolution 0.1 pH
Precision ±0.1 pH @ 7.2 pH
Method Adaptation of the phenol red
method.
Other
Light Source Tungsten lamp
Light Detector Silicon Photocell and 525 nm
narrow band interference filter
Environment 0 to 50°C (32 to 122°F);
100% RH max.
ISTMI411 03/05
Battery Type 1 x 9 volt

Auto-Shut off

After 10' of non-use
Dimensions 192 x 104 x 52 mm
(7.5 x 4.1 x 2")
Weight 380 g

CHANGE PARAMETER

To change parameter between Free
& Total Chlorine and pH, press and
hold for 3 seconds, the ZERO key.
The selected parameter will be dis-
played as "Cl" (chlorine) or "PH" on
the display.
or

MEASUREMENT PROCEDURE:

1• Turn the meter on by pressing
ON/OFF. The last selected
parameter is displayed on the Liq-
uid Crystal Display ("Cl" or "PH").
2• Choose the parameter that you
want to measure.
3• Fill the cuvet with 10 mL of unre-
acted sample, up to the mark,
and replace the cap.
4• Place the cuvet into the holder and
ensure that the notch on the cap
is positioned securely into the
groove.
5• Press ZERO and "SIP" will blink
on the display.
6• After a few seconds the display will show
"-0.0-". The meter is now zeroed and ready
to measure.
For Free Chlorine measurement
7• Add 3 drops of DPD 1 reagent and 3 drops
of DPD 2 reagent to an empty cuvet.
8• Immediately add 10 mL of unreacted sample.
Replace the cap and shake gently.
9• Immediately reinsert the cuvet into the
holder and ensure that the notch on the
cap is positioned securely on the groove
10• Press READ and "SIP" will blink during
measurement.
11• The instrument directly displays concentra-
tion in mg/L of free chlorine.
For Total Chlorine measurement
12• Remove the the cuvet and add to
the reacted sample 3 drops of
DPD 3 reagent. Replace the cap
and swirl gently.