Martini Instruments MI 406 User Manual

USER MANUAL
MI 406
Free Chlorine 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:

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
Light Source Tungsten lamp
Light Detector Silicon Photocell and 525 nm
narrow band interference filter
Method Adaption of the USEPA
method 330.5 and Standard
Method 4500-Cl G.
Environment 0 to 50°C (32 to 122°F);
100% RH max.
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
ISTMI406 03/05

MEASUREMENT PROCEDURE:

1• Turn the meter on by pressing ON/OFF.
2• When the LCD displays "- - -",
the meter is ready.
3• Fill the cuvet with 10 mL of
unreacted 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• Wait a few seconds and the
display will show "-0.0-". The
meter is now zeroed and
ready for measurement.
7• Remove the cuvet from the meter.
8• Add 3 drops of DPD 1 indicator and 3 drops
of DPD 2 buffer to an empty cuvet.
Immediately add 10 mL of unreacted sample.
Replace the cap and shake gently.
9• Replace the cuvet into the holder and
ensure that the notch on the cap is posi-
tioned securely into the groove.
10• Press READ and "SIP" will blink
during measurement.
11• The instrument directly displays
the concentration in mg/L of free chlorine.

Interferences

• Positive error:
- Bromine
- Chlorine Dioxide
- Iodine
- Oxidized Manganese and Chromium
- Ozone
• Alkalinity above 250 mg/L CaCO or acidity
3
above 150 mg/L CaCO will not reliably
3
develop the full amount of color or it may
rapidly fade.
To resolve this, neutralize the sample with
diluted HCl or NaOH.
• In case of water with hardness greater
than 500 mg/L CaCO , shake the sample
3
for approximately 2' after adding the
powder reagent.