USER MANUAL
MI 406
Free Chlorine Meter
Dear Customer,
Thank you for choosing a Martini product. This
manual will provide you with the necessary information for the correct use of the instrument.
Please read it carefully before using the meter.
This instrument is in compliance with directives.
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
SPECIFICATIONS:
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.
9• Replace the cuvet into the holder and
ensure that the notch on the cap is positioned 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 CaCO3 or acidity
above 150 mg/L CaCO3 will not reliably
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 CaCO3, shake the sample
for approximately 2’ after adding the
powder reagent.
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.
ISTMI406 03/05
GUIDE TO DISPLAY CODES:
This prompt appears for 1
second each time the instrument is turned on.
The dashes “- - -” indicates
that the meter is in a ready
state and zeroing can be performed.
Sampling In Progress. Flashing “SIP” prompt appears each
time the meter is performing a
measurement.
“-0.0-”, the meter is in a zeroed state and measurement
can be performed.
The blinking "BAT" indicates
that the battery voltage is getting low and the battery needs
to be replaced.
“-bA-”, the battery is dead and
must be replaced. Once this
indication is displayed, the
meter will lock up. Change the
battery and restart the meter.
“Conf”, the meter has lost its
configuration. Contact your
dealer or the nearest Martini
Customer Service Center.
ERROR MESSAGES
On zero reading
• Blinking “-0.0-” indicates
that the zeroing procedure
failed due to a low signalto-noise ratio. In this case
press ZERO again.
• “no L”, the instrument can-
not adjust the light level.
Please check that the
sample does not contain
any debris.
• “L Lo”, there is not enough
light to perform a measurement. Please check the
preparation of the zero
cuvet.
• “L Hi”, there is too much
light to perform a measurement. Please check the
preparation of the zero
cuvet.
On sample reading
• “-SA-”, there is too much
light for the sample measurement. Please check if
the right sample cuvet is
inserted.
• “Inv”, the sample and the
zero cuvet are inverted.
• “ZErO”, a zero reading was
not taken. Follow the instruction in the measure-
ment procedure for zeroing
the meter.
• 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 maxi-
mum concentration indicates
an over range condition.
The concentration of the
sample is beyond the programmed range: dilute the
sample and re-run the test.
BATTERY REPLACEMENT
Battery replacement must only take place in a
non-hazardous environment.
Simply rotate the battery cover on the back of
the meter.
ACCESSORIES:
MI506-100 Free Chlorine (100 tests)
MI0001 Glass cuvets (2 pcs)
MI0002 Caps for cuvets (2 pcs)
MI0003 Stoppers for cuvets (2 pcs)
MI0004 Tissue for wipping cuvets
(4 pcs)
MI0005 9V battery (1 pc)
WARRANTY
This instrument is warranted against defects in materials and manufacturing for a period of two years
from the date of purchase.
If during this period the repair or replacement of parts
is required, where the damage is not due to negligence or erroneous operation by the user, please
return the meter to either distributor or our office in
the original packing and the repair will be free of
charge.
Damages due to accidents, misuse, tampering or
lack of prescribed maintenance are not covered.
Detach the battery
from the terminals
and attach a fresh
9V battery while
paying attention to
the correct polarity.
Insert the battery
and replace the
cover.
ISTMI406 03/05
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