Milwaukee MI 404 User manual

USER MANUAL
MI 404
Free & Total Chlorine
and pH 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 nstrument. Please read it carefully
before using the meter. This instrument is in
compliance with directives.
SPECIFICATIONS:
Range 0.00 to 5.00 mg/L Cl2Cl2
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 interfere-
nce filter
Method Adaptation 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
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• After a few seconds the display
will show “-0.0-”. The meter is
now zeroed and ready for measurement.
7• Remove the cuvet.
8• For free chlorine measurement: 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 swirl gently.
9• Immediately reinsert 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
concentration
in mg/L of free chlorine.
12• Then, for total chlorine measurement,
remove the cuvet and add to the
reacted sample 3 drops of DPD 3.
Replace the cap and swirl gently.
13• Reinsert the cuvet into the holder and
ensure that the notch on the cap is
positioned securely into the groove.
14• Wait for 2 minutes and 30 seconds then
press READ and “SIP” will blink during
measurement.
15• The instrument directly displays
concentration in mg/L of total chlorine.
Interferences:
• Bromine (positive error)
• Chlorine dioxide (positive error)

• Iodine (positive error)
• Oxidized Manganese (positive error)
• Chromium (positive error)
• Ozone (positive error)
• 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
rapidlyfade. 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 reagent.
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 beperformed.
The blinking “BAT” indicates
that 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 signal-
to-noise ratio. In this case
press ZERO again.
• “no L”, the instrument
cannot 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 prepara-
tion of the zerocuvet.
• “L Hi”, there is too much
light to perform a measure-
ment. 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 zerocuvet are inverted.
• “ZErO”, a zero reading was
not taken. Follow the instruc-
tion in the measurement
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
maximum concentration
indicates an over range
condition. The concent-
ration 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.
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.
ACCESSORIES:
MI504-100 Free & Total 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.