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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 information for the correct use of the instrument.
Please read it carefully before using the meter.
This instrument is in compliance with directives.
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.
SPECIFICATIONS:
ISTMI411 03/05
MEASUREMENT PROCEDURE:
1• Turn the meter on by pressing
ON/OFF. The last selected
parameter is displayed on the Liquid 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.
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 displayed as “Cl” (chlorine) or “PH” on
the display.
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
Battery Type 1 x 9 volt
or
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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 reagent
set (100 tests)
MI509-100 pH reagent (100 tests)
MI511-100 Free & Total Chlorine and pH
reagent set (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.
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 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 concentration of
the sample is beyond the
programmed range: dilute
the sample and re-run the
test.
13• Reinsert the cuvet into the holder and posi-
tion securely into the groove.
14• Wait for 2 minutes 30 seconds then press
READ and “SIP” will blink during measurement.
15• The instrument dirrectly displays concentra-
tion in mg/L of total chlorine.
For pH measurement
16• Fill a cuvet with 10 mL of unreacted
sample up to the mark.
17• Add 5 drops of pH-0 reagent. Re-
place the cap and shake gently.
18• Insert the cuvet into the holder and
ensure that the notch of the cap is
positioned securely into the groove.
19• Press READ and “SIP” will blink during
measurement.
20• The instrument dirrectly display the pH value.
GUIDE TO DISPLAY CODES:
This prompt appears for 1
second each time the instrument is turned on.
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.
ISTMI411 03/05
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