Milwaukee MI 411 User Manual

USER MANUAL

MI 411

Free & Total Chlorine

and pH Meter

Dear Custom er ,
Thank you for choosing a Martini product. This
manual will provide you wit h th e necessary
information for the correct use of the instrument.
Please read it c arefully before us ing the meter.
This instrument is in compliance with

directives.

SPECIFICATIONS:
Free & Total Chlorine

Range 0.00 to 5.00 mg/L Cl2
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 an d St an d ar d
Method 450 0-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 l amp
Light Detector Silicon Photocell and 525 nm

narrow band interference
filter

Environment 0 to 50°C (32 to 122°F);

100% RH max.

Battery Type 1 x 9 volt
Auto-S hut of f After 10 ' of no n -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 displayed as “Cl”
(chlorine) or “PH ” on the di splay.

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• Choos e the parameter that
you want t o m easure.
3• Fill the cuvet with 10 mL of

unreact ed sample, up t o 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” wi ll b link
on the display.
6• After a few sec onds the display wi ll
show “-0.0-”. The met er is no w
zeroed and ready for meas urement.

For Free Chlor i ne m easurement

7 •Add 3 drops of DPD 1 reagent and 3
drops of DPD 2 reag ent to an empty cuvet.
8• Immediately add 10 mL of unreacted
sample. Replace the cap and shake gently.

9• Immediately r einsert th e cuvet into the

holder and ensure that th e notch on the
cap is positioned securely on the groove

10• Press READ and “SIP“ will b li nk during

measurement.

11• The in s trument directly displays

concentration in mg/L of free or total
chlorine.

Interferences:

• Bromin e (positi ve error)

• Chlor ine dioxid e (positive error)

• Io dine (posi tive error)

• Oxidized Manganese (positive error)

• Chromiu m (positive er ror)

• Ozone (p ositive error)

For Total Chl orine meas ure me nt

12• Remove the the cuvet and add to
the reacted sample 3 drops of
DPD 3 reagent. Replace th e cap
and swirl gently.

13• Reinsert the cuvet int o the holder and
position securely into the groove.

14• Wait for 2 minutes 30 seconds then press

READ and “SIP” will blink during

measurement.
15• The instrument dirrect ly displays
concentration i n mg/L of total chl orine.

For pH measur em e nt

16• Fill a cuvet with 10 mL of

unreacted sample up to the
mark.

17• Add 5 drops of pH-0 reagent.

Replace the cap and shake
gently.

18• Insert the cuv et into t he hold er

and ensure that the notch of
the cap is positioned securely into the

groove.
19• Pres READ and “ SIP” will
b link durin g measur ement.
20• The instrum ent d ir r ect ly
d isp lay t h e pH valu e.

GUIDE TO DISPL A Y COD ES:

This prompt app ears for 1
second each time the
instrum ent is t ur ned on.

Sampling In Progress.
Flashing “SIP” prompt
appears each time
the meter is p erf or m ing a measurem ent.

“-0.0-”, the meter is in
a zeroed s t ate and
measur ement can
beperformed.

The blink ing “B AT” ind ic at es
thatb th e battery v oltage is
getting low an d th e batt er y
needs to be replaced.

“-bA-”, the battery is dead
and must be repl aced. Onc e
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 de aler or th e nearest
Martini Customer Service
Center.

ERROR MESSAGES
On zero reading

• Blinking “-0.0-” indicates
that the zeroing procedure
failed due to a low signal-

tonoise ratio. In this case
press ZE RO again.

• “no L”, the instrument
cannot adjust the light
level. Please check that
the sam ple does not contai n any debris.

• “L Lo”, there is not enough light to perform a
measurement. Pleas e c heck t h e pr epar ation
of the zerocuvet.

• “L Hi”, there is too much
light to perform a
measurement. Please
check the preparation of t he zero cuvet.

On sampl e reading

• “-SA-”, there is too m uch

light for the sample
measurement. Please
check if the right sample
cuvet is inserted.

• “Inv”, the sample and

the zero cuv e t are inver ted.

• “ZErO”, a zer o readi ng w as
not taken. Follow the
instruction in the
measurement procedure
for zeroi ng them eter.

• Under range. A blinking “0.00”

indicates that the sample absorbs
less light than the

zero r eference. Check the
procedure and make sure
you use the same cuvet for
reference (zero) and me asurement.

• 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 an d re-run t he test.

BATTERY REPLACEMENT

Bat tery replacem en t mus t on ly tak e place in a
non-haz ardous en vir onment. S i m pl y r otat e t h e
battery cover on t he back of
the meter. Detach
the battery from
the terminals and
attach
a fresh 9V battery
while paying
attenti on to
the cor rect 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