USER MANUAL
MI 411
Free & Total Chlorine
and pH Meter
Dear Customer,
Thank you for choosing a Milwaukee
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.
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 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.
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
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.
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
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. Open it.
8• Add the content of one packet of reagent.
Use
MI526-100 for free chlorine or
MI524-100 for total chlorine
9• Replace the cap and
swirl gently for 20
seconds. Reinsert the
cuvet into the holder
and ensure that the
notch on the cap is positioned
securely into the groove.
