USER MANUAL
MI 408
Iron High
Range Meter
Dear Customer,
Thank you for choosing a Martini product. This
manual will provide you with the necessary infor-
mation 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
Fe
Resolution
0.01 mg/L
Precision
±0.03 mg/L @ 1.50 mg/L
Light Source
Tungsten lamp
Light Detector
Silicon Photocell and 525 nm
narrow band interference filter
Method
Adoption of the USEPA
method 315 B and Standard
method 3500 - Fe B
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:
ISTMI408 03/05
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 dis-
play will show “-0.0-”. The
meter is now zeroed and
ready for measurement.
7• Remove the cuvet. Open it.
8• Add 8 drops of Fe-0 reagent and shake
gently.
9• Reinsert the cuvet into the
holder and ensure that the
notch on the cap is positioned
securely into the groove.
10• Press and hold READ for 3
seconds and the display will
show the countdown prior to
the measurement.
Alternatively, wait for 5 minutes
and just press READ. In both
cases “SIP” will blink during
measurement.
11• The instrument directly displays
concentration in mg/L of iron.
Interferences
•
Alkalinity above 1,000 mg/L (CaCO
3
) will
slow down color development. To resolve
this neutralize the sample with diluted HCl.
•
Calcium (Ca
2+
) above 1,000 mg/L (CaCO
3
)
•
Magnesium (Mg
2+
) above 10,000 mg/L
(CaCO
3
).
•
Molybdate, Molybdenum above 25 mg/L
•
High Sulfide (S
2+
) concentration.
•
Silica (SiO
2
) above 100 mg/L may slow
down color development.
