Dear Customer,
Thank you for choosing a Milwaukee Instruments
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.
SPECIFICATIONS
Range
0.00 to 9.99 mg/L (NH
3
- N)
Resolution
0.01 mg/L
Precision
±0.30 mg/L @5.00 mg/L
Light Source
Blue LED 466 nm
Light Detector
Silicon Photocell and 466 nm narrow
band interference filter
Method
Adaptation of Nessler method
Environment
0 to 50 °C (32 to 122 °F)
100% RH max
Battery Type
9 volt (1 pc)
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 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.
▶
10 ml
▶
8. Add 4 drops of NH
3
-1 (10 drops in case of seawater
analysis) and swirl gently.
9. Add 4 drops of NH
3
-2 (10 drops in case of seawater
analysis). Replace the cap and swirl gently.
▶
10 mL
▶
NH3 1
NH3 2
x 4
x 4
+
10. Immediately reinsert the cuvet into the holder and
ensure that the notch on the cap is positioned
securely into the groove.
Press and hold READ for 3 seconds and the display
will show the countdown prior to the measurement.
Alternatively, wait for 3 minutes and 30 seconds and
just press READ. In both cases “SIP” will blink during
measurement.
3’30”
11. The instrument directly displays the concentration
in mg/L of ammonia nitrogen (NH
3
-N).
12. To convert the reading to mg/L of ammonia (NH
3
),
multiply by a factor of 1.216.
Interferences
y
Organic compounds like: chloramines, various
aliphatic and aromatic amines, glycine, (positive
error). To eliminate these interferences distillation
is required.
y
Organic compounds like: aldehydes, alcohols (e.g.
ethanol) or acetone (negative error). To eliminate
these interferences distillation is required.
y
Sulfide (S²-): may cause turbidity.
y
Hardness above 1 g/L as Calcium Carbonate
(CaCO
3
).
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 be
performed.
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 Milwaukee Customer
Service Center.
ERROR MESSAGES
On Zero Reading
y
Blinking “-0.0-” indicates that the
zeroing procedure failed due to a
low signal-to-noise ratio. In this
case press ZERO again.
y
“no L”, the instrument can not
adjust the light level. Please
check that the sample does not
contain any debris.
y
“L Lo”, there is not enough light to
perform a measurement. Please
check the preparation of the zero
cuvet.
y
“L Hi”, there is too much light to
perform a measurement. Please
check the preparation of the zero
cuvet.
