Milwaukee MW101 User manual

USER MANUAL
PORTABLE pH METER
MODEL: MW101
WARRANTY:
This instrument is warranted from all efects in materials
and manufacturing for a period of two years from the date
of purchase.
The electrode is warranted for a period of six months.
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 parts to
either distributor or our office and the repair will be
effected free of charge.
Note: We reserve the right to modify the design,
construction and appearance of our products without
advance notice.
OPERATION:
• The meter is supplied complete with a 9V
battery. Slide off the battery compartment
cover on the back of the meter. Install the
battery into the battery clip connector while
observing polarity.
• Always remove the electrode protective
cap before taking any measurement. If
the electrode has been left dry, soak the
tip (bottom 2.5 cm) in rinse solution
(M10000B) for a few minutes to reactivate
it.
• Connect the pH electrode
to the BNC socket on the
top of the meter.
• Turn the instrument on by
pressing the ON/OFF key.
• Make sure that the meter
has been calibrated before
taking any measurements
(see Calibration Procedure).
• Set the temperature knob to
the value of testing solution
(measured with help of an
accurate thermometer).
• Immerse the tip (2.5 cm) of the
pH electrode into the sample
and stir gently.
• After completing
measurements, switch the
meter off and store the electrode
with a few drops of storage
solution (MA9015) in the
protective cap.
CALIBRATION PROCEDURE:
A) Preparation:
Two calibration buffers are required
1. pH 7.01 (MA9007)
2. pH 4.01 (MA9004) if you are measuring
in acid range (pH 0 - pH 7) or pH 10.01
(MA9010) if you are measuring in alkaline
range (pH 7 - pH 14).
Use two beakers for each pH buffer. One
beaker for rinsing the electrode, the other
for calibration.
Use a thermometer with 1ºC accuracy to
measure the temperature of calibration
solution.
B) Procedure:
• Remove the protective cap
from the electrode. Rinse the tip
of the electrode with
some pH 7.01 solution, then
immerse the pH electrode into a
pH 7.01 buffer solution.
• Take the temperature of the
buffer solution with a thermometer
and set the
temperature knob to the
measured temperature (e.g.
15ºC).
• Adjust the OFFSET trimmer
(pH 7) on the front panel, with a
small screwdriver until the
LCD shows the pH value at
temperature of the buffer (see
the pH versus temperature
chart).
E.g. in this case, if the
temperature is 15ºC, the meter
display should be adjusted to
read “pH 7.04”.
• Now rinse the pH electrode in
the first pH 4.01 beaker, then
immerse it into the second pH 4.01 beaker
or follow the same procedure if using pH
10.01 buffer.

• Adjust the SLOPE trimmer
(pH4/10) on the front panel,
with a small screwdriver,
until the LCD shows the pH
value of the buffer at the
temperature of measurement
(see the pH versus
temperature chart).
E.g. in this case, if the
temperature is 15ºC, the meter display
should be adjusted to read “pH 4.00” (or pH
10.01 would be adjusted to 10.12 pH).
Calibration is now complete.
pH VERSUS TEMPERATURE CHART:
BATTERY REPLACEMENT:
When the battery
becomes weak the
meter will display “ ”.
When the low battery
indicator appears,
only a few hours of
battery life remain.
A low battery will result
in unreliable
m e a s u r e m e n t s .
Prompt battery
replacement is
required.
Battery replacement
must only take place
in a non-hazardous area using an alkaline
9V battery.
Turn the meter off, slide the battery
compartment cover located at the rear of
the meter off and replace the 9V battery
with a new one. Make sure the battery
contacts are fully engaged in the connector,
seat the battery in its compartment and
replace the cover.
OPTIONAL ACCESSORIES:
MA9004 pH4.01 buffer solution,
220 mL bottle
MA9007 pH7.01 buffer solution,
220 mL bottle
MA9010 pH10.01 buffer solution,
220 mL bottle
MA9015 Electrode storage solution,
220 mL bottle
MA9016 General cleaning solution,
220 mL bottle
M10000B Rinse solution, 20 mL
sachet (25 pcs.)
SE220 pH electrode with BNC
connector and 1 m cable
MA950 Portable meter wall mounting kit
SPECIFICATIONS:
MW 101
RANGE 0.00 to 14.00 pH
RESOLUTION 0.01 pH
ACCURACY (@25°C) ±0.02 pH
TEMPERTURE Manual setting
COMPENSATION 0 to 50ºC
CALIBRATION Manual, 2-point
with use of Offset and Slope trimmers
pH ELECTRODE SE220 (included)
ENVIRONMENT 0 to 50°C, 95% RH max.
BATTERY TYPE 1 x 9V alkaline (included)
BATTERY LIFE approx. 70 hours of use
DIMENSIONS 143 x 80 x 32 mm
WEIGHT 220 g (with battery) meter only