Milwaukee MI 106 User Manual

USER MANUAL

MI 106

pH/mV/Temperature

Portable Meter

GENERAL OPERATION

• The meter is s upp l ied
complete with a 9V
battery. Remove the
battery compartment
cover on t he bac k of th e
meter and install the
battery while paying
attenti on to its polarity.

• Connect the
MA923D/1 probe to the
meter.

• Turn the instrument
on by pressing the
ON/OFF k ey. At star t-up,
the L CD
shows the p ercentag e of the remaining
batte ry life f or a few seconds , and then
the current meas urement.

• Always remove the electrode
protective cap before taking any
measur ement. If the el ectrod e has been
left dry, soak the tip (bottom 2.5 cm) i n
M10000 rinse solution for a few minutes.

• The temperature reading can be
displayed in °C or °F unit; to select the
desired scale, press and hold the
“ON/OFF” key until “TEMP” and the
current temper ature un it are dis played
on the secondary LCD. Use the “SET”
button t o select t he unit and then pr ess
the “O N/OF F” k ey a co uple o f tim es to
return to normal mode.

• To acti vate t he HO LD fu nction, keep
pressed t he “H OLD” key. The m easur ed
value will be fr ozen on the d isplay and
the “HOLD” message appear on the
second ary LC D.

• After measurements, switch the
met er of f by pr essin g the “ON/ OFF” key.
The “OFF” message appears on the
LCD; r elease the button.

• After use, replace the electrode
protective cap with a few drops of
storage solution.

TAKING pH MEASUREMENTS

• Select t h e “ pH” m od e w ith t h e “ S E T ”
key.

• Immers e th e t ip ( 2.5 c m) of t h e pr obe
in the sample and s tir gently.

• Read the pH value when the c lock
symbol s tops blinking.
Note: Before taking any measur ement,
make sure that the meter has been
calibr ated (t he “CA L” tag is disp layed on
the lef t l ower corn er of the LCD).

pH CALIBRATION PROCEDURE

It is recommended to recalibrate the
meter at least onc e ever y thr ee w eek s .
A) Preparation, Buffer solutions:

1. pH 7. 01 / 6.86 (MA9007 / MA9006)

2. pH 4.01 (MA9004) for acidic
calibration
(pH < 7) or pH 10.01 / 9.18 (MA9010 /
MA9009) for alkali ne range ( pH > 7).
Use two beak ers for eac h buff er solution:
one beaker for rinsing the probe, the
other for calibration. In this way the cr oss
contamination between solutions is
minimized.
B) P rocedur e:

• Select t h e “ pH” m od e w ith t h e “ S E T ”
key.

• Select the calibration buffer set:
press and hold the “ON/ OFF” key until
the LCD shows “TEMP”. Press again this
key and the “BUFF” message will
appear; t h en s el ect th e d es ir ed b uff er set
with the “ SET” k ey: “7.01 pH BUFF” (f or
standar d solut i ons: p H 4.0 1, 7.0 1, 10. 01)
or “6.86 pH BUFF” (f or NIST s olutions:

pH 4.01, 6.86, 9.18). Press the
“ON/OFF” key again to exit.

• Remove the protective cap, then
immerse the prob e in th e first buff er (pH

7.01 or 6.86).

• Press and hold the “ON/OFF” key
until “CAL” is displayed on the lower
LCD.

• Release the button
and the message “7.01
pH USE” (or “6.86 pH
USE” for NI ST buff er set )
will be displayed.

• The meter automatically recognizes
the buffer value: if a valid buffer is
detect ed, then its value is displayed on
the LCD together with
the “REC” message,
and the fir st calibr ation
point is accepted.

• The meter will then
require the second
buffer by showing the
“pH 4.01 USE”
message.
Immers e the probe in th e sec ond buf fer
solution (pH 4. 01 or 10.01 or 9.18). If a
valid buffer is recognized, the meter
completes the calibration procedure,
shows the “OK 2” message for a few
seconds, then returns to the normal
mode.

Notes:

• If no valid b uffer is
detected, the LCD will
show the “WRNG”
message.

• For exiting the calibration after the
first point is accepted, press the

“ON/OF F” button: the LCD w ill show th e
“OK 1” m essage f or 1 secon d and then
returns to the norm al mode. If us ing pH

4.01 or 1 0.0 1 (or 9.1 8) b uff er for t h e first
calibration point, the meter will exit the
calibration mode after recognizing the
buffer value and showing the “OK 1”
message for 1 second.

• To quit t he c ali brat ion pr ocedur e and
return t o the last data, pr ess “ON/OFF”
after entering the calibration mode and
before the first point is accepted. The
secondary LCD shows the “ESC”
message for 1 second and the meter
returns to the normal mode.

• To clear a previous calibration and
reset to the default value, press the
“SET” k ey after entering the calibration
mode and before the first point is
accepted. The secondary LCD shows
the “CLR” message for 1 second, the
meter resets to the default calibration
and the “CAL” tag on the LCD
disappears.

TAKING ORP MEASUREMENTS

• Remove the protective cap and
immerse the electrode in MA9016
cleaning solution for a few minutes.

• Select t he ORP (mV) m ode wit h th e
“SET” key.

• Place the prob e into the sample to b e
tested, stir gently and wait for reading
stabilization (the clock symbol on the
LCD dis appears) .
Note: The ORP range is factory
calibrated. Contact your dealer for
recalibration, if needed.
Note: ATC t ag tur ns off b ecaus e t he m V
readings are not temperature
compensated.

BATTERY REPLACEMENT

The met er shows t he remaining b attery
percent age every time it is switc hed on.
When th e batter y level is b elow 5%, the
battery s ymbol on t he bottom left of the
LCD lights up to indic ate a low battery
condition.
The meter is also provided with BEPS
(B atter y E r r or Pr e v en t i on S ys t em ) , w h ic h
automatically switch es the met er off if t he
battery level is so low to cause
erroneous readings. It is recomm ended
to repl ac e imm ed iately the batt er y.
Turn the meter off,
remove the battery
compartment cover
from the rear of the
met er an d r eplac e t he
rundown 9V battery
with a new one.
Install the battery
while paying attention
to its polarity and
reattach the cover.

WARRANTY

This instrument is warranted against defects in
materials and manufacturing for a period of two
years from the date of purchase. Probe is
warranted for 6 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.
Damages due to accidents, misuse, tampering or
lack of prescribed maintenance are not covered.

ACCESSORIES
MA923D/1 Combination amplified

pH/ORP/Temperature
probe with DIN
connector and 1 m cable

M10004B pH4.01 buffer solution,

20 ml sachet, 25 pcs.

M10006B pH6.86 buffer solution,

20 ml sachet, 25 pcs.

M10007B pH7.01 buffer solution,

20 ml sachet, 25 pcs.

M10009B pH9.18 buffer solution,

20 ml sachet, 25 pcs.

M10010B pH10.01 buffer solution,

20 ml sachet, 25 pcs.

MA9004 pH4.01 buffer solution,

230 ml bottle

MA9006 pH6.86 buffer solution,

230 ml bottle

MA9007 pH7.01 buffer solution,

230 ml bottle

MA9009 pH9.18 buffer solution,

230 ml bottle

MA9010 pH10.01 buffer solution,

230 ml bottle

MA9015 Electrode storage

solution, 230 ml bottle

MA9016 Electrode cleaning

solution, 230 ml bottle

M10000B Electrode rinse solution,

20 ml sac het, 25 pcs.

SPECIFICATIONS

RANGE -2.00 to 16.00 pH

-2000 to + 2000 mV

-5.0 to 105.0 ºC
or 23.0 to 221.0 °F

RESOLUTION 0.01 pH / 1 mV

0.1 °C or 0.1 ° F

ACCURACY
(@25°C) ±0.02 pH / ±2 mV

±0.5°C up to 60°C;

±1°C outside
±1°F up to 140 °F; ±2°F
outside

TYPICAL EMC
DEVIATION ±0.02 pH / ±2 mV

±0. 2 °C or ±0. 4 °F

TEMPERATURE
COMPENSATION

Automat ic, from -5 to

80°C

pH CALIBRATION Aut omati c, 1 or 2­ point
ORP CALIBRATION Factory
calibrated

PROBE (includ e d) MA923D/1

amplified

pH/ORP/temperature

probe

ENVIRONMENT 0 to 50°C; 100% RH

max.

BATTERY 1 x 9V alkaline

(included)

BATTERY LIFE approx. 500 hours of

use

AUTO-OFF after 8 minutes of

non-use

DIMENSIONS 200×85×50 mm
WEIGHT 260 g (with battery)

(*)

The temperature range is limited to 80°C

(176°F) if using the MA923D/1 probe.