USER MANUAL
pH 58
Pocket-size
pH/OR P /° C/°F Meter
www.milwaukeeinst.com
Automatic Temperature Measuring unit
Compansation Indicat or on main LCD
Instability Indicator Main LCD
Calibration Indicator Temperature
Low Battery Indicator reading
Secondary LCD
OPERATI ONAL GUIDE
• Rem ov e th e el ec tr ode c a p an d im m ers e th e
meter in MA9015 st orage soluti on for 2 hours
to activ ate th e elec t r ode.
• Turn the meter on by pressing th e ON/OFF
button. All t he used segm ents on t he LCD wi ll
be visible for 1 s econd or as long as the button
is pressed.
• Immerse th e electrode i n the solut ion to be
tested. Stir g ently and w ait for the readi ng to
stabilize, i.e. the instability indicator
(hourglass) on t he LCD turns off.
• Select the pH or ORP (mV) mode by
pressing the SE T/HOLD button.
• The displayed pH value is automatically
com p ens at e d for t em p er at ur e. T h e OR P (m V )
value will be displayed on the main LCD, while
the temperature will always be displayed on
the sec ondary L CD.
• To free ze the di splay, whil e in measu rement
mode, press an d hold the SET/HOLD button.
The “HOLD” message appears on the
secondary display and the reading will be
frozen on the LC D. Press any butt on to return
to the norm al me asurement mode.
• To turn the meter off, press the ON/OFF
button. The “OF F” message will appear on
the secondary display. Releas e t he button.
Note:
• Before t aking any m easurem ent, make s ure
the meter is calibrated (t he CA L tag is on).
• Af ter us e alw ays t urn th e met er OFF , rin se
the electrode with water to minimize
contamination and store it with a few drops of
storage (MA9015) or pH7 (M10007) solution in
the protective c ap.
NEVER USE DISTILLED OR DEIONIZED
WATER FOR STORAGE PURPOSE.
CALIBRATION PROCEDURE
The ORP (mV) range is factory calibrated.
Contact the nearest Service Center for
recalibration, if necessary.
For better acc urac y, f requ ent cali brati on of th e
tester is recommended. Calibration is also
necessary after electrode replacement, after
testing aggressive chemicals and where
extrem e accu r acy is r equi red.
• Tu rn the meter on and select the pH mode
with the SET/ HOLD button.
• Press and hol d th e O N/OFF /CAL but t on until
the “OFF” m essage on the sec ondary LCD is
substitut ed by “CAL”. Release t he button.
• The instrum ent enters th e calibration m ode
by displaying “pH 7.01 USE” (or “pH 6.86
USE” if the NIST buf fer set was s elected).
• For a single-point cali bration, imm erse the
electrode in any buffer, i .e. pH 4.01, 7.01 (or
6.86), 10.01 ( or 9. 18).
• The meter activates the automatic buffer
recognition. If no valid bu ffer is detected, the
meter keeps the USE indic ation active for 12
seconds, and then replaces it with WRNG,
indicating th at the sample being measu red is
not a valid buffer. Ot herwise, if a valid buffer is
detected, then its value is shown on the
primary display, and REC appears on the
secondary LCD.
• If the pH 7.01 (or p H 6.86) w as used, press
the S ET but ton to exit th e Calib ration mod e
and the “OK 1” message will appear on the
display. The first calibration point is stored and
the meter returns to normal measurement
mode.
For better accuracy, it is always
recommended to perform a 2-point
calibration.
• For a two-point calibration, immerse the
electrode in pH 7.01 (or pH 6.86) buffer
solution.
• After the first point has been accepted, t he
meter will t hen ask for the second bu ffer and
the messag e “pH 4. 01 USE” will appear.
• Rinse the electrode and imm erse it in the
second solution (pH 4.01, 10.01 or 9.18).
• If a vali d buff er va lue i s det ected , th e REC
message is displayed and the meter
completes the calibration proc edure. The LCD
shows the accepted value with the “OK 2”
message and the instrument returns to the
norm al m easur ement mode. O ther wise, if no
valid buffer is d etected, the meter displays the
WR NG m essage.
Note: When the calibration procedure is
completed, the CAL t ag i s t urned on.
• To quit the proced ure and return t o the last
cali brati on data, after enter ing the cali brati on
mode press th e ON/ OF F but ton.
The secondary LCD displays “ESC” for 1
second and then the meter returns to the
normal mea surement mode.
• To reset to the default values and clear a
previous calibration, press the SET/HOLD
button aft er ent ering th e c alibration mode and
bef ore t he first poi nt is accepted.
The secondary LCD displays “CLR” for 1
second, the meter resets to the default
calibration and the CA L tag on th e LCD turns
off.
SETUP
Setup mode allows the selection of
temperature (°C or °F) and pH buffer set for
calibration. T o enter the S etup mode, press
the ON/OFF button until “CAL” on the
secondary LCD is replaced by “TEMP” and t he
current temperature unit (e.g. TEMP °C).
Then:
• for °C/°F selection: use the SET/HOLD
button; then press the ON/OFF button once to
enter the buffer set selection or twice to ret urn
to the norm al me asurement mode.
• to change the calibration buffer set: after
setting the temperature unit, press ON/OFF
once and select the buffer set (“pH 7.01
BUFF” or “pH 6.86 BUFF” for NIST) by using
the SET/HOLD button. Press ON/OFF to
ret urn to the normal measurement mod e.
ELECTRODE RE PLACE MENT
• Remove th e protect ive c ap and unscr ew the
plastic ring on t he top of the electr ode.
• Pu ll out the MI58P el ectrode and replac e it
with a n ew one.
• Make sur e the gaskets ar e in place bef ore
screwi ng back the ring.
BATTERY REPLACEMENT
Wh en th e b att eri es bec om e w eak, th e b att ery
sym bol on t he L CD w il l l igh t up to ad vi se t hat
only a few hours of w orking tim e is rem aining.
The meter i s als o provided w ith BEPS (Battery
Error Prevention System), which avoids any
erroneous r eadi ngs due to low battery l evel by
automatically sw itching the meter o ff.
It is recommended to replace the batteries
immediately.
To r eplac e the b atter ies u nscr ew the b atte ry
compartment cap and replace all four 1.5V
batteries while paying attention to their
polarity.
Make sure the gasket is in place before
screwing back the cap.
Batteries should only be replaced in a
nonhazardous area using the battery type
specified i n t his instructi on manual.
ACCESSORIES
MI 58P Replaceable electrode for pH 58
M10004B pH 4.01 buffer, 20 ml sachet, 25 pcs.
M10007B pH 7.01 buffer, 20 ml sachet, 25 pcs.
M10010B pH 10.01 buffer, 20 ml sachet, 25
pcs.
MA9004 pH 4.01 buffer, 230 ml bottle
MA9006 pH 6.86 buffer, 230 ml bottle
MA9007 pH 7.01 buffer, 230 ml bottle
MA9009 pH 9.18 buffer, 230 ml bottle
MA9010 pH 10.01 buffer, 230 ml bottle
MA9015 Electrode storage solution, 230 ml
MA9016 Electrode cleaning solution, 230 ml
MA9020 ORP test solution (200/275 mV), 230
ml bottle
M10000B Electrode rinse solution, 20 ml sachet,
25 pcs.
WARRANTY
This instrument is warranted against defects in materials
and manufacturing for a period of two years from t he d at e
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, pl ease return the parts to either
distributor or our office and the repair will be done free of
charge. Damages due to accidents, misuse, tampering or
lack of prescribed maintenance are not covered.
Milwaukee/Martini instruments reserves the right to make
improvements in design, construction and appearance of
its products without advance notice.
SPECIFICATIONS
RANGE -2.00 to 16.00 pH
±1000 mV (ORP)
-5.0 to 60.0°C / 23.0 to 140.0°F
RESOLUTION
0.01 pH / 1 mV
0.1°C / 0.1°F
ACCURACY (@25°C)
±0.05 pH / ±2 mV
±0.5°C / ±1°F
TYPICAL E M C DEVIATI O N
±0.02 pH
±2 mV
±0.3°C / ±0.6°F
TEMPERATURE COMPENSATION
Automat ic f or pH, from -5 to 60°C
CALIBRAT ION, pH Au tomatic, 1 or 2 poin ts
with 2 sets of memorized buffers(pH 4.01,
7.01, 10.01 or 4.01, 6.86, 9.18)
CALIBRATION, ORP Factory calibrated
PROBE Replaceable MI 58P
ENVIRONMENT -5 to 50° C; 100% RH max.
BATTERY TYPE 4 x 1.5V; IEC LR44, A76
BATTERY LIFE approx. 250 h ours of use
AUTO-OFF after 8 minut es of non-use
DIMENSIONS 200 x dia 38 mm
WEIGHT 100 g
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