Milwaukee PH55 User manual

USER MANUAL
pH 55 • pH 56
Pocket-size
pH/°C/°F Meters
www.milwaukeeinst.com
Automatic Temperature Measuring unit
Compansation Indicator on main LCD
Instability Indicator Main LCD
Calibration Indicator Temperature
Low Battery Indicator reading
Secondary LCD
OPERATIONAL GUIDE
• Remove the electrode cap and immerse
the meter in MA9015 storage solution for
2 hours to activate the electrode.
• Turn the meter on by pressing the
ON/OFF button. All the used segments
on the LCD will be visible for 1 second or
as long as the button is pressed.
• Immerse the electrode in the solution to
be tested. Stir gently and wait for the
reading to stabilize, i.e. the instability
indicator (hourglass) on the LCD turns
off.
• The pH value is automatically
compensated for temperature and will be
displayed on the main LCD, while the
temperature is shown on the secondary
LCD.
• To freeze the display, while in
measurement mode, press and hold the
SET/HOLD button. The “HOLD” message
appears on the secondary display and
the reading will be frozen on the LCD.
Press any button to return to normal mode.
• To turn the meter off, press the ON/OFF
button. The “OFF” message will appear
on the secondary display. Release the
button.
Note:
• Before taking any measurement, make
sure the meter is calibrated (the CAL tag
is on).
• After use always turn the meter OFF,
rinse the electrode with water to minimize
contamination and store it with a few
drops of storage (MA9015) or pH7
(M10007) solution in the protective cap.
NEVER USE DISTILLED OR DEIONIZED
WATER FOR STORAGE PURPOSE.
CALIBRATION PROCEDURE
For better accuracy, frequent calibration of
the tester is recommended. Calibration is
also necessary after electrode
replacement, after testing aggressive
chemicals and where extreme accuracy
is required.
• From normal operation mode, press and
hold the ON/OFF/CAL button until the
“OFF” message
on the secondary LCD is substituted by
“CAL”. Release the button.
• The instrument enters the calibration
mode by displaying “pH 7.01 USE” (or
“pH 6.86 USE” if the NIST buffer set was
selected).
• For a single-point calibration, immerse 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 buffer is detected,
the meter keeps the USE indication
active for 12 seconds, and then replaces
it with WRNG, indicating that the sample
being measured is not a valid buffer.
Otherwise, 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 pH 6.86) was used,
press the SET button to exit the
Calibration mode 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,
the meter will then ask for the second
buffer and the message „pH 4.01 USE”
will appear.
• Rinse the electrode and immerse it in
the second solution (pH 4.01, 10.01 or
9.18).
• If a valid buffer value is detected, the
REC message is displayed and the
meter completes the calibration
procedure. The LCD shows the
accepted value with the „OK 2”
message and the instrument returns to
the normal measurement mode.
Otherwise, if no valid buffer is detected,
the meter displays the WRNG
message.

Note: When the calibration procedure is
completed, the CAL tag is turned on.
• To quit the procedure and return to the
last calibration data, after entering the
calibration mode press the ON/OFF button.
The secondary LCD displays “ESC” for 1
second and then the meter returns to the
normal measurement mode.
• To reset to the default values and clear a
previous calibration, press the SET/HOLD
button after entering the calibration mode
and before the first point is accepted. The
secondary LCD displays “CLR” for 1
second, the meter resets to the default
calibration and the CAL tag on the LCD
turns off.
SETUP
Setup mode allows the selection of
temperature (°C or °F) and pH buffer set for
calibration.
To enter the Setup mode, press the
ON/OFF button until “CAL” on the
secondary LCD is replaced by “TEMP” and
the 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
return to the normal measurement 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 return to the normal
measurement mode.
ELECTRODE REPLACEMENT
• Remove the protective cap and unscrew
the plastic ring on the top of the electrode.
• Pull out the MI56P electrode and replace
it with a new one.
• Make sure the gaskets are in place before
screwing back the ring.
BATTERY REPLACEMENT
When the batteries become weak, the
battery symbol on the LCD will light up to
advise that only a few hours of working time
is remaining. The meter is also provided
with BEPS (Battery Error Prevention
System), which avoids any erroneous
readings due to low battery level by
automatically switching the meter off.
It is recommended to replace the batteries
immediately.
To replace the batteries unscrew the
battery 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 in this instruction manual.
ACCESSORIES
MI 56P Replaceable electrode for pH 55 & pH
56
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
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 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 done free of
charge.
Damages due to accidents, misuse,
tampering or lack of prescribed
maintenance are not covered. Milwaukee
instruments reserves the right to make
improvements in design, construction and
appearance of its products without advance
notice.
SPECIFICATIONS
RANGE -2.0 to 16.0 pH (pH 55)
-2.00 to 16.00 pH (pH 56)
-5.0 to 60.0°C / 23.0 to 140.0°F
RESOLUTION 0.1 pH (pH 55)
0.01 pH (pH 56)
0.1°C / 0.1°F
ACCURACY (@25°C) ±0.1 pH (pH 55)
±0.05 pH (pH 56)
±0.5°C / ±1°F
TYPICAL EMC DEVIATION
±0.1 pH (pH 55)
±0.02 pH (pH 56)
±0.3°C / ±0.6°F
TEMPERATURE COMPENSATION
Automatic, from -5 to 60°C
CALIBRATION Automatic, 1 or 2 points
with 2 sets of memorized buffers (pH 4.01,
7.01, 10.01 or 4.01, 6.86, 9.18)
PROBE Replaceable MI 56P
ENVIRONMENT -5 to 50°C; 100% RH
max.
BATTERY TYPE 4 x 1.5V; IEC LR44, A76
BATTERY LIFE approx. 300 hours of use
AUTO-OFF after 8 minutes of non-use
DIMENSIONS 200 x dia 38 mm
WEIGHT 100 g