BATTERY REPLACEMENT:
pH51 is supplied with BEPS (Battery Error Pre-venting
System) which avoids any erroneous reading due to low
battery level, by switching the meter off. To replace the
batteries unscrew the battery compartment cap and replace all
three 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.
WARRANTY:
This meter (base unit) is warranted from all defects in
materials and manufacturing for a period of two years.
The electrode (probe end) is warranted for a period of 6
months.
During this period, the required repair or replacement of parts,
where the damage is not due to negligence or erroneous
operation by the user, will be effected free of charge.
WARRANTY REGISTRATION:
Please go to our web site and register your unit at
http://www.milwaukeetesters.com/registration.html
Milwaukee Instruments
2950 Business Park Drive
Rocky Mount, NC 27804
Phone # 252-443-3630
_________________________________
US Only -- Toll Free
877-283-7837
PH51 WATERPROOF METER
OPERATORS MANUAL
#1: CONDITIONING OF THE PH51:
THIS MUST BE DONE PRIOR TO
CALIBRATION & USE OF THIS UNIT
Remove the cap from the end of the unit and immerse
the pH51 probe into a cup or jar with 1” to 1.5” inches
of Bottle Drinking water, or 4.01 calibration solution, or
MA9015 storage solution for a minimum of 2 to 4
hours to activate the PH51 electrode.
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#2: CALIBRATION OF THE PH51:
After doing the conditioning and activation above
unscrew the battery compartment cap on the top of the
meter and locate the 2 calibration screws at the bottom
of the well opposite the battery compartment. Perform
the following two-point calibration procedure.
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Calibration Procedure:
• With the cap off Immerse the Probe into pH7.01
(M10007) buffer solution provided.
• Allow the reading to stabilize and with the small
screwdriver provided inside the case, turn the ( “7” )
calibration screw located at the bottom, inside the
battery compartment, until the LED display shows
"7.0".
• Rinse the electrode with water and now put the probe
into pH4.01 (M10004) buffer solution provided.
• Allow the reading to stabilize and with the small
screwdriver turn the ( “4” ) calibration trimmer until
the LED display shows "4.0".
* * * YOU ARE NOW CALIBRATED * * *
#3: OPERATION OF THE PH51:
• Remove the unit from your storage container cup or jar
( Remember to always store the probe wet )
• Turn the pH51 on by pressing the ON key.
• Immerse the electrode in the solution to be tested.
• Stir gently and wait for the reading to stabilize.
• After use, turn unit off by pressing the OFF key and
rinse the end of the probe with water and then return it
to jar or cup for storage.
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#4: STORAGE OF THE PH51:
Leave the protective cap off and put the PH51 back in a
cup or jar that has 1” to 1.5” of either Bottle Drinking
water, or 4.01 calibration solution, or MA9015 storage
solution
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NEVER-> LET THE PROBE DRY OUT
Always store the probe in a cup or jar that is 1” to 1.5”
inches deep in Bottle Drinking water, or 4.01 calibration
solution, or MA9015 storage
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NEVER -> USE DISTILLED OR
DEIONIZED WATER FOR
STORAGE PURPOSES.