Milwaukee pH52, pH53 Operational Guide, Calibration, Electrode Replacement, Battery Replacement

OPERATIONAL GUIDE:

•Remove the 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 key and select the measure range (pH, °C or °F) with the SET button.

•Immerse the electrode in the solution to be tested.

•Stir gently and wait for the reading to stabilize.

•To freeze the display, while in mea-

surement mode, press and hold the SET button until the H tag lights up.

The reading will be frozen on the LCD. Press the SET button again to return to normal mode.

•After use, 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.

•Always turn the meter OFF and replace the protective cap after use.

NEVER USE DISTILLED OR DEIONIZED WATER FOR STORAGE PURPOSES.

CALIBRATION:

•Enter the Calibration mode by pressing the CAL button. The pH tag will start blinking on the LCD.

•For a single-point calibration, place the electrode in any buffer, eg. pH 4.01, 7.01 or 10.01. The meter will automatically recognize and display the buffer value.

•When the pH tag stops blinking, press the SET button to confirm the calibration point.

Note: If the pH 7.01 buffer was used, press the SET button again to exit the Calibration mode; the first calibration point is stored and the meter returns to the measurements mode. Otherwise, if a different buffer was used, the meter will automatically return to normal mode.

•For a two-point calibration, place the electrode in pH 7.01 buffer. The meter will automatically recognize and display the buffer value.

•When the pH tag stops blinking, press the SET button to confirm and store the first calibration point.

•The meter will then ask for the second buffer. Place the electrode in pH 4.01 (or pH 10.01) buffer.

•When also this buffer is recognized, press the SET button to confirm and store the second calibration

point; the meter will return to normal mode.

Note: If a solution with wrong pH value is used as buffer for calibration, the LCD will display the “Ec” message.

Note: To exit the Calibration mode, press the CAL button at any time. The meter will display dashes and then return to normal measurement mode.

Note: To reset to the default values, after entering the Calibration mode and before the first calibration point is confirmed (pH tag is blinking), press and hold the SET key, and then the CAL button.

Note: For better accuracy it is recommended to carry out a 2-point calibration procedure.

ELECTRODE REPLACEMENT:

• Remove the protective cap and un- screw the plastic ring on the top of the electrode.

• Pull out the MA73047 pH electrode and replace it with a new one (align- ing the colored pin towards the LCD side).

• 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.

When the low battery indicator appears

only a few hours of battery life is re- maining. It is recommended to replace

the battery immediately.

The meter is also provided with BEPS

(Battery Error Preventing System) which avoids any erroneous reading due to

low battery level, by warning the user with the “Eb” message on the LCD.

To replace the batteries unscrew the battery compart- ment 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.