GENERAL OPERATION:
TAKING pH MEASUREMENTS:
•
The meter is supplied com-
plete with a 9V battery.
Remove the battery com-
partment cover on the
back of the meter and in-
stall the battery while pay-
ing attention to its polarity.
•
Always remove the electrode protective
cap before taking any measurement. If the
electrode has been left dry, soak the tip
(bottom 2.5 cm) in M10000 rinse solution
for a few minutes to reactivate it.
USER MANUAL
•
•
Select the pH range with the
“RANGE” key.
•
•
Connect the MA851D/1
probe to the meter.
PORTABLE
pH/EC/TDS/Temperature Meter
Immerse the tip (2.5 cm) of
the probe into the sample and
stir gently.
Read the pH value when the
clock symbol stops blinking.
Turn the instrument on by
pressing the ON/OFF key.
At start-up, the LCD
shows the percentage of
the remaining battery life
for a few seconds, and
then the current measure-
ment.
To select the temperature measurement unit
(°C or °F), press and hold the “ON/OFF” key
until “TEMP” and the current temperature unit
are displayed on the secondary LCD. Use the
“SET” button to select the unit and then press
the “ON/OFF” key a couple of times to return
to normal mode.
To activate the HOLD
function, keep pressed the
“HOLD” key. The mea-
sured value will be fro-
zen on the display and
the “HOLD” message ap-
pears on the secondary
LCD.
•
MODEL: SM806
Combined Meter
pH CALIBRATION PROCEDURE:
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 alkaline range (pH > 7).
Use two beakers for each buffer solution:
one beaker for rinsing the probe, the other for
calibration. In this way the cross contamina-
tion between solutions is minimized.
B) Procedure:
•
Enter the pH mode with the “RANGE” 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; then select
the desired buffer set with the “SET” key:
“7.01 pH BUFF” (for standard solutions: pH
4.01, 7.01, 10.01) or “6.86 pH BUFF” (for
NIST solutions: pH 4.01, 6.86, 9.18). Press
the “ON/OFF” key again to exit.
•
•
To set the measurement range (pH, µS, ppm),
press the “RANGE” key. The chosen mode
will be stored until next change.
Before taking any measurement, make sure
that the meter has been calibrated (the “CAL”
tag is displayed on the left lower corner of the
LCD).
After measurements, switch the meter off by
pressing the “ON/OFF” key. The “OFF” mes-
sage appears on the LCD; release the button.
Store the electrode with a few drops of stor-
age solution in the protective cap.
•
•
Remove the protective cap, then immerse
the probe in the first buffer solution.
•
•
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 NIST buffer set) will
be displayed.
•
•
For a single point pH calibration, place the
probe in any buffer from the selected set
(e.g. pH 4.01 or 7.01/6.86 or 10.01/9.18).
The meter will automatically recognize the
buffer value, store the calibration point and
return to normal mode.
Note: We reserve the right to modify design,
construction and appearance of our products with-
out advance notice.
If using pH 7.01 (or pH 6.86), after recog-
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