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OPERATION
The meter is supplied complete with a 9V battery. Slide
off the battery compartment cover on the back of the
meter. Install the battery into the battery clip connector
while observing 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 rinse solution
(M10000B) for a few minutes to reactivate it.
Connect the pH electrode to the BNC
socket on the top of the meter.
Turn the instrument on by pressing
the ON/OFF key.
Make sure that the meter has
been calibrated before taking any
measurements (see Calibration
Procedure).
Set the temperature knob to the value
of testing solution (measured with
help of an accurate thermometer).
Immerse the tip (2.5 cm) of the pH
electrode into the sample and stir
gently.
After completing measurements,
switch the meter off and store
the electrode with a few drops of
storage solution (MA9015) in the
protective cap.
CALIBRATION PROCEDURE
A) Preparation:
Two calibration buffers are required
1. pH 7.01 (MA9007)
2. pH 4.01 (MA9004) if you are measuring in acid range
(pH 0 - pH 7) or pH 10.01 (MA9010) if you are measuring
in alkaline range (pH 7 - pH 14). Use two beakers for each
pH buffer. One beaker for rinsing the electrode, the other
for calibration. Use a thermometer with 1ºC accuracy to
measure the temperature of calibration solution.
B) Procedure:
Remove the protective cap from
the electrode. Rinse the tip of the
electrode with some pH 7.01 solution,
then immerse the pH electrode into
a pH 7.01 buffer solution.
Take the temperature of the buffer
solution with a thermometer and
set the temperature knob to the
measured temperature (e.g. 15ºC).
Adjust the OFFSET trimmer (pH 7)
on the front panel, with a small
screwdriver until the LCD shows
the pH value at temperature of
the buffer (see the pH versus
temperature chart).
E.g. in this case, if the temperature
is 15ºC, the meter display should be
adjusted to read "pH 7.04".
Now rinse the pH electrode in the
first pH 4.01 beaker, then immerse
it into the second pH 4.01 beaker or
follow the same procedure if using
pH 10.01 buffer.
Adjust the SLOPE trimmer (pH 4/10)
on the front panel, with a small
screwdriver, until the LCD shows
the pH value of the buffer at the
temperature of measurement (see
the pH versus temperature chart).
E.g. in this case, if the temperature
is 15ºC, the meter display should be
adjusted to read "pH 4.00" (or pH 10.01
would be adjusted to 10.12 pH).
Calibration is now complete.
pH VERSUS TEMPERATURE CHART:
TEMP
pH VALUES
°C
°F
MA9004
MA9007
0
32
4.01
7.13
5
41
4.00
7.10
10
50
4.00
7.07
15
59
4.00
7.04
20
68
4.00
7.03
25
77
4.01
7.01
30
86
4.02
7.00
35
95
4.03
6.99
40
104
4.04
6.98
45
113
4.05
6.98
50
122
4.06
6.98
55
131
4.07
6.98
60
140
4.09
6.98
65
149
4.11
6.99
70
158
4.12
6.99
BATTERY REPLACEMENT
When the battery becomes weak the meter will
display "
".
When the low battery indicator appears, only a few
hours of battery life remain. A low battery will result in
unreliable measurements. Prompt battery replacement
is required.
Battery replacement must only take place in a non-
hazardous area using an alkaline 9V battery.
Turn the meter off, slide the battery compartment cover
located at the rear of the meter off and replace the 9V
battery with a new one. Make sure the battery contacts
are fully engaged in the connector, seat the battery in its
compartment and replace the cover.
MA9010
10.32
10.24
10.18
10.12
10.06
10.01
9.96
9.92
9.85
9.85
9.82
9.79
9.77
9.76
9.75
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