10
PROCEDURE
• Disconnect the +ve supply cable from “+VE LOOP“ terminal
and connect a 20 mA f.s. ammeter between the +ve cable and
“+VE LOOP“ terminal.
• Remove the protective cap from the electrode,
rinse it with some pH 7.01 solution or immerse it
in the pH 7 rinse solution, then immerse the pH
electrode and temperature probe into pH7.01
calibration buffer solution; shake briefly and wait
for the reading to stabilize.
Note:
The tip of the electrode should be
submerged approximately 4 cm (1½")
into the solution. The temperature probe
should be located as close to the pH
electrode as possible.
• Adjust the offset trimmer until the ammeter reads 12 mA or the
display shows “7.01“ if the temperature of the buffer is at 25 °C.
For other buffer temperatures, refer
to page 12 for the appropriate
mA / pH reading.
• Rinse the electrode with tap water or distilled
water and a small amount of pH 4.01 or 10.01
buffer solution or immerse it in the pH 4 rinse
solution (2nd calibration point). Dip the electrode
and the temperature probe into pH 4.01 (or
10.01) calibration buffer solution, shake briefly
and wait for a few minutes for reading to
stabilize.