8 of 21 INST.21
Before use, remove the plastic protective cap of pH electrode
and condition the glass bulb by soaking it in tap water for 1 -
2 hours. This hydrates the glass bulb if electrode is too dry or
has not been used for a long period of time.
Always rinse the probes with tap water or rinse solution
before and after each calibration/sample measurement to
avoid cross-contamination. For details please refer to
section on Probe Care and Maintenance.
1
Take a sample tube containing the pH 7 solution. Power
on the meter, and the meter will automatically enter pH
measurement mode.
2
Dip both electrode and temperature sensor into the buffer
solution. Swirl gently and wait for reading to stabilise
(approx 30 seconds).
3
Press
CAL
key to enter calibration mode. A ‘CA’ displays
momentarily and the display shows the current uncalibrated
reading flashing while in the calibration mode :
Allow reading to stabilise. The meter automatically
recognises pH 4.01, 7.00 or 10.01 buffers. Press
ENTER
key once to confirm calibration, the LCD displays ‘CO’
momentarily once calibration is confirmed. The meter exits
calibration mode and returns to measurement mode :
Alternatively you can press
CAL
key to abort or exit
calibration mode, without accepting new value while you
are in calibration mode.
ca
7.00
pH
co
7.00
pH
