Hanna Instruments HI 9017 - Manual (Page 13)

13
pH °C
4 cm (1½
")
TAKING PH MEASUREMENTS
Make sure that the instrument has been calibrated for pH before
taking pH measurements (see page 18).
Connect the pH electrode (combination-type) or the electrode half cells
to the appropriate connectors on the rear panel (see page 11).
If automatic temperature compensation is required, connect the
HI7669/2W temperature probe to the proper socket on the rear panel
(see page 11).
Press the ON key to turn the meter on. The meter will
automatically default to the pH measurement mode.
Immerse the electrode and the temperature probe
in the sample and shake briefly. Wait for 30
seconds before taking readings.
IN HI 9218 AND HI 9219
Press READY: "YES" confirms the read-
ing is stable.
The LCD on the right shows the pH reading compensated for tempera-
ture. The temperature reading is displayed on the LCD on the left.
Note: the electrode should be submerged approxi-
mately 4cm (1½") into the solution.
If the temperature probe is used, it should be
located as close to the pH electrode as possible.
If measurements are taken in different samples successively, it is
recommended that the electrode is rinsed thoroughly for better condi-
tioning and to eliminate cross-contamination of the sample.
ON
ON
READY
OPERATIONAL GUIDE OPERATIONAL GUIDE OPERATIONAL GUIDE OPERATIONAL GUIDE OPERATIONAL GUIDE