41
pH
m
EASU
rE
m
ENT
• If the pH reading is less than -2.00 pH or greater than 16.00 pH, the closest full-scale value will
be displayed blinking.
During pH measurements with stirrer on, the stirrer icon will be displayed. In case of a stirrer
malfunction, the stirrer will stop and the stirrer icon will start blinking.
If measurements are taken successively in different samples, it is recommended to rinse the electrodes
thoroughly with deionized or distilled water and then with some of the next sample to prevent
cross-contamination.
The pH measurement is affected by temperature. In order to have accurate pH measurements, the
temperature effect must be compensated for. To use the Automatic Temperature Compensation (ATC)
feature, connect and submerge the
HI7662-T
temperature probe into the sample as close as possible
to the electrode and wait for a few seconds. The “ATC” message will be shown on the display.
Automatic Temperature Compensation will provide pH corrected values for the measured temperature.
If Manual Temperature Compensation (MTC) is desired, the temperature probe must be disconnected
from the instrument.
The default temperature of 25 °C (77 °F) or the last temperature reading will be displayed, preceded
by the symbol and the “MTC” message.
The temperature can be adjusted with the
ARROW
keys (from -20.0 to 120.0 °C).
16.1. VIEW / DELETE RECORDED pH DATA
To view or delete previously logged pH records, press
MENU
then
Recall
to access the pH logs.
When an external USB storage device is connected, the Export key is displayed. It saves the meter and
titrator logs in two text format files on the storage device.
Press
Meter
or
Titrator
to view the respective logs.
The instrument will display a list of all the records stored in the log.