Press to record readings into memory. See section 9.1.
Also used to select primary and secondary buffers for automatic
buffer recognition. See section 14.
Press to show or hide the date and time. See section 13.2.
Press to start or stop automatic logging. See section 10.
Alternatively, press to transmit current reading plus date and time to
the RS232 port (optional) See section 11.2.
Press to zero relative mV, when relative mV mode is selected. See
section 6.
Press to access the user-friendly menu system which makes the
WP-80 a breeze to operate.
and
The and keys are used when calibrating temperature readout
(section 7), setting manual temperature compensation (section 7.4),
setting the clock (section 13.1), setting the automatic logging period
(section 10), and displaying GLP information (section 8.1).
The key is also used to initialise the WP-80 at turn-on. See
section 15.
Switches the WP-80 on and off.
Display
32 character alpha-numeric display with user-friendly menu and
prompting system. Shows pH/mV and temperature simultaneously.
Date and time can also be displayed.