8
109118-1 Rev. A, 10/96
2
2.2
Measuring Samples
NOTE
Good laboratory practice dictates that electrodes should
be calibrated at least daily.
Place the tip of the electrode in the sample and press
to
start the measurement. The decimal point will be
flashing whenever the electrode is reading.
If you are using the '
auto read
' function the display freezes
when a stable endpoint is reached (see Section 2.3). To manually
freeze the display when the reading is stable, press
2.3
Automatic Endpoint (Auto Read)
The '
auto read
' function checks the electrode output for stability
and automatically freezes the display when the reading appears
stable. It can be used during calibration and routine
measurements.
Turn auto endpoint on by pressing
The auto endpoint indicator
will appear at the top right of
the meter display. While the meter is reading, both the 'A' and
the decimal will flash. When the endpoint is reached, both will
stop flashing.
To start another reading press
To cancel auto endpoint press
again.
2.4
Changing the Calibration Buffer Settings
The default settings in the meter are for 4.00, 7.00 and 10.01
buffers. The Model 440 will allow you to change these settings to
any buffer values that you wish to work with.
auto
read
read
read
auto
read
read
