9
2.6 Connecting the Probe and Temperature Sensor
To connect the probe to the meter, align the BNC connector slots with
the posts of the meter socket and rotate the connector clockwise until
it locks. Do not force the connector. To remove the probe, rotate the
connector in a counter-clockwise direction until it unlocks, and slide the
connector o
ff
the socket.
Insert the mini phono jack of the temperature sensor into the socket on
the meter. Unplug the phono jack when not in use or when measuring pH
without temperature compensation.
2.7 Conditioning the pH Probe
For best results condition the pH probe before the
fi
rst use, or if it has
not been used for a long time, by soaking it in pH 4 bu
ff
er solution for at
least 1 hour. Rinse before use.
2.8 Switching the Meter On
1. Press the
ON/OFF
key. All LCD segments will display
momentarily as the meter performs a self-diagnostic test. The
meter will display “- - -“ if the meter has not been calibrated or if
the meter has been reset.
2. Press the
MODE
key to choose the desired measurement mode.
If a temperature probe is not connected, either 25.0°C (factory
2.5 mm mini phono
jack for
temperature sensor
BNC connector
for pH/ORP probe
or Ion Selective
Electrode
