Figure 1 Left side view
1 Handle 4 USB connection
2 Instrument ON/OFF switch 5 External power supply connection
3 RS232 connection 6 Card identification system (option not yet available)
Figure 2 Right side view
1 Sample flow adjustment valve 2 Sample flow valve with inlet and outlet connections
(the sample inlet is at the top of the valve and the
outlet at the bottom).
Sample flow valve
The sample flow valve has three positions:
• Sample line PURGE
• Sample flow ON
• Sample flow OFF
The PURGE position is used to clear the sample line of any build up of air bubbles. For a thorough
purge, it is recommended to keep the valve in this position for 5 seconds. During this operation, the
sample flows directly from the inlet tubing to the outlet tubing. All measurements are suspended
during this time as the sample does not come into contact with the sensor.
The ON and OFF positions turn the sample flow on and off respectively.
Instrument connections
External power
W A R N I N G
When using an external power supply to power the instrument, ensure the external power socket is earthed.
In addition to the internal rechargeable battery pack, the instrument can be powered by an external
power source using the supplied adapter and cable. Connect the adapter to the power supply
8
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