P
AGE
11
OF
25
8.
Typical Operational sequences, Purge.
Operation: Purge
Default duration (note
that all times are
approximate, and will
vary with the specific
application)
Sampler action
Note: If the air used for pressurizing the sampler is below its set point at any time, the samplers fault
output is activated.
BioTector gives sample pump
reverse run command.
N//A
Open the valve to the BioTector.
The BioTectors sample pump runs in
reverse. The sample and reverse
cleaning acid are pumped back into
the sampler.
BioTector gives empty command,
or [B] key on the PLC is held down
for > 2 seconds.
5 seconds
Close the valve to the BioTector.
Purge sample chamber and line
with air.
10 seconds
Open the inlet valve.
Close the valve to the Venturi.
Open the purge air valve.
Purge the sample line with instrument
air.
Purge sample chamber and line
with air and water.
5 seconds
Open the inlet valve.
Close the valve to the Venturi.
Open the purge air valve.
Open the water valve.
Purge the sample line with instrument
air and water.
Purge the sample chamber and
line with water.
40 seconds
Open the inlet valve.
Close the valve to the Venturi.
Open the water valve.
Purge the sample line with water.
Purge the Venturi, sample chamber
and line with air and water.
5 seconds
Open the inlet valve.
Open the purge air valve.
Open the water valve
, but only if the
counter has reached its set-point.
Open the Venturi air valve.
Purge the Venturi, sample chamber
and line with air and water.
Purge the Venturi, sample chamber
and line with air.
10 seconds
Open the inlet valve.
Open the purge air valve.
Purge the Venturi, sample chamber
and line with air.
Purge sample chamber and line
with air.
90 seconds
Open the inlet valve.
Close the valve to the Venturi.
Open the purge air valve.
Purge the sample line with instrument
air.
Standby.
N/A
Close the inlet valve. Open the drain
valve.
