P
AGE
9
OF
25
6.
Typical Operational sequences, Fill.
Operation: Fill
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 fill command or
[A] key on the PLC is held down
for > 2 seconds.
1-2 seconds
No action taken for 1 second.
Purge stream valves with air
4 times 4 seconds
(
6 times 4 seconds for 6 stream
option)
Open each stream inlet valve (if
fitted) for 4 seconds.
Close the valve to the venturi.
Open the purge air valve.
Purge the stream valve with
instrument air.
Purge sample chamber and line
with air.
20 seconds
Open the selected stream inlet
valve.
Close the valve to the venturi.
Open the purge air valve.
Purge the sample line with
instrument air.
Fill External Chamber*
0 seconds
Open the selected stream inlet
valve.
Open the venturi air valve.
Allow the External chamber to fill.
Settling Time*
0 seconds
No action
*Note: If a particulate separation chamber
“External Chamber” option is being used at the sampling point
externally, Fill External Chamber & Settling Time timers will need to be adjusted according to the site
specific requirements.
Fill the sampler
100 seconds
Open the selected stream inlet
valve.
Open the venturi air valve.
Allow the sampler to fill.
Sampler full
N/A
Close the selected stream inlet
valve.
Deactivate the venturi pump.
There is also a timer which times
out even if the sampler is not full.
After the timer has timed out:
Open the valve to the BioTector.
If the sampler is not full when the
timer times out, an error is
generated.
Note: The sampler remains in the Sampler Full condition, until reset by an empty command from the
BioTector, or the [B] key on the PLC is held down for >2 seconds.
