Ecotech HiVol 3000

Operation HiVol 3000 User manual 1.7
42
Notes:
Flow: Flow-rate should be set at 67.8m
3
/hour (based on 40ft
3
/min U.S.
EPA standard) when using size selective inlets. The size selective inlet
particle cut-point will be most accurate when the flow-rate is set 67.8m
3
/h.
Do not set the flow rate below 45 or above 96 m
3
/hour.
Ref. Temp. and Ref BP: Ensure these are set to Standard Temperature
and Pressure Conditions (varies between different countries.)
Size Select function: This function determines what happens when the
filter blocks up and the flow rate can no longer be maintained at the set
value. Setting this parameter to “YES” activates low flow-rate limits. If the
flow rate drops below the set flow rate for more than about 45 seconds,
the FILTER BLOCKED screen is displayed and the motor stops. This
feature means that the sample need not be discarded if a blocked filter
causes the flow-rate to drop below the required value for the Size
Selective Inlet. The RunTime, Total Volume and Corrected Volume will
stop accumulating at this point.
Note: For U.S. EPA regulatory PM
10
monitoring,
sampling is generally required for 24h ± 1h
If this feature is not required, it can be de-activated by setting Size Select
parameter to NO. For example, TSP sampling can usually tolerate some
decrease in the flow-rate without invalidating the sample.
If this parameter is set to NO, the Filter Blocked screen will not appear until
the flow-rate drops to half of the set flow rate.
Filter Blocked: Filter blocked screen
Replace Filter
Before Restart: Press Exit or PageUp to resume normal
operation after replacing the filter.