Location of sample lines – White Rodgers 770-1 User Manual
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LOCATION OF SAMPLE LINES
FAN OPERATION OR TRUE AIRFLOW
WITH LITTLE OR NO STATIC PRESSURE.
PROBE MUST BE PERPENDICULAR TO FLOW.
FAN OPERATION OR AIR FLOW
WITH NO STATIC PRESSURE.
FAN OPERATION AND TRUE AIR FLOW WITH
VARYING AMOUNTS OF STATIC PRESSURE.
PROBE MUST BE PERPENDICULAR TO FLOW.
SUCTION OR FAN OPERATION.
NEGATIVE PRESSURE
INCREASES
AS FILTER GETS DIRTY.
PROVE POSITIVE STATIC PRESSURE.
3 WAYS TO PROVE FILTER ON POSITIVE PRESSURE.
POSITIVE STATIC PRESSURE
INCREASES AS THE FILTER
GETS DIRTY.
DIFF. ACROSS
FILTER CHANGES
AS IT GETS DIRTY.
FLOW IS REDUCED
AS FILTER
GETS DIRTY.
PRESSURE CONVERSION TABLE
1" Water = .0361 Ibs/sq. in. or .0735 in. Mercury
1" Mercury = 13.6 in water or .491 Ibs/sq. in.
1 PSI = 27.7 in. water or 2.036 in. Mercury