Exh Pres Flow - Pressura RPM10 Operation And Service Manual

Input7 Config Menu

Exh Pres Flow

SOFTWARE
MENU ITEM
NAME
Set Flow Station Duct Area
Duct Area
RPM 10 and
RPM20
Set Flow K-Factor K-Factor
Adjustment
RPM 10 and
RPM20
ITEM DESCRIPTION
The Duct Area item is used to program the cross sectional
area of the duct where the flow station is mounted. Since
the flow station is used to measure duct velocity, the Duct
Area is necessary to calculate the duct air flow.
NOTE: The DIM does not compute duct area. The area
must be first calculated and then entered into the unit.
Use the following equations to calculate the duct area
2
(in ft ).
For round ducts
For rectangular ducts
W A R N IN G
If the proper Duct Area is not programmed into the Model
RPM10 and RPM20, the flow measurement will be
incorrect. Thus, all the other information that uses the flow
measurement, such as the flow alarms, will also be
incorrect.
The K-Factor menu item sets the "K" factor for the flow
signal. The flow signal is multiplied by the K-Factor so that
the flow measurement matches the actual flow, determined
with a pitot tube traverse or other reference measurement.
NOTE: K-Factor modifies the entire range of the calibrated
flow, not just a single point.
DEFAULT
ITEM RANGE
VALUE
2
0 to50.00 ft 0.00 ft
2
(0 to 4.6450 m ) (0.0000 m
0.01 to 10.00 1.00
2
2
)