3-O&M_Settings_r1r Section 3Page 9
EBTRON, Inc • 1663 Hwy 701 S., Loris, SC 29569 • Toll Free: 800-2EBTRON (232-8766) • Fax: 843-756-1828 • EBTRON.com
3.3.7.3. -F PROBE TYPES
Default: {Null}
Optional Settings: 0.00 to 9999.99 (sq. ft) [0.000 to 999.999 (sq. m)]
3.3.7.3.1. -F/SI and -F/DI probe types
The area can be entered manually or by using the FAN WIZARD.
DWDI fans indicate a single AREA parameter equal to the total area of both inlets.
3.3.7.3.2. -F/An probe types
The area can be entered manually or by using the FAN WIZARD.
Transmitters provided can be configured for up to eight individual fans in a fan array. Transmitters
indicate a single AREA parameter equal to the total area of all of the fans in the array. Parameters
for F_AREA1, F_AREA2 … F_AREAn are visible after the ARRAY WIZARD is run. Individual fan
areas are used to determine individual fan airflow rates and to enable fan alarming features. Once
the ARRAY WIZARD has been run the AREA parameter is locked and can only be modified by
changing individual fan areas (i.e. the AREA is calculated based on individual fan areas).
3.3.7.4. -B PROBE TYPES
Default: {Null}
Optional Settings: 0.00 to 9999.99 (sq. ft) [0.000 to 999.999 (sq. m)]
The area where the bleed sensor is located is generally not a concern. However, there are applications
where the bleed sensor is used to determine the airflow rate through an opening, such as a hallway or
corridor. It can also be used to estimate the airflow across a louver. In all cases, a reference airflow is
required. The area can be entered manually or by using the AREA WIZARD.
Use the area of the opening to “rough out” the CFM [L/s] and a reference airflow to adjust offset/gain
values to “fine tune” the measurement.
3.3.8. Differential Pressure Conversion [DPCONVERT]
Differential pressure conversion applies to the -B probe type only. The air velocity is converted to the
equivalent pressure based on a nominal flow coefficient for the bleed sensor housing without any pipe or tube
connected, is calculated using the measured air velocity.
[Menu path: SETTINGS >↓ GENERAL >↓ DPCONVERT]
Default: NO
Optional Settings: YES
DPCONVERT=NO. The measured air velocity is not converted to an estimated differential pressure.
DPCONVERT=YES. An estimated differential pressure, based on a nominal flow coefficient for the bleed
sensor housing.
The bleed airflow sensor is not a pressure sensor. The converted pressure is simply an estimate and
should not be used for critical pressure measurement without field adjustment to a known pressure
reference.
The addition of pipe or tubing to the bleed sensor housing will increase pressure losses and add
additional error to the pressure measurement.
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