Installation & Operation Manual - Model AVC5000
Contents of this Manual are Subject to Change Without Notification
Page 49
Airflow Volume Measurement Adjust
can be used to correlate the airflow volume measured by
the AVC5000 to a field measurement.
NOTE:
The
Equal % Cal. Adj.
is a single-step field calibration method which does not
overwrite the factory calibration of the AVC5000. Using this function is not normally
required (or advisable) and is only provided as a tool for the Airflow Balancer to correlate
the AVC airflow measurement to a field airflow measurement. The graph below shows
the effect the Equal % Cal Adj. has over the entire operating range
.
-10% Adj.=
-100 CFM change
-10% Adj. =
-40 CFM change
1000
400
800
600
200
0
Face Velocity Measurement Adjust,
which is only available in Fume Hood Mode, is explained in
Section 6.6.4.2.6.1.
Actuator Feedback Calibration
provides a means to calibrate the actuator feedback signal
precisely with the “valve % open” parameter.
Caution:
The Equal % Cal. Adj.
should only be performed if the
field measurement is taken in
accordance with ANSI/ASHRAE
STD 111 with the minimum
requirements satisfied, otherwise
the calibration adjustment will
reduce the accuracy of the AVC.
Factory Cal. Airflow Meas. Curve
Airflow Meas. Curve with -10% Cal. Adj.
Step 1
: Press
Adaption Button
Step 2
: Select
OK
after the Actuator
Adaption is Complete
Step 3
: Select
Calibrate 100%
to
Drive Valve to the Full Open
Position
Step 4:
Select
Increase %
or
Decrease %
to Adjust Live Reading to
100%
Step 5:
Select
Calibrate 0%
to Drive
Valve to the Closed Position
Step 6:
Select
Increase %
or
Decrease %
to Adjust Live Reading
to 0%
