Accutrol AccuValve AVT3000, Руководство по установке и эксплуатации

Страница: 23 / 34

Installation & Operation Manual
- Model AVT3000 & H-AVT3000
Contents of this Manual are Subject to Change Without Notification
Page 23
TOOLS
Adjustment
➢
Balancer Offset : Provides a simple tool for correlating the transmitter airflow
measurement to a field measurement in one step.
This offset is applied as an Equal % Cal. Adj. which does not overwrite the
factory calibration of the AVT3000. Using this function is not normally
required with the AccuValve (or advisable) and is only provided as a tool for
the Airflow Balancer to correlate the AVT3000 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
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 AVT3000 Transmitter.
Factory Cal. Airflow Meas. Curve
Airflow Meas. Curve with -10% Cal. Adj.