Dynamic calibration can be only conducted during operation with a network and switched-on VAV system.

The DXR2 web server during commissioning is used to conduct dynamic calibration of a VAV box. The DXR2 web server must be connected. After logging on, a Favorites view is provided for calibration. The overview includes all relevant parameters and the data point for automatically conducting dynamic calibration. The following list displays an overview of the parameters on dynamic calibration for each VAV box.

Supply calibration

Description

Object

Default value

Supply air VAV balancing state
▶ Indicates the state of progress of the balancing process for this VAV box. It is written by the controller in response to the user-entered balance command. It persists through a power cycle.

1:Initial
2:Balancing
3:Balanced

VavSuBalSta

1:Initial

Supply air VAV balancing mode
▶ Air flow value set by the air balancer person to select the air flow setpoint value used when the balancing state = balancing.

1:Maximum cooling
2:Maximum heating
3:Maximum ventilation
4:Minimum cooling
5:Minimum heating
6:Minimum ventilation
7:Smoke

VavSuBalMod

1:Maximum cooling

Supply air VAV duct area
▶ Duct cross-sectional area, user-entered or calculated by controller using the duct shape, dimension A and dimension B values.

0…1 [m2], 0.0…10.76 [ft2]

VavSuDuctArea

0.05 [m2]
0.54 [ft2]

Supply air VAV flow coefficient
▶ The value used to calibrate span of air flow measurement. The value of calc flow coefficient is written to this object upon the Calibrate command.

VavSuFlCoef

0.780

Exhaust calibration

Description

Object

Type

Default value

Extract air VAV balancing state
▶ Indicates the state of progress of the balancing process for this VAV box. It is written by the controller in response to the user-entered balance command. It persists through a power cycle.

1:Initial
2:Balancing
3:Balanced

VavExBalSta

MCnfVal

1:Initial

Extract air VAV balancing mode
▶ Air flow value set by the air balancer person to select the airflow setpoint value used when the balancing state = balancing.

1:Maximum ventilation
2:Minimum ventilation
3:Smoke

VavExBalMod

MCnfVal

1:Maximum ventilation

Extract air VAV duct area
▶ Duct cross-sectional area, user-entered or calculated by controller using the duct shape, dimension A and dimension B values.

0...1 [m2], 0.0...10.76 [ft2]

VavExDuctArea

ACnfVal

0.050 [m2]
0.540 [ft2]

Extract air VAV flow coefficient
▶ The value used to calibrate span of airflow measurement. The value of calc flow coefficient is written to this object upon the Calibrate command.

0...2

VavExFlCoef

ACnfVal

0.780