Dynamic differential pressure transducers

Universalregler VRD3

Dynamic differential pressure transducers

For the dynamic measurement of effective and differential pressures

Differential pressure transducers based on the dynamic measurement principle for volume flow rate measuring units Type VMR or VME

Linear volume flow rate actual value 0 – 10 V DC or 2 – 10 V DC
Recording of measured values for the display of volume flow rates or for the control of slave controllers
Any installation orientation
Parameters are factory set

Application

Application

Electronic volume flow controller Universal with dynamic differential pressure transducer for use with volume flow rate measuring units
Parameters are factory set
On-site adjusting is not required

Standard filtration in comfort air conditioning systems allows for use of the transmitter in the supply air without additional dust protection. Since a partial volume flow is passed through the differential pressure transducer in order to measure the volume flow rate, please note:

With heavy dust levels in the room, suitable extract air filters must be provided.
If the air is polluted with fluff or sticky particles, or if it contains aggressive media, dynamic pressure transducers cannot be used

For this application the Universal controller is only used for measuring the differential pressure and for transforming the measured value into a linear voltage signal. Connections for setpoint value signal and actuator are not relevant, and neither are the corresponding technical data.

Volume flow rate actual value is available as linear voltage signal

Description

Parts and characteristics

Sensor for dynamic differential pressure measurements

Technical information

Function, Technical data, Produktbeziehungen

Principle of operation – dynamic differential pressure transducer 00133062_0

① Differential pressure transducer
② Volume flow controller
③ Actual value signal

Functional description

The volume flow rate is determined by measuring the effective pressure. For this reason the measuring unit is fitted with an effective pressure sensor.

The integral differental pressure transducer transforms the effective pressure into a voltage signal. The volume flow rate actual value is hence available as a voltage signal. The factory setting is such that 10 V DC always corresponds to the nominal volume flow rate (V_nom).

Voltage ranges are factory stored in the controller. Changes on the customer's site can easily be carried out using an adjustment device or a notebook with service tool.

Volume flow controller VRD3

Supply voltage (AC)	24 V AC ± 20 %, 50/60 Hz
Supply voltage (DC)	24 V DC −10/+20 %
Power rating (AC)	without actuator max. 3.5 VA
Power rating (DC)	without actuator max. 2 W
Setpoint value signal input	0 – 10 V DC, R_a > 100 kΩ
Actual value signal output	0 – 10 V DC, 0.5 mA max.
IEC protection class	III (protective extra-low voltage)
Protection level	IP 40
EC conformity	EMC according to 2014/30/EU
Weight	0.440 kg

Variants

Universal controller VRD3 00131918_0

Any attachments are to be defined with the order code of the volume flow rate measuring unit.

B10

Application

Electronic volume flow controller VRD3 with dynamic differential pressure transducer for use with volume flow rate measuring units
Differential pressure transducer and controller electronics are fitted together in one casing

Signal voltage range

0: 0 – 10 V DC
2: 2 – 10 V DC

Parts and characteristics

Sensor for dynamic differential pressure measurements

Dynamic differential pressure transducers for volume flow rate measuring units

Order code detail	Attachment	Controller	Volume flow rate measuring unit
Order code detail	Part number	Type
B10	M546GA4	VRD3	VMR, VME

Electrical connection, Characteristics

B1*, Klemmenbelegung 00135380_0

① Steckverbindung Stellantrieb
② Steckverbindung Einstellgerät
1 ⊥, –: Masse, Null
2 ~, +: Versorgungsspannung
3 w: Sollwertsignal
4 PP: Anschluss Einstellgerät
5 U5: Istwertsignal
6 z1: Zwangssteuerung 1 (AUF)
7 z2: Zwangssteuerung 2 (ZU, V_min, V_max)

Universal: VRD3

BC0, BP*, B1*, Kennlinie des Istwertsignals

① 0 – 10 V DC
② 2 – 10 V DC

LMV-D3-MP, NMV-D3-MP, NMV-D3LON, VRD3, VRP-M

Downloads

product information

Product data sheet Type Dynamic differential pressure transducers

Product data sheet 1,4 MB pdf

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