XTD_img_01psd.png
Effective pressure transducer GT-VM-DD3
VME-XTD-XTSpng.png.link

Type VME with control component XTD

VMR_img_09psd.png
VMR-125-XTD

Type VMR with control component XTD

Type VMR with control component XTD

XTD_img_01psd.png
VME-XTD-XTSpng.png.link
VMR_img_09psd.png

XTD

EFFECTIVE PRESSURE TRANSDUCER FOR CLEAN AIR

Effective pressure transducers based on the dynamic measurement principle for volume flow rate measuring unit types VMR and VME 

  • Use in ventilation and air conditioning systems with clean air
  • Analogue actual value signal for monitoring and evaluation by the central BMS
  • Recording of measured values for the display of volume flow rates or for the control of slave controllers
  • Suitable for constant and variable volume flow rates
  • No commissioning using factory-set parameterisation 
  • Integral display for volume flow rate indication (l/s or m³/h)

General information

Application

  • Determination of volume flow rates for transmission and processing as an electrical signal for monitoring or tracking control
  • Measurement of effective pressure and conversion of the volume flow rate actual value into an analogue voltage signal
  • For use only with clean air
  • Standard filtration in comfort air conditioning systems allows for use of the controller in the supply air without additional dust protection
  • In the event of a strong occurrence of dust, install appropriate exhaust air filters upstream, as a partial volume flow is routed through the transducer for volume flow rate measurement.
  • If the air is additionally contaminated, e.g. with fluff or sticky components: Use the XTS control component instead of the XTD transducer described here
  • Transducer factory-set to the unit-related constant (K value) of the measuring unit


Interface

  • Analogue interface with adjustable signal voltage range



Signal voltage ranges

  • 0 – 10 V DC

  • 2 – 10 V DC



Parts and characteristics

  • Differential pressure transducer with dynamic transducer
  • Connecting cable with 3 wires, approx. 0.9 m, halogen-free
  • Integral display


Construction

Type GT-VM-DD3 for volume flow rate measuring unit

  • For VME, all dimensions

  • For VMR, all dimensions


Commissioning

  • Completely factory-set
  • On-site adjusting is not required


Useful additions

  • Adjustment device GUIV-A
  • PC software WIN-VAV


Technical information

Function, Technical data, Specification text, Order code

  • Function
  • TECHNICAL DATA
  • SPECIFICATION TEXT
  • ORDER CODE
Principle of operation of volume flow rate measuring unit Funktionsprinzip_XTDailink.ai.link

① Effective pressure transducer (dynamic measurement principle)

② Transducer for converting the differential pressure signal into a volume flow rate signal

③ Analogue actual value signal


The volume flow rate measurement is carried out by measuring the effective pressure. For this reason the measuring unit is fitted with an effective pressure sensor. The effective pressure is converted into a voltage signal by an effective pressure transmitter with a dynamic measurement principle. The volume flow rate actual value is hence available as a voltage signal. Due to factory adjustment, 10 V DC always corresponds to the nominal flow rate (qvnom;). Voltage ranges are stored in the transducer. 



Effective transducer for volume flow rate measuring units

Type

Part number

Volume flow rate measuring unit

GT-VM-DD3

A00000047143

VME, VMR




Effective pressure transducer GT-VM-DD3

Measurement principle/installation orientation

Dynamic measurement principle, position-independent

Supply voltage

24 V AC/DC ±20 % 50/60 Hz

Power consumption (when running/when idle)

0.5 W

Power rating

1.5 VA

Actual value signal output0 – 10 V DC or 2 – 10 V DC; 0.5 mA max.
IEC protection class

0 – 10 V DC, Ra > 100 kΩ or 2 – 10 V DC, Ra > 50 kΩ

Protection level

0 – 10 V DC or 2 – 10 V DC, 0.5 mA max.

EMC

EMC to 2014/30/EU
Weight

0.15 kg



Range of display functions

Display functions

  • Volume flow rate actual value (unit optionally m³/h, l/s)
  • Display via 3-character display with position valuation labelling (upstroke symbolises thousands of digits)


Setting options

  • Unit of the volume flow rate display m³/h or l/s
  • Signal voltage range 0 – 10 V or 2 – 10 V DC

Category

  • Measuring units for volume flow rate

Application

  • Recording of a constant or variable volume flow rate actual value, e.g. for connection to the central building management system for the purpose of monitoring or integration into a room balancing system.

Area of application

  • Differential pressure transducer with dynamic measuring principle for clean air in ventilation and air conditioning systems

Installation orientation

  • Either direction

Connection

  • Connecting cable with 3 wires, halogen-free

Supply voltage

  • 24 V AC/DC

Interface

  • Analogue signal 0 – 10 V or 2 – 10 V DC

Interface information

  • Volume flow rate actual value

Special functions

  • Display for showing the volume flow rate actual value (m³/h or l/s) and adjustment of the signal characteristic and the volume flow rate unit

Parameter setting

  • Parameters specific to measuring unit are factory-set
  • Signal characteristic is factory-set
  • Subsequent adjustment on the device itself or via optional tools: adjustment device, PC software (wired in each case)

Factory condition

  • Electronic transducer factory-mounted on the measuring unit
  • Factory-set parameterisation and testing of air distribution technology; certified with sticker

VMEP1 / 600x400 / XTD / 0
|||||
13579

1 TypeVME Volume flow rate measuring unit 3 MaterialNo entry required: Galvanised sheet steel (standard construction)P1 Powder-coated RAL 7001, silver grey 5 Nominal size [mm]B × H 7 Attachments (control components)XTD Effective pressure transducer with dynamic measurement principle and display 9 Signal voltage range
0 0 – 10 V DC2 2 – 10 V DC  

Order example: VME-P1/400x300/XTD/0
MaterialsWith powder coating
Nominal size400 × 300 mm
AttachmentEffective pressure transducer with dynamic measurement principle and display
Operating modeSignal voltage range 0 – 10 V DC corresponds to 0 – qvnom;
Signal voltage range0 – 10 V DC
 

Variants, Product details

  • VARIANTS
  • PRODUCT DETAILS

*see pictures

Analogue interface 0 – 10 V or 2 – 10 V DC

The analogue interface can be set for signal voltage range 0 – 10 V DC or 2 – 10 V DC. The assignment of volume flow rate actual values to voltage signals is shown in the characteristic curves. 

  • The signal voltage range is pre-set in the factory in accordance with the order code entries 
  • Signal voltage range adjustable by others on the unit using a potentiometer and integral display or with service tools


Actual value as feedback for monitoring or tracking control

  • On terminal U, the actual volume flow rate measured by the controller can be tapped as a voltage signal
  • The selected signal voltage range 0 – 10 V DC or 2 – 10 V DC is shown in the volume flow rate range 0 – qvnom; .



Commissioning

  • On-site adjusting is not required
  • After successful installation and wiring, the measuring unit is ready for use
  • Observe the volume flow rate ranges of the measuring unit; in particular, the rate may not fall below the minimum volume flow rate.

Downloads

product information

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Our department for Service-Requests will contact you asap.
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Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265