Static differential pressure transducers
X X Static
4.2 –
differential pressure transducers testregistrierung
Differential pressure
transducers for volume
flow rate measuring units
Type Static differential
pressure transducers
4
For the static effective and differential
pressure measurement
Differential pressure transducers based on the static measurement
principle for volume flow rate measuring units Type VMR, VMRK or VME
■ Linear volume flow rate actual value 2 – 10 V DC
■ Recording of measured values for the display of volume flow rates
or for the control of slave controllers
■ Parameters are factory set
Universal controller VRP
05/2015 – DE/en
K5 – 4.2 – 5
Differential pressure transducers for volume flow rate measuring units
General information
Static differential pressure transducers
Type
Page
Static differential pressure
transducers
Description
Universal controller VRP
4
Any attachments must
be defined with the order
code of the volume flow
rate measuring unit.
4.2 – 6
4.2 – 7
Basic information and nomenclature
4.3 – 1
Application
– Electronic volume flow controller Universal
with static differential pressure transducer
for use with volume flow rate measuring units
– For applications with polluted extract air,
e.g. with fluff, sticky particles
or aggressive substances
– Parameters are factory set
– On-site adjusting is not required
– 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
Installation and commissioning
– Installation orientation is relevant
– Zero point correction required
Maintenance
– Zero point correction
once per year is recommended
Static differential pressure transducers for volume flow rate measuring units
Order code detail
Controller
Part number
BB0
Function
General information
Special information – BB0
M546EG2
Volume flow rate
measuring unit
Static differential pressure transducer
Type
Part number
VRP
M546EJ1
Type
VFP-300
VMR, VME, VMRK
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 static
differential pressure transducer
(diaphragm 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 (nom).
Principle of operation – static differential
pressure transducer
‫ݑ‬
+
̋
‫ݢ‬
‫ݤ‬
‫ݣ‬
① Differential pressure transducer
② Volume flow controller
③ Actual value signal
K5 – 4.2 – 6
05/2015 – DE/en
Differential pressure transducers for volume flow rate measuring units
Special information – BB0 Static differential pressure transducers
Description
/ BB0
Order code detail
Application
– Electronic volume flow controller VRP
with static differential pressure transducer
for use with volume flow rate measuring units
– Separate casings for differential pressure
transducer and controller electronics
Signal voltage range
– 2 – 10 V DC
Technical data
Installation and commissioning
– Installation orientation is relevant
– Zero point correction required
Maintenance
– Zero point correction once per year
is recommended
Volume flow controller VRP
Supply voltage (AC)
Power rating (AC)
Setpoint value signal input
Actual value signal output
IEC protection class
Protection level
EC conformity
24 V AC ± 20 %, 50/60 Hz
without actuator max. 2.6 VA
2 – 10 V DC, Ra >100 kΩ
2 – 10 V DC linear, max. 0.5 mA
III (protective extra-low voltage)
IP 42
EMC according to 2004/108/EC
4
Universal controller VRP
Static differential pressure transducer VFP-300
Supply voltage
Measuring range
Linearity
IEC protection class
Protection level
EC conformity
from the controller
0 – 300 Pa
± 3 Pa
III (protective extra-low voltage)
IP 42
EMC according to 2004/108/EC
Static differential pressure
transducer VFP-300
05/2015 – DE/en
K5 – 4.2 – 7
Differential pressure transducers for volume flow rate measuring units
Special information – BB0 Static differential pressure transducers
Function
VRP
VFP-300
‫ݣ‬
‫ݤ‬
‫ݢ‬
‫ݣ‬
‫ݦ‬
‫ݥ‬
① Controller VRP
② min potentiometer
③ max potentiometer
④ Cable for differential pressure transducer
⑤ Actuator cable
Characteristics
① Connecting cable to Universal controller
② Tube connection for effective pressure sensor
Characteristic of the actual value signal
Terminal connections
‫ݑ‬Nenn (100%)
1
͛
Einstellbereich
Wiring
Volumenstrom
4
‫ݢ‬
‫ݑ‬min Gerät
0
10 V DC
2
Istwertsignal U5
2
~
3
4 5
Íˣ Íˤ U5
6
y
7
z
Universal
‫ݢ‬
‫ݣ‬
① Plug connection for differential pressure transducer
VFP
② Plug connection for actuator
1 ⊥:
Ground, neutral
2 ~:
Supply voltage
3 w₁:
Setpoint value signal
4 w₂:
Setpoint value signal (0 – 20 V phase cut)
5 U5:
Actual value signal
6 y:
Actuator signal
7 z:
Override control
Universal: VRP
2 – 10 V DC
‫ݑ‬Ist = U5 ̋ 2 ‫ݑ‬Nenn
8
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4.3 –
X X Grundlagen
und Definitionentestregistrierung
Volume flow rate
measurement
Basic information
and nomenclature
4
■ Product selection
■ Principal dimensions
■ Nomenclature
■ Construction
■ Sizing and sizing example
05/2015 – DE/en
K5 – 4.3 – 1
Volume flow rate measurement
Basic information and nomenclature
Product selection
Type
VMR
VME
VMRK
VMLK
Supply air
●
●
●
●
Extract air
●
●
●
●
●
●
Type of system
Duct connection
Circular
●
Rectangular
●
Volume flow rate range
Up to [m³/h]
6048
36360
6048
1854
Up to [l/s]
1680
10100
1680
515
Filtered
●
●
●
●
Office extract air
●
●
●
●
Polluted
○
○
●
●
Contaminated
○
○
●
●
Manually
●
●
●
Automatically
○
○
○
●
●
●
●
●
Air quality
Volume flow rate measurement
4
Special areas
Labs, clean rooms, operating theatres
(EASYLAB, TCU-LON II)
●
○
Possible
Possible under certain conditions: Robust unit variant and/or specific differential pressure transducer
Not possible
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Volume flow rate measurement
Basic information and nomenclature
Principal dimensions
Nomenclature
Constructions
ØD [mm]
VAV terminal units made of stainless steel:
Outside diameter of the spigot
VAV terminal units made of plastic:
Inside diameter of the connecting spigot
B₂ [mm]
Outside dimension of flange (width)
ØD₁ [mm]
Pitch circle diameter of flanges
H [mm]
Duct height
ØD₂ [mm]
Outside diameter of flanges
H₁ [mm]
Screw hole pitch of flange (vertical)
ØD₄ [mm]
Inside diameter of the screw holes of flanges
H₂ [mm]
Outside dimension of flange (height)
L [mm]
Length of unit including connecting spigot
H₃ [mm]
Unit height
L₁ [mm]
Length of casing or acoustic cladding
n[]
Number of flange screw holes
B [mm]
Duct width
T [mm]
Flange thickness
B₁ [mm]
Screw hole pitch of flange (horizontal)
m [kg]
Weight including attachments for the automatic
differential pressure measurement
nom [m³/h] and [l/s]
Nominal volume flow rate (100 %)
K value [m³/h] and [l/s]
Unit-related constant for air density 1.2 kg/m³
min [m³/h] and [l/s]
Volume flow rate
Δpw [Pa]
Effective pressure
Δ [± %]
Volume flow rate accuracy
Δpst [%]
Static differential pressure in relation
to the measured effective pressure
Galvanised sheet steel
– Casing made of galvanised sheet steel
– Parts in contact with the airflow as described
for the product type
– External parts, e.g. mounting brackets
or covers, are usually made of galvanised
sheet steel
Stainless steel (A2)
– Casing made of stainless steel 1.4201
– Parts in contact with the airflow
are powder-coated or made of stainless steel
– External parts, e.g. mounting brackets
or covers, are usually made of galvanised
sheet steel
B₃ [mm]
Width of device
Powder-coated surface (P1)
– Casing made of galvanised sheet steel,
powder-coated RAL 7001, silver grey
– Parts in contact with the airflow
are powder-coated or made of plastic
– Due to production, some parts that come into
contact with the airflow may be stainless steel
or aluminium, powder-coated
– External parts, e.g. mounting brackets
or covers, are usually made of galvanised
sheet steel
05/2015 – DE/en
K5 – 4.3 – 3
4
Volume flow rate measurement
Basic information and nomenclature
Sizing with
the help of this catalogue
This catalogue provides convenient quick sizing
tables for volume flow rate measuring unit,
based on aerodynamic data. Volume flow rate
ranges are provided for all nominal sizes.
Sizing example
Given data
max = 280 l/s (1010 m3/h)
Quick sizing
VMR/200
C = 25.5 l/s (92 m3/h)
∆pst = 19 %
∆pw = 121 Pa
∆pst = 23 Pa (121 Pa × 0,19)
Easy Product Finder
4
The Easy Product Finder
allows you to size
products using your
project-specific data.
You will find
the Easy Product Finder
on our website.
K5 – 4.3 – 4
05/2015 – DE/en