Item # 0695 0550, VA 550 Insertion Type Flowmeter On Compressed Air Systems, Inc.

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	Item # 0695 0550, VA 550 Insertion Type Flowmeter
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Flow sensor for installation in existing compressed air or gas line of 3/4" to 40"

Housing rotatable, display 180º rotatable (on the head). Settings can be modified via display, flow meter can be reset

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Financing · Specifications · Advantages of Optical Keys · Special Measurement Technology Features · Special Mechanical Features · Connection to Different Bus Systems Options · Additional Information

Financing

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Specifications

Measuring Range

Up to 164 ft/s, Low-Speed Version
Up to 304 ft/s, Standard Version
Up to 607 ft/s, Maximum Version
Up to 735 ft/s, High-Speed Version

Note for Measuring Range

Measuring range SCFM for different pipe diameters and gases
All measured values related to DIN 1343 standard conditions 0º and 1013 mbar ex works.

Accuracy

± 0.3% of Full Scale (F.S.)
± 1.5% of Measured Value (M.V.)

Accuracy on Request

± 1.0% of Measured Value (M.V.)
± 0.3% of Full Scale (F.S.)

Accuracy Indications

Relative to Ambient Temperature 71.6 ºF +2 ºF, System Pressure 87 psi

Repeatability

0.25% of Measured Value (M.V.) in Case of Correct Mounting (Mounting Aid, Position, Inlet Section)

Measuring Principle

Thermal Mass Flow Sensor

Response Time

t 90 <3 sec

Operating/Ambient Temperature Range

-4 to 158 ºF

Media Temperature Range

-4 to 356 ºF

Media Temperature Range (ATEX Version)

-4 to 248 ºF

Adjustment Possibilities via Display, External Hand- Held Device PI 500, PC Service Software, Remote Diagnosis

Nm³/h, Nm³/min, Nl/min, l/s, ft/min, cfm, kg/h, kg/min, inner diameter, reference conditions ºC/ºF, mbar/hPa, zero point correction, leak flow volume suppression, scaling analog output 4...20 mA, pulse/alarm, error codes etc.

Standard Outputs

1 x 4 to 20 mA Analog Output (Electrically Not Isolated)
Pulse Output
RS 485 (Modbus-RTU)

Optional Outputs

2 x 4 to 20 mA Active
HART
M-Bus
Mod- bus TCP
Profibus DP
Profinet

Burden

<500 Ω

Additional Average Value Calculation

For all parameters freely adjustable from 1 minute up to 1 day, e. g. 1/2 hours average value, average day value

Protection Class

Ingress Protection (IP 64) for ATEX II 2D Ex tb IIIC T90ºC Db
Ingress Protection (IP 67)

Housing Material

Die-Cast Aluminum

Sensor Tube Material

Stainless Steel 1.4404

Screw-In Thread

G 1/2 in. (International Organization for Standardization (ISO 228))
National Pipe Thread (NPT) 1/2 in.
PT 1/2 in.
R 1/2 in.

Operating Pressure

232 psi

Special Version Operating Pressure¹

580 psi

Direct Current (DC) Supply Voltage

18 to 36 V

Power Supply

5 W

Approval

ATEX II 2G Ex db IIC T4 Gb
ATEX II 2D Ex tb IIIC T90 ºC Db
DVGW

¹ With DVGW approval max. 232 psi

Advantages of Optical Keys

The sensor can also be configured in the ATEX area, without the housing needing to be opened.

Special Measurement Technology Features

4 values on the display: Flow, total consumption, velocity, temperature. Units freely adjustable
All measured values, settings such as gas type, inner diameter, serial number and so on can be accessed via Modbus-RTU
Comprehensive diagnostic functions readable on the display or remote access via Modbus such as calibration cycle, error codes, serial number
Notification in case of exceeding the calibration cycle
Standard version accuracy 1.5% of m.v. ± 0.3% of f.s.
Precision version accuracy 1.0% of m.v. ± 0.3% of f.s
Measuring span of 1 : 1000 (0.33 ft/s up to 735 ft/s)
Configuration and diagnosis via display, hand-held device PI 500, PC service software on-site
Gas type (air, nitrogen, oxygen, argon and so on) freely adjustable via PC service software or external device DS 400, DS 500, PI 500
Reference conditions ºF and mbar/hPa freely adjustable
In-Situ adjustment, leak flow volume suppression
Pressure loss negligible

Special Mechanical Features

Robust impact-proof aluminum die cast housing for the outdoor area IP 67
All wetted parts made from stainless steel 1.4571
Suitable as an insertion version for 3/4" to 40"
On request with DVGW approval for natural gas (up to 232 psi)
Pressure range up to 725 psi, special version up to 1450 psi
Media temperature range up to 356 ºF (ATEX version up to 248 ºF)
No moveable parts, no wear
Sensor tip very robust, easy to clean
Easy installation and removal under pressure via 1/2" ball valve
Housing rotatable, display rotatable by 180º
Safety ring for installation and removal under pressure
Depth scale for precise installation

Connection to Different Bus Systems Options

There are different options available for connection to modern Bus systems:

Ethernet interface (Modbus-TCP) / PoE
M-BUS
Modbus-RTU
Profibus DP interface (in process)
Profinet interface (in process)
HART (in process)

Additional Information

Easy mounting/dismounting of VA 550 under pressure - without disconnection of the line - without emptying the line

If there is no suitable measuring site with 1/2" ball valve, there are two simple possibilities to set up a measuring site:
A Weld on a 1/2" screw neck and screw on a 1/2" ball valve
B Mount spot drilling collar including ball valve
By means of the drilling jig, it is possible to drill under pressure through the 1/2" ball valve into the existing pipe. The drilling chips are collected in a filter.
Then the probe can be mounted.

DOWNLOADS


		Datasheet for VA 550 Insertion Type Flowmeters (PDF, 946KB)

Item # 0695 0550, VA 550 Insertion Type Flowmeter

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