D-FL 220 volume flow measuring system

The D-FL 220 is a volume flow measuring system for ultra-sonic measuring of flow and volume flow, especially for wet and aggressive smoke emissions.

Область применения

As an in-situ measuring system, the measuring equipment determines the measured values without sampling directly in the duct through which gas is flowing.

Application areas

Volume flow measuring at low speeds
Plants with damp and/or aggressive exhaust gas, for example, in waste incineration plants
Volume flow measurement at high dust content

Certifications

Suitability-tested by TÜV Cologne, test report 936/21218490/A
Certified according to DIN EN 15267-3
Itemized in the list of suitable measuring devices for continuous emission measuring

Дизайн

System components D-FL 220

Measuring heads

Two identically designed measuring heads, set for type A and type B, are used. Depending on the application data, different depth-of-penetration lengths are required, for example, from 100 to 1100 mm.

Stainless steel 1.4571 is used as probe material. The housing is made of impact-proof polyamide.

A 4 mA to 20 mA current signal is available as measured value output which measures the velocity and/or the volume flow and can be connected, for example, to a emission evaluation calculator or a recorder. Two relay contacts are available for signaling. Also available is a Modbus interface according to VDI 4201-3 for the connection of an emission evaluation calculator with digital interface. The various parameters are entered during the installation on site. The USB port is on the rear.

Purge flanges

The purge air which cools the ultra-sonic transducer and keeps it clean is supplied via purge flange (one for each measuring head). A toggle-type fastener connects the purge flange to the measuring head.

Mounting tubes with flange

Mounting tubes made of stainless steel 1.4571 or of glass-fiber reinforced plastic, adapted to the plant conditions, are available.

Purge air unit

A hose connects the two measuring heads to the purge air unit. The filtered air is used to cool the measuring heads and to keep the transducers clean.

Terminal box

Terminal box to output the data with connecting cable for the two sensors and customer terminal strip.

Software D-ESI 100

Software to assign parameters, to visualize the measured data, and to carry out AST, QAL2 and QAL3.

The D−ESI 100 can be parameterized, maintained and (when faults occur) analyzed via the USB port with the help of a PC and the associated software.

Optional:

Universal control unit D-ISC 100

The connected equipment can be operated and configured conveniently using the D-ISC 100. The display provides an immediate overview of the current measured values and the status of the measuring instruments.

Weather protection covers

Weather protection covers are available to protect the measuring heads when the measuring system is installed outdoors.

Additional options:

Absolute pressure transducer
Temperature transducer

Функции

The D-FL 220 measuring system operates according to the acoustic transit time differential method.

Two identical sensors transmit and receive ultra-sonic pulses reciprocally. The system calculates precisely the gas velocity and the gas temperature from the transit time difference dependent on the direction. The volume flow is calculated taking into consideration the cross-section, the sample gas temperature and the absolute pressure. The D-FL 220 performs internal self-monitoring routines and is very low maintenance.

Особенности

In-situ measuring method
Measurement possible below dew point and for high dust concentrations
Continuous measurement of normal volume flow and gas velocity
Automatic zero point and reference point control
Remote access possible, digital interface according to VDI 4201-3
Operation with or without control unit
Extremely low maintenance, maintenance interval 6 months

Технические данные

Measured variables	Flue gas velocity Volume flow¹⁾ Temperature
Measuring ranges	0 ... 40 m/s 0 ... 3 000 000 m³/h 0 ... 400 °C
Measuring principle	Ultrasonic transit-time differential
Sample gas temperature	0 ... 300 °C, optional higher
Sample gas pressure	-50 ... +20 hPa, optionally higher
Channel diameter	0.5 ... 13 m, temperature-dependent
Ambient temperature	-20 up to +50 °C, measuring head -40 up to +70 °C
Degree of protection	IP65
Measured value output	0/4 ... 20 mA, 400 Ω Modbus RTU bi-directional
Digital outputs	2 relay outputs, load rating 48 V/0.5 A
Digital inputs	None
Accuracy	< 2 %
Detection limit	< 0.3 % of measuring range
Reference point drift	< 0.3 % of measuring range / month
Zero point drift	< 0.2 % of measuring range / month
Auxiliary power	24 V DC/0.5 A
Dimensions standard measuring head	Ø 190 x 570 mm
Weight	17 kg
Purge air supply
Purge air quantity	Approx. 80 m³/h
Auxiliary power	115/230 V, 50/60 Hz, 0.37/0.43 kW
Dimensions (H x W x D)	350 x 550 x 500 mm
Weight	12 kg
Degree of protection	IP55

¹⁾Optional pressure and temperature correction

Дальнейшая информация

Please consult your Siemens sales partner for information on how to correctly configure and order a D-FL 220 measuring system for a Siemens CEMS project.