D-R 290 dust concentration measuring instrument - new generation

The D-R 290 is a dust concentration measuring instrument for plants with small to medium dust concentrations.

Область применения

The D-R 290 monitors not only the efficiency of the filter plants by registering the residual dust content, but also reports instantaneously when permissible levels of dust or flue gas emissions are exceeded. As a result, it is often possible to intervene directly in the process of the plant being monitored, thus ensuring reliable compliance with the specified limits.

Application areas

Furnace plants with semi-anthracite coal, brown coal, fuel oil and multi-fuel firing
Converter plants, asphalt mixing plants
Cement manufacturing plants

Certifications

Suitability-tested by TÜV Cologne, test report 936/21226948/A
Certified according to DIN EN 15267-3
Itemized in the list of suitable measuring devices for continuous emission measuring
MCERTS

Дизайн

System components D-R 290

Measuring head

The transmitter and receiver optics are integrated together with the electronics to form a compact unit housed within a rugged and robust aluminum enclosure. The measuring head is mounted on the weld-in flange.

Reflector

The reflector is installed in a rugged and robust aluminum housing. The reflector is mounted on the weld-in flange directly opposite the measuring head.

Purge air unit

A hose connects the measuring head and the reflector with the purge air unit. The filtered air is used to keep the scattered light interfaces of the measuring head and the reflector clean.

Optional:

Universal control and display unit D-ISC 100

The connected equipment is easy to configure and operate using the D-ISC 100 universal control and display unit. The display provides an immediate overview of the current measured values and the status of the measuring instruments.

Quick-closing shutters

The quick-closing shutters are mounted on the measuring head and the reflector side between the weld-in flanges and the connected devices (measuring head, reflector). In the event of a fault (failure of the power supply or purge air) they automatically close the path between the exhaust gas duct and the measuring equipment.

Electronics for quick-closing shutter

A control electronics system is required for each quick-closing shutter.

Measured value acquisition

In the simplest case the measured values and reference values are transferred to the plant's control system. The measured values and status signals that are output can also be fed to an emission calculator system for further processing, either via discrete signals (4 to 20 mA and configurable relay contacts) or via Modbus according to VDI 4201-3.

Weather protection covers

Weather protection covers are available to protect the measuring head, the reflector, the purge air unit and the terminal boxes when the measuring system is installed outdoors.

Additional options:

Explosion proof version for Ex p, Zone 1 or Zone 2, 22
Temperature compensation
Filter set for sensitivity and linearity control

Функции

The device operates using the double-pass method according to the auto-collimation principle. The light beam traverses the measuring distance twice. The attenuation of the light beam by the dust content in the measuring section is measured and evaluated.

The universal control unit D-ISC 100 can be connected for the measured value display and parameter assignment, which allows up to eight dust and flow-rate measurement instruments.

The connected equipment is easy to configure and operate using the D-ISC 100. The display provides an immediate overview of the current measured values and the status of the measuring instruments.

Особенности

In-situ measuring procedure, continuous measurement
Super-wide band diode (SWBD), provides more stable measuring results in comparison to devices with conventional LEDs
Convenient operation, remote access option
Automatic zero point and reference point control
Automatic monitoring and correction of contamination
Easy adjustment without additional equipment
Low-maintenance thanks to optimal purge air conduction
Data transmission via Modbus, in compliance with VDI 4201-3

Технические данные

Measured variables	Opacity Extinction
Measuring ranges
Opacity	0 ... 20 to 0 ... 100 %
Extinction	0 ... 0.1 to 0 ... 2.0
Dust¹⁾	0 ... 80 mg/m³to 0 ... 4 000 mg/m³
Measuring principle	Transmission
Sample gas temperature	Above dew point up to 250 °C, optional up to 1,000 °C, depending on application
Sample gas pressure	-50 ... +20 hPa, optionally higher
Channel diameter	1 ... 18 m
Ambient temperature	-40 ... +60 °C
Degree of protection	IP65, Ex optional
Measured value outputs	0/4 ... 20 mA, 400 Ω Modbus RTU bi-directional
Digital outputs	2 relay outputs, permissible load 60 V DC, 30 V AC/0.5 A
Digital inputs	None
Accuracy	< 1 % of measuring range
Detection limit	0.75 % at extinction 0 ... 0.1
Reference point drift	< 0.4 % of measuring range/month
Zero point drift	< 0.4 % of measuring range/month
Auxiliary power	24 V DC/0.5 A
Dimensions (H x W x D) measuring head	363 x 185 x 398 mm
Weight	17 kg
Purge air supply
Purge air quantity	Approx. 80 m³/h
Auxiliary power	115/230 V AC, 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⁾ with reference to 1 m of path length after gravimetric calibration

Дальнейшая информация

Please consult your Siemens sales partner for information on how to correctly configure and order a D-R 290 measuring instrument for a Siemens CEMS project.