*  Fabric Filter Performance Monitoring *  Particulate Emissions Monitoring System *  Single point or network solution (up to 32     sensors) *  Built-in data recording and reporting *  US Patented AC Electrodynamic measurement    principle         (an advanced Triboelectric method)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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The DA550 is a cost-effective dust emission monitoring system for baghouses, incorporating network and advanced graphics capability usually associated with more advanced systems.  It is designed for use in any process which has particulate control installed (e.g. bag, ceramic and cartridge filters; cyclones and spray driers) where dust monitoring is required.  The system comprises up to 32 networked sensors, a central control unit, data acquisition and optional reporting software. 

 

 

 

The DA550 uses patented AC Electrodynamic technology, an advanced Triboelectric method.  The DC signal created by particles colliding with a probe inserted in a stack is electronically filtered out, leaving an AC signal resulting from charge particles passing and interacting with the rod.  Since teh signal includes no DC component, the instrument has minimal cross sensitivity to changing velocity* and has increased stability even with dust build up on the rod sensor.  The dust signal is amplified, digitized and processed at the probe, consistent with good signal to noise design techniques.  The processed signal is proportional to dust concentration, although the exact correlation is application dependent.  Instruments using the same Electrodynamic technology have had this linear relationship validated in independent certification tests (specifically German TUV, BlmSchV 17, and UK MCERTS on bagfilters).

 

An insulated probe option is also available to minimize false signals resulting from dust build up at the base of the sensor, which can occur in process dryer and conductive dust applications.  Unlike other insulated sensors, this sensor operates with AC signal analysis, which provides measurement stability, velocity insensitivity and tolerance to dust coating on the sensing part of the rod.

 

*Insignificant effect for velocities between 8-20m/s. 

 

 

 

The DA550 has the tools to satisfy the EPA guidance procedure for fabric filter bag leak detection.  Its minimum detection level of 0.1mg/m3 easily meets the EPA requirements under the MACT standards.

 

Consistent with EPA guidance, the instrument has two options to set alarms:

 

1.)  Using dust peak height as an early indication of filter failure.

2.)  Using average dust level to identify significant filter failure.  Alarm delay is used to discriminate filter failure from dust pulses arising from bag cleaning.

 

Recording of emission alarms and average emissions (pulse, short-term or long-term) is built into the control unit and optional 'DustReporter 2' software can be used to download data from teh control unit and produce reports.

 

An optional signal generator can be used to satisfy the EPA requirements for monthly zero and span drift checks.  The alternative DT990 has automated zero and span drift checks.  The alternative DT990 sensor has automated zero and span checks for users who wish to save manpower.  The DT990 sensor has additional features listed below:

 

Features Comparison		DT990	DA550
Quality Assurance/Audit	Self test Alarm log and Audit Path	Continuous	Manual by written log
	Sensor Diagnostic Check	Automatic	Manual using procedures below
	Monthly electronic Zero Check	Automatic (every hour)	Manual using signal generator
	Monthly electronic Span Check	Automatic (every hour)	Manual using signal generator
	Contamination Check	Continuous	Removing sensor from stack and inspection
	QA Screen	Continuous	None
Sensor Capability	Signal Time Constant	Instant and Average	Instant or Filtered
	Reproducibility*	>50	>30
	Dynamic Range	1,000;000 (Dynatrack)	10;000:1
	Minimum Detection Level	0.01 mg/m3	0.1 mg/m3
*Reproducibility = certification range / standard deviation for two instruments in field trial as independently evaluated by TUV.

Control Unit Features

 

	Single Channel	Multi-Channel
Number of Channels	1	1 - 32
Order Code	DA550S--CON	DA550M--CON
Size (mm)	220w x 123h x 80d	260w x 160h x 90d
Power Supply	90-260 VAC (50/60 Hz)	90-260 VAC (50/60 Hz)
Enclosure Rating	IP65	IP65
User Screens	- Set-up  - Trends  - Memory  - Alarm Log  - Bargraph	- Set-up  - Trends  - Memory  - Alarm Log  - Multiple Bargraph  - System Overview
Memory	User defined: Pulse, Short OR Long	User definted: Pulse, Short OR Long
Output	1 x 4-20mA  2 x Relay  RS232/485 (MODBUS)	4 x 4-20 mA*  4 x Relay*  RS232/485 (MODBUS)  Ethernet (option)
* For additional outputs analogue and relay output modules are available.

PCME-US is a division of B3 Systems, Inc.

B3 Systems, Inc. is an independent distributor of PCME, Ltd. products.