envea STACK 602, User Manual

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9 Maintenance STACK 602
18
(PC-000848-MA Issue 5, December 2021)
ENVEA UK Ltd
3.
Product Description
3.1 System Overview
The STACK 602 particulate monitoring system is a Modbus-based, cross-stack
optical measuring system that uses a dynamic sensing technique to measure the
rate of change of light using
DynamicOpacity
®
ratiometric opacity technology as
particulates pass through a modulated light beam. This proven optical technique,
coupled with advanced design features, provides reliability and resolution
advantages over traditional opacity monitors.
The STACK 602 is designed to be compliant with TUV approved standards. The
instrument is comparable and has the identical quality of measurement to its pre
-
decessor, the SC600T, which achieved both TUV QAL1 and MCERTS approvals.
3.1.1 Sensor
– DynamicOpacity
® Transmitter/Receiver
Figure 3: STACK 602 – DynamicOpacity
®
Transceiver/Receiver.
1 ................................... Sensor enclosure (with hinged lid)
2 ........................ Flanged sensor body (with air purge inlet)
3 ..................................................... Alignment aid (fixed)
4 ......................................................................... Flange
5 ............................ Air purge inlet (with diffuser connector)
6 ................................................... Alignment bolts (3 off)
The sensor heads (Transmitter and Receiver) use
DynamicOpacity
®
technology,
therefore requiring less maintenance and servicing time than standard opacity
instruments. Dynamic Opacity (‘Dust’) mode means the STACK 602 uses a
ratiometric measurement method with the significant advantage that this ratio is
unaffected by lens contamination. This allows the instrument to operate even if
the lens contamination exceeds 90%. Air purges should be connected to the
sensor heads to provide a positive displacement of air away from the lens
surfaces.