The DT370 series instruments utilize PCME's unique Electrodynamic measurement principle. When the sensing probe is installed in the duct or stack, particles in the air stream interact with the sensing rod and a charge induction effect is analysed from the probe.

 

Distributions in the particle stream result in a frequency charge induction response which is proportional to the concentration of particles (application dependent). Unlike triboelectric systems, Electrodynamic systems electronically filter out the do signal caused by particle collision, ,Nhich makes the quality of the measurement unaffected by build-up on the probe which would otherwise cause zero or calibration drift. Very low concentrations of particulate found after even the most efficient bag filter can be measured due to this unique Electrodynamic technique.

 

Modes of Operation. The DT370 series instruments are particularly suited for monitoring particulate emissions from industrial applications controlled with bagfilter-type arrestment plant having rugged performance and sufficient resolution for these applications. The instrument's output is directly proportional to particulate and may be used to monitor emission tendencies or calibrated in mg/m3 by comparison to the results of an Iso-kinetic (gravimetric) sample. The instrument has in-built data recording and graphics display capability enabling emission trends to be easily viewed and plant data can be averaged and recorded in the instrument for alarm purposes and external emissions reporting (via optional DustReporter 2).

 

All DT370 type instruments have an in-built dorm log which ensures all alarm conditions (emission events, self-check results, instrument failure) are properly stored for reporting purposes and have a separate user defined data log which may be set-up to record data for one of the following purposes:

Broken bag mode (pulse log)

- Short term emission poises arising from bag cleaning can be recorded and analysed (2 hours of pulse data to cover multiple cleaning cycle)
- Permits anticipation of arrestment plant failure
- Assists location of broken bags
Process control mode (short term log)
- Stores instantaneous or short term average data for past 24 hours
- Emissions can be reviewed on instrument for effective trend analysis
for more information on products email Click here

  Emissions reporting mode (long term log)
- Calculates and stores emission averages for up to 600 days (@ 15 min average)
- DustReporter 2 PC software used for data archiving and external reporting

DT370