TSI Instruments DustTrak 8540, Operation And Service Manual

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Chapter 3 18
NOTE – Models 8543, 8543-M
The flow rate can be adjusted from approximately 1.5 to
4.0 L/min. This feature allows you to re-adjust the flow rate,
if needed, to 3.0 L/min. The flow rate for the DRX models
should remain fixed at 3.0 L/min. No size-selective inlets or
cyclones should be installed on the inlet of the instrument
during its normal operation.
Click on the Zero tab to manually perform a zero calibration for the
instrument. Click Start Zero to start the zeroing process.
The “Last Zero” and “New Zero” values do not represent particle
count or aerosol mass. These values are associated with the signal
received by the photometric sensor when no particles are passing
through the optics.
Figure 12: Checkout Application
– Zero tab
The Laser tab is only accessible in password-protected
“Engineering Mode.” Changes made to the Laser setting will directly
affect the calibration, the instrument response, and is available only to
TSI
®
technicians.