TSI Instruments dusttrak II 8530, Руководство по эксплуатации и обслуживанию

Страница: 34 / 79

Chapter 3 24
Flow Cal
Run Flow Cal to change the flow set point. The flow set point is factory set to
3 L/min total flow. 2 L/min of the total flow is measured aerosol flow. 1 L/min
of total flow is split off, filtered, and used for sheath flow. There is an internal

P flowmeter in the DustTrak II instrument that controls flow rate to ±5% of
the factory setpoint. TSI recommends checking the flow with an external flow
reference meter, especially when collecting data. The pump will automatically
start when entering the Flow Cal screen.
1. Attach a flow calibrator (reference flow meter) to inlet port. You may use
a bubble buret, mass flow meter, dry piston or rotameter as flow
measurement devices.
2. Move the arrows up or down to achieve desired flow rate on the
reference flowmeter. Each up or down arrow will change the flow about
1%. Allow time between button presses to let pump change to the new
flow rate.
Select Save once the desired flow rate is achieved. Select Undo to
return to the factory set point.
N o t e
The flow rate can be adjusted from approximately 1.5 to
4.0 L/min. If needed, this feature can be used to adjust the flow
rate to a value other than the factory set point, allowing for the
use with the provided Dorr-Oliver Cyclone (1.7 L/min required) or
3
rd
party size selective inlets (cyclones or impactors) that may
require a different flow rate.