TSI Incorporated DUSTTRAK DRX 8533, Руководство по эксплуатации и обслуживанию

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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 DRX instrument that controls flow rate to ±5% if
factory setpoint. TSI recommends checking the flows 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 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.
3. Select Save once the desired flow rate is achieved. Select Undo to
return to the factory set point.
Note
The flow rate can be adjusted from approximately 1.5 to
4.0 L/min. For Model 8533/8534, the FlowCal feature allows you
to re-adjust the flow rate to 3.0 L/min. While the flow rate for
Model 8533/8534 is fixed at 3.0 L/min, the flow rate for Model
8530/8532 can be changed. This allows for the use of other size
selective inlets like cyclones or impactors with Model 8530/8532.
No size-selective inlets should be installed on the inlet of
Model 8533/8534 during its normal operation.