Thermo Scientific MIE ADR-1500, Инструкция по эксплуатации

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Calibration and Particle Size Selection
Thermo Fisher Scientific MIE ADR-1500 Instruction Manual 4-3
If desired, the ADR-1500 can be calibrated gravimetrically for a particular
aerosol (dust, smoke, mist, etc.), other than SAE Fine, under field
conditions (actual conditions of use). To effect such calibration in the
particle environment of interest, proceed as indicated below:
●
Place the ADR-1500 within the particle environment.
●
Start a run.
●
After 1-minute, record the time weighted average (TWA).
●
Calculate the run time (t) necessary to collect at least 1 milligram of
sample using the following equation:
 
TWA
t
500

For example, if the 1-minute TWA = 2.5 mg/m
3
, the run time necessary to
collect approximately 1 mg of sample equals 200 minutes (i.e., t = 200
minutes).
Now that the run time (t) has been calculated from the above 1-minute
preliminary test, proceed with the following steps using the optional 37-
mm filter assembly:
●
Perform a tare weight on a fresh 37-mm filter using a microbalance
with at least a 0.001 mg resolution and place into the filter assembly.
●
Record the tare weight (m
1
).
●
Load the filter assembly into the ADR-1500 in place of the large
capacity HEPA filter.
●
Place the ADR-1500 within the particle environment of choice
●
Start a run using a 1-minute data logging.
●
Allow the ADR-1500 to run for the run time calculated from the
preliminary test (e.g., t = 200 minutes).
●
At the end of the run, record the TWA (mg/m
3
) run time t (minutes)
and flow rate (LPM).
●
Stop the run.
●
Recover the 37-mm filter assembly from the instrument and return to
the microbalance room for weighing.
●
Remove the 37-mm filter from the assembly, and weigh the filter after
equilibration and anti-static neutralization, as necessary.
How to Apply a
Correction Factor