Met One Instruments AEROCET-380, Руководство по эксплуатации

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AEROCET-380 Operation Manual Rev A
4
Operation
The following sections cover the basic operation.
4.1 About the Measurement
The AEROCET-380 is a nephelometer which measures real-time airborne particulate
concentration levels using the principle of forward laser light scatter. The included isokinetic
probe enables the user to measure TSP (total suspended particulate) particles. Additional
cyclones can be obtained to measure PM
1
, PM
2.5
, or PM
10
particulate cut points.
4.2 Power Up
AEROCET-380 power is controlled by a switch located on the back of the unit. Press the
power switch to the on position (towards the top of the case) to power up the unit.
The first screen shown on power up is the Startup screen. This screen briefly displays the
company logo before loading the Operate Screen.
When the unit is started it first enters a Purge / Zero cycle where the purge pump is turned
on to purge the dirty particles from the engine then it does a Zero calibration. The unit will
then perform a span check if this is enabled in the Sample Setup before sampling begins.
When the unit is stopped, the purge pump runs again for 30 seconds to clean out the engine
before leaving it dormant.
4.3 Operate Screen
The Operate screen displays the sample status, date and time, battery status, sample data,
and location. Figure 4-1 shows the Operate screen.
2021-08-25 14:54:26
Aerocet 380
10
ug/m3
Status
Location
Running
ROOM 1
Figure 4-1 - AEROCET-380 Operate Screen
4.3.1 Sampling
The Operate Screen displays current sample information when the unit is sampling (real time
data). Concentration values (ug/m3, mg/m3) are time dependent so these values may
fluctuate early in the sample; however, after several seconds the measurement will stabilize.
The concentration units can be changed in the Sample Setup menu.