Spectris PARTICLE MEASURING SYSTEMS Lasair Pro 310 - Delays; Sample by; Units; Data

5-3Lasair® Pro Aerosol Particle Counter Operations Manual
Chapter 5 : Sampling Options
Delays
Time in the format of HH:MM:SS can be added at the start or between samples.
• Purge: Initial delay before the start of sampling.
• Intersample: Delay between samples if Number of samples is greater than one.
Sample By
Sampling can be configured to stop aer a certain duration of time or aer a certain
volume of sampling medium (e.g., air) has been sampled.
• Time: If selected, the Lasair Pro will sample for a set period of time. Press inside
the field to adjust the sample time. The format is HH:MM:SS.
• Volume: If selected, the Lasair Pro will sample a set volume of sampling medium.
Press inside this field to adjust the sample volume. The unit of volume can be
changed just below this area of the screen.
Units
Normalized particle counts can have the following volume units:
• Cubic meters (m
3
)
• Cubic feet (
3
)
• Liters (l)
Data
Particle counts can be displayed as raw or normalized counts:
• Raw (N): Purely a numeric value of the particles counted by the sensor with no
associated volume.
• Normalized (N/m
3
or N/
3
or N/l): The number of particles counted by the sensor
within a unit of volume.