Interval; Level Indication - Extech Instruments VPC260 User Manual

5
Test Settings Menu
Differential Mode (represented by the delta symbol Δ): Includes all particles
that are ≥ the selected particle size (2.5μm, 10μm, etc.) but < the next largest
particle size.
Concentration Mode (represented by the abbreviation 'CON'): This mode is
used to take a quick sample of airborne particulates of all sizes, especially in
areas where the particulate levels are unknown.

5.2.7 Interval

Set the time interval (1 to 100 seconds) between test cycles.
1. Scroll to the Interval selection in the menu.
2. Press ENTER to open the option.
3. Press ENTER to prepare the setting for editing.
4. Use the arrows to select the interval time from 1 to 100 seconds. Note that
the numbers wrap, so you can scroll down from '1' to '100' seconds, for
example.
5. Press ESC to save the setting.
Note: The Interval setting is used only for setting the time between consecu-
tive tests, not between individual measurements.

5.2.8 Level Indication

Designate the channel (2.5μm, 10μm, etc.) that will trigger the audible/visual
alarm when its particle count limit is exceeded. Note that only the particle
count for the designated channel is represented by the colour bar graph.
Refer to the table in Section 8, Particle Count Alarm, to see the particle count
range represented by each colour on the bar graph. Enable/Disable the alarm
in the Alarm setting (System settings menu).
1. Scroll to the Level Indication selection in the menu.
2. Press ENTER to open the option.
#NAS100084; r. AA/93064/93076; en-GB
13