Particle Count Alarm - Extech Instruments VPC260 User Manual

8

Particle Count Alarm

The meter alerts you (visually and audibly) when the particle count limit, for
the designated channel, is exceeded.
Designate the channel that will control the alarm using the Level Indication
menu item, explained in step 2, below.
The animated colour bar graph shows the particle count status for the desig-
nated channel. Green indicates a normal condition, yellow indicates caution,
and red indicates a hazardous condition.
A yellow or red bell icon will flash and the beeper will sound when readings
are in the yellow or red region. Press RUN/STOP to abort a test and silence
the alarm.
1. Enable the alarm function in the Alarm menu item, in the System settings
menu.
2. Designate a channel (2.5μm, 10μm, etc.) using the Level Indication menu
item (Test settings menu). The designated channel controls the visual/
audible alarm and the colour bar graph's animated pointer.
3. The table below shows the particle count range for each bar graph colour,
for each channel.
Channel
0.3μm
0.5μm
1.0μm
2.5μm
5.0μm
10.0μm
Note that the range of particle sizes for each colour, in the table above, is
meant to be used as a guideline only, and is not derived from an industry
standard, or regulatory body.
#NAS100084; r. AA/93064/93076; en-GB
Green (good)
0 to 100,000
0 to 35,200
0 to 8,320
0 to 545
0 to 193
0 to 68
Yellow (caution)
100,001 to 250,000
35,201 to 87,500
8,321 to 20,800
546 to 1,362
194 to 483
69 to 170
Red (hazard)
250,001 to 500,000
87,501 to 175,000
20,801 to 41,600
1,363 to 2,724
484 to 966
171 to 340
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