Extech Instruments VPC300 User Manual

9VPC300‐en‐GB_v1.55/15

LEVEL(ALARMLIMIT)INDICATION
Select the Alarm Limit (Level) of the corresponding particle size. When the selected particle
sizeisexceeded,theinstrumentalertstheuser.FromtheParticlesetupmenu,usetheUpand
DownarrowstoselectLevelIndication.PresstheEnter( ) buttontoentertheoption.Use
the arrow buttons to select the desired alarm limit and  then press ESC to save setting and
returntothemenu.
MemoryStorageBrowser
WhenthemeterisswitchedON,theseLCDiconsare
visible
.PressF1toenterthedatamemory
section.Therearethreeoptionsavailableinthememorymode,
Picture,Video,andParticleLogs.
UsethearrowbuttonstoselectoneandthenpressENTER(
) to
accesstheselection.
Whenbrowsingimages,data,andvideousethearrowbuttonsto
navigate,usetheEnterbuttontoselect,andusetheESCorF3
buttontoreturntothemenu.
PressESCagaintoexittothepower‐onscreen.



Extech Instruments VPC300 Specifications

Particle Counter

channels	0.3, 0.5, 1.0, 2.5, 5.0, 10μm
flow rate	0.1 ft³/min (2.83 L/min)
counting efficiency	50% at 0.3μm; 100% for particles > 0.45μm
coincidence loss	5% at 2, 000, 000 particles per ft³
particle count modes	Cumulative, Differential, and Concentration modes

Air Temperature and Relative Humidity Measurements

air temperature range	32 to 122°F (0 to 50°C)
dew point/wet bulb temperature range	32 to 122°F (0 to 50°C)
relative humidity range	0 to 100% RH
air temperature accuracy	±0.9°F (0.5°C) 50 to 104°F (10 to 40°C); ±1.8°F (1.0°C) all other ranges
dew point/wet bulb temperature accuracy	±0.9°F (0.5°C) 50 to 104°F (10 to 40°C); 1.8°F (1.0°C) all other ranges
relative humidity accuracy	±3% RH from 40 to 60% RH; ±3.5% RH from 20 to 40% RH and from 60 to 80% RH; ±5.0% RH from 0 to 20% RH and from 80 to 100% RH

General Specifications

display	2.8” 320 x 240 pixel TFT Color LCD with backlight
micro‐SD card slot	Accommodates up to an 8GB card
meter internal memory	5000 sample records; 74MB
power supply	Rechargeable 7.4V Lithium‐ion polymer battery
battery life	Approx. 4 hours of continuous use
battery charge time	2 hours approx. with AC adaptor/charger
operating temperature	32 to 122°F (0 to 50°C)
operating/storage humidity	10 to 90% RH non‐condensing
storage temperature	14 to 140°F (‐10 to 60°C)
dimensions	9.4 x 3.0 x 2.2” (240 x 75 x 57mm)
weight	1.26 lbs. (570g)

Summary

Operation

Power ON-OFF

Procedure to turn the instrument on and off using the power button.

Sequence of Operation

Basic Operation

Step-by-step guide to basic meter operation, including setup and starting tests.

Taking Measurements

Particle Counter Setup Mode

SAMPLE TIME (Test Cycle Time)

Setting the duration for each particle count test cycle.

START DELAY

Configuring the time delay before the test begins after pressing RUN/STOP.

CHANNEL DISPLAY

Selecting which particle size channels are displayed during measurements.

SAMPLE CYCLE

SAMPLE MODE

Choosing between Cumulative, Differential, or Concentration measurement modes.

INTERVAL (TIME BETWEEN REPEATED TEST CYCLES)

LEVEL (ALARM LIMIT) INDICATION

Setting alarm limits for specific particle size levels.

System Setup Parameters

DATE/TIME

Zero the Particle count Sensor

Battery Charging and Replacement

Specifications

Particle Counter

Technical specifications related to particle counting capabilities.

Air Temperature and Relative Humidity Measurements

General Specifications