18
Specifications
§５
Product
Handheld Particle Counter
Model
3888 (3-channel model)
3889 (6-channel model)
Particle
Measurement
Measuring
method
Light scattering
Size distribution
6 channels (0.3, 0.5, 1.0, 3.0, 5.0, 10.0
µ
m
）
3 channels (0.3, 0.5, 5.0
µ
m
）
Flow rate
0.1CFM (2.83L/min)
Accuracy:
±
5% (Compliant with JIS B9921 and
ISO21501-4
）
Sampling time
From 6 seconds to 99 minutes and 59 seconds
（
for 1 measurement cycle
）
Interval time
From 6 seconds to 99 minutes 59 seconds
（
Interval between the start and the next start of the repeat
measurements
）
Sampling cycle
From 1 to 999 cycles or continuous measurements
Location
classification
99 locations
Calibration
NIST traceable
Measuring mode Repeat, Single, Continuous, Calculation, ISO, GB
Display time of
measured value
From 1 to 10 seconds
Display of
measured value
Differential
Δ
and Cumulative
∑
Maximum
measurable
Concentration
2,000,000 particles/CF at 10% coincidence loss
（
compliant with JIS B9921 and ISO21501-4
）
Counting
efficiency
50
±
20%
（
for PSL particles near the minimum measurable
size
）
100
±
10%
（
for PSL particles of 1.5 to 2 times as large as the
minimum measurable size
）
（
Compliant with JIS B9921 and ISO21501-4
）
False count
≦
1 particle/5 minutes
（
Compliant with JIS B9921 and ISO21501-4
）
Size resolution
≦
15% (for PSL particles near 0.3
µ
m)
（
Compliant with JIS B9921 and ISO21501-4
）
Pump
Internal pump
（
Vane
）
Exhaust
With filter
Display
4.3 inch color LCD, Resistive touch panel
Summary of Contents for 3888
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