Met One Instruments AEROCET 531S, Руководство пользователя

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AEROCET 531S Manual Rev H Page 16
5.2.3. Sample Mode
The sample
MODE
controls single sample or continuous sampling as illustrated below.
Selection Description
MANUAL
The
MANUAL
setting configures the unit for a single sample.
AUTO
The
AUTO
setting configures the unit for continuous sampling.
5.2.4. Hold Time
The
HOLD
time is the time between samples when sampling in
AUTO
mode (continuous).
The
HOLD
time is user settable from 0
– 999 seconds. The pump will remain on during
the hold period if the
HOLD
time is 60 seconds or less. The pump will stop after each
sample, and start a few seconds before the next sample, if the
HOLD
time is greater
than 60 seconds.
HOLD
times greater than 60 seconds will increase pump life.
5.3. Settings Screen
Figure 12 shows the
SETTINGS
screen.
VOLUME CF
TEMPERATURE C
SENSITIVITY LOW
Figure 12
–
SETTINGS
Screen
5.3.1. Volume
The AEROCET 531S supports total counts (
TC
), particles per liter (
/L
), particles per
cubic foot (
CF
), and particles per cubic meter (
M3
). Particle count information updates
while the unit is sampling. Concentration values (
/L
,
CF
,
M3
) are time dependent so
these values may fluctuate early in the sample; however, after several seconds the
measurement will stabilize.
5.3.2. Temperature
The AEROCET 531S displays ambient temperature (AT) in Celsius (C) or Fahrenheit
(F).
5.3.3. Sensitivity
Select
HIGH
(0.3 µm) or
LOW
(0.5 µm) sensitivity. The default setting is
HIGH
. Use this
setting for normal operation. Use the Low setting for high concentrations (for example,
above 100 µg/m
3
) or when comparing measurements with older AEROCETS.