Operation Manual HORIBA APDA-371
Particulate Monitor
Date:
April, 2010
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HORIBA Europe GmbH, Julius-Kronenberg-Str. 9, D-42799 Leichlingen, Telefon: +49(0)2175-8978-0, Fax: +49(0)2175-8978-50
Page 35
Menu
Settings
CLOCK
Date and Time Settings.
SAMPLE
Range, Offset, Sample Time, Count Time, Conc. Units, Avg Period, Unit ID, and RS-232
settings.
CALIBRATE
Factory Calibration Values, (C
v
, Q
0
, ABS, sw, K, BKGD) Flow rate, Flow type, Heater type.
EXTRA1
Low concentration clamp, e1 – e4, Rarely used.
ERRORS
Analog error selections, Flow limits, Pressure drop limit.
PASSWORD
Password change screen.
INTERFACE
Cycle Mode early/standard, alarm relay polarity.
SENSOR
Meteorological sensor scaling and configuration screens, Channels 1 – 6.
HEATER
RH and Delta-T set-points for Smart Heater. Only visible if Heater Control is set to AUTO.
6.1
CLOCK Screen
The SETUP > CLOCK screen allows for the setting of the time and date. Time is a 24-hour clock only. Use the arrow
keys to select and increment/decrement the desired field, then press the SAVE soft-key. The APDA-371 clock may drift
as much as a minute or two per month. HORIBA recommends checking the clock monthly to ensure correct sample
timing.
6.2
SAMPLE Settings Screen – Critical Information
The SETUP > SAMPLE screen is used to set the APDA-371 sampling and averaging periods, and some other
important settings. Review each of these settings carefully. The SAMPLE screen is shown below. The fields can be
edited with the arrow keys, then saved with the SAVE soft-key.
The SAMPLE Screen
RS-232:
This allows you to set the baud rate of the RS-232 serial port. The available values are 300, 600, 1200,
2400, 4800, 9600, 19200, and 38400 baud. Default is 9600. “8N1” means 8 data bits, no parity, 1 stop bit. These
handshaking bits cannot be edited.
APDA SAMPLE:
This value sets the amount of time that the vacuum pump is on per cycle; the actual sample
period (see Section 4.1 for a description of the measurement cycle). The APDA SAMPLE time must be set in response
to the COUNT TIME value, since new versions of the APDA-371 allow the option of setting the count time to 4, 6, or 8
minutes. If the unit is used for PM
2.5
monitoring, the APDA SAMPLE must be set to 42 minutes with 8 minute count
time. PM
10
monitors are almost always set for 50 minutes.
Count Time
APDA Sample
Used for
4 min
50 min
PM10 monitoring
6 min
46 min
not used
8 min
42 min
PM2.5 monitoring
The APDA SAMPLE value can be set from 0-200 minutes for custom applications. If set for shorter period, such as 15
minutes, the unit will finish the sampling in 15 minutes and then wait until the end of the hour before beginning a new
APDA
SETUP SAMPLE
SAVE
EXIT
RS232 9600 8N1 BAM SAMPLE 042 MIN
STATION # 01 MET SAMPLE 60 MIN
RANGE 1.000 mg OFFSET -0.015 mg
CONC UNITS mg/m3 COUNT TIME 8 MIN