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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 51
NOZZLE/PUMP TEST MODE
NOZZLE:
7
Flow (STD): 16.7 LPM PUMP: ON
MOVE NOZZLE PUMP ON PUMP OFF EXIT
The PUMP Test screen
NOZZLE:
Nozzle status. UP ( ) or DOWN ( ).
PUMP:
Pump status. ON or OFF.
Flow (STD):
The air flow rate, displayed in EPA Standard liters/minute.
MOVE NOZZLE: This soft-key will move the nozzle up or down. The test allows for checking proper nozzle
movement. Total elapsed time is about 5 seconds. If the pump is ON this operation is disabled.
PUMP ON:
This soft-key will turn ON the vacuum pump. The nozzle will automatically be lowered if necessary.
PUMP OFF:
This soft-key will turn the pump OFF.
7.11
TAPE Test Menu
The TEST > TAPE menu allows the user to manually move the filter tape forwards or backwards in increments of
12.5mm “windows”. This is useful to test the tape transport mechanism or to move fresh spots of tape for other tests,
such as flow or count tests. The nozzle will be automatically raised if necessary, and the tape will take a couple of
seconds to move each window.
X:
This is the last number of windows moved. This number will be negative if the last move was
backwards.
FEED:
This is the number of windows you want to move. Use the arrow up/down keys to select up to 10
windows at a time.
FWD:
This soft-key will move the filter tape forward amount of the FEED value.
BKWD:
This soft-key will move the filter tape backward amount of the FEED value.
7.12
DAC Test Menu – Analog Output Test
The TEST > DAC screen is used to test the function of the analog concentration output voltage and the DAC (digital-to-
analog-converter) electronics. Use the up/down arrow keys to set the voltage anywhere from 0.000 to 1.000 volts in
0.100 increments. Measure the VOLT OUT +/- terminals on the back of the APDA-371 with a high quality voltmeter and
verify that the actual voltage matches the APDA display value within ±0.001 volts at each point. Then attach the
voltmeter to the input of your datalogger and repeat the test to verify that the correct voltages get to the input. If the
analog output does not match the value on the TEST > DAC screen, contact the Service department for instructions.
Note: 1 millivolt = 1 microgram of concentration in most applications. The DAC output cannot go negative.
7.13
CALIBRATE Test Menu
The TEST > CALIBRATE screen is used to perform tests of the reference membrane span check which occurs
automatically every sample cycle. This test can be run if the APDA-371 has been logging D errors. Each APDA-371 has
an individually weighed membrane, and this mass (m) is measured and displayed during this test. Compare the value
from this test with the ABS value on the calibration sheet for your unit. The values must match within 5%. If not, the
most common cause is a dirty membrane (dust or lubricant on the foil). The membrane can be carefully cleaned with