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 15
2.6
Electrical Connections
Each APDA-371 is factory configured to run on either 120 or 230 volt AC power. Your shelter must be wired for power
to run the APDA, the pump, and any other AC powered devices such as computers, data loggers, other instruments,
etc. A good earth-ground connection point near the APDA unit is highly recommended. Have a qualified electrical
contractor provide power according to all local codes. After the APDA unit is installed and power is provided, connect
the electrical accessories as follows. Refer to the diagram below.
1.
APDA-371 Power: Plug the APDA-371 into the AC power mains with the provided power cord. Note: There are
two fuses located inside the APDA power switch module, which can be accessed by prying open the small cover
surrounding the switch. The power cord must be removed in order to open the cover.
HORIBA recommends plugging the APDA-371 unit into a battery back-up UPS (uninterruptible power supply) since
even a momentary power outage will reset the APDA and stop an entire hour’s worth of data collection. A small
computer-style UPS of 300 Watts or greater is usually sufficient. The vacuum pump usually does not need to be
connected to the UPS as the APDA can compensate for short pump power outages. If the pump is to be backed up as
well, then a much larger UPS is required.
2.
Chassis Ground: Connect one of the terminals marked “CHASSIS” on the back of the APDA to a ground point
as close as possible to the instrument. Use the green/yellow ground wire supplied with the unit. A ground rod is
recommended, but a cold water pipe, or junction box safety ground are other possible connection points. Note: the
APDA-371 also uses the standard safety ground line inside the power cord.
3.
Pump Connection: Decide on a location to place the air pump. The best location is often on the floor under the
rack or bench, but it may be up to 25 feet away if desired. Route the air tubing from the pump to the back of the APDA
unit, inserting it firmly into the compression fittings on both ends. The tubing should be cut to the proper length and the
excess saved for replacements. The pump is supplied with a 2-wire signal cable which the APDA uses to turn the pump
on and off. Connect this cable to the terminals on the back of the APDA marked “PUMP CONTROL” The end of the
cable with the square black ferrite filter goes to the APDA, but the polarity of the wires is not important. Either the red or
black wire can go to either terminal. Connect the other end of the cable to the two terminals on the pump.
4.
Temperature/Pressure Sensor: The BX-596 or BX-592 temperature sensor should already be installed onto
the inlet tube, and the sensor cable routed to the APDA-371. Connect the cable to the terminals on the back of the
APDA as follows:
BX-596 AT/BP Sensor
Wire Color
Terminal Name
Yellow
Channel 6 SIG
Black/Shield
Channel 6 COM
Red
Channel 6 POWER
Green
Channel 6 ID
White
Channel 7 SIG
BX-592 AT Sensor
Wire Color
Terminal Name
Yellow or
White
Channel 6 SIG
Black/Shield
Channel 6 COM
Red
Channel 6 POWER
Green
Channel 6 ID
Additional HORIBA BX-500 series sensors may be connected to APDA channels 1 through 5 to log various other
meteorological parameters. Details on these sensor connections are given in Section 10.2 of this manual.
5.
Smart Heater: There are two possible versions of the BX-827/830 Smart Heater electrical connection. If the
Smart Heater kit was supplied with a gray relay module (units built after May, 2008 as shown below), then plug the relay
module into the mating control connector on the back of the APDA, and connect the Smart Heater to the green
connector on the top of the relay module. The relay module has its own power cord to supply power to the heater. Note:
The connector on the back of the APDA has been changed to prevent connecting the heater directly to the APDA.
