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Connecting the P-Trak Particle Counter to the Computer

Each P-Trak particle counter comes equipped with an RS-232

cable and a 25-pin to 9-pin serial cable adapter. One end of the

cable is a 25-pin D subminiature connector labeled COMPUTER;

the other end is an RJ-45 modular connector that connects with

the P-Trak communications port. Serial port connectors always

have pins (male) on the computer side.

1. Locate an available RS-232 serial port on your computer: for

example, COM1 or COM2.

2. If the port has a 9-pin connector, you do not need the

adapter. If the port has a 25-pin connector, plug the 9-pin end

of the adapter into the RS-232 cable.

3. Connect the RS-232 cable to the available serial port on

your computer.

4. Connect the RJ-45 connector to the P-Trak communications

port.

Setting up the Communications Port

To communicate with the P-Trak particle counter, the software

must be configured for the proper COM port. TrakPro software

can be manually set to operate on a specific COM port, or it can

automatically find a P-Trak particle counter that is attached to any

COM port. To set up the COM port, do the following:

1. Turn on the P-Trak particle counter.

2. Start TrakPro software.

3. Select Instrument Setup, Communications in TrakPro

software. The following dialog is displayed: