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BAM. The cable has no polarity, so 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.
There are two pump types available for the BAM-1020. The Gast rotary vane pumps
are louder and draw considerably more power than the Medo linear piston pumps, but
have better vacuum capacity, especially at higher altitude or in 50 Hz applications. The
Medo pumps are smaller, quieter, and more efficient, but aren’t recommended for 50
Hz use.
12. Optional External Data Logger Connections: The BAM-1020 has an analog output
which may be recorded by a separate data logger if required. Connect the terminals on
the back of the BAM marked ”VOLT OUT +, -“ to the data logger with 2-conductor
shielded cable (not supplied). Polarity must be observed. The logger input must be
correctly scaled in order to log the voltage accurately! Information on configuring this
analog output is provided in Section 8 of this manual. A current loop output is also
available.
Newer data loggers often interface to the BAM-1020 using the digital serial ports for
better accuracy. Information about this is also found in Section 8. Met One can also
supply additional technical bulletins on the subject.
The BAM-1020 has a variety of other telemetry I/O relays, error relays, and serial data
connections located on the back of the unit as shown below. These items are
described in Section 8 and Section 9 of this manual.
BAM-1020-9800 REV K
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