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2.2.2 External Battery Power Option
The optional 110-WS-16PBU Battery Backup for the WS-16D consists of a 12V battery
and a float-type battery charger. The battery is used as the main power source, with the
float charger continuously keeping it at full charge. A fully-charged 12V 7AH battery will
run the WS-16 for three to four days, allowing the station to continue collecting and
logging data during a power outage. When power is restored, the charger will
automatically recharge the battery.
2.2.3 Main Memory Battery Backup
The WS-16-A’s main memory has a lithium battery backup so setup parameters, as
well as any stored data, will be retained even if the primary power source is interrupted.
2.3 RS232 Interface
The WS-16-A is an interactive device that not only outputs data but is capable of
responding to user commands. These commands are entered through the computer,
which also displays the current data and any additional data requested by the user.
Communication between the user and the WS-16-A is accomplished using RS232
communications protocol designed for short-distance use.
The standard 6-foot serial interface cable that connects the data acquisition module to
the computer is terminated with a 9-pin “D” connector. A 25-pin to 9-pin adapter may be
used, if required. The serial cable can be extended up to 200 feet, or more.
For computers without a serial port, a USB-to-Serial converter may be used. When
installing the converter, be sure to note the Com port number it is assigned.
Connect the serial interface cable between the data acquisition module and the
computer’s serial port (usually Com 1 or Com 2) or USB-to-Serial converter.
Certain communications parameters must be specified in the computer to enable the
two devices to communicate. Using a communications software program such as
HyperTerminal or ProComm, set them as follows:
Bits per second 9600
Data bits
8
Parity
None
Stop bits
1
Flow control
None
Emulation
ANSI
2.3.1 Testing the Connection
Once the WS-16-A is connected to the computer, the connection can be tested by
turning the “on/off” switch on the data acquisition module to the off position for several
seconds and then on again.
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