RS232 COMMUNICATIONS
The Well Watch offers a standard serial communications port for connection to a
computer or remote device such as a SCADA system or remote readout. To connect to
a standard device such as a PC with a standard 9 pin D connector, only 3 wires are
necessary. The TX terminal on the well watch goes to pin 2 on the D connector, RX
goes to pin 3 and GND goes to pin 5. A simple serial to USB adapter is available from
Eno Scientific or most computer stores to use with laptops without serial ports. The
default serial configuration on the Well Watch is 19200 baud, 8 data bits, 1 stop bit, no
parity, and no flow control. These settings can be changed from the set screen on the
keypad.
The serial port is bi-directional and allows communication from the Well Watch to the
remote device and back. This allows the Well Watch to be programmed and operated
from a remote location. The Well Watch offers a complete command set over the serial
link to allow configuring the Well Watch settings. A standard terminal emulator
program such as HyperTerminal (included with windows) or Tera Term Pro (available
for free download from
http://www.logmett.com
) can be used from a computer to
operate the Well Watch remotely (see the section on remote operation).
The Well Watch can also be instructed to automatically transmit new data over the
serial port as it is generated. To activate this feature from the keypad, select RS232 on
the serial comm screen, then select continuous or depth only on the RS232 screen.
When set to continuous, the complete data set is transmitted with each pulse. When
set to depth only, only the depth is transmitted.
Eno Scientific Well Watch 700
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