Sutron Corporation X-Link Operations & Maintenance Manual, Rev 1.63 5/24/2016 pg. 110
8.9.1.
Hardware Interface
The Seametrics flow meter connects to X-Link's RS-485 interface.
External signal conditioning is required to connect a Seametrics flow meter to
X-Link . Refer to diagram below to wire a Seametrics meter to an X-Link.
Seametrics Pulse Wiring
Seametrics Serial Wiring
8.9.2.
Seametrics and SDI-12 sensors
Unlike most other sensors, X-Link is not able to ask Seametrics for data. Instead,
X-Link must wait and listen for the Seametrics flow meter to output data.
Seametrics flow meters will automatically output data. The data is output every
1.5 seconds when there is flow, and at a much slower rate when there is no flow.
When there is no flow, Seametrics will output data at a user-settable interval
called Logging Interval. Changing that setting requires interfacing directly to the
Seametrics unit; X-Link cannot change that setting.
X-Link's
Timeout
setting dictates how long, in seconds, X-Link should listen for
data from the Seametrics sensor. If no data is captured during this time, X-Link
will flag the measurement with an error.
X-Link
Timeout
setting should match the Seametrics' Logging Interval setting.
X-Link defaults
Timeout
to the longest value possible (980 seconds) to ensure it
will capture data from the Seametrics.
