Sutron Corporation X-Link Operations & Maintenance Manual, Rev 1.63 5/24/2016 pg. 18
3.
Measurements
A measurement is the process of collecting data from a sensor. X-Link provides
the ability to establish up to 16 measurements, each with its unique setup. Each
measurement will occur periodically and provide one or more results, which are
usually related to weather conditions.
Measurement results may be logged. The log can hold almost 250,000 unique
readings. Logged measurement results may be transmitted via cellular or
satellite modems.
3.1.
Sensors
As a data logger, one of X-Link's primary functions is to measure and log data
from sensors. All commonly used environmental sensors are supported.
Here is a list of some of the sensors supported and available through Sutron:
AT/RH
(Air temperature and relative humidity) - using analog or SDI-12
sensors
Precipitation
– using a tipping bucket
Wind Speed / Wind Direction
- RM Young or Gill ultrasonic via frequency,
analog, and SDI-12 inputs (includes vector averaging)
Stage
- using SDI-12 shaft encoder, radar level recorder, stage discharge
recorder, analog submersible, bubbler
Barometric Pressure
- using an SDI-12 Accubar or a built-in Accubar.
Solar Radiation
via differential analog input
3.2.
Inputs Available
Each of these inputs can have one sensor connected to it, except for SDI-12,
which can connect to several sensors.
Analog inputs
Two 0-5 V single ended analog inputs
Two differential analog Inputs (for bridge type sensors)
One 4-20mA input
Digital inputs
Two general purpose digital inputs that can be set up as
o
Counter digital input (e.g. tipping bucket)
o
Frequency/period input (e.g. wind speed)
