OTT HydroMet SUTRON XLINK 100, Руководство по эксплуатации и техническому обслуживанию

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5.7 Connecting Tipping Bucket Rain Gauge
A tipping bucket rain gauge is supported via the TB/DIN#2 connection. This connection provides a pull-up
resistor (100K) to 3.3V to provide power for the contact switch in the rain gauge. Each time the bucket in
the rain gauge “tips” the internal switch closes momentarily causing a pulse on the TB/DIN#2 connection.
This pulse is counted and used to provide accumulated precipitation or precipitation rate data.
The key settings for a tipping bucket rain gauge are:

Measurement Type: Precip Accumulation or Precip Rate

Slope: 0.1mm, 0.2mm, 0.01inches or other value to match the calibration of the sensor.
Note: Measurement type: digital/counter1 or counter2 can also be used for tipping bucket rain gauges. Be
sure to select “debounce” for this measurement type as most tipping bucket rain gauge switches are noisy
and can produce multiple counts per tip if they are not de-bounced.
For more information, please see section 10.3.2-M
EASURE
T
YPE
: P
RECIP
A
CCUMULATION AND
P
RECIP
R
ATE
.
The typical connection of the tipping bucket rain gauge is shown below.
5.8 Connecting Pulse Sensors
Up to two sensors with pulse output are supported. The pulse output can come from a switch that is
momentarily closed (as in most flow meters and tipping buckets), or it can come from a device that