Campbell Scientific SR50-L CSC Ultrasonic Distance Sensor - Manual (Page 18)

SR50 Sonic Ranging Sensor
12
3.4 Two 21X Program Examples for Pulse Train Output
1 2 3 A
4 5 6 B
7 8 9 C
* 0 # D
I.D. DATA
21X MICROLOGGER
H L
1
H L
2
H L
3
H L
4
H L
5
H L
6
H L
7
H L
8
1 2 3 4 1 2 1 2 4 5 +12 3 6 1 2 3 4
EXCITATION CAO CONTROL PULSE INPUTS
SERIAL I O
MADE IN USA
S N 10800
6145, 6146, 6147
White
Green
Clear Black
Red
FIGURE 4. SR50 Wiring for 21X Pulse Example
The programming examples assume that the sensor is mounted 2 meters above the
ground and the desired output is snow depth in meters. In these examples a 21X
micrologger is used to read the SR50 with the pulse train option. The number of
pulses are counted on Pulse channel 1.
3.4.1 Pulse Train Programming Example 1
Example 1 will measure every execution interval.
* Table 1 Program
01: 10.0
Execution Interval (seconds)
The Execution Interval must be long enough to count all pulses
generated by the SR50.
The number of pulses is dependent on the SR50 jumper setting and distance to
target.
NOTE