Owner's manual

SR50A Sonic Ranging Sensor

'Subtract the corrected distance from the initial distance of the SR50A to the ground:

Snow_Depth=Initial_Distance - Dist_To_Snow

'Call Data Table and Store Data:

CallTable (Table1)

NextScan

EndProg

10.2.3 CR10X Example (SDI-12 “M3!”)

;{CR10X}

;

;In this example, the SR50AT is mounted 2.5 meters above the ground.

;

;The CR10X sends an SDI-12 command to the SR50AT, which outputs the

;temperature compensated distance value (Meters),

;the signal quality value and the temperature.

;

;Three input locations are used to store incoming data.

*Table 1 Program

01: 60 Execution Interval (seconds)

;Use SDI-12 command "M3!" to receive Distance, Signal Quality and Temperature

1: SDI-12 Recorder (P105)

1: 0 SDI-12 Address

2: 3 Start Measurement (aM3!)

3: 1 Port ;Use Ports 5-8 for CR23X

4: 3 Loc [ SR50ATDIS ]

5: 1.0 Multiplier

6: 0.0 Offset

;Set the initial distance from the SR50A to the ground in meters:

2: Z=F x 10^n (P30)

1: 2.5 F

2: 00 n, Exponent of 10

3: 2 Z Loc [ DisToGnd ]

;Subtract the Distance to the snow surface from the Distance to Ground

;to obtain snow depth

3: Z=X-Y (P35)

1: 2 X Loc [ DisToGnd ]

2: 3 Y Loc [ SR50ATDIS ]

3: 6 Z Loc [ SnowDepth ]

;Hourly Data Output

4: If time is (P92)

1: 0 Minutes (Seconds --) into a

2: 60 Interval (same units as above)

3: 10 Set Output Flag High (Flag 0)

5: Set Active Storage Area (P80)^27063

1: 1 Final Storage Area 1

2: 60 Array ID