SOMMER SPA - Actual Snow Depth Adjustment; Measurement Interval Configuration

User Manual SPA Snow Pack Analyser
- 15 -
Adjustment
The following geometric parameters are necessary:
• Sensor length: Length of the sensor from one box to the other.
• Roll height: Plumb line height of the top of the roll and the ground
• Foot height: Plumb line height of the middle of the sensor at the lower box and the ground
• Brace length: Distance between the middle of the roll and the sensor at the upper top box.
• Ground length: Distance on the ground between plumb line of roll and plumb line of sensor foot.
For horizontal sensors the roll height and the foot height have to be equal. The brace length is set to “0”
and the ground length is equal to the sensor length.
The geometric parameters are measured with a measuring tape and should be of about 1 cm accuracy.
The geometric parameters are entered into
Main menu 

 Sensor_01
Main menu 

 Sensor_02
Main menu 

 Sensor_03
Main menu 

 Sensor_04
5.4. Actual Snow depth
The snow depth measurement offset has to be adjusted in the control unit IASP by entering the actual
value in Main menu 

 6 Analog input 

 7 Snow depth adjustment
A test measurement of the snow depth is performed with Main menu 

 6 Analog input 

 Snow depth
5.5. Measurement interval
The minimum recommended interval is 5 minutes (= 300 s) ( Main menu 

 2 Meas. interval )
Attention:
If the interval is adjusted to a lower value eventually temporary problems in
the meausurement process can occur.
The adjusted default interval is 10 minutes.