Endress+Hauser MMP20 SONO Mobil HD2 Operating Instructions Manual page 29

MMP20 SONO Mobil HD2 (option E)
4. Take the measurement with the HD2 handheld device
5. Remove the probe from the sand and shake the sand to loosen it again
6. Repeat steps 2 to 4 two more times so that you have 3 measured values in total
7. Pour the sand into a second bucket so you can take readings from the sand at the bottom
(this is particularly relevant for gravel and if the sand is close to saturation as any
water can settle in the bottom of the container!)
8. Repeat steps 2 to 4 three more times so that you have 6 measured values in the end
9. Document the average of the 6 measurements
Endress+Hauser Page 29