Pivot Analysis

Enter the required data below to calculate the Distribution Uniformity (DU) and precipitation of your center pivot system.

Name:
Site:
Date:
Time of Test (ex. 2:00 PM):
Elapsed Time (minutes)	(informational only)
Catchment Spacing (feet):	*
Distance to first catchment (feet):	* Must be multiple of catchment spacing.
Speed (%)	*
Span Length (feet):
Catchment Opening Area (sq. in.)	*
Volume Units:	Milliliters Ounces
* Required

Enter the volume data below. Span may be omitted but helps to locate samples. Note: 1 ounce is about 30 ml. Note: first catchment from the pivot is position #1

Span #	Position #	Volume
	1
	2
	3
	4
	5
	6
	7
	8
	9
	10
	11
	12
	13
	14
	15
	16
	17
	18
	19
	20
	21
	22
	23
	24
	25
	26
	27
	28
	29
	30
	31
	32
	33
	34
	35
	36
	37
	38
	39
	40
	41
	42
	43
	44
	45
	46
	47
	48
	49
	50
	51
	52
	53
	54
	55
	56
	57
	58
	59
	60
	61
	62
	63
	64

Comments: Enter comments relevant to the audit such as wind, make/model, system pressures,
flows, filter type/condition, general observations of the system condition, etc.

Tools on this site are intended for education purposes only and are not intended for commercial use. For more information contact Michael Spiess at California State University, Chico.

Center Pivot Analysis