Ranger 7000
®
Series Service Manual
51
Ohaus Corporation www.ohaus.com
TABLE 4-2: REPEATABILITY WORKSHEET
n
Reading
Delta = Reading – Mean
Delta x Delta
1
2
3
4
5
6
7
8
9
10
n = number of Reading
Mean = Sum of readings / 10
Delta = Reading – Mean
Standard Deviation = Square Root of (sum of (Delta x Delta) / 9)
5. Add the ten readings and divide the total by 10 to find the Mean (average).
Mean = (Reading 1 + Reading 2 + Reading 3 + Reading 4 + Reading 5+ Reading 6 + Reading
7+ Reading 8 + Reading 9 + Reading 10) / 10
Mean =________
6. Calculate the Delta for each reading and record in the work sheet.
Delta = Reading – Mean
7. Calculate the Delta x Delta for each reading and record in worksheet.
8. Add the ten Delta x Delta values and divide by 9
9. Calculate the Standard Deviation by applying the square root of the result from step 8.
Standard Deviation
=___________
Note: If the scale does not meet specifications, check environmental conditions, ensure that the
scale is level, and try again. If it still does not meet specifications, perform a service calibration,
and try again. (See Appendix B for Service Calibration).
Summary of Contents for Ranger 7000 R71MHD3
Page 1: ...Ranger 7000 Scale Service Manual...
Page 2: ......
Page 5: ...TABLE OF CONTENTS Ohaus Corporation www ohaus com iii Ranger 7000 Service Manual...
Page 11: ...Ranger 7000 Series Service Manual 9 Ohaus Corporation www ohaus com...
Page 30: ...Ohaus Corporation www ohaus com 28 Ranger 7000 Series Service Manual...
Page 58: ...Ohaus Corporation www ohaus com 56 Ranger 7000 Series Service Manual 5 1TERMINAL SPARE PARTS...
Page 77: ...Ohaus Corporation www ohaus com 75 Ranger 7000 Series Service Manual...
