Programming ACTA ACTA 4000 User Guide
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4.4.2 Statistics torque, Statistics angle and Statistics pulse
These windows are also built up of a chain of windows. They display statistics on torque, angle or number
of pulses depending on which was chosen in the pull-up menu. Each statistical parameter is calculated on
all measured tightening operations saved during the measurement session for the specific tool. The right
and left arrows change statistical window as shown below. Press
Cancel to return to the measurement
dialog box.
The ISO 5393 statistics window is only present for ISO 5393 tools and only for torque
and angle.
If any parameter flashes it indicates that its result is outside the limits specified in
menu block Prog>Statistical setup
The
Statistics torque/angle/pulses window contains the following information, calculated on all tightening
operations in the tool.
Window Menu item Description
Statistics
torque/angle/pulses
No
Number of tightening operations.
Min
Min. torque/angle/no of pulses
Max
Max. torque/angle/no of pulses
X-bar
Mean torque/angle/no of pulses
R
Range of torque/angle/no of pulses
CR
CR Capability index for torque/angle/no of pulses
CM
CM Capability index for torque/angle/no of pulses
CMK
CMK (modified capability index) for torque/angle/no of pulses
σ
Standard deviation for torque/angle/no of pulses.
X-3σ
Negative confidence interval for torque/angle/no of pulses.
X+3σ
Positive confidence interval for torque/angle/no of pulses.
Var.
Variance for torque/angle/no of pulses.
Mean Diff
Mean difference in per cent between torque/angle/no of pulses
and controller torque/angle/no of pulses.
This window is present if at least one (1) subgroup exists.
Statistics
torque/angle/pulses
Subgroup statistics
torque/angle/pulses
ISO 5393 statistics
torque/angle
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