Atlas Copco Power Focus 4000 - Page 103

Pset
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With P220 PVT monitoring selected, an acceptance window for the torque before P116 Rundown complete is
set. The P225 PVT max limit is monitored in real time during the P222 PVT monitor interval. The tool stops
immediately if this limit is exceeded. The P224 PVT min limit is evaluated against the monitor interval
average value at the end of the interval. Monitoring starts at cycle start or after selftap interval.
To reduce the effect of noise, the mean values are calculated from P223 No of PVT windows. A high
number of windows make the monitoring more sensitive; a low number filters more noise.
Graph illustrating PVT monitoring
1. P221 PVT delay interval
2. P222 PVT monitor interval
3. P224 PVT min limit
4. P225 PVT max limit
5. Acceptance window
6. P110 Cycle start
1.
2.
5.
4.
3.
Torque
Angle
6.