Scales would be as follows
40-130A range (each step is 10 Amps)
1 - 40A
2 - 50A
3 - 60A
4 - 70A
5 - 80A
6 - 90A
7 - 100A
8 - 110A
9 - 120A
10 - 130A

60-160A range (each step is 11.11 Amps)
1 - 60.0A
2 - 71.1A
3 - 82.2A
4 - 93.3A
5 - 104.4A
6 - 115.5A
7 - 126.6A
8 - 137.7A
9 - 148.8A
10- 160.0A

80-225A range (each step is 16.11 Amps)
1 - 80.0A
2 - 96.1A
3 - 112.2A
4 - 128.3A
5 - 144.4A
6 - 160.5A
7 - 176.6A
8 - 192.7A
9 - 208.8A
10 - 225.0A

100-250A range (each step is 16.66 Amps)
1 - 100A
2 - 116.6A
3 - 133.3A
4 - 150.0A
5 - 166.6A
6 - 183.3A
7 - 200.0A
8 - 216.6A
9 - 233.3A
10- 250.0A

Not having one in front of me this would only be the case if the knob only goes down to 1 and stops and up to 10 and stops. If it goes below 1 like to a 0 value or higher than 10, then I would need to recalculate the steps.