I took scanning data with the following settings:

• The input of OMC-LSC_NORM is turned off
• The offset of OMC-LSC_NORM is set to 30 (in the calculation finally this value was corrected by the actual value at the peak)
• Dither amplitude is set to 300
• ISS is engaged

The scanning result is shown in the Figure1. With this timeseries data, I calculated the gradient of the error signal and got the calibration factor of 6.4(5)e9 [cnt/m]. This value is a bit larger than the value obtained by the transfer function measurement (5.1(4) e9 [cnt/m]), but seems consistent.