This Czerny-Turner monochromator was built from "Design and fabrication of a Czerny-Turner monochromator-cum-spectrograph" by
Murty, M.V.R.K.; Shukla, R.P.; Bhattacharya, S.S.; Krishnamurthy, G. (Bhabha Atomic Research Centre, Bombay (India). Spectroscopy Div.)
Bhabha Atomic Research Centre, Bombay (India)
1987
It can be found here: https://inis.iaea.org/collection/NCLCollectionStore/_Public/19/019/19019134.pdf
Example: Do a scan (scan parameter =1) from x_screw=20 to 103 mm. The calculated monitor "Wavelength(Ang) as a function of x_screw(mm)" will be a linear function. The monochromator functions properly.