Do not adjust the hardware. First make sure that your processor is set correctly. Dev temperature at 35C and dev time at 30 sec. Output from your Harlequin rip a monochome exposure sweep ( found under 'Output' - 'Print calibration) with a range of 50 to 150 in steps of 10. Now measure the processed result to find the lowest test exposure with a reading in the 100% step of approximately Density 4.00.
Enter this exposure value in your pagesetups under 'exposure', this will automatically send the value to the imagesetter everytime you expose film.
You can now fine tune your calibration with a further 'uncalibrated' test to obtain the correct dot %.