For neg density range measurement, meter the part of the negative being projected by the enlarger where there is the first amount of detail in the negative that you want to appear in the print as the area of shadow that is not all black. Set the log D time to 1, and this time move the paper sensitivity to null the meter.
Move the sensor to the area that you want the print to be not quite pure white. Then, without touching the sensitivity dial, see how much added log D time is needed on the tiemr dial to make the needle null. This usaully then measures te LogD denity range between the lightest and darkest print tones with detial. It can be used to compare against the ISO range rating of the paper to figure out what contrast range of the paper will be needed to suit the scale of the negative density, to reproduce the meters outcomes.
Change the sensitivity scale back to match that setting that matches the paper and then use the timer analyser as usual to establish the area with the first non white detial, with the right filtration in place, if using MG paper, and imake the print. It should be almost a perfect working print on the first exposure.
Areas where this method come undone are when using pyro negatives; the stain pyro gives does screw up the density range measurement.