The zero settings for calibrating the Shanghai Jiuran adjustable film applicator differential head are as follows:
1. Put the adjustable preparer on a flat glass of suitable size, and adjust the scale of the micrometer head to zero.
2. Loosen the two hexagon socket screws that fix the differential head,
3. Naturally vertical, so that the end face of the scraper is in complete contact with the glass plate surface,
4. Tighten the 2 hexagon socket screws that fix the differential head.