First, for your Passap, you really need to make a gauge for a garment if you want it to fit. The yarn color varies so even if you use the same yarn it can stick up another seam quantity when knitting this time.
Second, the size of your readings was always consistent. I recommend 30 stitches X 30 rows so choose -30 + 30 when programming your Passap. You can make a larger color binder and use it for a charity item, because you cannot use the same yarn again to knit the garment because the yarn sticks out and looks different when you iron the second time. The pass creates a unique shrinkage in the yarn, so if you try to use the yarn again with yarn that you have not knitted on, it will immediately appear and change the finished seam. You stroke it, color it, breed it and hold it again so that the shrinkage is in the whole garment or knit.
If you have a very unstable fabric or yarn, then you want to make a gauge that is twice as normal in size in addition to the size 100 × 100.
What is unstable fabric? Well, stockinette and Passap birdseye fairisle are very stable (if you do not stick socks on a very large amount of seams with weights to get many loose stitches). Passap Fisherman's Rib is one of the most unstable.
The larger the cloth cloth, the more it will usually grow from gravity, especially if it is in my case a dress. The length of the dress can cause the yarn to extend from the weight it wears or hangs on a hanger. You can catch the tendency of the yarn to stretch if you make a gauge and send it through the same process as you would when you need to clean it after you wear it.
A longer length can change the meter. Some yarns can be (50 stitches can measure 8 inches, but 100 stitches can measure 20 inches). You will want to monitor what happens when you come in genuine garments to make sure your meter is correct.