How do I know EXACTLY how to adjust the large nut on the back part of my pressure control switch?

I just recently had my pressure control switch and bladder tank replaced in my outside well pump. The guys that installed them left before I realized it was not adjusted properly. It came on at 30psi, and was supposed to shut off at 50psi. However, it began short cycling after only being on for about 3-5 minutes. I turned the pump power off at the electric pole outside so I wouldn't burn up the motor! I've called the guys to come back out, but they're out of town (yeah, right!!) Anyway, Please don't tell me to call a professional plumber or well man, for I truly DO NOT have any money left. I babysit my grand daughter and desperately need water on. I'm trying my best to do it myself, as I don't have a man around to help me. Please anyone that may shed some light for me, in terms that I can understand, will be totally appreciated!!! Help!! and Thanks, Glojo18How do I know EXACTLY how to adjust the large nut on the back part of my pressure control switch?
If this pressure switch has 2 nuts on it one large and one small, The larger nut adjusts the cut in pressure and the smaller one adjusts the differential. So the cut out pressure is cut in minus differential. You adjust the large one clockwise to increase the cut in pressure and adjust the small one clockwise to increase the differential. You also have to make sure the bladder tank air pressure is the same as the cut out pressure you measure that with a standard tire pressure gauge and it can be pumped up with a compressor or a standard bicycle tire pump. This will be a properly adjusted pump.How do I know EXACTLY how to adjust the large nut on the back part of my pressure control switch?
Hold the long hose next to the smaller nut. Kinda jerk it back and forth, when it explodes the pressure will cease and the big nut will become smaller-