Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: How do you tell how much pressure is building and when it reaches the correct amount
Document: A proven design since about the year 1921. If you want to put in the ingredients and then ignor until completed, then the newer all electronic units would be a better choice. Using this unit while setting a timer and making sure that the correct amount of water is used before sealing the lid and having the heat adjusted to the correct setting works excellent for a medium to large size family.This is an excellent product.
I have used my pressure cooker once and can tell I will be doing much more cooking with it. I prepared goat meat and didn't want to spend hours cooking it and it turned out so tender and moist. I am very pleased with this product.
When cooking with this, make sure after you hear it whistle, turn down your heat to a low medium to a medium!!!.. All you want is a soft whistle. It's compared to having a roll boil and a boiling water; it's just a waste of energy. Violent whistling means, too much pressure is building up, not good coz, the food can only take a certain pressure to still be recognizable, and the pot can only take so much pressure.
As long as you read the instructions and respect the pressure it is a pretty easy way to cook with excellent tasty results in a quick amount of time. Granted it has only been a couple of weeks but we have eaten out much less these 2 weeks. We picked up a well regarded cookbook on AmazonPressure Perfect: Two Hour Taste in Twenty Minutes Using Your Pressure Cookerand so far so good.
Slight assembly is needed to put the handles on. You need a phillips screw driver. The pressure cooker is well made and well worth the price. The 4 quart pressure cooker is perfect for two people. You need to adjust the liquid amount for the food items you prepare. It was suggested that one use a cup of water when cooking squash but that was too much, so you need to make adjustments. So far I cooked some root veggies and soaked beans and was real happy with the results.
Solid stainless steel. Don't have to worry about this pot falling apart. Great price and fast shipping. Only problem would be the nose but it only last a min or so when the pressure is first building.
the ONLY thing you have to worry about is knocking over the weighted pressure release and allowing steam to fly up.It does make some noise but I like it, it allows me to hear from afar if the heat setting is correct. I find the size of the cooker to work well for 3-4 adults.
I've been using this Pressure Cooker for nearly 2 months now. It works perfectly. As long as the lid is aligned with the small triangle on the lid lining up with the corresponding triangle on the lower handle the lid is VERY EASY to settle into place and twist into the correct locking position.
The quality of this Pressure Cooker is poor. I bought it, used it once and returned it immediately. You can tell that it is made in China.
I bought this for my mom, i use it sometimes so i can tell you this product is easy to use, no fancy features but it gets the job done.There are rules for using a pressure cooker once they're followed you'll find this to be a great purchase.
Answer: The rocker on the top starts moving when the pot is up to the right pressure. Watch it for a few minutes to be sure it's not rocking too hard. Then let it go for the exact cooking time called for.