I want to test a couple of used shallow well pumps and would like a brief tutorial on the best method.
I have an amp meter, verified pressure gauge, electrical supply and an adequate water reservoir with supply/return plumbing. A ball valve is installed on the pump discharge side and a 30/50 pressure switch is installed. No pressure tank is plumbed into the test setup. Check/foot valve installed on suction side.
- I think I'm supposed to test amperage draw under load? Also, if using a clamp meter, L1 & L2 must be separated and either L1 or L2 clamped but not both.
- What kind of amperage should I be looking for? I realize this is motor/hp dependent, is there a basic guideline? During the amp test am I suppose to slowly close the discharge ball valve with the pump running and note the amp draw under pressure?
-For pressure diagnosis, do I record discharge pressure with the pump running and ball valve wide open then again with the pump off? After the pump is off how long should I time the pump under pressure to determine if there is a slow leak?
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