In this video we will show you how you can use Beamex ePG, electric pressure pump with any pressure calibrator to calibrate a pressure transmitter.
In order to calibrate a pressure transmitter, you obviously need to generate the input pressure. While working out in the field you often use a manual hand pump. But ePG can replace your hand pump and you can generate the pressure with a push of a button. Also, you obviously need a pressure calibrator in order to calibrate the transmitter.
In this video we use the Beamex MC6, but you can use any calibrator you may already have, even a non-Beamex one. The calibrator has to be able to measure pressure accurately and also to measure the milliamps and provide loop supply for the transmitter. But if you already have a Beamex MC6 family calibrator you can do this fully automatically.
Let’s quickly check the connections. The pressure generated by the ePG is connected to a three-legged pressure hose. The same pressure goes to our device under test, the transmitter and also to our pressure calibrator. For a two-wire transmitter we need a calibrator that provides loop supply, and measures the milliamps coming from the transmitter. So, let’s make the calibration.
The transmitter has a range of 0 to 5 bar (75 PSI) and the output current 4 to 20 mA. We will make a three point up calibration. When we start the calibration with the MC6 it will tell me the first calibration points that’s zero. So I will vent the pump and I will save the readings. I will see the pressure input on the top left corner and the milliamp signal on the top right corner. This part is the error graphics that start to build as we do the calibration.
Our next calibration point is 50%, 2.5 bar. I will use the coarse button first to go close to the set point. And then I will use the fine adjustment. When the readings are stable I can save them. The next set point is 5 bar, so I will go up. When the readings are stable I will save the point.
Now, the calibration is completed and we can see the results are passed. So, this is how you can use the Beamex ePG, electric pressure pump to replace your manual hand pump for pressure calibration.
In this video I used the arrow keys to control the pressure but if you have a MC6 family calibrator you can do this fully automatically. You can use the ePG with any pressure calibrator, even with the non-Beamex ones.