Analysis and elimination of common faults of pressure transmitters

1. After the installation is completed, there is no display when the power is turned on:

Remove the signal cable plug from the transmitter, set the electrician's multimeter to the DC 25V or 50V gear, and check whether there is a DC voltage of about DC24V in the 1st and 2nd holes of the plug. If there is, screw the plug to re-test; if it is not normal, change the plug to another transmitter for a try, if it is normal, it can be judged that the pressure transmitter UPB13 is damaged. If there is no DC24V DC voltage in the above inspection, check whether the signal cable is open. If it is open, please replace it with a cable of the same specification or find the open point, connect the broken wire, handle the insulation and pay attention to protection.

2. The displayed data is obviously inconsistent with the actual value:

Remove the pressure transmitter UPB9 and check whether there are objects in the pressure tap that may distort the measurement. To remove objects, it is not allowed to use other sharp and hard objects to penetrate into the pressure measuring hole, so as not to damage the pressure measuring diaphragm.

The installation position of the transmitter is not suitable. There is eddy current or cavity at the pressure measurement position of the transmitter, which leads to distortion of the pressure measurement. Change the measurement position and stay away from the water inlet or outlet, the downpipe of the water pipe and other places where the pressure is prone to change.

For details, please contact Qi Huang