1. For some instruments that do not need to be checked every day, they should be checked regularly at intervals. Periodic zero-point inspection. Since the pressure transmitter UPB1 has secondary valves, three-valve groups, and five-valve groups, the zero-point inspection is very convenient and does not require much time. However, the pressure transmitter used in the control system, no matter how short the inspection time, still needs to be changed to manual control, so the zero return cycle of this pressure instrument can be longer. Since these inspections require dismantling of the equipment, it is troublesome, so if there are no abnormalities, the inspection cycle can be appropriately longer.
2. Regularly drain, condense and vent the pressure transmitter.
3. Periodically purge the impulse tube which is easy to be blocked by the medium in the pressure transmitter, and fill the isolation liquid.
4. Periodically check the pressure transmitter parts. Make sure they are intact, without serious corrosion and damage; make sure the nameplate and logo are clear; the fasteners must not be loose, the connectors are in good contact, and the terminal wiring is firm.
5. Periodic check the line on-site, including whether the input and output circuits are intact; the line is disconnected, short-circuited, and whether the insulation is reliable. When the pressure transmitter is in operation, its housing must be well grounded. The pressure transmitter UPB2 used to protect the system should have measures to prevent power failure, short circuit, or open output. In winter, the insulation and heat tracing of the source pipeline of the instrument should be checked to avoid freezing damage to the source pipeline or the measuring element of the transmitter.