How do you replace the battery in the SMTD differential pressure gauge from Deleetech?

SMTD differential pressure gauge battery replacement procedure: First, loosen the four screws on the top cover of the instrument, remove the top cover, and unplug the battery connector to take out the old battery. Then, place the new battery in the battery compartment, connect the plug next to the new battery, and organise the supercapacitor wiring before placing it on the side. Finally, reinstall the top cover and tighten the screws, making sure they are secure to prevent water damage to the instrument. After completing these steps, the SMTD differential pressure gauge battery replacement process is fully finished.