Aeris 500ai reading 300 psi low

Hi,

I own a Aeris 500 Ai that is reading about 300 psi low. I have another Aeris Ai that I exchanged (both have quick disconnects) and confirmed it was the computer. Is this something that is reasonable fixed or calibrated? I'm carrying a backup air gauge with me right now.
Here's another question. I'm in Cebu Philippines right now until next April. Aeirs doesn't seem too popular out here. Is there a local service center (I think I know the answer to that.)

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