I saw my DG&L read 1/8" tight at MP 14.7 on the Larkin Sub right after a 34°F rain, while the mechanical gauge held steady at 56.5". Before I send it for calibration, has anyone else dealt with moisture ingress or temperature compensation drift that could undermine acceptance against Part 213?
, I’ve had a DG&L read 1/8" tight right after a 34°F rain; > 56.5" — I’d trust the stick and throw the DG&L in a sealed bag with fresh silica overnight, then re-zero at room temp before sending it for cal. Did you let it thermally soak 10–15 minutes at MP 14.7?
Before you ship it, check the battery-door gasket/vent and let the digital sit at ambient 10–15 min, then do a forward/reverse repeatability check against your 56.5" block — condensation can make the sensors read tight like fogged glasses. For Part 213 I’d use the mechanical and mark the electronic as “advisory”; @thompson0’s silica trick is solid — does it repeat after a warm-up pass?