Marine Electronics Forum - Temp gauge calibration?
THE HULL TRUTH is the world's largest FREE network for the discussion of Boating & Fishing. Whether you're researching a new boat, or are a seasoned Captain, you'll find The Hull Truth Boating & Fishing Message Forum contains a wealth of information from Boaters and Sportfishermen around the world.
08-06-2012, 11:50 AM
I put in a Cruzpro Sea Temperature gauge a while back and calibrated it with a digital oven thermometer. Now I've got a new Garmin 4208 w/ temp from the new transducer and they're around 2° off. I don't know which one is right.
What's the best way to get an accurate sea temp for calibrating them both?
Thanks for any help.
08-06-2012, 12:55 PM
Here are Airmar's temp sensor temp vs resistance values :
But with boat in the water you can just check with a regular bulb thermometer or better yet, a cheap hardware store digital indoor/outdoor air temp gauge with a remote wired temp probe next to the seatemp sensor ... underwater.
But often more important than exact temp calibration when fishing is trend changes in temp for breaks rather than specific temp within 1 or 2 degrees, so the semi-small difference between 2 gauges is usually not too critical other than the psychological twist. Think of it as having 2 chances to be happy! "Love the one you like."