I have a Winter 7 FMS 523 altimeter as a steam gauge backup on my panel.
The altimeter is consistently off by 200'. It turns out that adjusting an altimeter is relatively easy: There is a small screw near the main adjusting knob. One simply backs this out and then you can pull the main knob out to change the altitude without changing the value in the Kollsman window.
The altimeter is consistently off by 200'. It turns out that adjusting an altimeter is relatively easy: There is a small screw near the main adjusting knob. One simply backs this out and then you can pull the main knob out to change the altitude without changing the value in the Kollsman window.
Below shows that small screw on my altimeter. It was packed in grease (probably to mitigate it from falling out) but easily accessed with a jeweler's screwdriver.
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