John Scott wrote:
Our club has an EW Model D logger. In the process of getting things ready
for flying this year, I got the loggers out, put in fresh batteries, and did
a test run in the car. I got a strange altitude plot from the EW model D.
It was very "notchy'' with the altitude not changing for several samples,
and then jumping. This was true for both the pressure altitude from the
internal sensor and the GPS altitude from the Garmin.

I'd expect that. From the manual, page 11 section 1.1.4

Altitude resolution: -350m - 10,000m: 5 metre steps
10,000m - 15,000m: 10 metre steps

Looks to me as if your model D is working correctly.


--
martin@ | Martin Gregorie
gregorie. | Essex, UK
org |