Geometrics MagArrow, Руководство пользователя

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10-20 Fair
This represents a low confidence level. Position measurements should be
discarded or used only to indicate a very rough estimate of the current
location.
>20 Poor
At this level, measurements are inaccurate by as much as 5 times the
accuracy rating of the GPS.
Heading Error:
This is the error in measurement caused when the angle of the magnetic field passing through the
optical package changes. There are several causes for this effect, the most obvious being magnetically
dirty particles. Keeping the instrument clean helps to prevent heading error. However, some heading
error is a natural result of the physics governing magnetometers.
Heater:
The small heater inside the sensor that heats the absorption cell, creating the atomic vapor necessary
for taking measurements. This length of time is the primary reason for the warm-up time.
Optical Package:
Commonly referred to as the physics package. The optical package contains the contents of the sensor
assembly, including the light source and laser diode.
Sensor Driver:
Commonly referred to as the "electronics", is all of the circuitry needed to convert the signal from the
optical package to produce the output of digital field readings.
Warm Up Time:
After powering on, the time it takes for the sensor to reach optimal temperature, which allows the
MFAM sensor to produce good quality field readings. The warm up time for the MFAM sensor is
approximately 10 minutes after powering on.