Fisher FX 3 magnetometer

[nelson]

Hi
I have a Fisher FX 3 mag that i will like to ask if possible to add a mod to work also has a no movement detector.

Nelson

[ApBerg]

Hi
I have a Fisher FX 3 mag that i will like to ask if possible to add a mod to work also has a no movement detector.

Nelson

Hello Nelson,

Do you have a schematic from it ...and some photo's from the inside ?

Regards.

Ap

[nelson]

Hi ApBerg.
Nop i dont have the schematic and photos, but i can get them soon
Nelson

Hello Nelson,

Do you have a schematic from it ...and some photo's from the inside ?

Regards.

Ap

[Altra]

Hi,

The Fisher FX 3 mag cannot be used without motion. It is a induction magnetometer.
No matter what you do to the circuit it reguires motion.

You need a fluxgate magnetometer like the Schonstedt 52b

[Dave J.]

Hi
I have a Fisher FX 3 mag that i will like to ask if possible to add a mod to work also has a no movement detector.

Nelson

The FX3 is a differential induction magnetometer. It comprises two induction coils wired in series for gradiometric operation, going into a high gain DC amp, thence to a precision full wave rectifier, the output of which drives a VCO.

If you want it produce a static (no motion required) response, you'll need to add an integrator to the output of the DC amp, including a tweaker pot to adjust out offset-induced drift, and a momentary switch to zero the integrator. With an integrator you may get a lot more sensitivity in bench testing but no matter how hard you try to eliminate integrator drift it will still be a limiting factor.

--Dave J.

[Altra]

Hello Dave,

Can the FX3 pick up static magnetic fields without motion?

Best regards

[Dave J.]

No, the sensors are induction coils.

--Dave J.