ASC Scientific D-2000 AF Demagnetizer

Owned by Former user (Deleted)
Last updated: Feb 08, 2024 by jr_roth
2 min read
[ 1.1 Exp 401 ] [ 1.2 Exp 398 ] [ 1.3 Exp 397P ] [ 2 Instrument Resources ]

Exp 401

Ambient Field measured (heading in port 54°).

 

 

Exp 398

Ambient Field

 

Ambient field measured with the Fluxgate Magnetometer during X398 BOX.

Exp 397P

Instrument check as part of KTLF

The D-tech AF demagnetizer is controlled by a laptop (PC) which was not changed during the expedition. Tie-up time allows instrument checking which is not routinely performed because a pmag instrument is pretty stable over time. A tuning coil check was conducted to verify if the selected AF value in the software actually corresponds to the AF applied by the instrument. A first check with the tuning coil suggests that the applied field is lower than the selected value in the software. A second check was performed later. Make sure that the tuning coil inside the D-tech is well located. Measurements vary a lot from one region of the D-tech to another.

Transfer function used: B (Oe) =  464.12 X  voltage (V)

 

 

First check (8/22/2022)

Second check (8/29/2022)

 

 

First check (8/22/2022)

Second check (8/29/2022)

AF value (Oe)

AF value (mT)

Voltage

Calculated

Voltage

Calculated

100

10

155.2 mV

72

229.6 mV

107

500

50

0.728 V

338

1.064 V

494

1000

100

1.440 V

668

2.104 V

976

2000

200

2.856 V

1325

4.24 V

1968

Tuning coil procedure was added in the Confluence page of the instrument. More details can be found in the vendor manual, available in the paper-based pmag instrument documentation.

 

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