Calibration Notes - Bartington MS2 Operation Manual

Correctly position the sensor, and if possible immobilise it on the bench using bench recesses.
Connect up, switch on, and allow a 10-15 minutes warm-up time before taking measurements.
If dual frequency measurements are to be performed on a batch of samples then they should all
be measured first at one frequency, then at the other. This avoids rapid switching between HF
and LF ranges with insufficient settling time between range selections.
6.8.1. Sample Insertion Procedures
To insert a sample, first raise the moving platen using the pillar on the top of the sensor. Position
the sample accurately within the recesses of the platen, and lower the sample into the sample
cavity to perform a measurement.
Note: When performing zero or blank measurements on the x0.1 sensitivity range, the
platen must be in the lowered (resting) position to eliminate the possibility of errors arising
from its diamagnetism.
6.8.2. Selecting the Measuring Range
Choose one or two samples from the batch to be measured and obtain, if possible, the typical
batch susceptibility value using the x1 range. If the value obtained is less than 20 then the
entire batch should be measured using the x0.1 measurement range on the MS2 meter. This is
particularly important if the coefficient of frequency dependency is of interest.
Note: When using the x0.1 range, the measurement procedures for drift cancellation that
are described in Taking Measurements
Note: Some highly susceptible samples may saturate the MS2 meter, which is designed
primarily for weakly magnetic sediments. However, excellent accuracy can be obtained
with this sensor by reducing the sample quantity and then applying volume or mass
corrections.

6.9. Calibration Notes

The sensor is calibrated using a cylindrical 10 ml sample of water where:
vol
c (H O) = -0.719 x 10
2
vol
c (H O) = -0.903 x 10
2
Note: Use only distilled, de-ionised water.
Note: Values obtained for other sample sizes will be in proportion to the sample volume.
BARTINGTON INSTRUMENTS
should be adopted.
CGS
-6
SI
-5
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