BARTINGTON INSTRUMENTS
Page 33 of 82 OM0408/49
8.3. Operating Instructions
This sensor is designed for measuring the susceptibility of split cores. The following describes
the method of obtaining measurements by hand, both in the field and laboratory.
Note:
Automatic core logging systems are also available, together with data logging
software.
8.3.1. Connecting Up
Connect the MS2E sensor to the MS2 meter via the supplied TNC-TNC coaxial cable. Select the
desired operating range on the MS2 meter. After a 10 minute warm-up time, the sensor will be
ready to take measurements.
8.3.2. Taking Measurements
The sensor is zeroed to ‘air’ by pressing the 'Z' button. When the zero period is completed, gently
place the sensor against the surface to be measured and press the 'M' button.
Note:
During the zeroing period the sensor should be raised at least 2cm above the
measurement surface.
Prior to use, a measurement of the calibration sample should be made to ensure that the sensor
is working correctly.
8.3.3. Siting the Sensor
Choose a suitable site for the measurements.
Note:
Measurements of cores should only be performed on a non-conducting surface
such as a wooden bench. Although the sensor takes measurements only in the vicinity of
the probe surface, its very high sensitivity makes it susceptible to the influence of large
electrical conductors or magnetic materials at several centimetres from the probe.
Note:
As a precaution, take measurements at different points over the surface of the bench
and at different heights above it to check its suitability.
Note:
The sensor has good immunity to interference from external electromagnetic
sources. However, avoid operating it near to electrical machines, transformers etc.
8.3.4. Preparing the Core
Prepare a soft sediment core, suitably clad and stabilised in a suitable cradle, by covering it with
thin PVC film. The film will prevent contamination of the sensor measuring surface and therefore
prevent errors from this source. Kitchen film has a thickness of approximately 0.02mm and the
reduction of the scale factor due to this distance can be ignored. If a thicker film is used then
allowance should be made for the reduction in the scale factor. For example, at 0.05mm, values
must be multiplied by 1.04 to correct for this reduction.
