34
Taking measurements
.
Summary
Taking a reading in the
S
CAN
mode (zero-read method) is a sim-
ple three step procedure:
1
Clear the memory so that no data are stored.
2
Press the R
IGHT
button while holding the sensor at least 30
cm from any magnetically susceptible bodies for a free-
space reading (i.e. zero the instrument).
3
Press the L
EFT
button to start the S
CAN
mode.
4
A pulsing audio tone indicates that the
S
CAN
mode is
active. Move the sensor slowly along the sample to mea-
sure.
1In the S
CAN
mode, the displayed data are not stored in
memory.
2 Beware of temperature dependent drift in S
CAN
mode!
Since only one measurement of the free-space frequency
is used for calculating all the susceptibilities, there is a
possibility that you may experience a gradual decrease in
the accuracy of the readings over a period of time. You
should occasionally stop and restart the S
CAN
mode.
3The S
CAN
mode is not suitable for precise measurements
of low susceptibility material.
34
Taking measurements
.
Summary
Taking a reading in the
S
CAN
mode (zero-read method) is a sim-
ple three step procedure:
1
Clear the memory so that no data are stored.
2
Press the R
IGHT
button while holding the sensor at least 30
cm from any magnetically susceptible bodies for a free-
space reading (i.e. zero the instrument).
3
Press the L
EFT
button to start the S
CAN
mode.
4
A pulsing audio tone indicates that the
S
CAN
mode is
active. Move the sensor slowly along the sample to mea-
sure.
1In the S
CAN
mode, the displayed data are not stored in
memory.
2 Beware of temperature dependent drift in S
CAN
mode!
Since only one measurement of the free-space frequency
is used for calculating all the susceptibilities, there is a
possibility that you may experience a gradual decrease in
the accuracy of the readings over a period of time. You
should occasionally stop and restart the S
CAN
mode.
3The S
CAN
mode is not suitable for precise measurements
of low susceptibility material.
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