BARTINGTON INSTRUMENTS
Page 12 of 20 OM0382/9
4.5. Analogue Output
Analogue output frequency response for the Mag-01 and Mag-01H is shown in figure 7 below.
Figure 7. Mag-01H Analogue Output Frequency Response
The Mag-01 is primarily intended for the long term precise investigation of static or slowly
varying, low intensity magnetic fields. The frequency response of the instrument is tailored to
remove noise from high frequency sources. The output frequency response is slew rate limited
and a screened connecting cable is recommended with the screen grounded at one end only.
When using the analogue output, the full scale range will, for the low field probes, exceed the
±
2V
range monitored by the LCD and will be
±
5V full scale. Due to the internal resistance of the high
field probes the analogue output voltage can only be considered linear with respect to the magnetic
field up to
±
4.5V.
For the cryogenic probe type F the measuring range on the analogue output is
±
0.2mT.
5. The Probes
5.1. Introduction to the Probes
The range of probes for low field and high field are described in the product brochure.
The probes B-G are of dual core fluxgate design. A pair of high permeability cores are driven in
and out of saturation by an AC signal applied to the two excitation coils. A third pick-up coil is
1
2
3
4
5
6
7
8 9
2
3
4
5
6
7
8 9
2
3
4
5
6
7
8 9
10
100
0.01
0.1
1
10
100
2
3
4
5
6
7
8
2
3
4
5
6
7
8
2
3
4
5
6
7
8
2
3
4
5
6
7
8
9
9
B Peak (
µ
T)
measured at
Va out
(LOW FIELD PROBES)
B x 10 FOR HIGH FIELD PROBES
ROLL OFF: -40dB/DECADE
-12dB/OCTAVE
