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Main Unit
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Recording Channels
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8 channels
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Recording Range
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360° in the horizontal plane
±80° in the vertical plane
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Output Data Rate
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Depending on the number of processed channels, user selectable:
- 8000 Hz (2 channels processed)
- 4000 Hz (4 channels processed)
- 2000 Hz (8 channels processed)
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Resolution
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< 0.0002°
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Noise
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Full Bandwidth:
< 0.0028° RMS, < 0.018° peak-peak (search coil orientation:
horizontal 180°,
vertical 0°)
< 0.0035° RMS, < 0.024° peak-peak (search coil orientation:
horizontal 180°,
vertical 40°) |
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200 Hz Bandwidth (internal low pass filter, 200 Hz Bessel 4th order):
< 0.0015° RMS, < 0.008° peak-peak (search coil orientation:
horizontal 180°,
vertical 0°)
< 0.0018° RMS, < 0.010° peak-peak (search coil orientation:
horizontal 180°,
vertical 40°) |
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50 Hz Bandwidth (internal low pass filter, 50 Hz Bessel 4th order):
< 0.0004° RMS, < 0.002° peak-peak (search coil orientation:
horizontal 180°,
vertical 0°)
< 0.0007° RMS, < 0.004° peak-peak (search coil orientation:
horizontal 180°,
vertical 40°) |
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Drift
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< 0.1° within 30 minutes after power-on (warm-up), negligible
after warm-up
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Linearity Error
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Horizontal ±0.3° max. within 360° range
Vertical ±0.3° max. within ±80° range
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Low Pass Filter
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Digital low pass filter with user selectable characteristics per channel:
- Disabled (bypassed)
- Bessel 4th order (IIR): 500 Hz, 200 Hz or 50 Hz
- Butterworth 4th order (IIR): 500 Hz, 200 Hz or 50 Hz
- Moving average (FIR): 8, 16 or 32 taps
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Front Panel
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| Field Signals: |
- Frequency X-Axis: 105.794 kHz (note 1)
- Frequency Y-Axis: 113.932 kHz (note 1)
- Frequency Z-Axis: 122.070 kHz (note 1)
- Nominal Output Voltage: Depends on the used
coil frame (note 2)
- Maximum Output Voltage: 52 Vpp differential
measured
- Output Impedance: 0.2 Ohm max. |
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| Preamplifier Interface: |
| - Power supply and data interface to the external preamplifier |
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| Analog Outputs: |
- 24 analog outputs, user selectable data
format
- Voltage Swing: ±2 V, ±2.5 V, ±4 V, ±4.5 V or ±5 V (user
selectable)
- Resolution: 14 Bit
- Output Impedance: 200 Ohm typical |
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| USB Interface: |
- USB 1.1 / 2.0 interface, bulk data
transfer
- Resolution of the transmitted output data: 21 Bit |
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| Mains Power Switch: |
| - System power on / off |
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| Display with Touch Screen: |
- 5" LCD with touch panel, 240 x 64
pixel
- User adjustable contrast and backlight
intensity
- Menu system to control the system configuration |
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Rear Panel
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Mains Power Input:
- 230 VAC ± 10 %, 50 Hz / 115 VAC ± 10 %, 60 Hz (250 VA max.)
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Outline Dimension
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255 x 110 x 310 mm (w x h x d)
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Weight
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6.5 kg
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Preamplifier
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Recording Channels
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8 channels, user adjustable gain setting per channel
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Input Impedance
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600 Ohm typical (100 kHz)
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Supply Voltage
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±5 VDC, ±300 mA max. (power supply is provided by the main unit)
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Outline Dimensions
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76 x 35 x 154 mm (w x h x d)
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Weight
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420 g
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Coil Frame
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In General
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Three coils with two turns each, arranged as a cube
Optional version “Removable Bars” available, which allows the
straightforward opening of the coil frame, e.g. to insert a primate
chair
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Magnetic Flux Density
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15 uT typical (note 3)
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Coil Material
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Anodized aluminum bars, cross section 8 mm
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Coil Color
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Various colors available, contact Primelec for further information
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Dimension
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Dimension L1 is freely definable within the
range from 250 mm to 700 mm,
the other dimensions (L2 to L5) are resultant |
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| L1 = |
250 ... 700 mm |
| L2 = |
L1 - 16 mm |
| L3 = |
L1 - 27 mm |
| L4 = |
L1 + 36 mm |
| L5 = |
L1 + 26 mm |
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Weight
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Depends on the coil dimensions,
for example approx. 5 kg for L1 = 700 mm
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Search Coils
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Material
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Preferably double insulated copper wire, Ø 20um
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DC-Resistance
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100 Ohm max. (note 4)
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Effective Area
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0.5 cm^2 ... 100 cm^2 (note 5)
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Weight
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Depends on material, dimensions and manufacturing process, for example approx. 2 mg for a double insulated copper coil with
a diameter of 2 mm and 80 turns
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Diagrams
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Typical
progression of the output voltage, horizontal plane (Note 6)
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Typical
progression of the output voltage, vertical plane (Note 6)
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Warm-Up drift
(Note 7)
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Linearity
Error and Crosstalk (Note 7)
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Distribution
of Angular Noise, based on 4000 Readings (Note 7)
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Note 1:
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Other frequencies for the field signals on request, contact Primelec for further information.
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Note 2:
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The nominal output voltage of each field signal is tuned at the factory to achieve the specified magnetic flux density and an optimal field homogeneity at the 3D-centre of the coil frame.
The tuned field signals may be attenuated by the operator in steps of
10 % down to zero.
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Note 3:
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The specified magnetic flux density refers to the nominal output voltage of the field signals.
The magnetic flux density may be reduced by the operator in steps of 10 % down to zero.
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Note 4:
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Higher DC resistance is applicable, possibly resulting in increased noise on the system’s output data.
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Note 5:
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Effective Area = n D^2 pi / 4 (where n is the number of turns and D
is the diameter).
Smaller effective
area is applicable, possibly resulting in increased noise on the
system’s output data. Larger effective area (up to 1000 cm²) is
applicable by reducing the magnetic flux density.
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Note 6:
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Output Mode: Angular Data, Output Swing: ±5 Volt
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Note 7:
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Used setup for the performance measurements:
- Coil frame L1 = 700 mm
- Search coil effective area = 10.8 cm², DC resistance = 4.8 Ohm
- Angular data acquired over the USB interface
- 8 channels processed
- Gain correction disabled
- Offset correction disabled
- Field signals magnitude = 100 %
- Preamplifier gain setting = 17
- Low pass filter disabled
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Overview
Download
Product Brochure (PDF, 561 kB)
