Transcript
Mag612 Three-Axis Magnetic Field Sensor
Innovation in Magnetic Field Measuring Instruments
Mag612 Three-Axis Magnetic Field Sensor
Mag612U Three-Axis Magnetic Field Sensor The Mag612U is a two-part three-axis fluxgate sensor with a narrow noise specification and superior orthogonality. It consists of a compact, lightweight fluxgate probe and unpackaged electronics, connected by a cable up to 3 metres in length. The probe can be purchased separately, as the Mag612, by customers who wish to design their own electronics. This has broader specifications that include a noise specification of <20pTrms/√Hz at 1Hz. A schematic and sample room temperature drive electronics, packaged or unpackaged, can also be purchased to assist with the design.
Features • Measuring range ±90µT (probe with electronics) • Narrow noise specification: 10 to ≤20pTrms/√Hz at 1Hz at 25°C (probe with electronics) • Frequency range DC to 3kHz • Small probe size: 20 x 20 x 20mm • Two-part construction
Product Identification Product name Code
Item
Noise
Range
Mag612
U
Probe + unpackaged electronics
10 to ≤20pTrms/√Hz at 1Hz
±90µT
No code
Probe only
≤20pTrms/√Hz at 1Hz
Determined by electronics
-RTUDE
Room temperature unpackaged drive electronics
≤20pTrms/√Hz at 1Hz
±100µT
-RTPDE
Room temperature packaged drive electronics
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Mag612 Three-Axis Magnetic Field Sensor
Mag612U Specifications Performance Number of axes
Three (right hand XYZ co-ordinate system)
Measuring range
±90µT from DC to 3kHz
Measurement noise floor
10 to ≤20pTrms/√Hz at 1Hz at 25oC
Scaling
90µT/8V
Scaling temperature coefficient
<100ppm/oC
Start-up / settling time
99% of final value in 0.5s
Zero field offset
±300nT max. at 25°C
Offset temperature coefficient
<±1nT/oC
Scaling calibration error
±0.5% at 25°C
Orthogonality error between axes
<0.5°
Linearity error
0.0015% (least squares fit)
Frequency response
<5% amplitude error DC to 1kHz
Perming (magnetisation hysteresis)
<0.1% range for exposure to 10 x range unpowered
Frequency range
DC to 3kHz minimum within 3dB level
Alignment to datum face
<0.5°
Environmental Operating temperature range
-40ºC to +65ºC
Storage temperature range
-40ºC to +85ºC
Humidity (electronics)
Not protected: PCB assembly (conformal coating)
Mechanical (electronics only) Dimensions
30 x 90mm (3mm component height both sides excluding connectors)
Weight
12g ±1.5g
Output connector (P2)
Molex 53047-1210 (plus 8 solder pads for direct wiring)
Probe input connector (P1)
Molex 53047-1010 (plus 8 solder pads for direct wiring)
Electrical Positive supply voltage (range) Current drawn (max. mA) Over-voltage protection Reverse polarity protection Current limit Power supply noise rejection ratio
+11.0 to +15.5V 47mA max (46mA at zero field) None None Externally limited Ripple up to 50mV without any degradation of performance
Negative supply voltage (range) Current drawn (max. mA) Over-voltage protection Reverse polarity protection Current limit Power supply noise rejection ratio
-11.0 to -15.5V 11.0mA max (10mA at zero field) None None Externally limited Ripple up to 50mV without any degradation of performance
Output signals X, Y and Z axes Output type Output range Output impedance Maximum load capacitance (CLOAD) Over-voltage protection Reverse polarity protection Breakthrough
Unbalanced single output ±8V at full scale 10Ω nominal >1000pF without oscillation None None <50mV pk-pk at 16kHz
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Mag612 Three-Axis Magnetic Field Sensor
Mag612 Probe Specifications Performance Number of axes
Three (right hand XYZ co-ordinate system)
Measurement noise floor
<20pTrms/√Hz at 1Hz at 25°C
Scaling*
104μT/mA typical
Scaling temperature coefficient
<100ppm/oC
Start-up / settling time
99% of final value in 0.5s
Zero field offset
<±300nT max. at 25°C
Offset temperature coefficient
<±1nT/oC
Orthogonality error between axes
<3°
Frequency response
<5% amplitude error DC to 1kHz
Perming (magnetisation hysteresis)
<0.1% range for exposure to 10 x range unpowered
Frequency range
DC to 3kHz minimum within 3dB level
Alignment to datum face
<3°
* Value will depend on electronic drive and sense circuit.
Environmental Operating temperature range
-40ºC to +65ºC
Storage temperature range
-40ºC to +85ºC
IP rating (not including connector)
IP67 (1m)
Mechanical Dimensions excl. cable
20 x 20 x 20mm (±0.1mm)
Weight
70g ±7.5g (includes cable)
Connector & Cable Cable Probe only Supplied with Mag612-RTPDE Supplied with Mag612-RTUDE
3 metre tail (8 off 28AWG PVC wires + polyolefin insulation sleeve) Molex 51021-1000 Hirose RM15-TPD-10P(71) No connector (flying leads from cable)
Mounting points available
4 off mounting holes M2.5 Ø2.7 thru’ CSK to Ø5
Electrical Primary resistance
7.5Ω ±20%
Primary inductance
650µH ±20%
Secondary resistance
44.5Ω ±20%
Secondary inductance
5.1mH ±20%
Recommended excitation frequency
16kHz nominal
Mag612-RTUDE / -RTPDE Drive Electronics Specifications Performance Measuring range
±100µT from DC to 3kHz
Measurement noise floor
≤20pTrms/√Hz at 1Hz at 25oC
Environmental Operating temperature range
-40ºC to +70ºC
Storage temperature range
-40ºC to +85ºC
IP rating RTUDE RTPDE
Conformal coating IP64
Mechanical RTUDE
RTPDE
Dimensions
73 x 19.3mm + cable
114 x Ø26mm + cable
Weight (without probe)
100g
195g
Output connector + cable
Hirose RM15-TPD-10S(71) on a 1 metre long def stan cable
Input connector (to/from probe)
Solder pads
Hirose RM15-TRD-10S(71)
EMC approvals
None
None
Electrical Positive supply voltage (range) Current drawn (max. mA) Over-voltage protection Reverse polarity protection Current limit Power supply noise rejection ratio
+12.5V to +15.5V 38mA max (36.5mA at zero field) None Schottky diode Externally limited Ripple up to 50mV without any degradation of performance
Negative supply voltage (range) Current drawn (max. mA) Over-voltage protection Reverse polarity protection Current limit Power supply noise rejection ratio
-12.5V to -15.5V 12mA max (10mA at zero field) None Schottky diode Externally limited Ripple up to 50mV without any degradation of performance
Output signals X, Y and Z axes Output range Output impedance Maximum load capacitance (CLOAD) Breakthrough
±10V at full scale 100Ω nominal >1000pF without oscillation <50mV pk-pk at 16kHz
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DS3434/4
Bartington Instruments Limited,
T: +44 (0)1993 706565
5, 10 & 11 Thorney Leys Business Park,
F: +44 (0)1993 774813
Witney, Oxford, OX28 4GE, England.
E:
[email protected]
The specifications of the products described in this brochure are subject to change without prior notice. Bartington® is a registered trademark of Bartington Instruments Ltd.
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