CXM539 Datasheet

CXM
HIGH-SPEED DIGITAL 3-AXIS FLUXGATE SENSOR
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± 100 µT (± 1 Gauss) Full Scale
Output
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Programmable Sample Rate 1/s
to 200/s
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± 3 nT of Noise
Applications
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High-speed Magnetic Sensing
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Magnetic Anomaly Detection
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Guidance/Compassing
CXM539
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Laboratory Measurements
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Magnetic Field Mapping
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Materials Testing
The CXM539 is the first high-speed,
digital output, 3-axis fluxgate
magnetometer to be commercially
available. The system can convert
and transmit over its serial port all
three axes outputs at a rate up to
200 samples per second at 38400
baud. Sample rates and baud rates
are user-programmable.
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The CXM539 can be used in either a
command mode or auto send mode.
In the command mode, the CXM539
responds to commands to transmit
data issued by an external computer.
In the auto send mode, the CXM539
commences sending data as soon as
power is applied to the unit.
magnetometers
The CXM539 uses 3 separate 16-bit
sigma delta converters to achieve
high throughput. The scale factor is
set so that a full-scale input of 10-4 T
(1 Gauss) represents 32,768 counts
on the system A/D. The least count
represents about 3 nT. System noise
is 1 - 2 counts.
The CXM539 system is ideally suited
to situations where high-speed
magnetic data must be acquired
and analyzed. In the past, such
systems have normally used a
combination of an analog output
fluxgate and an A/D board in a PC.
The CXM539 simplifies and reduces
the cost of the magnetic data
acquisition system by eliminating
the cumbersome A/D board.
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The CXM539 is supplied with a standard RS-232 cable which allows for
easy connection to an external computer. A Windows™ compatible
configuration and data acquisition
and display program is supplied with
the CXM539. This program enables
the user to acquire and graphically
display data as well as configure the
CXM539 send rate, baud rate, output format, and other features.
In addition to the standard RS-232
interface, which is normally employed
when communicating with a PC, the
CXM539 is also equipped with a TTL
interface for communication with a
microprocessor.
Document Part Number: 6020-0016-01 Rev C
c r o s s b o w t e c h n o l o g y, i n c
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4145 n. first street
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san jose, ca 95134-2109
C
Specifications
CXM539
Performance
Accuracy (µT)
Noise (nT)
Range (µT)
Scale Stability (% FS/°C)
Initial Offset (nT)
Offset vs. Temperature (nT/°C)
Orthogonality of Axes (°)
Axes Alignment with Package (°)
Linearity (% full scale)
Maximum Data Transfer
A/D
Data Levels
Environment
Operating Temperature (°C)
Electrical
Power Input
Baud Rate (User Selectable)
Physical
Size
± 0.1 (± 1 mGauss)
± 3 (± 0.03 mGauss)
± 100 (± 1 g)
± 0.05
<± 200 (± 2 mGauss)
< 5 (< 0.05 mGauss/°C)
Better than ± 0.5
Better than ± 0.5
± 0.1
200 3-axis samples/sec @38,400 baud
3 16-bit Sigma Delta Converters
RS-232 and TTL
- 20 to + 70
100 [email protected] + 7.5 to + 15 VDC
300 to 72800
1.60” x 4.08” x 1.125”
(4 cm x 10.4 cm x 2.9 cm)
9-pin non-magnetic “D”
Connector
Specifications subject to change without notice
Pin
2
3
5
6
7
8
9
magnetometers
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Function
RS 232 out
RS 232 in
Ground
TTL serial out
TTL serial in
Configure
+7.5 to +15V DC
Pin Diagram
Ordering Information
Model
Description
CXM539
High-speed Digital 3-axis Fluxgate Sensor
Document Part Number: 6020-0016-01 Rev C
phone: 408.965.3300
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fax: 408.324.4840
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e-mail: [email protected]
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w e b : w w w. x b o w. c o m
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