CXM HIGH-SPEED DIGITAL 3-AXIS FLUXGATE SENSOR ▼ ± 100 µT (± 1 Gauss) Full Scale Output ▼ Programmable Sample Rate 1/s to 200/s ▼ ± 3 nT of Noise Applications ▼ High-speed Magnetic Sensing ▼ Magnetic Anomaly Detection ▼ Guidance/Compassing CXM539 ▼ Laboratory Measurements ▼ Magnetic Field Mapping ▼ 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. ▼ 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. ▼ 44 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 ▼ 4145 n. first street ▼ 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 mA@ + 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 ▼ 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 ▼ fax: 408.324.4840 ▼ e-mail: [email protected] ▼ w e b : w w w. x b o w. c o m ▼ 45