User manual for LEMI-029 digital fluxgate sensor system with KMS820 USER MANUAL. for LEMI 029 DIGITAL FLUXGATE SENSOR SYSTEM

Transcription

1 USER MANUAL ORIGINATED BY: REVISION DATE: DOCUMENT NUMBER: J. Jiang Nov 29 th, SUBJECT: User manual for LEMI-029 digital fluxgate sensor system with KMS820 REVISION: 2.0 USER MANUAL for LEMI 029 DIGITAL FLUXGATE SENSOR SYSTEM Rev. ECO Description By Date Approved 2.0 N/A Original Issue Ying Liu 29 NOV2010 JOHN JIANG KMS TECHNOLOGIES PROPRIETARY This information is proprietary of KMS Technologies and is not to be distributed in derogation of KMS Technologies property right.

2 User Manual REV. 1.0 Page 2 of 7 TABLE OF CONTENTS 1.0 INTRODUCTION PRODUCT DESCRIPTION APPLICATION DESCRIPTION FIGURES SPECIFICATIONS WARRANTY COPYRIGHT STATEMENT. 7

3 User Manual REV. 1.0 Page 3 of INTRODUCTION Thank you for choosing the LEMI-029 digital fluxgate sensor system. This manual provides detailed descriptions, specifications and operating instructions of the system. The system consists of two parts, the LEMI-029 fluxgate magnetometer and the digital fluxgate board. Now LEMI-029 is fully integrated with KMS-820 acquisition unit. The power and timing are completely provided from KMS-820 to LEMI-029 through one cable so that LEMI-029 is synchronized with KMS-820 analog channels and GPS. With this combination, KMS-820 and LEMI-029 can work together as a MT station for low frequencies. Also, coil magnetometers can be connected to KMS-820 at the same time duration acquisition for higher frequencies. Figure 1: LEMI-029 fluxgate 2.0 PRODUCT DESCRIPTION The LEMI-029 fluxgate magnetometer is based on three orthogonal fluxgate sensor elements combined with low noise excitation and registration electronics, automatic digital static field compensation and exceptional three channel 32 bit digitization. The system can be controlled and operated USB or UART interfaces. Optional external timing signals allow for precise time synchronization of multiple LEMI-029 and enable the use of this sensor in distributed sensor networks. In addition to the magnetic measurements the LEMI-029 senses three components of static acceleration to enable the calculation of its orientation and of Euler angles. This feature makes the LEMI-029 particularly useful in applications where the placement of the sensor cannot be controlled by the user. 3.0 APPLICATION DESCRIPTION LEMI-029 fluxgate magnetometers are used for measurements of magnetic fields in the frequency range from DC to 180 Hz. Their wide bandwidth and low noise make them the ideal sensor for a wide variety of applications. The sensor can be placed in any orientation. The axis of orientation is show in figure 2.

4 User Manual REV. 1.0 Page 4 of 7 PRODUCT HIGHLIGHTS Low noise (6 pt/ 1 Hz) Exceptional low-frequency stability Static field compensation 32 bit ADC USB and UART output Timing, synchronization of multiple units 4.0 FIGURES X Y Z Figure 2: LEMI-029 dimensional and orientation drawing

5 User Manual REV. 1.0 Page 5 of 7 Figure 3: LEMI-029 fluxgate board and sensor Figure 4: LEMI-029 unit integrated for KMS-820 acquisition unit

6 User Manual REV. 1.0 Page 6 of SPECIFICATION Sensor elements 3 orthogonal elements Length 62 mm (sensor) Width 38 mm (sensor) Height 38 mm (sensor) Weight 85 g (sensor) Sensor assembly Screw mount Frequency range DC to 180 Hz 3 db points of frequency band 180 Hz Total dynamic range ± 78,000 nt Dynamic range after compensation ± 5,400 nt Noise 1 Hz 6 pt/ Hz Compensation Digital feedback ADC output 3 channels, 24 bit Digital output USB, UART Construction material Syntactic foam Power consumption 425 mw Power supply voltage ± 5 V & V Temperature rating 0 C to 70 C Shock resistance 100 G, 3.5 ms Vibration resistance 4.8 G rms Auxiliary sensors 3-component acceleration, temperature, pressure

7 User Manual REV. 1.0 Page 7 of WARRANTY The term of warranty is 12 months after delivery if all requirements of the present instruction including precautions and warnings are adhered to. During this term the manufacturer is liable to repair the defects occurred through no fault of the consumer or force majeure, or if not possible, to change the device by other equivalent specimen. 7.0 COPYRIGHT STATEMENT Copyright 2012 by KJT Enterprises Inc. All rights reserved. This user manual may be downloaded for personal use. Reproduction, redistributing, or reselling any material from this user manual in either machine-readable form or any other form without the permission of KJT Enterprises Inc. is strictly forbidden. For permissions and other copyright-related questions please direct in writing/ to KMS Technologies KJT Enterprises Inc Richmond Ave, Suite 610 Houston, TX USA Kurt@kmstechnologies.com