TruePoint Compass Module HMR3500 The HMR3500 TruePoint compass module is a 3-axis digital compass solution with a customizable coordinate system for mounting in any desired orientation. Three Anisotropic Magneto-Resistive sensors and three MEMs accelerometers are combined to provide compass heading as well as pitch and roll angles. The HMR3500 has provisions for hard and soft-iron correction algorithms to handle magnetic distortion effects. In addition a World Magnetic Model feature is provided to automatically add declination angle corrections for reference to true north (geographic north). Honeywell provides product excellence and performance by introducing innovative solid-state magnetic sensor solutions. These are highly reliable, top performance products that are delivered when promised. Honeywells magnetic sensor products provide real solutions you can count on. FEATURES BENEFITS Precision Compass Accuracy Better Than 1 Nominal Heading Accuracy (1 ), 0.1 Resolution 4 4 Tilt-Compensated 89 Pitch and Roll, 360 Continuous Roll Capabilit y 4 4 Update Rate to 25Hz Rapid Heading Computations for Guidance Applications 4 4 Compact Solution in a 1.97 by 1.65 by Small Size for Tight Mounting Conditions, Minimal Layout Constraints 4 4 0.52 PCB Assembly Hard and Soft-Iron Compensation User Driven Calibration to Null Stray Fields. A Single Routine for Both 4 4 Routines Hard and Soft Iron Corrections World Magnetic Model Included Choice of True North or Magnetic North References 4 4 -40 to +85C Operating Temp Range Consumer and Industrial Environment Uses 4 4 +5 DC Supply Voltage Range Customizable to a Wide Variety of Power Sources 4 4 Light Weight 3.0 oz with Aluminum Housing, 0.6 oz PCB only 4 4 Customizable Coordinate System 24 Custom Coordinate Orientations 4 4 All Solid State Components Rugged for User-Defined Orientation Plane 4 4 HMR3500 SPECIFICATIONS Characteristics Conditions Min Typ Max Units Heading Accuracy (Clean Magnetic Environment) Level - 0.5 1 (1 ) Pitch 0 to 30 0.75 0.75 Roll 0 to 30 Resolution 0.1 deg Repeatability 3 sweeps, 0 to 360, level 0.2 deg Pitch and Roll Roll Range Default orientation, rotation about X-axis 180 deg Pitch Range Default orientation, rotation about Y-axis 80 deg Accuracy Roll 30, Pitch 30 0.5 1 deg 1 Null Accuracy Level 0.5 deg Resolution Level, 1-sigma, 100 readings 0.04 deg Roll Repeatability Roll 70 0.2 deg Pitch 70 0.2 Pitch Repeatability Roll 70 0.1 deg Pitch 70 0.1 Magnetic Field Range Maximum Magnetic Flux Density 0.7 gauss Resolution 1-sigma, 100 readings 0.45 milli-gauss Dip Angle Earths Vertical Field Component -70 +70 deg Linearity 0.2 %FS Electrical Input Voltage Standard Product 2.5 5.0 5.2 volts DC Power Input Voltage 2.5 to 5.2V 300 mW Digital Interface UART ASCII 4800 9600 38,400 Baud Update Rate Continuous Heading Updates 0.05 10 25 Hz Format Bi-directional binary packet data protocol. RS-232 - Physical Dimensions Circuit Board Assembly 1.97 x 1.65 inches x 0.52 Weight HMR3500 PCB only 0.6 ounce HMR3500 with case, no cable 3.0 ounces Connector 5-pin, 2mm pin spacing - Environment Temperature Operating -40 - +85 C Storage (OEM only) -55 - +125 C 1 Null zeroing prior to use of the HMR3500 and upon exposure to temperature excursions beyond the Operating Temperature limits is required to achieve highest performance. * Tested at 25C unless stated otherwise. 2 www.honeywell.com