Small Size Quartz Accelerometer

ER-QA-03C:
1. Bias repeatability: 50μg;
2. Scale factor repeatability: 80ppm;
3. Class II non-linearity repeatability: 20-50μg/g².

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Introduction

ER-QA-03C Small Size Quartz Accelerometer

Introduction

ER-QA-03C Small Size Quartz Accelerometer is a smaller volume quartz accelerometer, not only it can used in inertial tests but also can be used in both static and dynamic acceleration measurements. In addition, the accelerometer uses a temperature sensor, which the operator can use to compensate bias and scale factor parameters to reduce the influence of temperature factors.

Applications in inertial navigation and guidance systems

Aircraft, ships, vehicles must have speed and position information, in the occasion of low requirements, people use air speedometer, Mach number sensor, odometer, etc. But with the improvement of the performance requirements, the above instruments can not meet the requirements. The linear accelerometer can be installed in the moving object to directly measure its acceleration, and then get the speed and position, the measurement accuracy is high, the dynamic performance is good, far better than the air speedometer, odometer. Therefore, linear accelerometer is one of the most important applications in inertial navigation guidance system.

Specifications

No	Parameters	ER-QA-03C1	ER-QA-03C2	ER-QA-03C3
1	Range	±60g	±60g	±60g
2	Threshold /Resolution	5μg	5μg	5μg
3	Bias	≤±5 mg	≤±5 mg	≤±5 mg
4	Scale factor	1.0±0.2 mA/g	1.0±0.2 mA/g	1.0±0.2 mA/g
5	Scale factor error	20%	20%	20%
6	Class II non-linearity	≤±20μg /g2	≤±30μg /g2	≤±50μg /g2
7	Bias repeatability	≤15 μg	≤50 μg	≤80 μg
8	Scale factor repeatability	≤15ppm	≤50 ppm	≤80ppm
9	Class II non-linearity repeatability	≤±20 μg /g2	≤±30 μg /g2	≤±50 μg /g2
10	Bias temp coefficient	≤±15 μg /℃	≤±50 μg /℃	≤±80 μg /℃
11	Scale factor temp coefficient	≤±15 ppm /℃	≤±80 ppm /℃	≤±100 ppm /℃
12	Noise	≤5mv	≤8.4mv	≤8.4mv
13	Natural Frequency	350~800 Hz	350~800 Hz	350~800 Hz
14	Bandwidth	800~2500 Hz	800~2500 Hz	800~2500 Hz
15	Vibration	10g(20-2000Hz)	10g(20-2000Hz)	10g(20-2000Hz)
16	Shock	150g, 0.5ms, 1/2sin
17	Operating temperature	-55~+85℃	-55~+85℃	-55~+85℃
18	Storage temperature	-60~+120℃	-60~+120℃	60~+120℃
19	Power	±12~±15V	±12~±15V	±12~±15V
20	Consume current	≤±20mA	≤±20mA	≤±20mA
21	Size	Ф18.2X23mm	Ф18.2X23mm	Ф18.2X23mm
22	Weight	≤30g	≤30g	≤30g

Install dimension

Quartz Accelerometer Dimension

The electrical interface relationship of the servo circuit is shown in Table 1. The terminal arrangement and description should comply with the requirements of Figure 1. The terminal arrangement is a bottom view (pins upward).

Dimension Of Accelerometer 02

Table 1 Servo circuit electrical interface relationship

Pinout Serial Number	symbol	Pin function	Pinout Serial Number	symbol	Pin function
1	M_L	Signal output terminal	6	T_se	PT1000 First End
2	M_H	Current test terminal	7	C_ext1	Differential capacitance detection terminal 1
3	V_-	Negative power supply terminal	8	C_ext2	Differential capacitance detection terminal 2
4	V₊	Positive power supply terminal	9	V_O-	PT1000 second terminal
5	GND	ground	10	V_O+	Regulator positive output(+9V)