Model 1070

D a t a s h e e t

High Accuracy Analog Directional Sensor

F e a t u r e s• High accuracy ±0.1º for toolface (roll) and inclination,

±0.3º for azimuth when corrected using calibrationdata supplied

• High level analog outputs• Small size 1.360" OD by 22.7" long• Temperature compensated to 150°C

A p p l i c a t i o n s• Tensor Analog Drop-in Replacement• Orientation of borehole logging instruments• Directional drilling• Utility boring

D e s c r i p t i o nThe Model 1070 Directional Sensor is designed to enable high accuracy measurement of inclination and azimuth orientation angles, and toolface (roll), in borehole logging and drilling applica-tions. The unit is configured to be a direct replacement for Ten-sorTM analog directional sensors. The length of the sensor is 22.7”.

The Model 1070 sensor contains both a 3-axis fluxgate magne-tometer and a 3-axis accelerometer mounted in a single-piece rigid chassis. The combination of these two sensor systems enables the inclination and azimuth, and toolface angles of the Model 1070 reference frame to be determined. The toolface and inclination angles are calculated from the accelerometer sensor outputs. The magnetometer sensor outputs are used to calculate the system azimuth angle.

The Model 1070 sensor employs high performance magnetometer and accelerometer sensors, and a temperature sensor. To main-tain high accuracy over the temperature range of the system, the sensors are highly repeatable. This enables an accuracy of ±0.1° for toolface and inclination and an accuracy of ±0.3° for azimuth to be achieved over the full temperature range of the system when corrected using the calibration data supplied.

This calibration sheet included with each unit provides coefficients, commonly known as K-factors, for third-order temperature correc-tion for bias and scale factor, and first-order alignment and cross-axis sensitivity correction for each magnetometer and accelerome-ter axis.

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11/30/10

Figure 1. Model 1070 Directional Sensor

SpecificationsM

odel 1070 High Accuracy Analog Directional Sensor

1. Specifications

Angular Accuracy

Azimuth (latitude < ±55°) ±0.3º

Inclination (Drift) ±0.1º

Roll (Toolface) ±0.1º

Temperature Range

Operating 0 to 150ºC

Storage 0 to 185ºC

Power

Input Voltage Range +12VDC to +18VDC and -12 to -18 VDC, double-ended

Total Power Consumption 2 Watts

Physical

Size 1.360" (35mm) OD x 22.7" (577mm) L

Weight 2.0 lbs. (.9 kg)

Shock 1000G 1ms half sine wave

Vibration 20G rms, 50-250 Hz

Magnetometer Performance (uncorrected)

Dynamic range ± 1 Gauss

Linearity 0.01%

Bias uncompensated at 25°C 5 mGauss

Scale factor uncompensated at 25°C 4.5V/Gauss

Axis alignment uncompensated at 25°C ± 0.5°

Frequency response DC to 10 Hz

Temperature coefficients:BiasScale factor

< 2nT/°C (= <0.00002Gauss/°C)< 100 ppm/°C

Accelerometer Performance (uncorrected)

Dynamic range ± 3 Gee

Linearity 0.01%

Bias at 25°C < 5 mGee

Scale factor at 25°C 2V/Gee (typical)

Axis alignment at 25°C ±0.5°

Frequency response dc to 1 Hz

Output impedance < 1 ohm

Output noise < 100 μGee

Temperature coefficients:BiasScale factor

< 100 μGee/°C<100 ppm/°C

Connectors

Connector (top) MDM21PH003F (ITT Cannon)

Connector (bottom) MDM15SH003B (ITT Cannon)

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