High precision gravity machine BURRIS GRAVITY METER

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BURRIS GRAVITY METER TM

1. Functions: High precision gravitational measurement on land for basic geological investigation, mineral search and assessment.

2. Manufactured by: ZLS Corp, USA.

3. Year of production: 2004

4. Webiste: https://zlscorp.com/

5. Specifications

-Sensor Type: Metal Zero-Length Spring Hardened metal micrometer screw

-Range: 7,000 mGal

– Temperature range: -15 to +50 C

– Electronic Levels

Range: +/- 5 arc-minutes (10 arc-minutes total)

Resolution: One arc-second

–  Reading Resolution

Recorded: Standard

Version: Single reading mode: 0.001 mGal

Continuous reading mode (filtered): 0.0001 mGal

– Precision of Calibrated Points (Calibrated Screw Meters Only): Standard: +/- 0.015 mGal

– Data Repeatability (Under normal conditions of background noise) Within 50 mGal: 0.005 – 0.007 mGal (Feedback) Over 50 mGal: +/- 0.015 mGal (Screw)

Drift

+ When New: Approximately 1.0 mgal per month

+ When Mature: Less than 0.3 mgal

UltraGrav2™ Control System

– Type: Pulse width modulated electrostatic nulling system

– Feedback range: Approximately 50 mGal

– Input voltage: 10.5 to 14.0 volts DC

– Auxiliary outputs: Analog: levels, Beam and Feedback ( FM: Levels and Beam; PWM: Feedback)

Host Computer

– Type: Android Tablet

– GPS: Android Tablet (Accuracy will depend on the accuracy of the Android device being used) Power: Internal batteries

Battery

– Standard Lithium Ion Battery Life (at 25 C)

– Standby: 16 – 18 hr.

– Operating:12 – 14 hr.

– Lithium Ion Battery Charger/Eliminator

Input voltage: 85 – 270 Volts, 47 – 63 Hz Output voltage: 12.0 Volts

– Dimension: 6.87 x 4.87 x 2.87 in. (17.5 x 12.4 x 7.3 cm)

– Weight: 2 lb. (0.907 kg)

Burris Gravity Meter™ L X W X H: 10.5 x 7.0 x 11.5 in. (26.7 x 17.8 x 29.2 cm) Weight with battery: 13 lb. (5.9 kg)

6. Some project used this equipment by Geophysical Division.

– Project: Magnetic – gamma spectrum airborne survey at scale 1/50,000 and gravity measurement  at scale 1/100,000 in Phan Rang – Nha Trang area;

– Project: Magnetic-gravity airborne survey at scale 1/250,000 on the sea and islands  of Vietnam;

– Component project “Magnetic – gamma spectrum and gravity airborne survey  in the Northwest region” under the Project “General investigation of minerals and completing geological maps at scale 1:50,000 in the Northwest region for planning and sustainable development socio-economic”.

And many other projects.

                                                                                                                                             Source: Geophysical Division./.

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GEOPHYSICAL DIVISION

Website: https://geophysics.gov.vn/
Office address: No. 1 Alley 95 Chien Thang Street, Van Quan Ward, Ha Dong District, Hanoi City
Phone: 0243 8540448
Fax: 0243 8542223
Email: ldvldc@monre.gov.vn