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./.
