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ZLS
Corporation Excellence in
Zero-Length Spring Gravity Meters |
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ZLS CORPORATION Offers 2 Metal,
The
Automated Burris Gravity Meter™ with
Introduction It took ZLS over 6 years to develop a new metal, zero-length spring land gravity meter. The Burris Gravity Meter™ is not a repackaging of old technology. It is a new meter designed especially to take advantage of the latest advances in digital technology. The result is a meter with superior digital performance and ease of use. It is the most precise, rugged and lightest gravity meter on the market. UltraGrav™ control electronics by Herb Valliant automate the Burris Gravity Meter™ allowing it to be used with microGal precision. Applications
The Burris Gravity Meter™ comes in a number of configuration to fit your budget and needs. UltraGrav™ allows the user to choose the level of precision needed for each application. Lower precision results in faster reading times, allowing more stations to be logged in a day. Higher precision allows the Burris Gravity Meter™ to be used for the most demanding microGal surveys. Whatever your application needs, you now have a choice with UltraGrav™.
Features Easy
for Beginners - Sophisticated for Experts Computer Controlled and Data Logging
A microprocessor-based automatic reading and data logging system, UltraGrav™ controls the meter for blunder-free observations. UltraGrav™ does all the work for you. It takes the reading, applies the calibration factor, corrects for earth tides and off level position*, then stores the data and displays the results, all in an instant! UltraGrav™ comes installed on a palmtop computer for flexibility in the field. The observer can remotely monitor and operate the meter via the standard wireless connection or a cable. Field proven, UltraGrav™ has been used successfully to upgrade existing Model G and D meters for over 14 years. UltraGrav™ is a comprehensive and mature system that eliminates costly transcription mistakes. ZLS Leveling System
The Burris Gravity Meter™ leveling system is fast and easy to use. It consists of three leveling legs which can be accessed from the top of the meter. The meter can be placed directly on the ground or on a base plate. Under normal field conditions, the Burris Gravity Meter™ can be precisely leveled for microGal readings within 30 seconds. However, precise leveling is no longer needed as UltraGrav™ can be configured by the operator to perform automatic off level corrections. Unlike bottom leveling systems where the meter is placed blindly into slots, the Burris Gravity Meter™ is easily placed on the ground or a base plate. With the ZLS manual leveling system there are no motors to reduce battery life or break down during a survey. The
Heart of The Burris Gravity Meter™
Small,
Portable and Weather Resistant Reliability ZLS Corporation has over a century of combined experience in the design and manufacture of metal, zero-length spring gravity meters. The UltraGrav™ control system by Herb Valliant has been used and proven in the field by leading universities and agencies around the world since 1994. The Burris Gravity Meter™ was developed by the world's most experienced designer of metal spring gravity meters, Larry Burris. Each Burris Gravity Meter™ is unconditionally warranted against any defects in parts or craftsmanship for a period of two years and carries a two year warranty against sticking of the mass on the stops. Burris Gravity Meter™ Models There are two models of the Burris Gravity Meter, 1) Non-Calibrated Screw Burris Gravity Meter and 2) Calibrated Screw Burris Gravity Meter. Both meters are identical in construction and have the same reading resolution of 0.001 mGal when reading the force balance. The Non-Calibrated Screw Meter does not have a calibrated micrometer screw. The meter is intended for users with short range surveys on flat areas and/or stationary site measurements requirements. The Non-Calibrated Meter’s screw cannot be used for gravity measurement, only to reset the force balance. The Calibrated Screw Meter has a calibrated micrometer screw. This meter is intended for users who routinely have surveys covering large geographic areas, mountainous regions or continental surveys. The Calibrated Screw Burris Gravity Meter
is calibrated every 50 mGals over the entire 7,000-mGal meter range. Readings
taken with UltraGrav™ are free of circular error when the dial is set to a
calibrated point. Calibration values are stable over time as they are determined
by a hardened micrometer screw. Non-Calibrated Burris Gravity Meter™
Calibrated Burris Gravity Meter™
Options Secular (Earth
Tide) Meter Training 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) Drift When New: Approximately 1.0 mgal per month When Mature: Less than 0.3 mgal UltraGrav ™ Control SystemType: 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: Palmtop Power: Power from gravity meter or internal batteries Standard Lithium Battery Life (at 25 C)Standby: 16 - 18 hr. Operating: 12 - 14 hr. Lithium 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) *Optional feature, level
calibration by operator required. Specifications are subject to
change without notice. |
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Contact the Following Representatives for More
Product Information Send mail to webmaster@zlscorp.com with questions or comments about this web site.
Site Last Updated April 2008
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