Metrology Laboratory

Metrology Laboratory

Idronaut Metrology Laboratory is equipped with the following primary standards and equipments.

CT-01Plus Conductivity Temperature Standards

The “Conductivity-Temperature Transfer Standard CT-01Plus” is a compact and rugged instrument designed for the metrology laboratories to perform calibration of oceanographic CTD probes. It combines a Primary Standard 100 ohm RPRT (Reference Platinum Resistance Thermometer), a large-sized Idronaut self-flushing cell provided with seven internal rings of fused platinum in the quartz with a microprocessor controlled high resolution and high accuracy electronic amplifier.
Optionally, the CT-01Plus can become a redundant measuring system when equipped with two temperature and two conductivity sensors.
The high performance electronics collects and transmits the temperature and conductivity readings through the RS232C interface from 1 to 10 times per second. The functions of the CT-01Plus are managed by means of a simple communication protocol through the RS232C interface. A Windows interfacing and calibration management programme “ICAL”, which greatly simplifies the CTD probes calibrations, completes the CT-01Plus.

CT-01 Calibration SW

Calibration and management program that greatly simplifies and automates the calibration of conductivity, temperature and pressure sensors.
Interface up to 4 Idronaut OCEAN SEVEN 3xx CTD and the CT-01STD.

Calibration Bath

The Hart Scientific Model 7012 is a very precise constant temperature bath. An innovative state of the art solid-state temperature controller has been incor¬porated which maintains the bath temperature with extreme stability. The controller uses a microcontroller to execute the manifold operating functions. User interface is provided by the 8-digit LED display as well as by the four key-switches. Digital remote communication is optionally available with an RS-232C or IEEE-488 interface. The tank for the 7012 is in titanium and holds 36 litres. Two Hart Scientific 7012 units are present in the laboratory.

Guildline – 8410A Portasal

The Guildline 8410A Portasal® is a truly portable, high precision instrument from the world leader in salinometers. This all new instrument will deliver Salinity calculations on board ship with laboratory level confidence. The 8410A combines the latest in microprocessor technology with the time-tested measurement principles and reliability of the Guildline Autosal Laboratory Salinometer. It is housed in a compact, protected package that is easy to use while providing faster calculations and improved data logging capability. This portable salinometer measures accurate conductivity ratios and displays calculated salinity directly as well as measured parameters.

DH-Budenberg - 580 Dead Weight Tester

The DH-Budenberg 580 series of hydraulic dead-weight testers, are genuine primary standards, which guarantee fast and reliable pressure calibrations on a daily basis.

Fluke Calibration 1504 Thermometer Readouts

The 1504A Hart Scientific features accuracy up to ±0.002 °C . In addition, it reads 100-ohm, 25-ohm, and 10-ohm probes, has a resolution of 0.001 °C across its entire range, and is the smallest unit in its class.

Gallium Cell Maintenance System

The Model 9230 is a specialized instrument for the realization of the gallium melting point (29.7646°C). The instrument works with Hart’s Model 5943 stainless steel Ga cell to provide melting plateaus that can last a week (or longer). This instrument is intended for Calibration Laboratory use and not for field applications. Internal programming of the micro-processor controller provides preprogrammed scan rates, set-points for each step in the process, dwell timing, and indication that the next step is ready.

Gallium Melting Point Cell

The Hart Scientific Model 5943 Stainless Steel Gallium Cell holds a gallium sample that is 99.99999+% pure. The gallium is sealed in a Teflon envelope in a high purity argon atmosphere, which is itself sealed inside a stainless steel housing. This double-sealing method reduces leaching into the gallium sample and ensures a life of ten years or longer for the cell.

Triple Point of Water Maintenance Bath

The Hart Scientific Model 7312 is a floor standing constant temperature bath. This bath is useful in maintaining up to two triple point of water cells, performing temperature calibration, and other applications requiring stable temperatures. An innovative state of the art solid-state temperature controller has been incorporated which maintains the bath temperature with extreme stability. The temperature controller uses a micro controller to execute the many operating functions. Stability and uniformity are each better than ±0.005°C, so your cells stay usable for up to eight weeks. Whatever method you use for building your ice mantles, you can be assured they’ll last in a 7312 bath. An independent safety circuit protects your water cells from freezing and breaking by monitoring the temperature of the bath and shutting down its refrigeration system should the bath controller fail.

Triple Point of Water Cell

The Hart Scientific triple point of water cell consists of a cylindrical borosilicate glass container with a re-entrant tube which serves as a thermometer well. The design features a wide mouth at the opening for easier cell preparation. The bottom of the cell is fixed with a rubber bumper to cushion the cell in your dewar or bath holding fixture. The cells are thoroughly cleaned, filled with high purity gas-free water with the isotopic composition of sea water, and then sealed. The equilibrium temperature is realized at the ice-water interface surrounding the thermometer.