LevelMaster 7100 User manual 2105835 Rev AA | 4General specificationsTable 1 describes the LevelMaster general specifications.Table 1: General LevelMaster specificationsPowerSupply voltage 9-15 VdcCurrent 40 mA transmitting; 1 mA standbyPower cycling Available for optimal power managementEnvironmental/SafetyOperating temperatureNon-submerged -20 °F to 185 °F (-29 °C to +85 °C)Submerged floats 26 °F to 185 °F (-3 °C to +85 °C)CSA-approved for intrinsically safe operation Class 1, Div 1, Group D 4 level sensors max / barrierClass 1, Div 1, Group C and D 3 level sensors max / barrierMeasurementRange (depth) 2 - 25 feet (0.6 to 7.6 meters) in 1 foot (0.31 meters) incrementsRelative level accuracy + 0.1 inches (2.5 mm) Optional: + 0.05 inches (1.25 mm)Level resolution + 0.01 inches (0.25 mm)Level repeatability + 0.05 inches (1.25 mm)Temperature sensor accuracy + 1.8 °F (1.0 °C)Temperature sensor range 0 °F to 185 °F (-17.7 °C to 85 °C)Pressure Non-pressurized tanks: single or dual floatsNote: No SSTL, No high pressure supportedSingle surface float specific gravity (at 68 °F) 0.41 (3 inch diameter), 0.60 (2.85 inch diameter)Oil float specific gravity (at 68 °F) 0.47Water float specific gravity (at 68 °F) 0.91Emulsion float specific gravity (at 68 °F) 0.75Materials and dimensionsCasing material Fiberglass or stainless steel (pressurized tanks)Casing outer diameter 1.95 inches (48.5 mm)Float outer diameter 3.17 inches (80.5 mm) (2.85 inch single float on request)Reducer bushing and compression fitting Fits standard 3 and 4 inch (10.16 mm) tank portTemperature sensor location 12 inches (300 mm) from bottom of sensor (other locations possible)CommunicationsOutput Standard digital serial half duplex RS-485, ASCII protocolSpeed (baud rate) 1200, 9600, 19200 bpsLevelMaster componentsSensor assemblyThe LevelMaster measures both tank fluid level and fluid temperature. The sensor assembly or coil assembly consists of a rodwith wound conductive wire througout the length of the rod. The temperature sensor is installed on the rod as well. The coilassembly is an internal component and is installed inside the casing. The casing has the same length as the coil assembly. Aribbon cable and connector on the top of the coil assembly provide the connection to the electronics board.The sensor casing or tube is manufactured with different materials, depending on the corrosiveness of the fluid. These fluidsinclude, but are not limited to: culinary water, oils, solvents, or acids.
