Sigmascope® SMP350 Electrical Conductivity Gauge
Article No. 10887
Fischer SMP350 Sigmascope w/ FS40 Probe
The Sigmascope® SMP350 Electrical Conductivity Gauge measures the electrical conductivity of nonferrous metals. This gauge makes it is easy and quick to determine the electrical conductivity with precision and accuracy.
Features
Measurement Principle - The SIGMASCOPE® SMP350 measures the electrical conductivity using the phase-sensitive eddy current method, which is approved by both DIN EN 2004-1 and ASTM E 1004 for determining conductivity. This kind of signal evaluation allows for contact-free determination of a substrate's electrical conductivity, even under paint or plastic coatings up to 500 µm thick. This method also minimizes the influence of surface roughness. Electrical conductivity is an important material property that provides information not only about a metal's ability to conduct electrical currents but also about its composition, micro structure and/or mechanical properties.
Windows™ CE operating system; large touchscreen with keyboard
Customizable user interface
Very simple calibration via user prompts
Simple management of measuring applications with user-definable file and folder structure
Memory for several thousand measuring applications and several thousand readings
Consideration of each material's conductivity-related temperature coefficient
Automatic measurement acquisition in free-running mode or with external start
Graphical presentation of specification limits
Extensive statistical evaluation of test series with date/time stamp as well as computation of Cp, Cpk and histogram presentation
Manual temperature input
Monitoring of temperature changes over time (?T/?t)
Calibration fine-tuning for instrument calibration with up to 4 standards
Acoustic signal for measurement acquisition and violation of specification limits; can be turned on/off
Various languages available
The corresponding probes are suited for different measurement frequencies. For automatic compensation of temperature influences on the measurement, the ambient or specimen temperature can be taken directly with the integrated (or optional external) temperature sensor.
Applications include:
Quality assurance and sorting of raw materials
Authenticating of coin alloys (e.g. specific conductivity of coins)
Assessing hardness and strength of heat-treated materials
Inspecting for heat damage, material fatigue and cracks
Estimating the phosphorous content in copper
Tracking precipitation processes, e.g. for Cu-Cr alloys
Testing the homogeneity of alloys
Scrap metal sorting
Technical Attributes
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Measurements Pursuant To: ASTM E 1004 and DIN EN 2004-1 Measurement Frequencies: Ranging from 15 kHz to 1 MHz depending on the probe Measurement Range: 0.5 - 65 MS/m or 1 - 112% IACS Measurement Precision: At ambient temperature: ±0.5% of reading Operating Temperature: 0 - 40°C / 32°F - 104°F Lift-off Compensation: To 500 µm Smallest Diameter Measurement Area Without Noticeable Influence on the Reading: 13 mm Connector for electrical conductivity probe, with or without integrated temperature sensor Connector for optional temperature sensor USB communication and printer port Power supply via battery or electric plug Probe FS40 Probe Design: Axial single tip probes with spring-loaded measuring system Applications: Determination the electrical conductivity of non-ferrous metals (NF) Measurement Range: 5... 108 %IACS Probe Frequency: 60 kHz, 120 kHz, 240 kHz & 480 kHz Trueness: Trueness 1...100 %IACS: ≤ 2 % of nominal value Based on Fischer factory calibration standards with +20°C (+68°F) material temperature Repeatability Precision: Depending on probe frequency
60 kHz: ≤ 0.10 %IACS of reading
120 kHz: ≤ 0.15 %IACS of reading
240 kHz: ≤ 0.20 %IACS of reading
480 kHz: ≤ 0.35 %IACS of readingBased on Fischer factory calibration standards, 5 single readings per standard, standard with +20°C material temperature Influences: Depending on material and used probe frequency - The following values are valid for a sufficient material thickness which depends on the used probe frequency Material Thickness Th: No measurement deviation within the trueness for Th ≥ Thmin Depending on the electrical conductivity of the material the minimal material thickness Thmin can be computed according to the following equation: 
f = Probe frequency in Hz
σ = Electrical conductivity of the material in %IACS
K ≈ 0.9, specific probe factorExamples Depending on probe frequency
460 kHz: ≤ 0.10 %IACS of reading
120 kHz: ≤ 0.15 %IACS of reading
240 kHz: ≤ 0.20 %IACS of reading
480 kHz: ≤ 0.35 %IACS of readingEdge Distance (R), Specification From Probe Tip Centre: For all probe frequencies- No measurement error within the trueness as of R ≥ 7 mm / 0.28" - Probe needs a minimum of R = 7 mm / 0.28" 
Measuring spot in the centre of the circular surface Edge Distance (X), Specification From Probe Tip Centre: For all probe frequencies - No measurement error within the trueness as of X ≥ 7 mm / 0.28" Measuring spot 
Curvature (R), measurement deviation from the nominal value with reference to master calibration on flat surface: For 60, 120, 240, 480 kHz
Compensation of curvature for R = 3...50 mm (0.12...1.97" ) by entering the diameter of curvature into the instrument No measurement error within the trueness as of R ≥ 50 mm / 1.97"Measurement with measurement prism (grip ring 2) from the scope of supply. Probe needs a minimum of R = 1 mm / 0.04" 
Distance Compensation (Measurement through a lacquer or plastic coating): Thickness of an air gab, plastic foil or lacquer coating. Distance compensated up to a thickness of 500 µm / 0.02" max. error: 1 % of reading Valid for measuring range - 0.5...108 %IACS Admissible Ambient Temperature at Operation: -10°C...+40°C / +14°F...+104°F Surface Temperature: max. +40≥C / +104°F Humidity Protection: No Probe Tip Material: Plastic Probe Tip Replaceable: No Measuring Method: Phase sensitive eddy current method Scope of Supply: Probe, measurement prism (grip ring 2), Cu standard approx. 100 %IACS Dimensions: Cable length: 1.5 m / 59.06", other cable lengths on request 
Delivery Content
Carry Case, Power Supply, Battery Set, Carrying strap, Protective cover for instrument, Cu Reference Standard, USB Cable, FS40 Probe