Probe FS40 Technical Data |
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 reading |
Based 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 factor |
Examples 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 reading
|
Edge 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 |
 |