Cygnus M5-C2P - 4 Selecting the Right Probe; Measuring Metals

M5-CYG2P-M-01_Iss6.doc
Cygnus 2+ Operating Manual
15
4. Selecting the Right Probe
The performance of any thickness gauge, and its ability to get a
reliable measurement depends on selecting the right ultrasonic
probe for the application and conditions. Cygnus gauges are
therefore offered with a selection of probes suitable for most
thickness gauging applications.
The following section helps you select the right probe for the
application.
The gauge must be set for the probe connected to it, see
Selecting the Probe Type on page 40.
Measuring Metals
Material Coating Corrosion Thickness
Recommended..
Probe
Measurement Mode
Steels
Any
Non to
Moderate
1 mm+
S5A
Multiple Echo
Steels
Any
Non to
Moderate
2 mm+
S3C
Multiple Echo
Steels
Any
Non to
Moderate
3 mm+
S2C
Multiple Echo
Steels
Any
Non to
Moderate
3 mm+
(0.12”+)
S2D
Multiple Echo
Steels
Non
Non to
Heavy
0.8 mm+
(0.03”+)
T7A
Single Echo
Steels
Non
Non to
Heavy
1.5 mm+
(0.06”+)
T5B
Single Echo
Cast
Iron
Non
Non to
Moderate
2.5 mm+
(0.1”+)
T2C
Single Echo
The table above shows that to be able to measure coated and un-
coated steels with non to heavy corrosion ideally you will require
at least two probes, in almost all applications this will be a S2C
probe and a T5B probe.
When measuring in Multiple Echo mode the coating will be
ignored and just the metal thickness measured.