Specification:

Calibration ranges
Min.: 0 to 0.5 mm +10 % (steel),
0 to 0.02” +10 % (steel)
Max.: 0 to 9,999 mm +10 % (steel),
0 to 390” +10 % (steel) within
the frequency range from 0.2
to 1 MHz / 0.5 to 4 MHz
0 to 1,420 mm +10% (steel),
0 to 56” +10 % (steel) within
the frequency range from 0.8
to 8 MHz / 2 to 20 MHz

Sound velocity
1,000 to 15,000 m/s, 40 to 600 inch/ms variable in steps of 1 m/s, 0.1 inch/ms and fixed programmed values

Display delay
From -10 to 1,000 mm, -0.3 to 40” (340 μs)

Probe delay
0 to 200 μs

Auto calibration
Measurement and setting of sound velocity and
probe delay using two known calibration echoes
(2-point calibration)

Pulse intensity
220 pF, 1 nF

Damping
50 ohms, 500 ohms (1,000 ohms in TR mode)

Pulse repetition frequency
4 to 1,000 Hz, variable in 10 steps

Frequency ranges (-3 dB)
0.2 to 1 MHz / 0.5 to 4 MHz / 0.8 to 8 MHz /
2 to 20 MHz

Gain
0 to 110 dB, variable in steps

Gain steps
0.5 / 1 / 2 / 6 / 12 dB (or user-adjustable),
step 0 is locked

Fine gain
4 dB, continuously variable in 40 steps

Rectification
Full-wave, negative and positive half-wave,
RF mode

Reject
Linear, 0 to 80 % screen height
Variable in steps of 1 %

Monitor gates
2 independent gates in color bar mode, start and
width variable over the entire calibration range,
response threshold of 10 to 90 % screen height
variable in steps of 1 % (coincidence and anti-coincidence),
alarm signal via LED and connectable
internal horn, Gate A switchable as interface gate
for Gate B, gate magnifier (zooming of gate range
over the entire display range)

Sound path measurement
Digital display of sound path (projection distance,
depth) between initial pulse and the first echo in
the gate, or between the echoes in the two gates,
measurement always at the intersection point
with the echo flank or echo peak

Measurement resolution
0.01 mm within a range up to 99.99 mm/
0.1 mm within a range from 100 to 999.9 mm/
1 mm above 1,000 mm,
0.001” within a range up to 9.999”/
0.01” above 10”
With evaluation in the frozen A-scan: 0.5 % of the
calibration range setting

Amplitude display
In % screen height
USM 35X DAC: additionally in dB above DAC or TCG
USM 35X S: additionally in dB above DGS curve
or ERS

Displayed reading
Sound path, (reduced) projection distance, depth,
amplitude for every gate, userconfigurable
at four positions of measurement
line and of the zoomed display in the A-scan

A-scan functions
Manual or automatic A-scan freeze,
A-scan comparison, echo dynamics
(envelope), peak echo storage

Color functions
Patented color-coded display of legs in angle
testing, adaptation of background color to the
light conditions of test environment, color display
of monitor gates and of registration curves (DAC,
TCG, DGS) for direct recognition, messages and
alarms in red characters