GE Krautkramer USM 35X, Operator'S Manual

Page: 59 / 226

Krautkramer USM 35X Issue 01, 04/2005 5-11
Operation
Adjusting the pulser (function group PULS)
PRF-MOD(Pulse repetition frequency)
The pulse repetition frequency indicates the number of
times an initial pulse is triggered per second. You can
determine whether you need the highest possible PRF
value, or whether you are satisfied with a low value. You
have 10 steps available for the setting; step 1 means
the lowest PRF value.
The larger your workpiece, the smaller PRF values are
needed in order to avoid phantom echoes. In the case
of smaller PRF values, however, the A-scan update
rate becomes lower; for this reason, high values are
required if a workpiece should be scanned fast.
The best way to determine the suitable PRF value is by
experimenting: start from the highest step and reduce
the value until there are no more phantom echoes.
– Select the function PRF-MOD .
– Adjust the required value by means of the right-hand
rotary knob.
5.5 Adjusting the receiver
(function group RECV)
You will find all functions for the adjustment of the puls-
er in the function group
RECV .
– If required, go to the first operating level.
– Select the function group RECV .
H
Note:
Double assignment of the function FINE G/dBSTEP
(icon > ). Toggle between the two functions by repeated-
ly pressing the corresponding key .
Krautkramer USM 35X Issue 01, 04/2005 5-11
Operation
Adjusting the pulser (function group PULS)
PRF-MOD(Pulse repetition frequency)
The pulse repetition frequency indicates the number of
times an initial pulse is triggered per second. You can
determine whether you need the highest possible PRF
value, or whether you are satisfied with a low value. You
have 10 steps available for the setting; step 1 means
the lowest PRF value.
The larger your workpiece, the smaller PRF values are
needed in order to avoid phantom echoes. In the case
of smaller PRF values, however, the A-scan update
rate becomes lower; for this reason, high values are
required if a workpiece should be scanned fast.
The best way to determine the suitable PRF value is by
experimenting: start from the highest step and reduce
the value until there are no more phantom echoes.
– Select the function PRF-MOD .
– Adjust the required value by means of the right-hand
rotary knob.
5.5 Adjusting the receiver
(function group RECV)
You will find all functions for the adjustment of the puls-
er in the function group
RECV .
– If required, go to the first operating level.
– Select the function group RECV .
H
Note:
Double assignment of the function FINE G/dBSTEP
(icon > ). Toggle between the two functions by repeated-
ly pressing the corresponding key .