Checking Sending/Receiving - Fuji Electric Time Delta-C FSV-2 Instruction Manual

6.5.6.2. Checking sending/receiving

Monitor the waveform, and check the status of received waveform.
a) Normal status
CH1 (SMP)
CH2 (SIG)
Forward direction
Transmitted/received waveform for
both forward and reverse directions
Magnified
CH2 (WID)
CH1 (SIG)
Transmitted waveform
Relationship between the received
waveform and the sampling window
Peak fluctuation
The received waveform controls the peak to be approximately 1.5Vp-p.
Reverse direction Forward direction
Sampling window
Time base fluctuation
Magnified view of signals
CH1 : 500mV/div
CH2 : 5V/div
Noise level
Point
1. Check that overall noise level is kept at 0.3
Vp-p or lower.
Forward direction:
Sends from the upstream of the
detector, and receives at the
downstream.
Reverse direction:
Reverse procedure of forward direction.
CH1 : 500mV/div
CH2 : 5V/div
Point
1. There is the received waveform
CH1 in front of the center of LOW.
2. The received waveform is approximately
0.75Vo-p.
Received waveform
Pipe inside echoic wave (generated only
in case of V method mounting).
In mounting by the Z method, there is no
echoic wave.
CH1 : 500mV/div
Point
1. Startup is kept within 3 to 6 waves.
2. The peak (amplitude) does not fluctuate.
If the peak fluctuates vertically, air may be
mixed in.
3. The time base must not fluctuate.
If it does, there may be influence by turbulent
flow or drift current.
-96-
for SMP of