13
TEST METHODS
PCB-001-388
REVISION A (09/2017)
Method 2 - Tes4ng The PCB Fi9ed To A Coiler
1.
Ensure the PCB is accessible by removing any skid assemblies and then the camera.
2.
Turn on the CCU and make sure the link cable is connec ng the CCU to the Coiler.
3.
Check the PCB is rec12v, if it is not the PCB will not turn on.
4.
Ac vate the Sonde by selec ng 512Hz, 640Hz or 33kHz from the CCU Sonde menu.
5.
Check that the PCB is receiving the frequency selec on voltage (1v / 2v / 3.3v) - this value can
be measured from the ‘Bn’ pad.
6.
Take measurements from the oscilloscope test point indicated below, make sure the
measurements are taken for all frequencies to be sure the PCB is working correctly.
7.
Refer to ‘Expected Results’ pages for correct waveforms & the seMngs for the me base & V/
Div for each frequency.
See diagram for test points
Oscilloscope probe test point (J3)
Measure across the ‘R’ pad to check the Pcb is being
supplied with 12v using mul meter or oscilloscope.
If it is not 12v the PCB will not power up.
Measure the voltage on the ‘Bn’ pad with the Sonde
ac vated. The value will vary depending on the fre-
quency that is ac ve.
512Hz = 1v 640Hz = 2v
33kHz = 3.3v
PAGE 11
Equipment Required
Oscilloscope
Voltage Probe with 10X capability
