Polytec PDV-100, Руководство пользователя

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5-5
5 Operating the PDV
6. Generate the 2.80 V test signal by then pressing the key SET several
times until the following display appears.
The 2.80 V test signal with approximate full scale is only emitted while
this display is shown. This signal is there to check the calibration of the
analog signal voltage output.
7. Exit service mode using the selection key .
Generating 0 V test signal: In the service mode you can generate a test
signal of 0 V at the BNC jack ANALOG OUT on the back of the laser
vibrometer. To do so, proceed as follows:
1. Change into service mode by holding the key SET pressed and then press
the selection key .
2. Generate the 0 V test signal by then pressing the key SET several times
until the following display appears.
The 0 V test signal is only emitted while this display is shown.
3. Exit service mode using the selection key .
5.7 Overrange Indicator
The overrange indicator is shown on the right of the PDV display next to the
measurement range indicator Velo (refer to
FIGURE
5.4).
Figure 5.4: Display with overrange indicator
If the overrange indicator is lit up continuously, it means that the
measurement range set is being exceeded. In this case, the next highest
measurement range must be set. You will find detailed information on this in
SECTION
4.2.1.
ServiceMode:
Output=Full
ServiceMode:
Output=Zero
V e l o :
L P : H P :
1 0 0
2 2 N