Digital Stroboscope Type 4913 - BRUEL & KJAER 1050 Instruction Manual

To print out a list of the Front Panel Test Parameters, proceed as follows:
1. Repeat steps 1 to 4 listed above.
2.
Set the 1050 Address Switch 2 to "0": IEEE Format for an unformatted print-out
separated by semi-colons, or "1": Spec. Format for a line-by-line print-out.
3. Perform Reset 0.
4.
Select the test set-up for print out by pressing Front Panel Set-up "No.". Then press
Digital Interface "Output" (refer to section 3.4.1 ).
Any single set-up parameter can be printed out in this way by pressing the associat-
ed key followed by Digital Interface "Output".
4.3. DIGITAL STROBOSCOPE TYPE 4913
Fig. 4.6. Digital Stroboscope 4913
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The Digital Stroboscope Type 4913 can be used with the 1050 to provide slow motion or
frozen visual analysis of the structure under test (chapter 1, Fig. 1 0). The stroboscope
flash frequency is synchronized to the 1050 generator frequency. Consequently, an auto-
matic frequency sweep can be used for visual resonance detection and a manual fre-
quency sweep for detailed visual analysis at a resonance.
To operate the 4913 with the 1 050, proceed as follows:
1. Connect the Lamp Unit US 0008 to the Stroboscope Type 4913 following the prelimi-
nary adjustments given in the Instruction Manual for the stroboscope.
2. Connect either the 7V
L
0° or 7V
L
90° OUTPUT to the Ext. Trigger input of the
4913, using cable AO 0087.
3. Set the 4913 controls to Trigger Source "Ext.", Function Selector "Slow Motion"
and Display Selector "Slow Motion Frequency, Hz".
4. Once the 1050 is in operation, press the button on the handle of the Lamp Unit to
initiate synchronized flashing, and adjust the Slow Motion offset frequency to obtain
the desired image of the vibratory motion.
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