Fluke PM3082, Service Manual

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6 - 4
PERFORMANCE TEST
Requirements:
1 - Verify that the oscilloscope starts at any input voltage between 100 and 240V; in particular the
line voltages 100, 120, 220 and 240V must be checked.
2 - Verify that the instrument’s performance does not change over the indicated voltage range;
and that the displayed Probe Adjust signal is distortion-free and has equal intensity.
6.3.3 Auto set
This test checks the correct working of the AUTOSET function.
Test equipment:
Fluke 5500A mode: levsine (Alternative: constant amplitude sine wave generator SG 503)
Test set-up:
5500A OSCILLOSCOPE UNDER TEST
5QQ CABLE
Settings/procedure:
1 - Apply a 10 MHz sine wave signal of 600 mV (pp into 50£2) to input CH1;.
2 - Press the green AUTOSET key. Use a 50Q termination at the end of the coax cable. For
instruments with switchable 50Q input impedance it is recommended to use the internal
termination (when active, the text ’LZ’ appears in the lower part of the viewing area). For
instruments without internal termination, an external termination should be used.
Requirements:
Verify that the displayed waveform is stable and properly triggered. Amplitude should be within the
screen area. Horizontally a number of signal periods should be displayed.
Repeat the same settings and procedure for CH2, CH3 and CH4.
6.3.4 Orthogonality
This test checks the angle between the horizontal and vertical deflection plates (orthogonality).
Test equipment:
Fluke 5500A mode: wavegen, wave sine (Alternative: function generator PM5136)