Measurement: Harmonie distortion of
1.Press button "RMS" and "Filter Off".
2.Measure level of a reeorded 333
3.Press button "1 kHz" filter.
4.Measure 1 kHz eontent (3rd harmonie of 333 Hz)
If the 333 Hz level amounts to e. g. 100 mV and the 1 kHz level to 4 mV the harmonie distortion eorresponds to 4 %. Through a limited slope of the 1 kHz filter only harmonie distortions of ~ 1 % ean be measured.
Measurement: Harmonie dlstortion with 1 kHz harmonie distortion filter (1 kHz STOP).
1.Press button "RMS" and"Filter Off".
2.Measure 1 kHz level at the test piece output.
3.Press button "Res 1" or "Res 2" (UPM 550) resp. button "1 kHz - STOP" (UPM
At this measurement it must be eonsidered that the UPM 550 resp. UPM
External Filters
The rear panel is fitted with two
Filter Characteristics and Frequency Response of the UPM 550
OFilter OFF
DIN_weighting filter (Unweighted noise)
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Frequency range of the Universal Level Meter UPM 550 in dependence from the used mode of
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2 | RMS | " | OFF' |
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4 | RMS | " | 1000 Hz |
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5 | RMS | " | CCIR | DIN 45405 |
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9 | Peak | DIN 45405 | OFF |
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10 | Peak | DIN 45405 | OFF |
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11 | Peak | DIN 45405 | 1000 Hz |
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14 | Peak | DIN 45405 | Ext. |
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15 | Peak | DIN 45405 | Res. 1,2 |
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UPM 550 Optional
UPM 550- B
BasIc board for option al
Weighted
Welghted noise filter lor
Weighted noise filter for
100 Hz band pass
1000 Hz - harmonie distortion filter
19 kHz band pass
38 kHz band pass
Filter to DIN 45301 with 19
30 kHz
330Hz band pass 3000 Hz band pass
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5 101 2 | S 102 2 | 5 103 2 | S 104 2 | S lOs 2 | 5 106 2 | Hz |
Accessories
Series transformer RVZ