Ht-instruments HT157 Manuale Utente Scaricare il pdf (Pagina 49)

HT155 - HT157

EN - 47

7.1.5. RECALLING THE DATA OF THE ANALYSIS IN THIRD-OCTAVE BAND (1/3) ON

THE DISPLAY

1. Select a datum corresponding to the “1/3OCT” indication available in the list of saved

measures and press “ ”. The instrument shows the following screens, which can be

selected by using the “” or “” keys

Fig. 51: Numerical screens of 1/3 analysis data

Line 1 (Page1)

This line shows the measure name defined in the programming menu

(see § 4.6)

Line 2 (Page1) This line shows the date/time when measurement was started

Line 3 (Page1) The type of “1/3OCT” measurement is shown

Line 4 (Page1) This line shows the measuring range selected before starting measuring

Lines 5-10

These lines show the numerical values measured by the instrument

(Leq1s o Leq,T), divided into each central band frequency, f0 (Hz),

considered

CAUTION

Independently from the type of frequency weighting selected for measurement,

the saved data include anyway also the results obtained with Z (Zero)

weighting

2. Press the “ ” key to access the graphic display of the spectrum analysis in 1/3 octave

band. The instrument displays the following screen:

Fig. 52: Graphic display of 1/3 spectrum analysis

3. Press the “ ” key to go back to the previous screen and to the initial screen

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Ht-instruments HT157 Manuale Utente Pagina 49