HT instruments HT157 - Manual (Page 28)

HT155 - HT157
EN - 26
3. Press the “ ” key to start recording the values of the spectrum analysis 1/1 with a
duration equal to the total measuring time (Tm) defined in the programming menu (see
§ 4.6). In this condition, the indication of the measuring range disappears and the
measuring time appears, and cannot be changed while recording, and the “Leq,T” icon
appears automatically on the display. The instrument displays the following screen:
Fig. 24: Activation of recording of 1/1 spectrum analysis
3. By pressing the “ ” key while recording, the instrument is paused. Press the key a
second time to start recording again
4. When the instrument reaches the measuring time (Tm = Ts), the instrument stops the
integration measurement and the data are automatically saved in the memory
5. When pressing the “ ” key with paused instrument, measurement is stopped and the
result is saved in the internal memory
6. When pressing the “ ” key with paused instrument, the measurement being carried
out is cancelled and the instrument waits for a new recording
7. In the List and Leq1s display, the following operations associated to the “ ” icon
are possible:
 With cursor flashing on the “
” icon, press the “ ” key to save the instant data
shown on the display in the memory area (see § ). During this operation, the “ ”
icon is completely highlighted for a few seconds, before it goes back to normal
display, to indicate correct saving
 With cursor flashing on the “ ” icon, press the “ ” or “ ” keys to select the
“Lock” option. Subsequently, press the “ ” key to lock the quantity data values
shown on the display. Press “ ” again to exit the “Lock” function
 With cursor flashing on the “ ” icon, press the “ ” or “ ” keys to select the
“Max” option. By subsequently pressing the “ ” key, the instrument shows the
maximum value of the quantities shown on the display, and the value automatically
updates when a higher value is detected. Press “ ” again to exit the “Max” function
8. With cursor flashing on the “ ” icon, press the “ ” or “ ” keys to access the
“Graph” graphic display of the measure (or select the “Graph” icon in the main menu).
The instrument displays the following screen: