HT instruments HT157 - Manual (Page 24)

HT155 - HT157
EN - 22
Lines 2- 7
These lines show in real time the instant values of the following
quantities, measured by the instrument: LAFp, LCFp, LZFp, LASp,
LCSp, LZSp, LAIp, LCIp, LZIp, LAeq1s, LCeq1s, LZeq1s
corresponding to the impulse levels of sound pressure with weightings A,
C, Z and time constants Slow (S), Fast (F) and Impulse (I)
Line 8
The left part of the line shows a graphic bar, which dynamically updates
the values of the instant quantities: LAFinst, LASinst, LAIinst, LCFinst,
LCSinst, LCIinst, LZFinst, LZSinst, LZIinst found on the right part, by
moving the cursor on one of them by means of the “ ” or “
” keys and
selecting them by means of the “ ” or “ ” keys. Please note that each
segment of the graphic bar corresponds to 10dB within the selected
range
Line 9
This line shows:
 The “ ” icon, which indicates the battery charge level
 The “
” icon, which indicates the Integral mode selected
 The “
” icon, to indicate the type of instant display and the “Integ”
icon, to indicate the integration measurement
 The messages “Ready”, “Run”, “Finish” and “End” to indicate
respectively that the instrument is ready to carry out a recording
(Integr mode), that a recording is in progress, that a recording has
finished and that the whole operation has been completed
 The “ ” icon which allows saving the values on the display in the
instrument’s memory
3. In the instant 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 the cursor flashing on the “ ” icon, press the “ ” or “ ” keys to instantly
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 the cursor flashing on the “ ” icon, press the “ ” or “ ” keys to instantly
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
4. By using the “
” or “ ” keys, the instrument goes to the following screen relevant to
the integrated quantities: