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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:
Summary of Contents for HT155
Page 1: ... Copyright HT ITALIA 2011 Release EN 1 02 28 12 2011 HT155 HT157 User manual ...
Page 2: ......
Page 62: ...HT155 HT157 EN 60 12 APPENDIXES 12 1 APPENDIX 1 FREQUENCY WEIGHTING CHARACTERISTICS ...
Page 63: ...HT155 HT157 EN 61 12 2 APPENDIX 2 CHARACTERISTICS OF 1 3 OCTAVE BAND FILTER ...
Page 64: ...HT155 HT157 EN 62 ...
Page 65: ...HT155 HT157 EN 63 ...
Page 67: ...HT155 HT157 EN 65 12 4 APPENDIX 4 CHARACTERISTICS OF 4HZ HIGH PASS DIGITAL FILTER ...