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HT155 - HT157
EN - 8
4.4.
DISPLAY CONTRAST ADJUSTMENT
The instrument allows adjusting the display contract, proceeding as follows:
1. Turn on the instrument by pressing the
key. The display shows the following
screen:
Fig. 4: Display contrast adjustment
2. Within 5s, press the arrow keys “
” and “
” respectively to decrease or increase the
contrast level of the display. This parameter is shown in the upper right-hand part of the
box “Realtime Analyzer”. Up to 30 contrast levels are possible
4.5.
TURNING ON/OFF THE INSTRUMENT
Respect the following instructions when turning on and off the instrument
Press
the
key to turn on the instrument. The main screen in which the possible
measuring modes are listed is shown on the display. Use the keys “ ” and “
” for
selecting and confirm with “
”. If no key is pressed within 5s, the instrument
automatically sets itself to the last mode used
Pressing
the
key when measuring automatically resets the system and brings the
instrument back to the initial selection menu
Press the
key to turn off the instrument. With the instrument turned off, the
instrument’s clock does not stop working thanks to the internal back-up battery. This
battery is continuously recharged when the instrument is measuring and at least 24
hours are necessary for a complete charge. With fully charged back-up battery, the
internal clock is maintained for over 3 months
The measurement results are saved in an internal flash memory and are always
maintained even with no external power supply or with the instrument turned off
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 ...