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HT instruments HT157 User Manual

Page 10

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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








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