HT instruments HT9022 - Manual (Page 12)

HT9022
EN - 10
4.1.3. Hand protection
CAPTION:
1. Hand protection
2. Safe area
Fig. 3: hand protection
Always keep your hands under the hand protection. This protection is always located in a
suitable position to guarantee a correct safety distance from possible exposed or live parts
(see Fig. 3)
4.1.4. Indication of the conventional direction of Current
The photo in Fig. 4: current direction arrow
shows an arrow which indicates the
conventional direction of current.
Fig. 4: current direction arrow
4.2. DESCRIPTION OF THE KEYS
4.2.1. Keys F1 – F2 – F3 – F4
Keys F1 - F2 - F3 - F4 take different functions according to the measure set (for detailed
information, see the single functions).
4.2.2. Key H
Short pressing key “H” activates the function Data HOLD, i.e. the value of the measures
quantity is frozen. The symbol "
H
" is displayed when this function is enabled.
This operating mode is disabled when key “H” is pressed again or the switch is operated.
4.2.3. Key
To improve the readability of the values measured in dark places, the display has been
provided with a backlighting function (backlight), which is turned on and off by long-
pressing key “H”. This function automatically deactivates after approximately 10 seconds
after being activated, in order not to discharge the battery.