Description Of Function Keys; Hold Key; Hz% Key; Rel Key - HT Instruments HT60 Manuel D'utilisation

4.2.

DESCRIPTION OF FUNCTION KEYS

4.2.1. HOLD key

Pressing the HOLD
pressing this key, the message
to exit the function.
Press and hold the same key for longer than one second to activate and deactivate the
display s backlight. This function is active in any position of the rotary switch.
'

4.2.2. Hz% key

Press the Hz% key to select frequency measurement and duty cycle test in positions
V Hz% and Hz% of the rotary switch. The frequency range is different in the two
positions.

4.2.3. REL key

Press the REL key to activate relative measurement. The instrument zeroes the display
and saves the displayed value as a reference value which subsequent measurements will
be referred to. The symbol
following measurements: Hz, Duty Cycle, Continuity Test, Diode test and Temperature.
Press the key again to exit the function.

4.2.4. MODE key

Pressing the MODE key allows selecting a double function on the rotary switch. In
particular, it is active in position 
measurement, resistance measurement and in positions V
DC voltage selection.

4.2.5. LoZ feature

This mode permits to perform the AC/DC voltage measurement with a low input
impedance in way to avoid the wrong readings due to stray voltage in capacitive coupled.
Inserting the instrument between phase and ground conductors, the RCDs
protection devices can be tripping out during the test. For phase-PE voltage
measurement after a RCD device preliminarily connect the test leads
between phase and neutral cables at least for 5s, then perform the phase-
PE measurement to avoid unexpected trips-out.

4.2.6. Auto-Power-Off function

In order to preserve internal batteries, the instrument switches off automatically
approximately 30 minutes after it was last used. Turn the rotary switch to OFF before
switching on the instrument again by turning the switch to any other position.
key freezes the value of the measured quantity on the display. After
HOLD appears on the display. Press the HOLD key again
" "
REL appears on the display. This function is not active for the
" "
to select diode test, continuity test, capacity
CAUTION
EN - 7
Hz% and LoZV
HT60
for AC or