HT instruments HT4011 - Manual (Page 8)

HT4011
EN – 7
4.2. DESCRIPTION OF FUNCTION KEYS
4.2.1. HOLD key
Short pressing the “HOLD” key activates the function Data HOLD, i.e. the value of the
measured quantity is frozen. The message “HOLD” appears on the display.
This operating mode is disabled when the “HOLD” key is pressed again or the switch is
operated.
4.2.2. REL key
With the instrument's switch set to positions , , and AC current, this key allows zeroing
the displayed value and carrying out a relative measurement of the quantity being tested.
When pressing the REL key for the first time, the value of the quantity being tested is
saved as offset for the following measurements. The message “REL” appears on the
display. The instrument shows the relative value obtained as current value – offset. This
function is not active in resistance measurements, continuity, temperature and capacitance
tests, duty cycle tests and diode test. Press the REL key again or turn the rotary switch to
exit the function.
4.2.3. Hz% key
With the instrument's rotary switch set to positions , Hz, by pressing the Hz% key you
can switch to frequency (Hz) or duty cycle measurement (%).
4.2.4. MODE key
The MODE key is used to select resistance measurement, continuity test with buzzer, and
diode test with the instrument's rotary switch set to position

and to select AC and
DC voltage measurement with the switch set to position , , Hz.