HT instruments HT701 - Manual (Page 8)

HT701
EN - 7
4.2. DESCRIPTION OF FUNCTION KEYS
The following § describes the functions of the different keys. When pressing a key, the
display shows the symbol of the activated function and the buzzer sounds.
4.2.1. HOLD/LOCK key
Pressing the HOLD/LOCK key:
 in any function, except for the insulation measurement, keeps the value of the
measured quantity shown on the display. The message “HOLD” appears on the
display. Press the HOLD key again, the MODE key, the RANGE key or turn the rotary
switch to exit the function.
 When measuring insulation (see § 4.4.9), pressing the HOLD/LOCK key allows
blocking the test voltage set and carrying out a continuous measurement. The symbols
“ ” and “LOCK” appear on the display. Press the TEST key to exit the function.
4.2.2. MAX/MIN/
 key
Pressing the MAX/MIN/
 key:
 in any function, except for insulation measurement, activates the detection of
Maximum, Minimum and Average (AVG) values of the quantity being tested. Both
values are constantly updated, as soon as the instrument measures a higher (MAX) or
lower (MIN) value. The display shows the symbol associated with the selected function:
“MAX” for maximum value and “MIN” for minimum value. The flashing symbol “MAX
MIN” shows the current value on the display. The symbol “AVG” shows on the display
the value of the average between the maximum and the minimum value currently
shown on the display. Press and hold the MAX/MIN/
 key for 2 seconds, the MODE
key, the RANGE key or turn the rotary switch to exit the function.
 In “RECALL” function (recalling the data saved in the memory on the display – see §
4.2.5), the
 key allows selecting the memory cell before the one currently shown on
the display.
4.2.3. Hz/
0/ key
Pressing the Hz/
0/ key:
 in functions “V ”, “mV” and “mA” allows selecting voltage or current frequency
measurement. The symbol “Hz” is shown on the display. Press the key again or turn
the rotary switch to exit the function.
 In functions “ ” and “ ” (for values < approx. 3 - e.g.: short-circuited test leads) it
allows measuring the quantity to be tested. The symbol “
0” appears on the display,
initially steady. When pressing the key, the symbol “
0” flashes and the value of the
quantity being tested is saved as offset for the following measurements. The display
shows the relative value, obtained as: relative value (displayed) = current value –
offset. Press the Hz/
0/ key, the MODE key, the RANGE key or turn the rotary
switch to exit the function.
 In “RECALL” function (recalling the data saved in the memory on the display – see §
4.2.5), the
 key allows selecting the memory cell after the one currently shown on the
display.
4.2.4. MODE key
The MODE key allows:
 Selecting the functions on the rotary switch, highlighted in orange.
 Quitting sub-functions selected on the instrument.
 Switching from AutoTest mode to Manual mode (see § 4.3.3).
 Deleting the internal memory of the instrument (see § 4.2.5)