HT instruments HT8100 - Manual (Page 9)

HT8100
EN - 8
4.3. INTERNAL MODES OF THE INSTRUMENT
4.3.1. MIN/MAX/AVG
measurement
In any function, except for the current generation function, it is possible to activate the
detection of the Maximum, Minimum and Average (AVG) values of the quantity being
tested as follows:
1. Use the 4-arrow selector to select the “MAX”, “MIN” or “AVG” symbols flashing at the
bottom of the display.
2. Confirm selection by pressing the ENTER key.
3. The 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 symbol
“AVG” shows on the display the value of the average between the maximum and the
minimum value currently shown on the display.
4. Press the CANCEL key or turn the rotary switch to exit the function.
4.3.2. AutoTest and Manual Test mode
In measuring functions “V”, “mV” and “A” it is possible to use the following two modes:
 AutoTest  it allows the automatic detection of AC or DC measurement of voltage or
current. The message “AUTOTEST” is shown on the display. This is the mode set
whenever the instrument is switched on.
 Manual Test  it allows manually setting the AC or DC measurement of voltage or
current.
Press the MODE key to switch from AutoTest mode to Manual mode. The message
“AUTOTEST” disappears from the display and the modes “DC” or “AC” can be selected by
pressing the MODE key again. Press and hold the MODE key for 2 seconds to go back to
the AutoTest mode, or switch off and then on again the instrument.
4.3.3. AC+DC
mode
When measuring voltage and current, by pressing the MODE key it is possible to select
the “AC+DC” measuring mode, which also allows evaluating a possible presence of
overlapping direct components on a generic alternating waveform. This can be useful
when measuring typical impulsive signals of non-linear loads (e.g. welding machines,
electric ovens, etc.).
4.3.4. HFR
mode
In measuring functions “V
”, “mV” and “A”, by pressing the HFR key in Manual mode, it
is possible to select “HFR” (High Frequency Reject) measurement. In this case, the AC
voltage measurement is carried out considering a maximum signal frequency of 800Hz,
and this allows eliminating different harmonic components from it. Press the HFR key to
exit the “HFR” mode.