HT instruments HT39 - Manual (Page 9)

HT37 - HT39
EN - 8
4.2. FUNCTION KEYS
When pressing a key, the corresponding symbol is displayed with a beep.
To resume default state turn the selector on another function.
4.2.1. MIN
MAX
By pressing MIN MAX key, maximum and minimum values are measured. Both values are
stored and can be recalled by pressing the same key. The symbol corresponding to the
desired function is displayed: “MAX” for maximum value, “MIN” for minimum value. MIN
MAX key is disabled when HOLD function is active. To exit this function keep MIN MAX
key pressed for at least 1 second or rotate the selector to another position.
4.2.2. PEAK/
∆
This key have the double function of measuring max/min peak values (active for
∼V and
∼A positions of rotary selector) and performing relative measurements (∆REL) for any
position of rotary selector other than
∼V and ∼A.
Press cyclically PEAK/
∆ to measure and save peak values. “P
MAX
” and “P
MIN
” symbols on
the display correspond to Maximum Peak and Minimum Peak values respectively which
are continuously updated by the meter. By keeping pressed PEAK/
∆ key for at least 3
seconds, “CAL” symbol appears on the display and the meter performs an auto calibration
permitting a higher accuracy on peak measurements.
To exit this function keep pressed PEAK/
∆ for at least one second or rotate the selector on
another position.
By pressing PEAK/
∆ key, the relative measurement is activated: the meter saves the
(offset) value on the display and the “
∆REL” symbol is shown. The following measurement
will be referred to this offset value. By pressing again PEAK/
∆ key the offset value is
shown and the “
∆REL” symbol is blinking.
To exit this function keep pressed PEAK/
∆ for at least one second or rotate the selector on
another position.
4.2.3. RANGE
By pressing RANGE key the manual mode is activated and the “RANGE” symbol is
displayed. Press RANGE cyclically to change the measuring range and fix the decimal
point on the display. RANGE is disabled on positions
/ ,
∼A and A performing
measurements in Autorange.
Keeping press for at least 1 second RANGE key or moving the rotary switch to exit from
this mode.
4.2.4. HOLD
By pressing HOLD the measured value is frozen on the display where the symbol “HOLD”
appears. To exit this function press HOLD again or rotate the selector to another position.