HT instruments HT401 - Manual (Page 8)

HT401
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. RANGE
key
Press the RANGE key to activate the manual mode and to disable the Autorange function.
The symbol “RANGE” appears in the upper left part of the display. In manual mode,
cyclically press the RANGE key to change measuring range: the relevant decimal point will
change position. The RANGE key is not active in the switch position
/ . In Autorange
mode, the instrument selects the most appropriate ratio for carrying out the measurement.
If a rdg is higher than the maximum measurable value, the indication “O.L” appears on the
display. Press and hold the RANGE key for more than 1 second to exit the manual mode
and restore the Autorange mode.
4.2.2. VoltSense
key
The VoltSense key permits the detection of AC voltage without contact. Perform the
herewith steps:
1. Switch on the instrument in any position of selector
2. Approach the instrument close to the point of test
3. Press and hold the VoltSense key. If an AC voltage is detected a continuous sound is
emitted by the instrument and the number of LCD segments indicates the intensity of
electric field in the point of test. In case of no indication from the instrument a
voltage could be present
4. Release the VoltSense key to exit from the function
4.2.3. MIN
MAX key
Pressing the MIN MAX key once activates the detection of maximum and minimum values
of the quantity being tested. Both values are constantly updated and are displayed
cyclically every time the same key is pressed again. 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 MAX
MIN key is not active when the HOLD function is activated.
Press and hold the MIN MAX key for more than 1 second or turn the selector to exit the
function.
4.2.4. SMART HOLD key
Pressing the SMART HOLD key keeps the value of the measured quantity on the display.
The symbol “HOLD” appears on the display, the instrument emits a continuous acoustic
alarm and the display flashes if the measured value differs by more than 50 dgt from the
value read on the display. Press the SMART HOLD key again or turn the rotary switch to
exit the function.
4.2.5. Backlight key
Press the
key to activate/deactivate the backlight of the display. This function is active
in any position of the rotary switch.
4.2.6. MODE key
Press the MODE key to activate the secondary functions (orange-coloured on the switch).
Pressing the key again takes the instrument back to primary (initial) functions.