HT HT61 Manual De Instrucciones página 34

HT61-HT62
4.2. DESCRIPTION OF FUNCTION KEYS
4.2.1. HOLD key
Pressing the HOLD key freezes the value of the measured quantity on the display. After
pressing this key, the message HOLD appears on the display. Press the HOLD key again
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to exit the function. Press and hold the HOLD key for a long time in order to
activate/deactivate the display s backlight. This function is activated in any position of the
'
rotary switch and is automatically deactivated after approx. 10s.
4.2.2. RANGE key
Press the RANGE key to activate the manual mode and to disable the Autorange function.
The symbol AUTO disappears from the upper left part of the display. In manual mode,
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press the RANGE key to change measuring range: the relevant decimal point will change
its position. The RANGE key is not active in Frequency measurement and Duty cycle test
and in positions and CAP (HT62) of the rotary switch. In Autorange mode, the
instrument selects the most appropriate ratio for carrying out measurement. If a reading is
higher than the maximum measurable value, the indication O.L appears on the display.
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Press and hold the RANGE key for more than 1 second to exit the manual mode.
4.2.3. MAX MIN key
Pressing the MAX MIN 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
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value. The MAX MIN key is not active when the HOLD function is activated. Pressing the
MAX MIN key the "AUTO" and bargraph disappears. The MAX MIN key is not active in
Frequency measurement and Duty cycle test and in positions and CAP (HT62) of
the rotary switch. Press and hold the MAX MIN key for more than 1 second or turn the
selector to exit the function.
4.2.4. Hz% key
Press the Hz% key to select frequency measurement and duty cycle test in positions
(AC), A
VHz%, 10AHz%, mA (AC) and Hz% of the rotary switch. The frequency
range is different in the different positions.
4.2.5. REL key
Press the REL key to activate relative measurement. The instrument zeroes the display
and saves the displayed value as a reference value which subsequent measurements will
be referred to. The symbol REL appears on the display. This function is not active for the
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following measurements: Hz, Duty Cycle, Continuity Test, Diode test and Temperature
(HT62). Pressing the REL key the "AUTO" and bargraph disappears Press the key again
to exit the function.
4.2.6. MODE key
Pressing the MODE key allows selecting a double function on the rotary switch. In
particular, it is active in position  and CAP
(HT62) to select diode test,
continuity test, capacitance measurement (HT62) and resistance measurement, in position
, A
Temp°C°F (HT62) to select temperature measurement in °C or °F and mA to
select AC or DC measurements.
4.2.7. Disabling the Auto Power Off function
The instrument switches off automatically approximately 15 minutes after it was last used.
The symbol appears on the display. To disable the Auto Power Off function, proceed
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as follows:
 Switch off the instrument (OFF)
 Press and hold the MODE key, switch on the instrument by turning the rotary switch.
The symbol disappears from the display
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 Switch off and then on again the instrument to enable the function.
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