HT Instruments HT4020 Manual De Instrucciones página 39

4.2. DESCRIPTION OF FUNCTION KEYS
4.2.1. D-H/ key
This key enables the HOLD function. The symbol "H" is displayed when this function is
enabled. To disable this function press the D-H key again or rotate the selector switch to
another position.
Press and hold the D-H/
automatically turns off about 5 seconds after the last rotary selector switch or button
actuation.
4.2.2. FUNC and
This key allows the user to cycle through each function's measurement modes with each
key press.
• V
: press
Press and hold the
activate the voltage harmonic measurement. By pressing the H and H keys
the individual harmonic values are displayed. This function mode is disabled by
pressing and holding the
the selector to any other position
•
: press
Press and hold the
activate the current harmonic measurement. By pressing the H and H keys
the individual harmonic values are displayed. This function mode is disabled by
pressing and holding the
the selector to any other position
•
: press
• W:
press
energy, and power factor measurements on single-phase systems.
• W3: press
energy, and power factor measurements on three phase balanced systems.
4.2.3. MAX/MIN/PK and MAX/MIN/PK/H key
By pressing and holding the MAX/MIN/PK key for at least 1 second, the instrument
activates the maximum (MAX), minimum (MIN), average (AVG) and peak (PK)
measurement modes. All of these values are continually updated even if only one of them
is displayed. By repeatedly pressing the MAX/MIN/PK key each value is displayed with the
corresponding frequency. To disable this function press and hold the MAX/MIN/PK key for
at least 1 second or rotate the selector to any position. In HARM measurement (HT4022)
the pressure of MAX/MIN/PK/H key allows to decrease the order of AC voltage or current
harmonic (see § 4.3.3 and § 4.3.7)
4.2.4. ENERGY and ENERGY/H key
With the rotary selector on "W" or "W3" position, press and hold this key at least 1
second to activate the energy measurement (see § 4.3.8 and § 4.3.9). The pressure of
ENERGY/H key allows to increase the order of AC voltage or current harmonic (see §
4.3.3 and § 4.3.7). Push ENERGY key and keep it pressed at least 1 second to escape
from the energy measurement mode
key for 1 second to enable the backlight. The backlight
FUNC/HARM key
FUNC key to select between voltage and frequency measurement.
FUNC/HARM key (HT4022) for at least 1 second to
FUNC key to select between current and frequency measurement.
FUNC/HARM key (HT4022) for at least 1 second to
FUNC key to start phase sequence detection.
FUNC key to select between active energy, reactive energy, apparent
FUNC key to select between active energy, reactive energy, apparent
FUNC/HARM key for at least 1 second or rotating
FUNC/HARM key for at least 1 second or rotating
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HT4020 - HT4022