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1.2 Brief Introduction of Key Function
Power key - control the start / close of the instrument
It forms the instrument start combination key together with the rocker switch on the rear panel, and the power state
indicator light has three effects:
The first state is that both the rocker switch and the power key are disconnected, and the power key light is not on, which
is equivalent to the uncharged state.
The second state is that the ship switch is closed, the power key is disconnected, and the instrument is charged, thus it
can run in the standby state.
The third state is that both switches are closed and the instrument is in normal operation state.
Function key - switch display function
Every time Function is pressed, the indicator light on the right side of each display area switches and displays in a
certain sequence, indicating that the current display area displays different measurement functions. In the conventional
measurement mode and harmonic measurement mode, the switching sequence is different. (See Section 1.4 of this
volume for details)
Element key - switch input unit
It is used to select the input unit to be displayed, and the indicator light of the selected unit is on. Every time Element is
pressed, the instrument will be switched cyclically in the sequence of 1→2→3→∑→1.
Voltage key - select voltage range
When pressing this key, Display Bar A displays "VOLT", Display Bar B displays "Range", Display Bar C displays voltage range
options, default to Auto, and the voltage range is selected through navigation (up and down) key; when the range is set to
"Auto", the voltage "Auto" indicator light is on.
Current key - select current range
When pressing this key, Display Bar A displays "CURR", Display Bar B displays "Range", Display Bar C displays current
range options, default to Auto, and the current range is selected through navigation (up and down) key; when the range is
set to "Auto", the current "Auto" indicator light is on.
Wiring key - select the wiring mode
According to the wiring of the measuring circuit actually connected, the corresponding wiring mode is selected; when the
set wiring modes are 1P3W (single-phase three-wire system), 3P3W (three-phase three-wire system), 3P4W (three-phase
four-wire system) and 3V3A (three-voltage three-current meter method), the corresponding indicator light is on; when the
wiring mode indicator lights are not on, the wiring mode is 1P2W (single-phase two-wire system).
Hold / ESC key - data hold / escape function
When pressing the Hold/ESC key in the measurement value display interface, its indicator light will be on, the data will
stop updating and will remain displayed. When pressing Hold/ESC again, its indicator light goes out, with the updated
value displayed again.
In the setting interface, the function of Hold/ESC key is equivalent to ESC key. Pressing it can exit the setting interface.
Single key - perform a single measurement
When the measurement data is in the held state, pressing this key can perform the measurement once according to the
specified update period. After the measurement data is updated, it will remain displayed again. Every time you press the
Single key, the update rate indicator light is on once.
