Hameg HM8115-2 Manual page 35

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Warning signal in case of overrange
Overrange will be indicated by blinking horizontal bars in the
respective display(s) and an acoustical signal.
Warning signal setting
Switch off HM 8115-2 with switch
Switch HM8115-2 back on and push the righthand pushbutton
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of the FUNCTION pushbutton set.
Keep this button depressed until the LED "WATT" will light up.
This function will remain stored unless changed.
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VOLT
Pushbuttons and a LED are provided for the manual or auto-
matic selection of the voltage ranges. After turn-on the AUTO
LED will light up, the instrument will automatically select the
appropriate range. The selected range will be indicated by the
associated LED. If the voltage changes the range will automa-
tically follow.
If any of the manual select pushbuttons is depressed the aut-
orange mode will be left, the AUTO LED will extinguish. Then
any of the ranges can be manually selected. Pressing the AUTO
button will return the instrument to the autoranging function,
the AUTO LED will light.

The VOLT display will show the voltage at the terminals. If an
inappropriate range was selected manually this will be shown
by blinking horizontal bars in the display(s) and an acoustical
warning.
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AMPERE
Pushbuttons and LEDs are provided for the manual or auto-
matic range selection.
After turn-on of the HM8115-2 the AUTO LED will light up, the
instrument will automatically select the optimum range. The
range selected will be indicated by the associated LED.
If the current changes the range will automatically follow. If any
of the manual select pushbuttons is depressed the AUTO func-
tion will be left, the AUTO LED will extinguish. Then the desired
range can be selected manually. Pressing the AUTO button will
return the instrument to the autoranging function.
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O p e r a t i n g c o n t r o l s a n d d i s p l a y s
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The AMPERE display
terminals. If an inappropriate range was selected manually
blinking horizontal bars will be displayed, and an acoustical
warning signal will sound off.
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FUNCTION
The following functions can
be selected by the FUNC-
T I O N p u s h b u t to n s a n d
shown on the associated
display:
Active power (Watt)
Reactive power (CAr)
Apparent power (VA)
Power factor PF
WATT (Active power)
After turn-on the instrument
will automatically select the
active power mode, the LED
will light up, the display
will show the active power.
By using the FUNCTION
pushbuttons other functions
may be chosen.
Var (Reactive power)
In this mode the reactive power will be measured, the LED will
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light up, the display will show the reactive power.
The reactive power will be displayed as a positive value irre-
spective of any capacitive or inductive loads.
The reactive power display will also show correct
values if voltage or current are non-sinusoidal. The
apparent power (U
(arithmetic mean of u(t) x i(t) ) are independent of
the waveform, the reactive power is calculated from
both.
HINT
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will show the current through the
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10
x I ) and the active power
rms rms
Subject to change without notice
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