⑪ (Toggles between DC and AC; Toggles between
°C and °F in the Temperature mode). Press the
D
C/AC button to togg
l
e between
D
C and AC when
measuring volts (except mV) or amperes.
W
hen the
displayed and when the Fahrenheit scale is sele
c
ted, the
“°F” symbol is displayed on the LCD.
⑫
(Total Harmonic Distortion measurement of
the Line Voltage or Current at 50/60 Hz). [Model: 509THD
O n l y ]
When measuring AC vo
l
tage or amperes in the 50Hz (or
60Hz) power line, press and hold down the DC/AC button for
2 seconds to select the THD @ 50/60Hz mode. This mode
enables the user measure THD (Total Harmonic Distortion)
in percentage (%) from the 50Hz (or 60Hz) power line. (See
4.5 THD @ 50/60Hz.)
When this Meter enter into the THD @ 50/60Hz mode, the
digital reading (that is, the TRUE-RMS value of voltage and
amperes be
i
ng measured) disappears and the symbol, %,
and decimal points are displayed on the LCD.
After about 2 seconds from this moment, the THD
v
alue in
percentage (%) will be displayed. To exit the THD @ 50/60Hz
mode, press and hold down the DC/AC button for 2 second
s
again. The symbol, “%”, disappears. This feature is typically
found in much more expensive power analyzing meters.
⑬ OFF. Power to the Meter is turned off.
⑭ ROTARY SWITCH. Describes functions that are selected by
setting the rotary switch.
µA
Microamperes dc/ac
mA Milliamperes dc/ac
10A Amperes dc/ac mV Millivolts dc only
V Volts dc/ac Ω Resistance
10 11
All measurements wil
l
be displayed as the difference
between the stored value and the measured value. Negative
readings are lower than the stored value. Positive readings
are higher than the stored va
l
ue. Pushing the REL button
again exits the mode.
Press the arrow (
→
) button to shift the blinking number
position to the left by 1 decimal point when the Meter is in
the Ed
i
ting mode. When the blinking number is at the very
right, the number will stay at the same position even if you
press the arrow (
→
) button.
⑩
. (% Readings in the Percentage mode; A
Decrement button when the Meter is in the Editing
mode). In the Percentage mode, this Meter displays the
difference in percentage between the stored reference value
and the measured value.
Press the % button. The “%” symbol will come on the LCD and
the bar graph pointer will be at the zero on the scale. To reca
l
l
the stored reference value, press the HI/LO (RANGE) button.
Press the EDIT button. Using the arrow buttons, enter the value
you want the readings displayed as a per
c
entage of. Once the
value is entered, press the EDIT button to exit the mode.
All measurements will be displayed as the difference in
percentage between the stored reference value and the
measured value. Negative readings are lower than the
stored value. Positive readings are higher than the stored
value. Pushing the % button again exits the mode.
Press the arrow
(
↓
)
button to decrease the blinking number
displayed on the LCD by 1 digit when the Meter is in the
Editing mode.
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