Relative Mode - Ideal 61-497 Manual De Instrucciones

3. dB and dBm (ACV / ACmV only)
PRESS
AUTO
kHz
AC
ENTER
V
dB
dBm
dB
dBm
PRESS
CANCEL
The decibel (dB) is a logarithmic unit of measurement that expresses
the magnitude of a physical quantity relative to a specified or implied
reference level. The dB and dBm are defined below.
V
AC
dB = 20 log
1
V
AC
dBm = 20 log
0.7746
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AUTO
dB
AC
V
dB
PRESS
AUTO
dB
AC
V
dBm
dBm
13

4. Relative mode

AUTO
dB
mV
V
OFF
A mA COM V
MAX
10A
FUSED
In the relative mode, the meter records the current input value as
reference and appears on the upper display. The after input values
will calculate the difference (
value or the difference percent (%) of the reference value and the
input value.
PRESS
V
AC
ENTER
V
PRESS
A mV A
Hz% V
°C°F OFF
Hz °C CANCEL
A mA COM V
600V
CAT IV
1000V
MAX MAX
CAT III
mA mA
MAX
FUSED FUSED
10A
FUSED
AC 2V AC 3V
PRESS
V
mV A
V
OFF
A mA COM V
MAX
MAX mA
10A FUSED
FUSED
AC 3V
) of the reference value and the input
14
AC
V
Hz%
°C°F
Hz °C
600V
CAT IV
1000V
CAT III
AC
V
Hz%
°C°F
Hz °C
600V
CAT IV
1000V
CAT III