
— 11 —
[11] MEASURING OF LOW FREQUENCY OUTPUT(dB)
The dB value is scaled in the 3V AC range and only when the
impedance is 600
Ω
, 0dB is equal to 1mW and the output value can
be read directly. (0dB = 1mW = 0.775V at 600
Ω
)
1. The measuring procedure is the same as for measurement of
AC voltage.
2. Add the following dB values to dB values on the scale panel in
the ACV range.
Table 31
[12] MEASURING OF RESISTANCE (auto range)
Measurement of DC resistance below 200M
Ω
max.
Never apply an external voltage. Otherwise, the tester may be
damaged.
Caution:
Be sure to turn off the power source switch of
measured circuit when the resistance in the circuit is
measured.
Make sure that no voltage is applied to a resistor to
measure.
After preparation described in [8] PREPARATION FOR
MEASUREMENT has been completed, measure resistance as
follows.
1. Connect the plugs of the test leads to the measurement
terminals (-COM) and ( ).
2. Turn the function switch to
Ω
.
3. Set the range hold switch at
AUTO
.
4. Apply the test pins to an object.
5. Read the value as indicated on the range display. This is the
resistance you have measured.
6. After measurement, release the test pins from the object.
7. Return the function switch to
POWER OFF
.
AC voltage range 300mV
3V
12V
60V
300V
1000V
dB value to add
-20
0
+12
+26
+40
+52