Sanwa EM7000, Instruction Manual, Page: 46 / 68

DRAWING No.EM7000 09-1306 2040 2040
Read the meter indication using ACV (p-p) scales and red
figures in a unit of V p-p (peak-to-peak volt).
Detach the test pins from the circuit to be measured.
Turn off the power switch (power OFF: Lamp blinking goes off).
Observe the same precautions as those for the AC voltage
(ACV rms) measurement.
— 42 —
6-5 AF Output (dB) Measurement
1) Objects of measurement
Low frequency signals such as audio outputs of amplifiers.
2) Measuring ranges
11 dB (Addition table attached: Lower right of scale plate)
3) Measurement procedure
Insert the red plug of test leads into the +input terminal, and
the black plug into the –COM terminal.
Turn the function/range selector to the appropriate ACV rms
range, for instance, 3 V range (11 dB).
Turn on the power switch (power ON: Lamp blinks).
Turn the electrical zero adjuster (ZERO ADJ) to adjust the
pointer to the zero position of red ACV (rms) scales.
Apply the red and black test pins to two measuring points.
The polarity of test leads may be ignored.
Read the meter indication on dB scale in a unit of dB
(decibel).
Further, according to the set range (ACV rms), obtain a
value to add from the addition table at the lower right of
scale plate, and add it to the read value. This value is the
dB value at the measuring point. (*Note)
0
)
s
m r
(
V
C
A
11dB
B
d
ACV
RANGE
ADD
db
3
12
30
120
300
0
12
20
32
40
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