20
Before proceeding with the fol-
lowing steps, review the Safety
Precautions in Paragraph 3.2.
a.
Set the function switch to
AC Volts only position.
b.
Plug the black test lead
into the -COMMON jack
and the red test lead into
the OUTPUT jack.
c.
Set the range switch at
one of the range positions
marked 2.5V, 10V, 25V,
50V, or 250V.
d.
Connect the test leads
across the circuit being
measured with the black
test lead to the ground
side.
e.
Turn on the power in the
test circuit. Read the out-
put voltage on the appro-
priate AC voltage scale.
For the 0-2.5V range, read
the value directly on the
scale marked 2.5VAC. For
the 10V, 25V, 50V, or 250V ranges, use the red scale marked AC and read the
black figures immediately above the scale.
3.10 Decibel Measurement (-20 to +50 dB)
Certain industries measure in terms of voltage or current ratios (decibels) based
on a specific reference level. The dB scale on the 260-8 serves this purpose and
is calibrated to a reference level (zero dB) of 0.001 watt into 600 ohms. The scale
calibration of -20 to +10 dB is for the 0-2.5V range (zero dB = 0.775V). Higher
ranges may be used by adding an appropriate dB value to the reading in accor-
dance with the chart below.
a.
Review the safety precautions in paragraph 3.2.
b.
Use operating instructions for AC VOLTAGE MEASUREMENT, 0-2.5/10/25/
50/250V RANGES (paragraph 3.8).
c.
Read decibels on the bottom scale marked dB. For the 10/25/50/250V ranges,
add the appropriate factor from the following chart.
Figure 3-3 Frequency Response,
Output Ranges
e
g
n
a
R
e
g
a
t
l
o
e
V
g
n
a
R
B
g
d
n
i
d
a
e
R
V
5
.
2
-
0
0
1
+
o
t
0
2
y
-
lt
c
e
r
i
d
d
a
e
r
V
0
1
-
2
0
2
+
o
t
8
g
-
n
i
d
a
e
r
o
t
B
d
2
1
+
d
d
a
V
5
2
-
0
0
3
o
t
g
0
n
i
d
a
e
r
o
t
B
d
0
2
+
d
d
a
V
0
5
-
6
0
3
+
o
t
6
g
+
n
i
d
a
e
r
o
t
B
d
6
2
d
d
a
V
0
5
2
-
0
0
5
+
o
t
0
2
g
+
n
i
d
a
e
r
o
t
B
d
0
4
d
d
a
+4
+2
0
-2
-4
-6
-8
-10
10Hz
100Hz
1KHz
10KHz
100KHz
FREQUENCY
PERCENT RELA
TIVE ERR
O
R
+10
+8
+6
2.5 VAC RANGE
10VAC RANGE
25/50 VAC RANGE
250 VAC RANGE
OUTPUT RANGES
Содержание 260-8XPI
Страница 1: ...Simpson 260 Series 8XPI Volt Ohm Milliammeters Instruction Manual...
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