12391 NIST CAL CERT Simpson, 12391 NIST CAL CERT Datasheet - Page 22

• Manufacturer Part Number: 12391 NIST CAL CERT
• Description: Analog Multimeters 260-8P VOM NIST CAL CERT W/O DATA
• Manufacturer: Simpson

Specifications of 12391 NIST CAL CERT

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

4.8
Figure 4-10. Jacks and Switch
Positions for Output Measurements
e.
Some industries measure in terms of voltage or current ratios (decibels) based
on a specific reference level. The dB scale on the 260-8P serves this purpose and
is calibrated to a reference level (zero dB) or 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.
b.
c.
Do not use the 500V or 1000V ranges for decibel readings.
d.
V
0
0
0
0
0
2 -
1 -
2 -
5 -
2 -
O
A.C. VOLTS
COMMON
L
5 .
0
5
0
5
ONLY
Turn on the power in the test circuit. Read the output voltage on the appropri-
ate AC voltage scale. For the 0-2.5V range, read the value directly on the
scale marked 2.5V AC. For the 10V, 25V, 50V, or 250V ranges, use the red
scale marked AC and read the black figures immediately above the scale.
Decibel Measurement (-20 To +50 dB)
Review the safety precautions in paragraph 4.1.
Refer to Figure 4-11 for switch settings and jack connections.
Use operating instructions for AC VOLTAGE MEASUREMENT,
Read decibels on the bottom scale marked dB. For the 10/25/50/250V ranges,
add the appropriate factor from the following chart:
T
V
V
V
0
-
0-2.5/10/25/50/250V RANGES (paragraph 4.6.1).
V
A
V
G
OUTPUT
350 VDC
MAX.
E
500 MA.
2.5 V.
10 V.
1V.
25 V.
50 A.
250 V.
500 V.
I000 V.
R
AMPS.
ALL TERMINALS 1 V MAX
A
N
260
G
E
d
2 -
8 -
0
+
+
B
6
2
o t
0
0
o t
o t
R
o t
3
o t
A
+
0
+
+
2
N
+
3
1
2
6
5
G
0
0
22
E
+10
-10
+8
+6
+4
+2
-2
-4
-6
-8
10Hz
0
Figure 4-9. Frequency Response
Output Ranges
R
e r
a
a
a
a
25/50 VAC RANGE
d
d
d
d
E
250 VAC RANGE
a
2.5 VAC RANGE
100Hz
d
d
d
d
10VAC RANGE
A
d
OUTPUT RANGES
+
+
2
4
D
i d
1
2
6
0
N I
e r
2
0
d
d
G
c
B
B
d
d
1KHz
y l t
B
B
o t
o t
FREQUENCY
o t
o t
e r
e r
e r
e r
a
a
10KHz
d
d
a
a
d
d
n i
n i
n i
n i
g
g
g
g
100KHz
1MHz