12391 NIST CAL CERT Simpson, 12391 NIST CAL CERT Datasheet - Page 19

• 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

4.6.1
a.
NOTE: The meter will not indicate if
b.
c.
d.
e.
f.
depending upon its waveform, the reading may be higher or lower than the true
RMS value of the measured voltage. Thus an error may be introduced if the 260
is used to measure a nonsinusoidal waveform. Also, accuracy is lessened at
higher input frequencies (Figure 4-5).
Before proceeding with the following steps, review the Safety Precautions in
Paragraph 4.1.
AC Voltage Measurement 0-2.5 Thru 0-250V Range
Set the function switch at AC
Volts Only position (Figure 4-6).
the switch is incorrectly set to a
DC position.
Set the range switch at one of the
five voltage range positions
marked 2.5V, 10V, 50V or 250V.
(When in doubt as to actual volt-
age present, always use the
highest voltage range as a pro-
tection to the Instrument. If the
voltage is within a lower range,
the switch may be set for the
lower range to obtain a more ac-
curate reading.)
Plug the black test lead into the -
COMMON jack and the red test
lead into the + jack.
Turn off power to the circuit to be
measured and discharge any ca-
pacitors.
Connect the test leads across the
circuit voltage to be measured
with the black lead to the
grounded side.
For the 2.5V range read the value
directly on the scale marked 2.5V
AC. For the 10V, 25V, 50V and
250V ranges, read the red scale
marked AC and use the black fig-
ure immediately above the scale.
19
+6
+5
+4
+3
+2
+1
-1
-2
-3
-4
-5
0
10Hz
Figure 4-6. Jacks and Switch
Positions for Measuring AC Voltages,
0-2.5 through 0-250V Ranges
Figure 4-5, Frequency Response
AC Voltage Ranges
1000 VAC RANGE
250 VAC RANGE
500 VAC RANGE
2.5 VAC RANGE
25 VAC RANGE
50 VAC RANGE
10VAC RANGE
100Hz
AC VOLTAGE RANGES
A.C. VOLTS
COMMON
ONLY
-
+
1KHz
2.5 V.
10 V.
1V.
25 V.
50 A.
250 V.
500 V.
I000 V.
FREQUENCY
AMPS.
ALL TERMINALS 1 V MAX
260
10KHz
100KHz
1MHz
Figure 3-1. Fro