12391 NIST CAL CERT Simpson, 12391 NIST CAL CERT Datasheet - Page 20

• 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

4.6.2
4.6.3
Do not attempt any voltage measurement which may exceed 1000 volts or the
circuit-to-ground voltage of the Instrument, 1000 volts maximum.
Be sure that the range switch is set to the 250V/500V/1000V range, function
switch to AC Volts Only position, and test leads connected to common and 500V
jack.
Do not touch the Instrument or test leads while the power is on the circuit being
measured.
Use extreme care when working in high voltage circuits. Do not handle the Instru-
ment or test leads while the circuit being measured is energized. OBSERVE ALL
SAFETY PRECAUTIONS in paragraph 4.1 and in the instruction manual for the
equipment being tested.
Before proceeding with the following steps, review the Safety Precautions in
Paragraph 4.2.
a.
NOTE: The meter will not indicate if the
b.
c.
d.
e.
f.
g.
Use extreme care when working in high voltage circuits. Do not handle the Instru-
ment or test leads while the circuit being measured is energized. OBSERVE ALL
SAFETY PRECAUTIONS in paragraph 4.1 and in the instruction manual for the
equipment being tested.
Do not attempt any voltage measurement which may exceed 1000 volts or the
circuit-to-ground voltage of the Instrument, 1000 volts maximum.
AC Voltage Measurement 0-500V Range
Set the function switch at AC Volts
Only position. (Figure 4-7).
switch is incorrectly set to a DC po-
sition.
Set the range switch at the 250V/
500V/1000V position.
Plug the black test lead into the -
COMMON jack and the red test lead
into the 500V jack.
Be sure the power is off in the circuit
being measured and that all its ca-
pacitors have been discharged.
Connect the test leads across the
circuit voltage to be measured with
the black lead to the grounded side,
if any.
Turn on the power in the circuit be-
ing measured.
Read the voltage on the red scale
marked AC. Use the 0-50 figures and
multiply by 10.
AC Voltage Measurement 0-1000V Range
!
!
20
Figure 4-7. Jacks and Switch
Positions for Measuring AC Voltage,
0-500V Range
A.C. VOLTS
COMMON
ONLY
-
2.5 V.
10 V.
1V.
25 V.
50 A.
250 V.
500 V.
I000 V.
AMPS.
ALL TERMINALS 1 V MAX
260
A.C. D.C.
500 V.