Simpson 260 Series - Measuring Output Voltage

Operation
c. Plug the black test lead into the — COMMON jack and the red
test lead in the 1000V jack.
d. Be sure the power is off in the circuit being measured and that
all its capacitors have been discharged. Connect the test leads
to the circuit.
e. Connect the test leads across the circuit voltage to be meas-
ured with the black lead to the grounded side, if any.
f. Turn on the power in the circuit being measured.
g. Read the voltage on the red scale marked AC. Use the 0-10
figures and multiply by 100.
412 OUTPUT VOLTAGE MEASUREMENT
4.12.1 It is often desired to measure the AC component of an
Output Voltage where both AC and DC voltage levels exist. This
occurs primarily in amplifier circuits. The 260-7P has a 0.1 mfd,
400 volt capacitor in series with the OUTPUT jack. The capacitor
blocks the DC component of the current in the test circuit, but
allows the AC or desired component to pass on to the indicating
instrument circuit. The blocking capacitor may alter the AC re-
sponse at low frequencies but is usually ignored at audio frequen-
cies (Figure 4-4).
Do not connect the OUTPUT jack to a circuit in which
the DC voltage component exceeds 350V.
4.12.2 Before proceeding with the following steps, review the
Safety Precautions in Paragraph 4.2.
a. Set the function switch at AC (Figure 4-5).
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, 50V, or 250V.
4-13