HP 3478A Technical Manual page 17

a. a. Loo Loosen t sen the sc he screw o rew on the r
cover and remove the cover. cover and remove the cover.
b. b. Loc Locate ate the the Lin Line Se
terminals. The wire and terminals are located near the terminals. The wire and terminals are located near the
3478A's power transformer (see 3478A's power transformer (see Figure 2-2)
c. c. Refer Refer to to Figure 2-2 Figure 2-2 and connect the wire to the
line terminal which corresponds to the desired line line terminal which corresponds to the desired line
voltage. voltage.
Figure Figure 2.2. 2.2. Line Line Select Select Jumper
d. d. After After chang changing t ing the L he Line V
rear panel to reflect the voltage change (mark the little rear panel to reflect the voltage change (mark the little
box under the instrument's power cord receptacle that box under the instrument's power cord receptacle that
corresponds to the new line voltage). corresponds to the new line voltage).
n the rear o ear of the 3 f the 3478 478A's t
e Selec lect wi t wire an re and th d the lin
Figure 2-2). .
and connect the wire to the
Jumper
ine Voltag oltage, ma e, mark th rk the 347 e 3478A's
Figure 2-2. Line Select Figure 2-2.
A's top op e. e. Re
2-9. 2-9.
e line e
2-10. 2-10.
configurations that are available to provide power to the configurations that are available to provide power to the
3478A. The -hp- part number shown directly below the 3478A. The -hp- part number shown directly below the
individual power plug drawing, is the part number for the individual power plug drawing, is the part number for the
power cord set equipped with the appropriate mating power cord set equipped with the appropriate mating
plug for that receptacle. If the appropriate power cord is plug for that receptacle. If the appropriate power cord is
not included with the instrument, notify the nearest -hp- not included with the instrument, notify the nearest -hp-
Sales/Service office and a replacement will be provided. Sales/Service office and a replacement will be provided.
2-11. 2-11.
8A's
2-12. 2-12.
Electrical Electrical
recommendation is to ground the instrument panel and recommendation is to ground the instrument panel and
cabinet. The 3478A is equipped with a three conductor cabinet. The 3478A is equipped with a three conductor
power cable which, when plugged into an appropriate power cable which, when plugged into an appropriate
receptacle, grounds the instrument. receptacle, grounds the instrument.
2-13. 2-13.
2-14. 2-14.
2-15. 2-15.
installed and is ready for use as a bench instrument. The installed and is ready for use as a
Line Select Jumper Jumper
Figure 2-3. Figure 2-3. Power Power Cords Cords
2-2 2-2
Rein inst stal all t l the he to top c p cov over er. .
POWER CORDS POWER CORDS AND AND RECEPTACLES
Figure 2-3 illustrates the different power plug Figure 2-3 ill ustrates the different power plug
GROUNDING REOUIREMENTS GROUNDING REOUIREMENTS
To protect To pr otect operating operating personnel,
Manufacturing Manufacturing
BENCH BENCH USE USE AND AND RACK RACK MOUNTING
Bench Bench Us Us
The 3478A The 3 478A is e is equipped quipped with
TM 11-6625-3071-14 TM 11-6625-3071-14
RECEPTACLES
personnel, the the National National
Association Association (NEMA) (NEMA)
MOUNTING
with feet feet and and tilt tilt stands stands
bench instrument. The