Preparation For Use; Safety; Line Voltage And Power Cord; Line Fuse - Tektronix 2246 1Y Service Manual

SAFETY

This section tells how to prepare tor and to proceed
with the initial start-up of the TEKTRONIX 2246 1Y or
2246 Mod A Oscilloscope.
Refer to the Safety Summary at the front of this
manual for power source, grounding, and other
safety considerations pertaining to the use of the
instrument. Before connecting the oscilloscope to a
power source, read this section and the Safety
Summary.

LINE VOLTAGE AND POWER CORD

The 2246 1Y and 2246 Mod A operate on line
voltages from 90 to 250 V with line frequencies
ranging from 48 to 440 Hz. No line voltage selecting
is necessary. The detachable power cord may have
to be changed to match the power source outlet
(see Figure 2 -1 ).
The detachable three-w ire power cord has a three-
contact plug for connection to both the power
source and the protective ground. The power cord is
secured to the rear panel by a securing clamp. The
protective ground contact on the plug connects
(through the power cord protective grounding con­
ductor) to the accessible metal parts of the instru­
ment. For electrical-shock protection, insert this
plug into a power-source outlet that has a properly
grounded protective-ground contact.
Instruments are shipped with the required power
cord as ordered by the customer (see Figure 2-1).
Contact your Tektronix
Tektronix Field Office for additional power-cord
information.

PREPARATION FOR USE

representative or local
Section 2—2246 1Y and 2246 Mod A Service
Plug P o w e r C o rd /
O p tio n
C o n fig u ra tio n P lug T yp e
U .S , U .S .
S td . 120V
EURO
A t
2 2 0 V
U K a
A2
2 4 0 V
A u s tra lia n
A3
2 40 V
N o rth
A4 A m e ric a n
2 4 0 V
S w itz e rla n d
A5
2 20 V
a A 6A , ty p e C fu s e is a ls o in s ta lle d insid e th e plug o f th e O p tio n A2
p o w e r co rd.
b R e fe re n c e S ta n d a rd s A b b re v ia tio n s :
A N S I— A m e ric a n N a tio n a l S ta n d a rd s In s titu te
A S — S ta n d a rd s A s s o c ia tio n o f A u s tra lia
BS — B ritis h S ta n d a rd s In s titu tio n
CEE— In te rn a tio n a l C o m m is s io n on R ule s fo r th e A p p ro va l o f
E le c tric a l E q u ip m e nt
IEC— In te rn a tio n a l E le c tro te c h n ic a l C o m m is s io n
N E M A — N a tio n a l E le c tric a l M a n u fa c tu re r's A s s o c ia tio n
S E V — S c h w e iz e rv is c h e r E le k tro te c h n is c h e r V e re in
UL— U n d e rw rite rs L a b o ra to rie s Inc,
F ig u re 2-1. O p tio n a l p o w e r c o rd s .

LINE FUSE

S C AUTIO N <
The instrument may be damaged if operated
with the wrong type and rating line fuse
installed.
Line R eference
V o lta g e S ta n d a rd s 1 3
A N S I C73.11
N E M A 5 - 1 5 - P
120V
IEC 83
UL 198.6
CEE (7),
II, IV, VII
2 20 V
IEC 83
IEC 127
BS 1363
2 40 V IEC 83
IEC 127
A S C l 12
2 40 V
IEC 127
A N S I C 73.20
N E M A 6 - 1 5 - P
2 4 0 V
IEC 83
UL 198.6
SEV
2 2 0 V
IEC 127
2-1