SECTION
IV
MAINTENANCE
4.1
PREVENTATIVE
MAINTENANCE
The
Model
880
Dynamometer
type
movement
is
designed
to
withstand
a
reasonable amount
of
shock
and
vibration. How-
ever, like
any
other
fine
piece
of
precision equipment, care
should
be
exercised
to
avoid undue electrical
or
mechanical
abuse.
Momentary electrical overloads
of
500% should
not
usually
cause permanent damage. However,
after
an
accidental
overload
occurs
the
accuracy should
be
rechecked.
4.2
PERIODIC
MAINTENANCE
Model
880
Instruments should
be
checked periodically
for
calibration
accuracy.
The
time period between accuracy checks
is
flexible
and is
left
to the
discretion
of the
individual
to set
up
a
system
that
best
meets
his
needs.
4.3
PARTS
COMMON
TO
MODEL
880
VOLT
AND
WATTMETERS
Cover
assembly
0-005572
Case
assembly including handle 0-006190
Handle
assembly 10-860158
Lockwasher,
case
#6.,
1-110333
Stud Handle, mounting 1-114883
Screw,
case,
to
panel
1-131514
Screw,
cover, mounting
lower
1-131520
Screw,
cover, mounting upper 1-131494
Knob,
1-1/8"
long, wattmeter only
3-262871
Knob
Set
Screw, wattmeter only,
#8-32
x
3/8,
cone
point
1-111519
Binding
post,
all
metal
1/4-28
3-311642
Binding
post, phenolic black #10-32 1-117647
Hex
nut
brass
#10-32,
binding
post
mtg
1-111541
Terminal
#10
binding post
mtg
1-115568
Lockwasher
split
#10
binding
post
1-111854
Washer,
brass
flat #10
binding
post
mtg
1-111557
4-1
Maintenance
4.4
WARRANTY
All
instruments
in the
Simpson
Instrumentation
Products
Group
are
warranted
to the
original
purchaser
to
perform
ac-
cording
to
published specifications upon delivery,
and to be
free
from
defects
in
material
or
workmanship
for one
year
from
date
of
shipment. Within
this
period,
any
instrument
which
is re-
turned,
transportation
charges
prepaid,
to our
repair department
or one of our
authorized
service
agencies,
and
which
we
confirm
to be
defective, will
be
repaired
or
adjusted (or,
at our
option,
replaced)
without charge.
This warranty does
not
apply
to
tubes,
transistors
or
batteries,
nor
to
instruments which have been altered outside
of our
ser-
vice organization, operated
in an
abnormal manner,
or
abused.
This warranty
is
expressed
in
lieu
of all
other liabilities
ex-
pressed
or
implied.
We are not
liable
for
consequential
damage.
4.5
REPAIR
AND
CALIBRATION
Complete
facilities
are
maintained
at our
factory
for the
repair
and
calibration
of all
Simpson
instruments.
Service
is
also
available
for
most instruments
at the
Regional Service Centers
listed
on
back cover.
No
advance authorization
is
required
to
make
use of
repair
and
calibration service
at the
factory;
how-
ever,
Regional Service Centers should
be
notified
in
advance
of
shipment. Pack
the
equipment securely
and
ship prepaid.
It is
usually advisable
to
insure
the
shipment.
Enclose with
the
equipment
a
letter
containing:
1.
Detailed report
of
difficulty
encountered
or
calibration
requested.
2.
Purchase date.
3.
Indication whether estimate
is
required
before
work
is
done.
4.
Name
and
phone number
of
individual
to
contact should
we
have
a
question regarding your
request.
5.
Address
to
which
the
equipment
is to be
returned,
and ad-
dress
to
which
any
charges should
be
billed.
4-2
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