Maintenance
19
5.
Add
coolant
directly
into
the
coolant
tank,
if
required.
Figure 6 Coolant Level
s
6.
Check
the
color
of
the
coolant.
The
coolant
should
be
a
clear
light
yellow
color.
If
not,
it
is
contaminated
and
should
be
replaced.
7.
Replace
coolant,
if
required.
a.
Pick
up
the
attenuator
and
carefully
pour
out
the
coolant
into
a
suitable
container.
Allow
as
much
to
drip
out
as
possible.
b.
Replace
the
coolant
with
fresh
coolant,
filling
the
radiator
tank
to
the
proper
level.
8.
Install
the
output
end
cover.
See
Storage
If
storing
the
attenuator
for
a
long
period
of
time,
cover
the
equipment
to
keep
out
dust
and
dirt.
Store
this
unit
in
a
dry
and
dust
free
environment
where
the
ambient
temperature
will
remain
within
the
‐
40°C
to
+45°C
(
‐
40°F
to
+113°F)
working
range
of
the
equipment.
CAUTION
Do
not
overfill
the
coolant
tank
with
coolant.
Room
must
be
allowed
for
expansion
of
the
heated
coolant.
