Rev
B
MN301530
11
of
14
FLOW
SWITCH
CALIBRATION
Step
Eight
Set
Points:
If
the
preset
factory
calibration
is
not
adequate
for
your
application,
follow
the
calibration
steps
listed
below.
Note:
the
switch's
internal
LED
will
be
on
when
the
switch
detects
no
‐
flow
and
will
off
when
the
switch
detects
flow.
1.
Install
the
fitting
and
flow
switch
as
described
in
the
Installation
section
of
this
manual.
Turn
the
flow
switch
and
controller
power
on
and
adjust
the
flow
rate
to
the
application
setting.
If
the
medium
to
be
sensed
is
likely
to
be
subject
to
high
temperature
variations,
the
flow
switch
should
be
set
at
the
highest
normal
temperature
likely
to
be
encountered.
2.
Locate
the
potentiometer
knob
at
the
top
of
the
flow
switch.
The
red
LED
is
visible
through
the
potentiometer.
(If
the
LED
is
on,
slowly
adjust
the
potentiometer
counterclockwise,
with
a
small
flat
head
screwdriver
until
the
LED
turns
off.)
The
adjustment
is
a
single
turn
270°
potentiometer.
The
initial
response
time
of
the
flow
switch
after
adjustment
is
1
to
10
seconds.
Adjust
the
potentiometer
in
slow
increments
and
wait
for
the
response.
If
the
LED
is
off,
slowly
adjust
the
potentiometer
clockwise
until
the
light
turns
on.
Then
turn
the
potentiometer
counterclockwise
to
bring
the
LED
off
at
a
reliable
setting.
Remember,
adjust
the
potentiometer
in
slow
increments
and
wait
for
the
response.
3.
Verify
that
the
new
calibration
is
correct
by
lowering
the
system
flow
rate
below
the
set
point
and
check
to
see
that
the
red
LED
turns
on.
Then
increase
the
flow
rate
above
the
set
point
and
verify
that
the
red
LED
turns
off
accordingly.
Liquid
Switch
FT10
‐
_
_
_
5
or
FT10
‐
_
_
_
2
Series
Gas
Switch
GT10
‐
_
_
_
5
or
GT10
‐
_
_
_
2
Series
