User's Manual
Reference
Manual
00809-0100-4045,
Rev
01
Operation and
Maintenance
December
2015
Operation and Ma
int
e
n
a
n
c
e
25
Zero
trim
is a si
ngl
e
-
p
oi
n
t
o
f
fse
t
a
d
j
ust
me
n
t
.
It
is useful
for
c
ompe
n
sa
t
i
n
g for
mo
un
ti
ng
position
e
ff
ec
t
s
and is
most
e
ff
ec
t
iv
e
when
performed with
t
h
e
device installed
in
i
t
s
final
mounting position.
Since
this
c
o
rr
ec
t
i
on
m
a
i
n
t
a
in
s
t
h
e
slope
of the
c
h
arac
t
e
r
i
za
ti
on curve,
it
should
not
be
used
in
place
of
a sensor
trim
over
the full
sensor
range.
When
performing
a zero
trim,
ensure
that
t
h
e
equalizing valve is open and all
w
e
t
legs
are
filled
to
the
c
o
rr
ec
t
levels. Line pressure should be applied
to
the
device
during
a zero
trim
to
e
l
im
ina
t
e
line
pressure errors. Refer
to “Manifold
ope
r
a
t
io
n
”
on
page
20.
Note
Do
not
perform
a zero
trim on
t
h
e
Wireless Pressure Gauge
with
absolute me
a
s
ure
m
e
n
t
t
y
pe
.
Zero
trim
is zero based, and absolute pressure devices reference absolute zero.
To
c
o
rrec
t
m
oun
t
i
ng position
eff
ec
t
s
on
a Wireless Pressure Gauge
with absolute
me
a
s
ure
m
e
n
t
t
y
pe
,
perform
a
low
trim
within the
sensor
trim
f
un
c
t
i
o
n
.
The
low
tr
im
function
provides an o
ff
s
e
t
c
o
rr
ec
t
i
o
n
similar
to
the
zero
trim
function,
but
it
does no
t
require zero-based
input.
Sensor
trim
is a
two-point
sensor
ca
li
bra
t
io
n
where
two
e
n
d-poin
t
pressures are
applied,
a
n
d
all
output
is linearized
be
t
w
ee
n
them.
Always adjust
t
h
e
low
trim
value
f
i
r
s
t
to
establish
t
h
e
c
o
rr
ec
t
of
f
s
et
.
Ad
j
u
s
t
m
e
nt
of
t
h
e
high
trim
value provides a slope
c
o
rr
ec
t
i
o
n
to
t
h
e
char-
ac
t
e
ri
zation
curve based
on the low
trim
value. The
trim
values
allow you
to o
p
t
i
m
i
z
e
performance over
your
specified measuring range
a
t
the
calibra
t
ion
t
e
mpe
r
a
t
ure
.
During
a
trim
ope
r
a
t
io
n,
the
device is placed
in high power
refresh
mode, which pro
v
i
d
e
s
frequen
t
pressure me
a
s
ure
m
e
n
t
upd
a
t
e
s.
This behavior allows
for more accurate
ca
li
bra
t
io
n
of
t
h
e
device. When
the
device is
in high power
refresh
mode, the
ba
tt
e
r
y
power
supply
will be
de
ple
t
ed
more rapidly.
Figure
4-1.
Sensor Trim
Example
A
A
B
B
A. Before
t
r
i
m
B.
A
f
t
e
r
t
r
im