User's Manual
Operation and
Maintenance
December
2015
Reference
Manual
00809-0100-4045,
Rev
01
24
Operation and Maintenance
Table
4-1.
Recommended Calibration
Tasks
Measurement
type
Ta
s
k
s
Gage
Compound
Vacuum
1.
R
ec
o
n
f
igu
r
e
parameters
if necessary.
2.
Zero
trim the
device
to
c
ompe
n
sa
t
e
for mounting
e
ff
ec
t
s
or
sta
t
ic
p
r
e
s
sur
e
ef
f
ec
t
s.
3.
Op
t
i
onal
:
P
e
r
f
o
r
m
a sensor
trim.
(A
cc
ur
a
t
e
pressure source
required.)
Ab
so
l
u
t
e
1.
R
ec
o
n
f
igu
r
e
parameters
if necessary.
2.
P
e
r
f
o
r
m
low trim
value
sec
t
i
o
n
of the
sensor
trim
procedure
to
c
o
rr
ec
t
f
o
r
mo
un
t
i
ng position
eff
ec
t
s.
3.
Op
t
i
onal
:
P
e
r
f
or
m
a sensor
trim if equipm
e
n
t
available (accura
t
e
absol
u
t
e
pressure source required), o
t
he
r
w
i
s
e
perform the low trim
value
sec
t
io
n
of
t
h
e
sensor
trim
procedure.
Note
For devices
with
absolute measurement
t
y
p
e
,
an accurate absolute pressure source
i
s
required.
4.3.1
D
e
t
e
r
mining
necessary sensor
tr
ims
Bench
ca
li
bra
t
io
ns
allow for
ca
li
bra
t
ing the instr
u
me
n
t
for
i
t
s
desired range
of
ope
r
atio
n.
S
t
ra
igh
t
forward
c
o
nn
ec
t
i
on
s
to
pressure source
allow for
a
full
ca
li
bra
t
i
o
n
a
t
the planned
ope
r
a
t
ing points.
Exercising
the
device over
the
desired pressure range allows
f
o
r
verification
of
t
h
e
output
value. “Sensor
trim”
on
page 26 discusses
how the trim
ope
r
a
t
io
ns
change
the
ca
li
bra
t
ion
.
It
is possible
to
degrade
the
performance
of the
device
if
a
trim is
done
improperly or with in
acc
u
ra
t
e
equipment.
The device can be
se
t
back
to
fac
t
or
y
s
e
tt
ing
s
using
t
h
e
Recall
F
a
c
t
o
r
y
Trim command in
“Recall
fac
t
or
y
trim—sensor
trim”
on
page
27.
For devices
that
are
field
installed,
the
manifolds discussed
in “Manifold
ope
r
a
t
i
o
n
”
on
page
20
allow
the
device
to
be zeroed using
t
h
e
zero
trim function.
This
field
ca
li
bra
t
ion
wil
l
eliminate
any pressure offsets caused
by
m
o
un
t
i
n
g
effe
c
t
s
(head
ef
f
ec
t
of
t
h
e
oil fill) and
sta
t
ic
pressure e
ff
ec
t
s
of the
pr
oc
e
s
s.
Determine the
necessary
t
r
i
m
s
with the following steps.
1.
Apply pre
s
sure
.
2.
Check pressure.
If the
pressure does
not
m
a
t
c
h
the
applied pressure,
perform a
dig
i
t
a
l
zero
trim.
See “Sensor
trim”
on
page
26.
4.3.2
Sensor
trim overview
A sensor
trim
c
o
rrec
t
s
the
pressure o
f
fse
t
and pressure range
to
m
a
t
c
h
a pressure
standard.
The upper sensor
trim
c
o
rrec
t
s
the
pressure range and
the lower
sensor
trim
(zero
tr
im)
c
o
rrec
t
s
the
pressure o
f
fse
t
.
An accurate pressure standard is required
for full
ca
li
bra
t
io
n.
A
zero
trim
can be
performed if
t
h
e
process is
v
e
n
t
e
d
.