ABB STT04 - Page 17

ADDENDUM
15
PV Bias
The PV Bias calibration procedure allows
y
ou to ali
g
n the "zero" of the process with the "zero" readin
g
of the
transmitter. This ma
y
be done in one of two wa
y
s:
• Apply a pressure that corresponds to the desired zero offset or bias [SET PV ZERO]
• To scale to a value different from zero, calculate the offset or biasand apply it to the 600T EN [SET PV VAL]
Use the number ke
y
s to enter the current meter
readin
g
.
Use the number ke
y
s to enter the current meter
readin
g
.
Key Display Comments
This operation will cause a chan
g
e in output not cor-
respondin
g
to the input. Be sure the control loop is in
manual.
Select
YES
.
Key Display Comments
ENTER
4 mA CALIBRATION:
ENTER METER VALUE
n.nnnn
ENTER
20 mA CALIBRATION:
ENTER METER VALUE
nn.nnnn
ENTER
ID TAGNAME
READY
CALI-
BRATE
ENTER
OUTPUT WILL BE
AFFECTED! PROCEED?
NO
→
YES