December 2015
Quick Start Installation Guide
7
Leveling Transmitters with Small Absolute or Differential
Pressure Spans
Mounting position of these transmitters is critical due to the smaller
transmitter spans.
To minimize these positional effects on calibration (zero shift), take the
appropriate mounting precautions that follow for the given transmitter
model.
See
Figure 5
for suggestions on how to level the transmitter using a spirit
balance.
To perform a
Zero Trim
after leveling, refer to
Trim the Transmitter
on
page 16
.
Figure 5: Using level to mount transmitter
For a model SMA810 or SMA845 transmitters, you must ensure that the
transmitter is vertical when mounting it. You do this by leveling the
transmitter side-to-side and front-to-back.
Mount transmitter vertically to assure best accuracy. Position a spirit
balance on pressure connection surface of AP body.
