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Rosemount 3150 Series
Reference Manual
00809-0100-4835 Rev BE
February 2018
33
Calibration
Coarse Zero Select Jumper
Position Selection Procedure
The coarse zero select jumper (see
) is shipped
from the factory in either the Nominal position or the position
required to obtain the calibration specified when ordered.
Changes to the factory calibration may require repositioning of
the jumper. To do this, follow the procedure below:
1. Calculate the % zero offset using the following
formula:
% Zero Offset = (LRV/URL) X 100
Where:
LRV = Lower Range Value of desired calibration
URL = Transmitter Upper Range Limit
jumper position.
3. If the jumper requires re-positioning, remove the
electronics housing cover opposite the “Field
Terminals” label. Remove the jumper by squeezing
the sides and pulling out. Reposition the jumper with
the arrow pointing to the typical position and carefully
push in. Ensure both jumper clips are fully engaged
and return to applicable calibration procedure.
If no change is required, return to applicable calibration
procedure.
NOTE
Typical jumper positions indicated in
are approximate. Position jumper as needed to achieve the
desired calibration.