Filter
Top Products
Quick Installation Guide
00825-0100-4716, Rev DA
October 2009
Rosemount 3095 MultiVariable
17
STEP 6: TRIM THE TRANSMITTER
NOTE
Transmitters are shipped from Emerson Process Management fully calibrated and
configured for the application when C2 Option is ordered. Without C2 Option, configuration
will be by the factory default (span = upper range limit for F
OUNDATION fieldbus transmitters).
Zero Trim
A zero trim is a single-point adjustment used for compensating mounting position effects
and line pressure effects. When performing a zero trim, ensure the low side block valve is
closed, the equalize valve is open, the high side block valve is open, and all wet legs are
filled to the correct level.
Using the Field Communicator
1. Equalize the transmitter and connect Field communicator.
2. At the menu, input the Fast Key sequence.
3. Follow the commands to perform a zero trim.
4. Once the zero trim is complete, verify that the high side block valve is open, close the
equalize valve tightly, then open the low side block valve.
Using the Foundation Fieldbus AI Block
For zero errors greater than the allowable zero trim, compensate for the offset by using the
XD_Scaling, Out_Scaling and Indirect L_Type.
Using the Foundation Fieldbus Host System
Perform a Zero Trim method if the host system supports methods associated with the
TRANSDUCER 1400 block. Otherwise, if the host system does not support methods see
the 3095 Manual (00809-0100-4716).
NOTE
For Absolute Pressure (AP) Sensor: If open to atmosphere, reading should be at
atmospheric pressure (roughly 12 - 15 psi (0.8 - 1.0 bar), not zero. Use a barometer that is
four times as accurate as the 3095 AP sensor.
Fast Keys Steps
1, 2, 2, 1, 1 Trim DP Offset (Zero)
1, 2, 2, 1, 2 Trim SP Offset (Zero), (AP, GP)