Rosemount 3095 - Page 56

Rosemount Model 3095 Multivariable
™
Level Controller
4-14
Time Limit This selection sets the maximum time allowed for the autotuning
procedure to complete. If tuning does not complete within this time
frame, tuning will cease and a message is displayed indicating that
tuning failed. The unit returns to the previous mode of operation.
Factory Default: 0 minutes
Valid Range: 0 to 1,000 minutes
Overshoot This selection sets a tolerance above and below the Tuning Lo Limit
and Tuning Hi Limit. When the level strays out of the tolerance, tuning
ceases and indicates which boundary was exceeded.
This value is entered in level units.
Factory Default: 0
Valid Range: 0 to 25 inches
Perform Auto Tune This procedure must be followed for the actual autotuning calculations
to occur.
1. Enter the Perform Auto-Tune menu.
2. Select “Yes” from Start Auto-Tune Yes/No
3. The HART Communicator displays the level value and
tuning state.
When the tuning process completes the HART Communicator
displays “Complete”.
Should the level process go beyond the tune level limits plus
overshoot or go beyond the time-out period, the tuner will abort
and display a "Tuning Aborted" message.
Accept Auto Tune The calculated autotuning parameters will not be in effect until you
“accept” them.
Once the autotuner completes successfully, the calculated tuning
parameters may be viewed. [6, 2, 4]
If the calculated values are acceptable, you may accept the tuning
parameters (gain, reset and rate), or the bias, or both on the Accept
Auto-Tune menu.
Once the system has been autotuned the Alpha parameter may be
revised (refer to page 4-13) and new tuning parameters will be
calculated. The new tuning parameters may then be reviewed and
accepted.
HART Comm.
6, 2, 4, 3, 5
HART Comm.
6, 2, 4, 3, 4
HART Comm.
6, 2, 4, 4
HART Comm.
6, 2, 4, 5