Rosemount 4500, Reference Manual

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Reference Manual
00809-0100-4027, Rev AA
December 2005
4-7
Rosemount 4500
NOTE
Select pressure input values so that low and high values are equal to or
outside the 4 and 20 mA points. Do not attempt to obtain reverse output by
reversing the high and low points. The transmitter allows approximately five
percent URL deviation from the characterized curve established at the factory.
4. Follow the commands provided by the HART Communicator to complete
the adjustment of the lower value.
5. Repeat the procedure for the upper value, replacing 2: Lower sensor trim
with 3: Upper sensor trim in Step 3.
AMS
Right click on the device and select “Calibrate,” then “Sensor trim” from the
menu
.
1. Select “Lower sensor trim.”
2. Click Next after setting the control loop to manual.
3. Click Next after applying appropriate pressure to sensor.
4. Select Next to acknowledge the loop can be returned to automatic
control.
5. Select Finish to acknowledge the method is complete.
6. Right click on the device and select “Calibrate,” select “Sensor trim” from
the menu
.
7. Select “Upper sensor trim” and repeat steps 2-5.
Recall Factory Trim
The Recall Factory Trim commands allow the restoration of the as-shipped
factory settings of the sensor trim and analog output trim.
Recall Factory Trim—
Sensor Trim
This command resets the transmitter sensor trim to the “as shipped” factory
settings. The Recall Factory Trim—Sensor Trim command can be useful for
recovering from an inadvertent zero trim of an absolute pressure unit or
inaccurate pressure source.
AMS
Right click on the device and select “Calibrate,” then “Recall Factory Trim”
from the menu
.
1. Click Next after setting the control loop to manual.
2. Select “Sensor trim” under “Trim to recall” and click Next .
3. Click Next to acknowledge restoration of trim values is complete.
4. Select Next to acknowledge the loop can be returned to automatic
control.
5. Select Finish to acknowledge the method is complete.
Fast Keys
1, 2, 3, 4, 1