Rosemount 4500
Reference Manual
BASIC SETUP
Set Process Variable Units
Fast Keys | 1, 3, 2 |
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Rerange
The PV Unit command sets the process variable units to allow you to monitor your process using the appropriate units of measure.
HART Communicator
Enter the fast key sequence for “Set Process Variable Units.” Select from the following engineering units:
• | inH2O | • | bar | • | torr |
• | inHg | • | mbar | • | atm |
• | ftH2O | • | g/cm2 | • | MPa |
• | mmH2O | • | kg/cm2 | • inH2O at 4 °C | |
• | mmHg | • | Pa | • mmH2O at 4 °C | |
• | psi | • | kPa |
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AMS
Right click on the device and select “Configuration Properties” from the menu. In the Basic Setup tab, use “Unit” drop down menu to select units.
The Range Values command sets the 4 and 20 mA points (lower and upper range values). In practice, you may reset the transmitter range values as often as necessary to reflect changing process conditions. Changing the lower or upper range point results in similar changes to the span.
NOTE
Transmitters are shipped from Rosemount Inc. fully calibrated per request or to the factory default of full scale (span = upper range limit.)
Use one of the methods below to rerange the transmitter. Each method is unique; examine all options closely before deciding which method works best for your process.
•Rerange with a HART Communicator only.
•Rerange with a pressure input source and a HART Communicator.
•Rerange with a pressure input source and the local zero and span buttons (option D1).
•Rerange with AMS only.
•Rerange with a pressure input source and AMS.
NOTE
If the transmitter security switch is ON, adjustments to the zero and span cannot be made. Refer to “Set Switches” on page
