Owner manual

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 213

Appendix

Engineering Unit Code Numbers

Code Number Details

This table maps engineering unit code numbers to their meaning and

abbreviations. These codes are used in the process variable range display.

Unit Codes Description from HART Specification Abbreviated Units

1 inches of water at 20 °C (68 °F) inH2O (20 °C or 68 °F)

2 inches of mercury at 0 °C (32 °F) inHg (0 °C or 32 °F)

3 feet of water at 20 °C (68 °F) ftH2O (20 °C or 68 °F)

4 millimeters of water at 20 °C (68 °F) mmH2O (20 °C or 68 °F)

5 millimeters of mercury at 0 °C (32 °FC mmHg (0 °C or 32 °F)

6 pounds per square inch psi

7 bars bar

8 millibars mbar

9 grams per square centimeter g/square cm

10 kilograms per square centimeter kg/square cm

11 pascals Pa

12 kilopascals kPa

13 torr torr

14 atmospheres atm

15 cubic feet per minute cubic ft/min

16 gallons per minute usg/min

17 liters per minute L/min

18 imperial gallons per minute impgal/min

19 cubic meter per hour cubic m/h

20 feet per second ft/s

21 meters per second m/s

22 gallons per second usg/s

23 million gallons per day million usg/d

24 liters per second L/s

25 million liters per day ML/day

26 cubic feet per second cubic ft/s

27 cubic feet per day cubic ft/d

28 cubic meters per second cubic m/s

29 cubic meters per day cubic m/d

30 imperial gallons per hour impgal/h