68
Reference Manual
00809-0100-4107, Rev BA
Section 5: Operation and Maintenance
April 2013
All configuration changes should be monitored by a display or by measuring the loop output.
shows the physical differences between the two sets of buttons.
Figure 5-1. Local Configuration Button options
A. Local Operator Interface - green retainer
B. Digital Zero Trim- blue retainer
5.4.2
Determining calibration frequency
Calibration frequency can vary greatly depending on the application, performance
requirements, and process conditions. Use the following procedure to determine calibration
frequency that meets the needs of your application.
1.
Determine the performance required for your application.
2.
Determine the operating conditions.
3.
Calculate the Total Probable Error (TPE).
4.
Calculate the stability per month.
5.
Calculate the calibration frequency.
Sample calculation for Rosemount 2051
Step 1: Determine the performance required for your application.
Step 2: Determine the operating conditions.
Required Performance:
0.30% of span
Transmitter:
Rosemount 2051CD, Range 2 [URL=250 inH
2
O(623 mbar)]
Calibrated Span:
150 inH
2
O (374 mbar)
Ambient Temperature Change:
± 50 °F (28 °C)
Line Pressure:
500 psig (34,5 bar)
A
B
Содержание Rosemount 2051
Страница 2: ......
Страница 4: ......
Страница 102: ...92 Reference Manual 00809 0100 4107 Rev BA Section 6 Troubleshooting April 2013 Troubleshooting ...
Страница 213: ...203 Reference Manual 00809 0100 4107 Rev BA Appendix B Product Certifications April 2013 Product Certifications ...
Страница 214: ...204 Reference Manual 00809 0100 4107 Rev BA Appendix B Product Certifications April 2013 Product Certifications ...
Страница 227: ......