Emerson Rosemount 2051 Reference Manual page 68

Operation and Maintenance
March 2024
3. Calculate total probable error (TPE).
4. Calculate the stability per month.
5. Calculate calibration frequency.
Sample calculation for Rosemount 2051C with P8 option (0.065%
accuracy & 5-year stability)
Procedure
1. Determine the performance required for your application.
2. Determine the operating conditions.
3. Calculate total probable error (TPE).
(1) Zero static pressure effect removed by zero trimming at line pressure.
68
Transmitter: 2051CD, Range 2 [URL=250 inH
Calibrated span: 150 inH
Ambient temperature change: ± 50 °F (28 °C)
Line pressure: 500 psig (34,5 bar)
TPE =
of span
Where:
Reference Accuracy = ± 0.075% of span
Ambient Temperature Effect =
Span Static Pressure Effect
maximum span
Required Performance: 0.30% of span
Transmitter: 2051CD, Range 2 [URL=250 inH
Calibrated span: 150 inH
Ambient temperature change: ± 50 °F (28 °C)
Line pressure: 500 psig (34,5 bar)
TPE =
of span
O(623 mbar)]
2
O (374 mbar)
2
(1) = 0.1% reading per 1000 psi (69 bar) = ±0.05% of span at
O(623 mbar)]
2
O (374 mbar)
2
Reference Manual
00809-0100-4101
= 0.189 %
= 0.185 %
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