Endress+Hauser Proline Prosonic Flow P 500 Functional Safety Manual page 13

Proline Prosonic Flow P 500 HART
4.2.2 Useful lifetime of electric components
The established failure rates of electrical components apply for a useful lifetime of 12 years as
per IEC 61508-2: 2010, section 7.4.9.5, note 3.
The device' s year of manufacture is coded in the first character of the serial number (→ table
below).
Example: serial number L5ABBF02000 → year of manufacture 2016
ASCII character
D
E
F
H
J
4.2.3 Suitability of the measuring device
1. Carefully select the frequency of the sensor set in accordance with the application' s
expected flow rates.
 The maximum flow rate during operation must not exceed the specified maximum
value for the sensor.
2. In safety-related applications, it is advisable to select the limit value for monitoring a
minimum flow such that this limit is at least twice the smallest specified flow that can
still be measured, with the actual medium.
 For further information, see the Technical Information
3. The sound velocity of the medium must be in the 600 to 2 100 m/s range.
4. The additional measuring uncertainties in the event of an error apply for
Reynolds numbers > 10000. SIL mode is not recommended for
Reynolds numbers < 10000.
Endress+Hauser
Meaning ASCII character
2010 K
2011 L
2012 M
2013 N
2014 P
Meaning ASCII character
2015 R
2016 S
2017 T
2018 V
2019 W
Safety function
Meaning
2020
2021
2022
2023
2024
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