Safety manual vegapuls series 60 4 … 20 ma/hart radar.
Contents 1 functional safety 1.1 in general . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.3 instrument parameter adjustment . . . . . . . . . . . 7 1.4 setup . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
1 f unctional safety 1 .1 in general this safety manual applies to measuring systems consisting of the vegapuls series 60 radar sensor in two-wire and four- wire versions 4 … 20 ma/hart: vegapuls 61, 62, 63, 65, 66, 67, 68 valid hardware and software versions: serial number of the electronics sensor...
λ dd rate for dangerous detected failure λ du rate for dangerous undetected failure dc s diagnostic coverage of safe failures; dc s = λ sd /(λ sd + λ su ) dc d diagnostic coverage of dangerous failures; dc d = λ dd /(λ dd + λ du ) fit failure in time (1 fit = 1 failure/10 9 h) mtbf mean time between...
According to iec 61511-1, paragraph 11.4.4, the failure tolerance hft can be reduced by one for proven-in-use subsystems if the following conditions are met: l the instrument is proven in use l only process-relevant parameters can be modified on the instrument (e.G. Measuring range, current output in...
If the internal diagnosis system detects a failure, the measuring system goes into fault mode. A dangerous undetected failure exists if the measuring system switches neither to the defined safe condition nor to the failure mode when the process requires it. If the measuring system delivers output cur...
The following assumptions form the basis for the implemen- tation of fmeda: l failure rates are constant, wear of the mechanical parts is not taken into account l failure rates of external power supplies are not taken into account l multiple errors are not taken into account l the average ambient te...
In the adjustment software, the parameter "sensor according to sil" must be selected in the menu level "basic adjustment". If the indicating and adjustment module is used, the parameter "sil" must be actived in the menu level "service". The parameter adjustment of the interference current influen- ce...
1 .4 setup take note of the mounting and installation instructions of the operating instructions manual. In the setup procedure, a check of the safety function by means of an initial filling is recommended. 1 .5 reaction during operation and in case of failure the adjustment elements or device parame...
The test must be carried out in a way that verifies the flawless operation of the safety functions in conjunction with all system components. This is ensured by a controlled reaching of the response height during filling. If filling up to the response height is not possible, then a response of the measu...
Dc d 75 % mtbf = mttf + mttr 0.45x10 6 h vegapuls 61, 62, 63 e 013 (no measured value available) 2 … 20 min depending on the application e 042/e043 (hardware error) 2 min e 036/e037 (no executable sensor software) 25 h vegapuls 65, 66 e 013 (no measured value available) 2 … 8 min depending on the ap...
Pfh 0.358x10 -6 /h the chronological sequence of pfd avg is nearly linear to the operating time over a period up to 10 years. The above values apply only to the t proof interval after which a recurring function test must be carried out. 1 5 10 t proof pfd avg 1 2 3 4 fig. 1: chronological sequence o...
Vegapuls series 60 - 4 … 20 ma/hart 13 functional safety 31338 - en -070510
14 vegapuls series 60 - 4 … 20 ma/hart functional safety 31338 -en -070510
Vegapuls series 60 - 4 … 20 ma/hart 15 functional safety 31338 - en -070510
Vega grieshaber kg am hohenstein 113 77761 schiltach germany phone +49 7836 50-0 fax +49 7836 50-201 e-mail: info@de.Vega.Com www.Vega.Com iso 9001 all statements concerning scope of delivery, application, practical use and operating conditions of the sensors and processing systems correspond to the...
