Project planning – KROHNE TT 51 SERIES EN User Manual
Page 10
5
PROJECT PLANNING
10
TT 51 SERIES
www.krohne.com
09/2010 - 4000869801 - AD TT 51 SIL R01 en
Project planning
5.1 Applicable device documentation
5.2 Project planning, behaviour during operation and malfunction
• Under normal conditions the useful operating lifetime is 10 years (8...12 years).
• Requirements made in the handbook have to be kept.
• Repair and inspection intervals are based on safety calculation.
• For repairs or recalibration of the SIL transmitter, use the original or a suitable secure
packing, include a properly filled out return form (see Appendix) and send the device to the
manufacturer for service.
Note: It is of vital importance that all type of failures of the equipment are reported to the
manufacturer in order to make it possible for the company to make corrective actions and
prevent systematic errors.
• The owner of hazardous waste is responsible for disposal of it. However all transmitter
produced by the manufacturer are free from any hazardous materials.
• Modifications made without specifically authorization of the manufacturer are strictly
prohibited.
5.2.1 SIL data
• Measurement accuracy in SIL mode: a hardware error influencing the measured value will
result in a system error signal if the measured signal deviates more than 2% of selected input
span
• System Error Detection Time: < 5 min (for a complete software check running in background
when SIL is activated)
• Update times for input signals change, with filter set to default value 4 and SIL-switch on: 1
input channel: < 2 s
• Update times for input signals change, with filter set to default value 4 and SIL-switch on: 2
input channels: < 3 s
• Minimum supply needed for system safety functions to work properly: ≥ 15 VDC
[D1]
TT 51 series - Technical Datasheet: 2-wire transmitter for temperature, resistance or voltage
measurement
Reference: 08/2010 - 4000869702 - TD TT51 R02 en
[D2]
TT 51 series - Handbook: 2-wire transmitter for temperature, resistance or voltage
measurement
Reference: 08/2010 - 4000754201 - MA TT51 R01 en
[D3]
exida FMEDA report: KROHNE 09/12-72 R011
.book Page 10 Thursday, September 9, 2010 4:19 PM