Pepperl+Fuchs KFD2-SH-Ex1 - 5 Operation; Proof Test Procedure

Functional Safety KFD2-SH-Ex1(.T)(.OP), KHA6-SH-Ex1
Operation
2017-04
19
5Operation
Operating the device
1. Observe the safety instructions in the instruction manual.
2. Observe the information in the manual.
3. Use the device only with devices that are suitable for this safety application.
4. Correct any occurring safe failures within 8 hours. Take measures to maintain
the safety function while the device is being repaired.
5.1 Proof Test Procedure
According to IEC/EN 61508-2 a recurring proof test shall be undertaken to reveal
potential dangerous failures that are not detected otherwise.
Check the function of the subsystem at periodic intervals depending on the
applied PFD
avg
in accordance with the characteristic safety values. 
See chapter 3.4.
It is under the responsibility of the plant operator to define the type of proof test
and the interval time period.
Equipment required:
• Digital multimeter with an accuracy better than 0.1 %
For the proof test of the intrinsic safety side of the devices, a special digital
multimeter for intrinsically safe circuits must be used.
Intrinsically safe circuits that were operated with non-intrinsically safe circuits
may not be used as intrinsically safe circuits afterwards.
• Power supply set at nominal voltage of 24 V DC.
• Potentiometer 4.7 k.
• Resistor 220 /150 k.
•Resistor 1.3 k/0.5 W (.T(.OP) version only).
•Resistor 1 k/1 W.
Danger!
Danger to life from missing safety function
If the safety loop is put out of service, the safety function is no longer guaranteed.
• Do not deactivate the device.
• Do not bypass the safety function.
• Do not repair, modify, or manipulate the device.
Original InstructionsFunctional Safety KFD2-SH-Ex1(.T)(.OP), KHA6-SH-Ex1