Functional Safety KF**-CRG2-(Ex)1.D
Operation
2017-12
17
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
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.
Check the settings after the configuration by suitable tests.
Equipment required:
• Digital multimeter with an accuracy of 0.1 %
Use for the proof test of the intrinsic safety side of the device a special digital
multimeter for intrinsically safe circuits.
If intrinsically safe circuits are operated with non-intrinsically safe circuits, they
must no longer be used as intrinsically safe circuits.
• Power supply set to nominal voltage
• Load resistor i. e. 220 , 150 mW
• Simulate the sensor state by a NAMUR sensor simulator for 4 mA to 20 mA
signals. This simulator must also be capable to signal faults
(i. e. with 2.0 mA or 21.5 mA).
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.
Functional Safety KF**-CRG2-(Ex)1.D
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