Pepperl+Fuchs KFD2-UT2 Series Sil Safety Manual page 25

SAFETY MANUAL SIL KFD2-UT2-(EX)*, HID2082
Proof Test
Potentiometer Input
0 %
Zone 0, 1, 2
Div. 1, 2
Figure 4.8
The resistor values which are used to simulate the potentiometer shall be chosen
so that they represent the full scale value of the potentiometer when connected in
series. The individual resistors shall both be of the same resistance value and
have an accuracy of 1 %.
1. Connect two precision resistors in series.
2. Connect both open ends of the series resistors to the device (DUT) (channel I:
terminal 1 and 4, channel II: 7 and 8).
3. Connect the wiper input (channel I: terminal 5, channel II: terminal 6) to the
junction of the two simulation resistors.
4. Connect current meter/digital multimeter (DMM) to the current output
terminals 11 and 14 (channel I) and 12 and 15 (channel II).
5. Set the simulation resistor to 0 %, 50 % and 100 % of the potentiometer value
(see above).
6. Proof test is passed if the measured output values are within 2 % of the output
full scale. This means:
• 3.7 mA ... 4.3 mA, for 0 % of potentiometer value
• 11.7 mA ... 12.3 mA, for 50 % of potentiometer value
• 19.7 mA ... 20.3 mA, for 100 % of potentiometer value
Additionally the loop diagnosis shall be tested to prove that the fault signalling via
the current output is working correctly. The output current in the event of a failure
depends on the device configuration. Please record this configuration and the
resulting expected fault signalling current in the test report. Example: if downscale
is configured, 2.0 mA ±1 % must be measured in the event of a failure. The red
LED must be blinking.
50 % 100 %
1
2+
5-
4
7
3+
6-
8
Proof test set-up for HiD2082 (Potentiometer)
HiD2082
11+
14-
12+
15-
ERR 24 V DC
mA
mA
25