Pepperl+Fuchs KFD2-UT2 Series - Page 21

SAFETY MANUAL SIL KFD2-UT2-(EX)*, HID2082
Proof Test
2011-09
21
Thermocouple Input (TC)
Figure 4.5 Proof test set-up for HiD2082 (TC)
Additional set up: 110 Ω fixed resistor
1. Connect TC simulator to the input terminals 2+ and 5- (channel I) and
3+ and 6- (channel II).
2. Connect current meter/digital multimeter (DMM) to the current output
terminals 11 and 14 (channel I) and 12 and 15 (channel II).
3. Set compensation/reference temperature in the simulator to 25 °C.
4. Connect a 110 Ω fixed resistor (0.1 % accuracy) to terminals 1 and 4
(instead of the special sensor for internal compensation).
5. Set the TC simulator sequentially to the temperature values
representing 4 mA, 12 mA, 20 mA and measure the output current.
6. Proof test is passed if the measured output values are within 2 % of the output
span. This means:
• 3.7 mA ... 4.3 mA
• 11.7 mA ... 12.3 mA
• 19.7 mA ... 20.3 mA
7. Remove the 110 Ω resistor from terminals 1 and 4, to check if the lead
breakage of the CJC is monitored. The red LED must be blinking. The output
behaviour in the event of a failure depends on the device configuration.
This test is also applicable if external compensation (setting of a fixed
compensation temperature in the module) is used in the application. Adapt
CJC value in the simulator during step 3 accordingly.
HiD2082
11+
14-
1
2+
5-
4
12+
15-
7
3+
6-
8
24 V DCERR
mA
mA
110Ω
TC
Sim.
Zone 0, 1, 2
Div. 1, 2
110Ω
TC
Sim.