6 Safety Manual
51
6.10.2 Proof test B
Step Action Please note
1 Disconnect all test piece connections.
Test the resistance between the following connections with an ohmmeter:
21 to 22: low-resistance, 0 Ω
21 to 23: high-resistance, ohmmeter overrun
22 to 23: high-resistance, ohmmeter overrun
Test piece is completely discon-
nected from the operating facili-
ty and without power supply.
Verification that there is no short
circuit in the area of connections
21 to 23 and 22 to 23.
2 Test the resistance between the following connections with an ohmmeter:
41 to 42: > 10 kΩ
Verification that there is no short
circuit in the area of the analog
output connection terminal.
3 Test the resistance between the following connections with an ohmmeter:
52 to 51: > 10 kΩ
53 to 51: > 10 kΩ
54 to 51: > 10 kΩ
53 to 52: > 10 kΩ
54 to 52: > 10 kΩ
54 to 53: > 10 kΩ
Verification that there is no short
circuit in the area of the mea-
surement input connection ter-
minal.
4 Connect short-circuit jumper between connection 41(+) and connection 42(-), re-
store energy supply connection and switch on test piece, configure test piece for
connection to RTD temperature probe sensor type in 4-wire connection and con-
figure analog output for current signal (4 mA to 20 mA; error signal: negative sig-
naling).
Connect current meter between connection 54(+) and 51(-) and measure the cur-
rent: 200 µA to 300 µA can be expected.
Verification that components
determining the current are OK.
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