75
10.4.3 Testing
Make the safe- and hazardous-area connections shown in figure 10.7 and carry out the
following procedure:
a Set the current source or sink to 12mA
b Adjust each trip potentiometer until the associated LED just
extinguishes.
c With sources of 11.5mA and 12.5mA carry out the following
checks:
Table 10.5
Current High alarm Low alarm
Relay Relay
LED 11 - 12
8 - 9
10 - 11
7 - 8
LED 11 - 12
8 - 9
10 - 11
7 - 8
11.5mA On closed open Off open closed
12.5mA Off open closed On closed open
Figure 10.7: Test circuit for MTL5314
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