Advanced Operations

Figure 54 shows the behavior of the relay in the alarm mode under different conditions.

Figure 54 Relay behavior—Alarm mode

1

High alarm

5

ON delay when phase=reverse

 

 

 

OFF delay when phase=direct

 

 

 

 

2

High deadband

6

OFF delay when phase=reverse

 

 

 

ON delay when phase=direct

3

Low deadband

7

Time (x-axis)

 

 

 

 

4

Low alarm

8

Source (y-axis)

 

 

 

 

Table 27 Color/line code for Figure 54

Selected source

Relay contact (phase reverse)

Relay contact (phase direct)

89

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Hach sc1000 user manual Relay behavior-Alarm mode, Color/line code for Figure