3
2.2 SETTING UP THE DUAL-RELAY OPTION BOARD
You may enter a setpoint from -99999 to 999999 with a decimal point in any of the following
positions: 9.9.9.9.9.9. After applying the scale factor and offset, the displayed measurement is
compared to the setpoint values.
LO ALARM
Displayed value is less than Setpoint LO
HI ALARM
Displayed value is more than Setpoint HI
HYSTERESIS
Relay 2 is energized when display value is more than Setpoint HI. Relay 2 is not
energized when display value is less than Setpoint LO
Setpoint Example:
Setpoint HI is 500.0 and Setpoint LO is 100.0.
Reading changes from 0 to 600 and back to 0.
Figure 10-2 on the following page illustrates Table 2-1.
Table 2-1. Setpoint Example
Alarm Status
Reading
LO (Relay 1)
HI (Relay 2)
HYS
0
On
Off
Off
99.9
Off
Off
Off
300
Off
Off
Off
500.0
Off
Off
Off
500.1
Off
On
On
600
Off
On
On
500.1
Off
Off
On
100 - 500
Off
Off
On
99.9
On
Off
Off
0
On
Off
Off
2
