M790 pH/ORP Controller Owner's Manual
Figure 2: M790 Controller Components Connections
E. Controller Panel Descriptions
1. Digital Displays and Function LEDs
a. pH
1. Alert - red LED
2. Dose - green LED
b. ORP
1. Alert - red LED
2. Dose - yellow LED
pH
ORP
8
Controller Communication
digital display
pushbutton
LEDs
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