2. Mode - pushbuon adjustments
a. Auto - red LED
b. pH standby - green LED
c. ORP1 standby - yellow LED
d. ORP2 standby - yellow LED
e. Temp display & calibrate - green LED
f. OFF mode - In standby, press and hold Mode buon for 3
seconds to turn controller o. There is sll power to the
controller in this mode, but no dosing will occur. Press and
hold to turn the controller back on.
3. Up/Down Arrows - pushbuon adjustments of following:
• Set Level
• Dose Time
• Delay Time
• Over Timer
• High Alert
• Low Alert
• pH Cal
4. Flow - green LED
5. Tank 1 - red LED
6. Tank 2 - red LED
7. Electrical Connecons (peripherals)
a. pH output (le receptacle) - max. 3.3 amps @ 110/230 VAC
max
b. ORP1 output (center receptacle)- max. 3.3 amps @
110/230 VAC max
c. ORP2 output (right receptacle) - max. 3.3 amps @ 110/230
VAC max
d. AC power - 120 VAC/240 VAC, 50-60 Hz
e. AC power protecon - Fused at .500 amps (500mA)
f. Flow - from ow cell
g. Tank 1 - from tank level switch (oponal)
h. Tank 2 - from tank level switch (oponal)
9
M820 pH/Dual ORP Controller Owner’s Manual