f. Press the Mode pushbuon momentarily to place the
controller into the pH standby mode. The green pH standby
LED will illuminate. Select the desired pH set level and dose
me (connuous or med). Please call us at 877-693-6903
for assistance with inial sengs.
g. While sll in the pH standby mode, press the pH Cal
pushbuon to calibrate the reading to the value observed
through the manual tesng of the water. Note: Always
calibrate using water from the sample port of the ow
cell.
h. Press the Mode pushbuon momentarily to place the
controller in ORP1 standby mode. The yellow ORP1
standby LED will illuminate. Select the desired ORP1 set
level and dose me (connuous or med). Please call us at
877-693-6903 for assistance with inial sengs.
i. Press the Mode pushbuon momentarily unl the red
Auto LED is illuminated. Note: If pH level in the pool is at
desired set level and chlorine/bromine level is at desired
PPM level in the pool, then the ORP set level should be
the same as the current ORP reading when in Auto Mode.
2. Shutdown
Note: Each me the Mode pushbuon is momentarily pressed,
the mode will cycle from Auto to pH to ORP1 to ORP2, Temp, and
then return to Auto mode.
a. Press the Mode pushbuon momentarily to place the
controller in pH standby mode. The green pH standby LED
will illuminate, and both the pH and ORP digital displays
will show dashes.
b. Press and hold the Mode pushbuon for 2 seconds unl
both the pH and ORP digital displays read OFF.
c. Release the Mode pushbuon. The M820 controller will
turn o, and the digital displays and funcon LEDs will go
blank. The green Flow LED will be illuminated if water is
owing through the ow cell.
16
M820 pH/Dual ORP Controller Owner’s Manual
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