EZO pH Circuit - Datasheet

Mid point calibration
Single, Two point, or Three point calibration
No calibration Single point calibration
Three point calibration
Two point calibration
Mid point
Mid pointMid pointLow point Low point High point
14
Two point calibration will provide high accuracy
between 7.00 and the second point calibrated
against, such as a 4.00.
Three point calibration will provide high accuracy
over the full pH range. Three point calibration
at 4.00, 7.00 and 10.00 should be considered
the standard.
The first calibration point must be the Mid point (pH 7.00)
Remove the soaker bottle and rinse off the pH probe. Remove the top of the pH 7.0 0
calibration solution pouch. Place the pH probe inside the pouch and let the probe sit
in the calibration solution until the readings stabilize (small movement from one reading
to the next is normal).
Send
6.917
7.126
7.223
7.225
7.225
7.225
7.225
cal,mid,7
*OK
7.000
7.000
Unstabilized
Stabilized
1 − 2 mins
ASPH7P
ASPH7P
After
Calibration
After 20 mins, the calibration solution inside an
open pouch is no longer considered accurate.
Dispose of the unused solution, after calibration.
Once the readings have stabilized, issue the
Mid point calibration command. "cal,mid,7"