If the ORP that's being read is continuously on the extremes of the scale
(~ -900mV or
+900mV)
calibration may have to be done more often. The exact frequency of calibration
will have to be determined by your engineering team.
Single point calibration
Remove the soaker bottle and rinse off the ORP probe. Insert the ORP probe directly into
the
225mV
calibration solution bottle, and let the probe sit in the calibration solution until
the readings stabilize
(small movement from one reading to the next is normal)
.
Send
342.0
315.2
268.7
240.1
240.1
240.1
240.1
cal,225
*OK
225.0
225.0
Unstabilized
Stabilized
Once the readings have stabilized,
issue the calibration command.
In this case
"cal,225"
Calibration should be done at least once per year
10 − 60 sec
10 − 60 sec
10 − 60 sec
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