PART THREE - OPERATION
SECTION 5 - ANALYZER CALIBRATION
Rev. 6-501
Model P53 pH/ORP Analyzer (universal-mount 1/2 DIN)
59
☞
1.
Immerse the sensor in the first pH buffer (preferably
pH 7).
Important: Allow the sensor and buffer tem-
peratures to equalize.
Depending on their temperature
differences, this may take 30 minutes or more.
2.
Press
MENU key
to display
&21),*85(
7(670$,17
(;,7
.
3.
With the “CALIBRATE” line selected, press
ENTER key
to display
.
4.
With the “SENSOR” line selected, press
ENTER key
to
display
.
5.
With the “2 POINT BUFFER” line selected, press
ENTER key
to display
. Use
×
×
or
Ø
Ø
key
to view the three states that the analog outputs
(and relays) can be in during calibration:
•
HOLD OUTPUTS:
Holds their present values.
•
XFER OUTPUTS:
Transfers to preset values.
•
ACTIVE OUTPUTS:
Responds to measured values.
With the desired choice displayed, press
ENTER key
to
enter this selection.
6.
With the sensor in the first buffer and the
screen displayed, press
ENTER key
to
confirm.
While the
screen is displayed, the
analyzer waits for the pH and temperature signals to
stabilize, measures the buffer value, and automatically
calibrates this point.
Thereafter, a screen like
appears for 5
seconds to confirm calibration of this point.
NOTE:
Any time the “PLEASE WAIT” screen appears
during calibration, you can manually complete
