PART THREE - OPERATION
SECTION 5 - ANALYZER CALIBRATION
Rev. 6-501
Model P53 pH/ORP Analyzer (universal-mount 1/2 DIN)
61
1 POINT BUFFER Method
☞
This method is similar to the 2 POINT BUFFER method ex-
cept that only one buffer is used to calibrate one point. This
method also automatically recognizes buffers from the
buffer set you selected. Therefore, you must use a buffer
that matches a value in the buffer set. (See PART THREE,
Section 4.2 subheading “SELECT BUFFER Set for pH Cali-
bration” for details.)
NOTE:
When using a buffer that is not included in either of
the analyzer buffer sets, disregard this calibration
method. Instead, use only the “1 POINT SAMPLE”
calibration method.
1.
Immerse the sensor in the pH buffer.
Important: Allow
the sensor and buffer temperatures to equalize.
De-
pending 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.
Use
Ø
Ø
key
to select the “1 POINT BUFFER” line and
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.
