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PART THREE - OPERATION
SECTION 5 - CONFIGURE MENU
Rev. 7-1201
Model P63 pH Analyzer
69
5.5 Selecting TEMP COMP
METHOD
After selecting “Temp Comp Method” from the CONFIGURE
menu, use the following submenu to configure the analyzer
for the desired temperature compensation method:
The screen settings are:
•
Type:
Selecting “300
Ω
NTC” sets the analyzer for use with
a 300 ohm NTC temperature element (used in all GLI
Differential Technique pH sensors -- except Model
6006P4-2000 pure water pH sensor systems which use a
Pt1000 RTD). Selecting “Pt100” or “Pt1000” respectively
sets the analyzer for use with a Pt1000 or Pt100 RTD
temperature element (used in most conventional combi-
nation pH electrodes).
Special Case: Select “Pt1000” when using a GLI Dif-
ferential Technique pH sensor and an external
Pt1000 temperature sensor for applications requiring
extremely high accuracy for temperature measure-
ment and compensation, or those in which the sensor
cable run is more than 2000 ft. (610 m).
•
Meas:
This setting affects measured pH readings. Select
“AUTO” when you want the measured temperature to
automatically compensate the pH reading. Select “MAN”
when you want to use a fixed temperature value to com-
pensate the pH reading, and enter that value in the Meas
“MAN Value” line. (This line is inaccessible if “AUTO” is
selected.)
•
Cal:
This setting affects temperature compensation for
calibration. Suppose you are using a GLI Differential sen-
sor and an external Pt1000 temperature sensor. The
sensor is placed in buffer for calibration. Now suppose the
Pt1000 is still in the process and at a different tempera-
ture than the buffer, resulting in a poor calibration. In this
case you should select “MAN”, measure the buffer tem-
perature with a thermometer, and enter that value in the
Cal “MAN Value” line. (This line is inaccessible if “AUTO”
is selected.) Select “AUTO” when the temperature sensor
can be in the buffer to sense its temperature. This applies
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