Emerson Rosemount 1057 Instruction Manual page 47

Instruction Manual
LIQ-MAN-1057
6.4.12 Custom Setup
The display screens for creating a Custom Curve for converting conductivity to
concentration is shown. Refer to configuring contacting measurements flow
diagram
When the custom curve data entry is complete, press ENTER. The display
confirms the determination of a custom curve fit to the entered data by
displaying this screen:
If the custom curve fit is not completed or is unsuccessful, the adjacent screen
appears and the screen returns to the beginning custom curve screen.
6.4.13 Cal Factor
Upon initial installation and power up, if 4-electrode was selected for the sensor type in the Quick Start
menus, the user enters a Cell Constant and a Cal Factor using the instrument keypad.
The cell constant is needed to convert measured conductance to conductivity as displayed on the
analyzer screen. The Cal Factor entry is needed which increases the accuracy of the live conductivity
readings, especially at low conductivity readings below 20uS/cm. Both the Cell Constant and the
Cal Factor are printed on the tag attached to the 4-electrode sensor/cable.
The display screen for entering Cal Factor is shown. The default value is
displayed in bold type. If necessary after initial installation and start-up,
enter the Cal Factor as printed on the sensor tag.
Section 6: Programming Measurements
(Figure 6-2) to complete this function.
Section 6: Programming Measurements
S1: 1.234µS/cm 1.234°C
S2: 12.34pH
S3: 12.34µS/cm 1.234°C
Configure
Enter Data Points
Calculate Curve
S1: 1.234µS/cm 1.234°C
S2: 12.34pH
S3: 12.34µS/cm 1.234°C
SN Calculate Curve
Custom curve
fit completed.
In Process Cal
recommended.
S1: 1.234µS/cm 1.234°C
S2: 12.34pH
S3: 12.34µS/cm 1.234°C
SN Calculate Curve
Failure
S1: 1.234µS/cm 1.234°C
S2: 12.34pH
S3: 12.34µS/cm 1.234°C
0.95000/cm
April 2017
1.234°C
SN Custom Curve
1.234°C
1.234°C
1.234°C
SN Cal Factor
37