Calibrating The Sensor To A Laboratory Instrument (Meter Cal); Cal Factor - Emerson Rosemount 1056 Instruction Manual

Instruction Manual
LIQ-MAN-1056
The adjacent screen will appear if In Process Cal is suc-
cessful. The screen will return to the conductivity Cal
Menu.
The adjacent screen may appear if In Process Cal is
unsuccessful. The screen will return to the conductivity
Cal Men
7.4.5 Calibrating The Sensor To A Laboratory
Instrument (Meter Cal)
This procedure is used to check and correct the
conductivity reading of the Model 1056 using a laboratory
conductivity instrument. This is done by submerging the
conductivity probe in a bath and measuring the conduc-
tivity of a grab sample of the same bath water with a
separate laboratory instrument. The Model 1056 reading
is then adjusted to match the conductivity reading of the
lab instrument.
The adjacent screen will appear after selecting Meter
Cal from the Conductivity Calibration screen:
After pressing ENTER, the display shows the live value
measured by the sensor
If the meter cal is successful the screen will return to the
conductivity Cal Menu.
The adjacent screen will appear if Meter Cal is unsuccessful.
The screen will return to the conductivity Cal Menu.
7.4.6

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 conduc-
tivity as displayed on the analyzer screen. The "Cal
Factor" entry is needed increase 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.
S1: 1.234µS/cm
S2: 12.34pH
SN InProcess Cal
Updated
constant:
1.00135/cm
S1: 1.234µS/cm
S2: 12.34pH
SN InProcess Cal
Calibration
Error
Press EXIT
S1: 1.234µS/cm
S2: 12.34pH
Use precision
resistors only
S1: 1.234µS/cm
S2: 12.34pH
xx.xx kΩ
S1: 1.234µS/cm
S2: 12.34pH
Calibration
Error
Press EXIT
The display screen for entering Cal Factor is shown.
The default value is displayed in bold type. If neces-
sary after initial installation and start-up, enter the "Cal
Factor" as printed on the sensor tag.
S1: 1.234µS/cm
S2: 12.34pH
0.95000 /cm
Section 7.0: Calibration
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cell
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SN Meter Cal
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SN Enter Value
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SN Meter Cal
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SN Cal Factor
April 2017
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