83
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:
S1: 1.234µS/cm 25.0ºC
S2: 12.34pH 25.0ºC
S
N
Meter Cal
Use precision
resistors only
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
S1: 1.234µS/cm 25.0ºC
S2: 12.34pH 25.0ºC
S
N
InProcess Cal
Calibration
Error
Press EXIT
S1: 1.234µS/cm 25.0ºC
S2: 12.34pH 25.0ºC
S
N
InProcess Cal
Updated cell
constant:
1.00135/cm
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.
S1: 1.234µS/cm 25.0ºC
S2: 12.34pH 25.0ºC
S
N
Meter Cal
Calibration
Error
Press EXIT
S1: 1.234µS/cm 25.0ºC
S2: 12.34pH 25.0ºC
S
N
Enter Value
xx.xx kΩ
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.
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 25.0ºC
S2: 12.34pH 25.0ºC
S
N
Cal Factor
0
.95000 /cm
Instruction Manual
LIQ-MAN-1056
Section 7.0: Calibration
April 2017
Summary of Contents for Rosemount 1056
Page 4: ...Quick Start Guide Figure A Quick Start Guide ...
Page 5: ...Quick Reference Guide Figure B Model 1056 Menu Tree ...
Page 28: ...20 Instruction Manual LIQ MAN 1056 Section 2 0 Installation April 2017 ...
Page 50: ...42 Instruction Manual LIQ MAN 1056 Section 6 0 Programming the Measurements April 2017 ...
Page 84: ...76 Instruction Manual LIQ MAN 1056 Section 6 0 Programming the Measurements April 2017 ...
Page 122: ...114 Instruction Manual LIQ MAN 1056 Section 7 0 Calibration April 2017 ...
Page 124: ...116 Instruction Manual LIQ MAN 1056 Section 8 0 Return of Material April 2017 ...