Emerson Rosemount 1057 Instruction Manual page 56

Section 7: Calibration
April 2017
The adjacent screen appears. To calibrate Conductivity or Temperature, scroll
to the desired item and press ENTER.
The following sub-sections show the initial display screen that appears for each calibration routine.
Use the flow diagram
screen prompts for each routine to complete calibration.
The adjacent screen appears after selecting conductivity Calibration.
7.4.2 Entering The Cell Constant
New conductivity sensors rarely need calibration. The cell constant printed on the label is sufficiently
accurate for most applications. The cell constant should be entered:
•
•
The display screen for entering Cell Constant for the sensor is shown.
The default value is displayed in bold type.
7.4.3 Zeroing The Instrument
This procedure is used to compensate for small offsets to the conductivity signal that are present even
when there is no conductivity to be measured. This procedure is affected by the length of extension
cable and should always be repeated if any changes in extension cable or sensor have been made.
Electrically connect the conductivity probe as it will actually be used and place the measuring portion
of the probe in air. Be sure the probe is dry.
The adjacent screen appears after selecting Zero Cal from the
conductivity calibration screen.
The adjacent screen appears if Zero Cal is successful. The screen returns to
the conductivity Cal menu.
The adjacent screen appears if Zero Cal is unsuccessful.
46
(Figure 7-3) for conductivity calibration at the end of this section and the live
When the unit is installed for the first time
When the probe is replaced
Instruction Manual
LIQ-MAN-1057
°
S1: 1.234µS/cm 1.234 C
°
S2: 12.34pH 1.234 C
°
S3: 12.34µS/cm 1.234 C
SN Calibrate?
Conductivity
Temperature
°
S1: 1.234µS/cm 1.234 C
°
S2: 12.34pH 1.234 C
°
S3: 12.34µS/cm 1.234 C
SN Calibration
Zero Cal
In Process Cal
Meter Cal
Cell K: 1.00000/cm
°
S1: 1.234µS/cm 1.234 C
°
S2: 12.34pH 1.234 C
°
S3: 12.34µS/cm 1.234 C
SN Cell Constant
1.00000 /cm
°
S1: 1.234µS/cm 1.234 C
°
S2: 12.34pH 1.234 C
S3: 12.34µS/cm
SN Zero Cal
°
1.234 C
In Air
In Water
°
S1: 1.234µS/cm 1.234 C
°
S2: 12.34pH 1.234 C
°
S3: 12.34µS/cm 1.234 C
SN Zero Cal
Sensor Zero Done
°
S1: 1.234µS/cm 1.234 C
°
S2: 12.34pH 1.234 C
°
S3: 12.34µS/cm 1.234 C
SN Zero Cal
Sensor Zero Fail
Offset too high
Press EXIT
Section 7: Calibration