Zeroing The Sensor; In Process Calibration - Emerson Rosemount 1066 Instruction Manual

Section 9: Calibration
April 2017
establish the slope of the calibration curve. Because stable total chlorine standards do not exist,
the sensor must be calibrated against a test run on a grab sample of the process liquid. Several
manufacturers offer portable test kits for this purpose.
To calibrate the chlorine sensor, access the Calibration screen by pressing ENTER from the main
screen, and press ENTER.
The following calibration routines are covered:
1. Zero Cal Zeroing the sensor in solution with zero total chlorine
2. Grab Cal Standardizing to a sample of known total chlorine concentration
To calibrate total chlorine:
1. Press the MENU button
2. Select Calibrate. Press ENTER.
3. Select Total Chlorine. Press ENTER.
The adjacent screen will appear. To calibrate Total Chlorine or
Temperature, scroll to the desired item and press ENTER
The following sub-sections provide you with the initial display screen that appears for each
calibration routine. Use the flow diagram for Chlorine calibration at the
end of Sec. 9 and the live screen prompts to complete calibration.
This adjacent screen appears after selecting Total Chlorine calibration:
9.6.2.1

Zeroing the Sensor

The adjacent screen will appear during Zero Cal. Be sure sensor has been
running in zero solution for at least two hours before starting zero step.
The adjacent screen will appear if In Zero Cal is successful. The screen will
return to the Amperometric Cal Menu.
The adjacent screen may appear if In Zero Cal is unsuccessful. The screen
will return to the Amperometric Cal Menu.
9.6.2.2

In Process Calibration

The adjacent screen will appear prior to In Process Cal
If the In Process Cal is successful, the screen will return to the Cal sub-
menu.
The adjacent screen may appear if In Process Cal is unsuccessful. The
screen will return to the Amperometric Cal Menu.
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Instruction Manual
LIQ-MAN-1066
1.234 µS/cm 25.0 ºC
SN Calibrate?
Total
Chlorine
Temperature
1.234 µS/cm 25.0 ºC
SN Calibration
Zero Cal
In Process Cal
1.234 µS/cm 25.0 ºC
SN Zero Cal
Zeroing
Wait
1.234µS/cm 25.0ºC
SN Zero Cal
Sensor zero done
1.234 µS/cm 25.0 ºC
SN Zero Cal
Sensor zero failed
Press EXIT
1.234 µS/cm 25.0 ºC
SN InProcess Cal
Wait for stable
reading.
1.234 µS/cm 25.0 ºC
SN InProcess Cal
Calibration error
Press EXIT
Calibration