Section 9: Calibration; Introduction; Calibration - Emerson Rosemount 1066 Instruction Manual

Instruction Manual
LIQ-MAN-1066

Section 9: Calibration

9.1

Introduction

Calibration is the process of adjusting or standardizing the transmitter to a lab test or a calibrated
laboratory instrument, or standardizing to some known reference (such as a commercial buffer).
The auto-recognition feature of the transmitter will enable the appropriate calibration screens to
allow calibration for any configuration of the transmitter. Completion of Quick Start upon first
power up enables live measurements but does not ensure accurate readings in the lab or in
process. Calibration should be performed with each attached sensor to ensure accurate,
repeatable readings.
This section covers the following calibration functions:
1. Auto buffer cal for pH (pH Cal -
2. Manual buffer cal for pH (pH Cal -
3. Set calibration stabilization criteria for pH (pH Cal -
4. Standardization calibration (1-point) for pH, ORP and Redox (pH Cal -
5. SMART sensor auto calibration upload
9.2

Calibration

New sensors must be calibrated before use. Regular recalibration is also necessary. Use auto
calibration instead of manual calibration. Auto calibration avoids common pitfalls and reduces
errors. The transmitter recognizes the buffers and uses temperature-corrected pH values in the
calibration. Once the 1066 successfully completes the calibration, it calculates and displays the
calibration slope and offset. The slope is reported as the slope at 25 °C.
To calibrate the pH loop with a connected pH sensor, access the Calibration screen by pressing
ENTER from the main screen and press ENTER.
The following calibration routines are covered:
1. Auto Calibration - pH 2 point buffer calibration with auto buffer recognition
2. Manual Calibration - pH 2 point buffer calibration with manual buffer value entry
3. Standardization - pH 1 point buffer calibration with manual buffer value entry
4. Entering A Known Slope Value - pH Slope calibration with manual entry of known slope value
5. SMART sensor auto calibration – auto detection and upload of cal data
To calibrate pH:
1. Press the MENu button
2. Select Calibrate. Press ENTER.
3. Select ph. Press ENTER.
The following sub-sections show the initial display screen that appears
for each calibration routine. Use the flow diagram for ph calibration
at the end of
calibration.
Calibration
Section
Section
Section 7 and the live screen prompts to complete
9.2)
9.2)
Section 9.2)
Section 9: Calibration
April 2017
Section 9.2 and 9.3)
1.234 µS/cm 25.0 ºC
SN Calibrate?
pH
Temperature
67