Oxygen Calibration Routines - Emerson Rosemount 1056 Instruction Manual

Instruction Manual
LIQ-MAN-1056
TABLE 7- 9

Oxygen Calibration Routines

Measure Sec.
Oxygen
7.7.2
7.7.3
7.7.4
7.7.5
7.7.6
A detailed flow diagram is provided at the end of Sec. 7 to guide you through the calibration routines.
Oxygen sensors generate a current directly proportional
to the concentration of dissolved oxygen in the sample.
Calibrating the sensor requires exposing it to a solution
containing no oxygen (zero standard) and to a solution
containing a known amount of oxygen (full-scale standard).
Automatic air calibration is standard. The user simply
exposes the sensor to water-saturated air.
To calibrate oxygen:
1. Press the MENU button
2. Select Calibrate. Press ENTER.
3. Select Sensor 1 or Sensor 2 corresponding to
oxygen. Press ENTER.
4. Select Oxygen. Press ENTER.
The adjacent screen will appear. To calibrate Oxygen
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 Oxygen calibration at the
end of Sec. 7 and the live screen prompts for each routine
to complete calibration.
The adjacent screen appears after selecting Oxygen
calibration:
Air calibration criteria can be changed.
criteria can be adjusted:
 Stabilization time (default 10 sec.)
 Stabilization pH value (default 0.05 ppm)
 Salinity of the solution to be measured (default
00.0 parts per thousand)
The adjacent screen will appear to allow adjustment of
these criteria"
Calibration function: default value
Zero Cal
Air Cal
In Process Cal
Sen@ 25°C:2500nA/ppm
Zero Current:
The following
Description
Zeroing the sensor in a medium with zero oxygen
Calibrating the sensor in a water-saturated air sample
Standardizing to a sample of known oxygen concentration
Entering a known slope value for sensor response
0nA Entering a known zero current for a specific sensor
Section 7.0: Calibration
S1: 1.234µS/cm 25.0ºC
S2: 12.34pH 25.0ºC
SN Calibrate?
Oxygen
Temperature
S1: 1.234µS/cm 25.0ºC
S2: 12.34pH 25.0ºC
SN Calibration
Air Cal
Zero Cal
In Process Cal
Sen@ 25°C:2500nA/ppm
Zero Current: 1234nA
S1: 1.234µS/cm 25.0ºC
S2: 12.34pH 25.0ºC
SN Setup
Stable Time: 10 sec
Stable Delta: 0.05 ppm
Salinity: 00.0 ‰
April 2017
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