Emerson Rosemount 1057 Instruction Manual page 52

Section 7: Calibration
April 2017
The adjacent screen appears. To Calibrate pH 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
prompts to complete calibration.
7.2.2 Auto Calibration - pH
This screen appears after selecting pH cal.
Note that pH auto calibration criteria can be changed.
The following criteria can be adjusted:
•
•
•
The following commercial buffer tables are recognized by the analyzer:
•
•
•
•
The adjacent screen appears to allow adjustment of above criteria:
The adjacent screen appears if the Auto Cal is successful. The screen returns
to the pH Buffer Cal menu.
42
(Figure 7-1) for pH calibration at the end of this section and the live screen
Stabilization time (default 10 seconds)
Stabilization pH value (default 0.02 pH)
Type of Buffer used for AUTO CALIBRATION (default is Standard, non-commercial buffers).
Standard (NIST plus pH7)
DIN 19267
Ingold
Merck
The following screen appears if the Auto Cal is unsuccessful.
1. A High Slope Error generates the adjacent screen display:
2. A Low Slope Error generates the adjacent screen display:
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?
pH
Temperature
S1: 1.234µS/cm 1.234°C
S2: 12.34pH 1.234°C
S3: 12.34µS/cm 1.234°C
SN pH Cal
Buffer Cal
Standardize
Slope: 59.16mV/pH
Offset: 600 mV
S1: 1.234µS/cm 1.234°C
S2: 12.34pH 1.234°C
S3: 12.34µS/cm 1.234°C
SN Setup
Stable Time: 10 sec
Stable Delta: 0.02 pH
Buffer: Standard
S1: 1.234µS/cm 1.234°C
S2: 12.34pH 1.234°C
S3: 12.34µS/cm 1.234°C
SN pH Auto Cal
Slope: 59.16 mV/pH
Offset: 60 mV
S1: 1.234µS/cm 1.234°C
S2: 12.34pH 1.234°C
S3: 12.34µS/cm 1.234°C
SN pH Auto Cal
High Slope Error
Calculated: 62.11 mV/pH
Max: 62.00 mV/pH
Press EXIT
S1: 1.234µS/cm 1.234°C
°
S2: 12.34pH 1.234 C
°
S3: 12.34µS/cm 1.234 C
SN pH Auto Cal
Low Slope Error
Calculated: 39.11mV/pH
Min: 40.00 mV/pH
Press EXIT
Section 7: Calibration