101
The following screen will appear if Standard Cal is
successful. The screen will return to the Turbidity Cal
Menu.
7.10.3 Standardize Calibration
- Turbidity
The turbidity sensor can also be calibrated against a
commercial standard. Stable 20.0 NTU standards are
available from a number of sources. Calibration using a
commercial standard is simple. Filtered deionized water
is not required. Before beginning the calibration, the
analyzer does a dark current measurement. Dark cur-
rent is the signal generated by the detector even when
no light is falling on it. The analyzer subtracts the dark
current from the raw scattered light signal and converts
the result to turbidity. In highly filtered samples, which
scatter little light, the dark current can be a substantial
amount of the signal generated by the sensor.
This screen appears after selecting
Standard calibration.
The following screen may appear if Slope Cal is
unsuccessful.
This screen appears after selecting Slope calibration.
The following screen will appear if Slope Cal is suc-
cessful. The screen will return to the Turbidity Cal
Menu.
S1: 1.234µS/cm 25.0ºC
S2: 12.34pH 25.0ºC
S
N
Slope Cal
Sensor in pure H2O?
Press ENTER
S1: 1.234µS/cm 25.0ºC
S2: 12.34pH 25.0ºC
S
N
Slope Cal
Cal Complete
S1: 1.234µS/cm 25.0ºC
S2: 12.34pH 25.0ºC
S
N
Standard Cal
Cal Complete
S1: 1.234µS/cm 25.0ºC
S2: 12.34pH 25.0ºC
S
N
Slope Cal
Calibration
Error
Press EXIT
S1: 1.234µS/cm 25.0ºC
S2: 12.34pH 25.0ºC
S
N
Standard Cal
Sensor in Standard?
Press ENTER
The following screen may appear if Standard Cal is
unsuccessful.
S1: 1.234µS/cm 25.0ºC
S2: 12.34pH 25.0ºC
S
N
Standard Cal
Calibration
Error
Press EXIT
Instruction Manual
LIQ-MAN-1056
Section 7.0: Calibration
April 2017
Summary of Contents for Rosemount 1056
Page 4: ...Quick Start Guide Figure A Quick Start Guide ...
Page 5: ...Quick Reference Guide Figure B Model 1056 Menu Tree ...
Page 28: ...20 Instruction Manual LIQ MAN 1056 Section 2 0 Installation April 2017 ...
Page 50: ...42 Instruction Manual LIQ MAN 1056 Section 6 0 Programming the Measurements April 2017 ...
Page 84: ...76 Instruction Manual LIQ MAN 1056 Section 6 0 Programming the Measurements April 2017 ...
Page 122: ...114 Instruction Manual LIQ MAN 1056 Section 7 0 Calibration April 2017 ...
Page 124: ...116 Instruction Manual LIQ MAN 1056 Section 8 0 Return of Material April 2017 ...