Emerson Process Management CFA-3000 Benutzerhandbuch
23
CFA3000 MANUAL
SECTION 3
INSTRUMENT DESCRIPTION
2. The sample display for 20 mA and for 5 Vdc:
0020
2.
To exit, press .
To display the fullscale concentration embedded in the EProm:
Press two times. To exit, press .
3.4.1 Record
mV
Use the
mV value to determine that the method’s span and slope are correct. The change in millivolts (mV)
is the spread between a baseline and a fullscale standard at the time of calibration. The values are relative to
the chemical parameter being measured
the chemical parameter being measured
Record the millivolt values for both baseline and fullscale standard.
1.
Press
The sample Display for value of 150 mV is: 0 1 5 0
2.
To exit function, press once.
3.4.2 Initiate Auto Calibration
The analyzer is calibrated automatically usually every two days, depending on the chemistry. Auto calibration
performs both baseline and fullscale calibration. Baseline calibration measures a solution with 10% concentra
tion of the species of interest. Fullscale calibration measures a standard solution in the upper range of the
parameter of interest.
performs both baseline and fullscale calibration. Baseline calibration measures a solution with 10% concentra
tion of the species of interest. Fullscale calibration measures a standard solution in the upper range of the
parameter of interest.
Before starting calibration, make sure that the analyzer is running reaqgents and baseline
solution for at least 20 minutes.