Gammapilot M FMG60 PROFIBUS PA
Commissioning
Hauser
53
6.1.3
Calibration for density and concentration measurements
NOTICE
The fundamentals for calibrating for density and concentration measurement are described
in "
Basic principles
",
ä
70
.
Background calibration
For details see "Background calibration",
ä
72.
Calibration points (one-point calibration, multiple point calibration, recalibration)
For details see "Calibration points",
ä
74.
Step
Function
Action/comments
1
Switch off radiation
2
Background calibration (*10)
Select "start" with
O
or
S
;
confirm with
F
3
Avg. pulse rate (*11)
Wait until the value is stable, then confirm with
F
4
Background calibration (*10)
Select "stop/edit" with
O
or
S
;
confirm with
F
5
Background pulse rate (*12)
Confirm value with
F
Continue with entering the calibration points
Step
Function
Action/comments
1
• Switch on radiation
• Fill the pipe with a medium whose density is known or take a
sample of the medium during the calibration and determine its
density in the laboratory (see Step 4).
2
Calibration point density (*1A) Enter the number of the calibration point:
• For one-point calibration: "1"
• For multipoint calibration: "1" - "9"
• For recalibration: "10"
3
Calibration start stop (*15)
Select "start" with
O
or
S
;
confirm with
F
4
Avg. pulse rate (*11)
Wait until the value is stable, then confirm with
F
;
(during this time, take a sample of the medium and determine its
density in the laboratory)
5
Calibration start stop (*15)
Select "stop/edit" with
O
or
S
;
confirm with
F
6
Density calibration (*1B)
Confirm value with
F
7
Density value (*1C)
Enter the density of the medium (which was determined in the
laboratory)
8
Use of cal. point (*1D)
Select "used" with
O
or
S
;
confirm with
F
9
Absorption coefficient (*1E)
Display value; confirm with
F
10
Reference pulse rate (*1F)
Display value; confirm with
F
11
Calibration next point (*19)
• For one-point calibration: select "no";
this completes the calibration
• For multiple point calibration: select "yes";
repeats steps 1 - 10 with a medium with a different density
• For recalibration: select "no";
this completes the recalibration
