Emerson Series 3000 MVD Manuel D’Utilisation

199

To perform the low-density calibration:

1. Fill the sensor with a low-density fluid, such as air.

2. If possible, shut off the flow. Otherwise, pump the fluid through the sensor at the lowest flow 

rate allowed by the process.

3. Use any established method to derive an accurate density, in g/cm

3

, for the fluid at line 

conditions. If air is the low-density calibration fluid, a value from Table 21-4 can be used for 
the density.

4. Press the Security button on the display.

5. From the Maintenance menu, select 

.

6. Select 

.

7. Select 

.

a.

Set the 

 value to the line-condition density in grams per cubic centimeter.

b.

Select 

, then press 

. A “Calibration In Progress” alarm is generated.

8. When the calibration is complete:

•

In the active alarm log, the alarm changes from “active” to “inactive but unacknowledged.”

•

If the calibration succeeded, a “Success” status is displayed.

•

If the calibration failed, a “Failed” status is displayed.

9. Press 

 to return to the Density menu.

10. (Optional) To clear the alarm from the active alarm log and the alarm bar at the top of the 

display, acknowledge the alarm using the procedures described in Chapter 22.

To perform the high-density calibration:

1. Fill the sensor with a high-density fluid, such as water.

0
1
2
3
4
5
6
7
8
9
10

32
33.8
35.6
37.4
39.2
41
42.8
44.6
46.4
48.2
50

0.99987
0.99993
0.99997
0.99999
1.00000
0.99999
0.99997
0.99993
0.99988
0.99981
0.99973

21
22
23
24
25
26
27
28
29
30

69.8
71.6
73.4
75.2
77
78.8
80.6
82.4
84.2
86

0.99802
0.99780
0.99756
0.99732
0.99707
0.99681
0.99654
0.99626
0.99597
0.99567

11
12
13
14
15
16
17
18
19
20

51.8
53.6
55.4
57.2
59
60.8
62.6
64.4
66.2
68

0.99963
0.99952
0.99940
0.99927
0.99913
0.99897
0.99880
0.99862
0.99843
0.99823

31
32
33
34
35
36
37
38

87.8
89.6
91.4
93.2
95
96.8
98.6
100.4

0.99537
0.99505
0.99473
0.99440
0.99406
0.99371
0.99336
0.99229