Emerson Series 3000 MVD User Manual
Configuration and Use Manual
201
Measurement Performance
Dia
g
nostics and T
roub
leshooting
Spe
c
ifica
tions – Model
3
350
/3
7
0
0
Specific
a
tions
–
Model
330
0
/3
500
Measure
ment P
e
rf
or
mance
mance
4. Use any established method to derive an accurate density, in g/cm
3
, for the fluid at line
conditions.
5. From the Density menu, select
Density D4
.
a.
Set the
D4
value to the line-condition density in grams per cubic centimeter.
b.
Select
Calibrate Density
, then press
SEL
. A “Calibration In Progress” alarm is generated.
6. 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.
7. Press
EXIT
to return to the Density menu.
8. (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.
21.6
Performing temperature calibration
Temperature calibration is a two-part procedure: temperature offset calibration and temperature slope
calibration. The entire procedure must be completed without interruption.
calibration. The entire procedure must be completed without interruption.
Temperature calibration requires reading and entering temperature values in degrees Celsius.
Although it is not required, it may be useful to configure the temperature unit for degrees Celsius. See
Section 7.3.2 for information on configuring the temperature unit.
Although it is not required, it may be useful to configure the temperature unit for degrees Celsius. See
Section 7.3.2 for information on configuring the temperature unit.
To perform the temperature offset calibration:
1. Fill the sensor with process fluid at the lowest temperature measured during the application.
2. Wait approximately 30 minutes for the flow tube temperature to stabilize.
3. Use a highly accurate thermometer, temperature sensor, RTD, or other device to measure the
temperature of the process fluid.
4. From the Maintenance menu, select
Calibration
.
5. Select
Temperature
.
6. Select
Low Temperature
.
7. At the Low Temperature menu:
a.
Set the
Low Temperature Value
to the temperature that was measured in Step 3, in
degrees Celsius, then press
SAVE
.
b.
Select
Calibrate Temp
, then press
SEL
.
8. During calibration, an alarm message is generated.
9. 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.
10. Press
EXIT
to return to the Temperature menu.
11. (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 temperature slope calibration:
1. Fill the sensor with process fluid at the highest temperature measured during the application.