Emerson Series 3000 MVD User Manual

206

The meter fingerprinting feature provides snapshots, or “fingerprints,” of twelve process variables, at 
four different points of transmitter operation. See Table 22-2.

For each process variable, the following values are recorded:

•

For  Mech  Zero:

-

5-minute running average

-

5-minute running standard deviation

•

For all other process variables: 

-

Instantaneous value

-

5-minute running average

-

5-minute running standard deviation

-

Recorded minimum

-

Recorded maximum

To access meter fingerprint data, use the Maintenance menu as shown in Figure 22-1. The transmitter 
will report the data in either SI units or English units, as configured from the Units menu item. The 
display is updated continuously.

Unusually low density reading

Slug flow

See Section 22.7.3.

Incorrect K2 value

Verify characterization. See 
Section 22.16.

Sensor erosion

Contact Micro Motion.

Unusually high tube frequency

Sensor erosion

Contact Micro Motion.

Reversed drive coil leads (remote core 
processor with remote transmitter 
installations)

Verify drive coil leads

Unusually low tube frequency

Plugged, partially filled, or coated flow 
tube

Check drive gain and tube frequency. 
See Section 22.18.
Purge the flow tubes.

Unusually low pickoff voltages

Several possible causes

See Section 22.18.5

Unusually high drive gain

Several possible causes

See Section 22.18.3.

Current

Present-time values

• Mass flow rate
• Volume flow rate
• Density
• Temperature
• Case temperature
• Mech  zero

• Tube frequency
• Drive  gain
• Left pickoff
• Right pickoff
• Core processor temperature
• Core processor input voltage

Factory

Values at time transmitter left factory

Installation

Values at time of first sensor zero

Last zero

Values at time of most recent sensor 
zero

Process variables problems and possible remedies continued