Emerson Series 3000 MVD Manuel D’Utilisation

231

Excessive drive gain can be caused by several problems. See Table 22-11.

Erratic drive gain can be caused by several problems. See Table 22-12.

(1) If your sensor is not listed, contact Micro Motion.

ELITE Model CMF sensors

3.4 mV peak-to-peak per Hz based on sensor flow tube frequency

Model D, DL, and DT sensors

3.4 mV peak-to-peak per Hz based on sensor flow tube frequency

Model F025, F050, F100 sensors

3.4 mV peak-to-peak per Hz based on sensor flow tube frequency

Model F200 sensors (compact case)

2.0 mV peak-to-peak per Hz based on sensor flow tube frequency

Model F200 sensors (standard case)

3.4 mV peak-to-peak per Hz based on sensor flow tube frequency

Model H025, H050, H100 sensors

3.4 mV peak-to-peak per Hz based on sensor flow tube frequency

Model H200 sensors

2.0 mV peak-to-peak per Hz based on sensor flow tube frequency

Model R025, R050, or R100 sensors

3.4 mV peak-to-peak per Hz based on sensor flow tube frequency

Model R200 sensors

2.0 mV peak-to-peak per Hz based on sensor flow tube frequency

Micro Motion T-Series sensors

0.5 mV peak-to-peak per Hz based on sensor flow tube frequency

CMF400 I.S. sensors

2.7 mV peak-to-peak per Hz based on sensor flow tube frequency

CMF400 sensors with booster amplifiers

3.4 mV peak-to-peak per Hz based on sensor flow tube frequency

Excessive slug flow

Eliminate slugs.

Change the sensor orientation.

Plugged flow tube

Purge the flow tubes.

Cavitation or flashing

Increase inlet or back pressure at the sensor.

If a pump is located upstream from the sensor, increase the distance 
between the pump and sensor.

Overpressurized tubes

Contact Micro Motion.

Drive board or module failure, cracked flow tube, 
or sensor imbalance

Contact Micro Motion.

Mechanical binding at sensor

Ensure sensor is free to vibrate.

Open drive or left pickoff sensor coil

Contact Micro Motion.

Incorrect sensor characterization

Verify sensor configuration. See Section 22.16.