Datamate 2200 O&M
Page 46
8.6.1 Transducer Tube Drive Test
The Datamate 2200 Coriolis Flow Transmitter incorporates a digital multimeter to provide
diagnostic information on the transducer. This display permits the user to view four (4)
diagnostic measurements from the transducer.
These measurements are
1. Drive Current (the measured AC current to the drive coil)
2. Sensor A voltage (the measured AC voltage from Sensor A)
Sensor voltages for transducer sizes 1/8
″
(m012) to 2
″
(m200) should be in the range
of 200mV ± 5mVrms. For 3
″
(m300) and 4
″
(m400) transducers this value should be
140mV ± 5mVrms.
3. Sensor B voltage (the measured AC voltage from Sensor B)
Sensor voltages for transducer sizes 1/8
″
(m012) to 2
″
(m200) should be in the range
of 200mV ± 5mV. For 3
″
(m300) and 4
″
(m400) transducers this value should be
140mV ± 5mVrms.
4. Drive Efficiency (a calculated value for determining drive efficiency)
If any value is out of range, it may suggest that the transducer tube driver is experiencing
difficulties in maintaining the sensor voltages and/or the setpoint for the sensor voltages
was not set to the optimum level as noted above.
8.6.2 Diagnostic Alarm Matrix
The diagnostic alarm matrix is highlighted in the following chart.
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