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Configuration and Use Manual 123
Troubleshooting
Measurement Performance DefaultsTroubleshootingCompensation
11.19.1 Obtaining the test point values
To obtain the test point values:
• With the display, configure the required test points as display variables. See Section 8.9.5.
• With ProLink II
a. Click
ProLink > Diagnostic Information.
b. Observe or record the values displayed for
Tube Frequency, Left Pickoff, Right Pickoff,
and
Drive Gain.
• With a DeviceNet tool, execute a Get for the attributes listed in Table 11-4.
11.19.2 Evaluating the test points
Use the following guidelines to evaluate the test points:
• If the drive gain is erratic, negative, or saturated, refer to Section 11.19.3.
• If the value for the left or right pickoff does not equal the appropriate value from Table 11-5,
based on the sensor flow tube frequency, refer to Section 11.19.4.
• If the values for the left and right pickoffs equal the appropriate values from Table 11-5, based
on the sensor flow tube frequency, record your troubleshooting data and contact Micro Motion
customer service. See Section 11.3.
Table 11-4 Test points with DeviceNet tool
Test point Class Instance Attribute
Drive gain Diagnostics Object (0x66) 1 20
Tube period 21
Left pickoff 23
Right pickoff 24
Table 11-5 Sensor pickoff values
Sensor
(1)
(1) If your sensor is not listed, contact Micro Motion. See Section 11.3.
Pickoff value
ELITE
®
CMF sensors 3.4 mV peak-to-peak per Hz based on sensor flow tube frequency
F025, F050, F100 sensors 3.4 mV peak-to-peak per Hz based on sensor flow tube frequency
F200 sensors 2.0 mV peak-to-peak per Hz based on sensor flow tube frequency
H025, H050, H100 sensors 3.4 mV peak-to-peak per Hz based on sensor flow tube frequency
H200 sensors 2.0 mV peak-to-peak per Hz based on sensor flow tube frequency
R025, R050, or R100 sensors 3.4 mV peak-to-peak per Hz based on sensor flow tube frequency
R200 sensors 2.0 mV peak-to-peak per Hz based on sensor flow tube frequency
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