5-7
Troubleshooting and Maintenance
TABLE 5-5. (continued).
Symptom
Corrective Action
Erratic PV Reading
LOOP WIRING
CAUTION
Do not use higher than the specified voltage to check the loop
or damage to the device may result.
• Check for adequate voltage to the device. It should be
11 to 55 V dc at the device terminals.
• Check
for
intermittent
shorts,
open
circuits,
and
multiple grounds.
PROCESS PULSATION
• Adjust the electronic damping (see page 4-4).
DEVICE ELECTRONICS
• Connect a Model 275 to check the sensor limits to ensure
calibration adjustments are within the sensor range and that
calibration is correct.
• Make sure the post connectors are clean.
• Confirm that the electronics housing is properly sealed
against moisture.
• If the electronics are still suspect, substitute new electronics.
IMPULSE PIPING
• Check for entrapped gas in liquid lines and for liquid in
gas lines.
• Make sure that process fluid has not frozen within the
process flange.
SENSING ELEMENT
• The sensing element is not field repairable and must be
replaced if found to be defective. Check for obvious defects,
such as a punctured isolating diaphragm or fill fluid loss, and
contact your nearest Rosemount Service Center.
Summary of Contents for 3095
Page 2: ......
Page 4: ......
Page 8: ...viii ...
Page 10: ...Rosemount Model 3095 Multivariable Level Controller 1 2 ...
Page 42: ...Rosemount Model 3095 Multivariable Level Controller 3 10 ...
Page 74: ...Rosemount Model 3095 Multivariable Level Controller 5 18 ...
Page 98: ...Rosemount Model 3095 Multivariable Level Controller B 4 ...
Page 101: ...C 3 Approval Drawings FIGURE 3 1 continued 3095 1025A02A ...
Page 102: ...Rosemount Model 3095 Multivariable Level Controller C 4 FIGURE 3 1 continued 3095 1025A03A ...
Page 103: ...C 5 Approval Drawings FIGURE 3 2 Index of I S F M for 3095 3095 1020A01A ...
Page 104: ...Rosemount Model 3095 Multivariable Level Controller C 6 FIGURE 3 2 continued 3095 1020A02A ...
Page 105: ...C 7 Approval Drawings FIGURE 3 2 continued 3095 1020A03A ...
Page 106: ...Rosemount Model 3095 Multivariable Level Controller C 8 FIGURE 3 2 continued 3095 1020A04A ...
Page 107: ...C 9 Approval Drawings FIGURE 3 2 continued 3095 1020A05A ...
Page 108: ...Rosemount Model 3095 Multivariable Level Controller C 10 FIGURE 3 2 continued 3095 1020A06A ...
Page 110: ...Rosemount Model 3095 Multivariable Level Controller C 12 FIGURE 3 3 continued 3095 1024A02A ...
Page 111: ...C 13 Approval Drawings FIGURE 3 3 continued 3095 1024A03A ...
Page 113: ...C 15 Approval Drawings FIGURE 3 4 continued 3095 1021A02A ...
Page 114: ...Rosemount Model 3095 Multivariable Level Controller C 16 FIGURE 3 4 continued 3095 1021A03A ...