
Rosemount Model 3095 Multivariable
™
Level Controller
5-8
TABLE 5-5. (continued).
Symptom
Corrective Action
Low PV Reading or No 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 the milliampere rating of the power supply against the
total current being drawn for all devices being powered.
• Check for shorts and multiple grounds.
• Check for proper polarity at the signal terminal.
• Check loop impedance.
• Check the wire insulation to detect possible shorts to ground.
IMPULSE PIPING
• Check to ensure that the pressure connection is correct.
• Check for leaks or blockage.
• Check to ensure that blocking valves are fully open and that
bypass valves are tightly closed.
• Check for entrapped gas in liquid lines and for liquid in
gas lines.
• Check for sediment in the device process flange.
• Make sure that process fluid has not frozen within the
process flange.
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.
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.
Содержание 3095
Страница 2: ......
Страница 4: ......
Страница 8: ...viii ...
Страница 10: ...Rosemount Model 3095 Multivariable Level Controller 1 2 ...
Страница 42: ...Rosemount Model 3095 Multivariable Level Controller 3 10 ...
Страница 74: ...Rosemount Model 3095 Multivariable Level Controller 5 18 ...
Страница 98: ...Rosemount Model 3095 Multivariable Level Controller B 4 ...
Страница 100: ...Rosemount Model 3095 Multivariable Level Controller C 2 FIGURE 3 1 Explosion Proof Drawing Factory Mutual 3095 1025A01A ...
Страница 101: ...C 3 Approval Drawings FIGURE 3 1 continued 3095 1025A02A ...
Страница 102: ...Rosemount Model 3095 Multivariable Level Controller C 4 FIGURE 3 1 continued 3095 1025A03A ...
Страница 103: ...C 5 Approval Drawings FIGURE 3 2 Index of I S F M for 3095 3095 1020A01A ...
Страница 104: ...Rosemount Model 3095 Multivariable Level Controller C 6 FIGURE 3 2 continued 3095 1020A02A ...
Страница 105: ...C 7 Approval Drawings FIGURE 3 2 continued 3095 1020A03A ...
Страница 106: ...Rosemount Model 3095 Multivariable Level Controller C 8 FIGURE 3 2 continued 3095 1020A04A ...
Страница 107: ...C 9 Approval Drawings FIGURE 3 2 continued 3095 1020A05A ...
Страница 108: ...Rosemount Model 3095 Multivariable Level Controller C 10 FIGURE 3 2 continued 3095 1020A06A ...
Страница 110: ...Rosemount Model 3095 Multivariable Level Controller C 12 FIGURE 3 3 continued 3095 1024A02A ...
Страница 111: ...C 13 Approval Drawings FIGURE 3 3 continued 3095 1024A03A ...
Страница 112: ...Rosemount Model 3095 Multivariable Level Controller C 14 FIGURE 3 4 Index of I S CSA for 3095 3095 1021A01A ...
Страница 113: ...C 15 Approval Drawings FIGURE 3 4 continued 3095 1021A02A ...
Страница 114: ...Rosemount Model 3095 Multivariable Level Controller C 16 FIGURE 3 4 continued 3095 1021A03A ...