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D
Wiring issue for RTD and Vibration Sensors
"We observed the cables jaket broken in some cables, and not possible to replace the cables as a solution becuse the distance so far to marshaling in Control room." Broken jackets lead to many problems. Check your instrumentation grounds, as ground faults in your electrical power for motors...
Dave
Post #7
Sep 21, 2024
Forum:
Instrumentation & Measurement
D
Wiring issue for RTD and Vibration Sensors
You can test your cable continuity, connections, insulation effectiveness. You also have to check for grounding errors. If not grounded properly, ground faults in the field can affect your signals. Good luck,
Dave
Post #6
Sep 21, 2024
Forum:
Instrumentation & Measurement
D
what bandwidth is needed for spectrum analyzers for automation control panel?
You'll have to explain what you are trying to accomplish
Dave
Post #2
Sep 21, 2024
Forum:
Instrumentation & Measurement
D
Wiring issue for RTD and Vibration Sensors
Talal9001 "We observed the cables jaket broken in some cables" that is the problem that needs to be solved first. High quality cables and routing is important as is insuring their protection.
Dave
Post #3
Sep 21, 2024
Forum:
Instrumentation & Measurement
D
2 DVC6200 on 585c Fisher
Sounds like a Friday 13th problem
Dave
Post #2
Sep 13, 2024
Forum:
Control Valves
D
Suggestions for turning solenoid on/off variable 50-300 time per minute
Per the original post, what are you trying to accomplish?
Dave
Post #3
Sep 13, 2024
Forum:
General Automation Chat
D
How to measure vibration in mm/s WHILE Bently Nevada has output of 0-10V?
Check you display scale setting
Dave
Post #2
Sep 12, 2024
Forum:
Instrumentation & Measurement
D
Masoneilan SVI II AP positioner fault
The Calibration menu shown in Figure 35 provides access to all the calibration functions for the SVI II AP. If a change is made in the Air-To-Open/Air-To-Close configuration option or if you move the SVI II AP to a different valve or make any change to the valve position linkage, you must run...
Dave
Post #2
Sep 9, 2024
Forum:
Instrumentation & Measurement
D
STG Condenser Level Transmitter Fault
Don't forget the transmitters only report a pressure differential. If the fluid is subject to temperature or composition gradients, or unexpected flow patterns that alter the reported pressure, you can only estimate the actual fluid level.
Dave
Post #9
Aug 22, 2024
Forum:
Instrumentation & Measurement
D
STG Condenser Level Transmitter Fault
Your IMG-202404821_0 appears to show the flush ring mounted on the back of a flanged diaphram seal.
Dave
Post #6
Aug 21, 2024
Forum:
Instrumentation & Measurement
D
STG Condenser Level Transmitter Fault
You need to contact your supplier, and read the maintenance literature. Sealed capillary systems are not meant to be flushed.
Dave
Post #2
Aug 20, 2024
Forum:
Instrumentation & Measurement
D
Using a contactor to block miswiring in a test setup
You'll need to provide a scetch of your circuit and your proposed contactor
Dave
Post #2
Aug 7, 2024
Forum:
Safety
D
Expert opinion on Turbine Vibration Dips Issue and Remedial Actions
Boiler feed water pumps are subject to a vast number of process variables, so you'll have to spend a lot of time getting familiar with the actual operating environment.
Dave
Post #3
Aug 6, 2024
Forum:
Power Generation
D
Flow measurement
Make sure all air is flushed out of the instrument tubing using the bleed vents at the transmitter, to insure stable zero setting. 5% to 6% error at low flow conditions is not uncommon in operating plants.
Dave
Post #4
Aug 2, 2024
Forum:
Instrumentation & Measurement
D
Flow measurement
What is the pipe size, details of your orifice plate, and the vendors meter calculation, and piping layout
Dave
Post #2
Aug 1, 2024
Forum:
Instrumentation & Measurement
D
multimeter for car
You may not be able to disconnect wiring for trouble shooting, so how would you measure current
Dave
Post #13
Jul 30, 2024
Forum:
Instrumentation & Measurement
D
multimeter for car
Measuring current in a traditional vehicle, you'll need to have clamp on access, for both moderate and high currents. With electric vehicles, you'll have to consult the manufacturers recommended practice and test equipment.
Dave
Post #10
Jul 29, 2024
Forum:
Instrumentation & Measurement
D
RTD Failure - Sheath split
The first time I saw such damage, it looked like it was intentionally hammered on an anvil, not unlike the op's image
Dave
Post #10
May 20, 2024
Forum:
Instrumentation & Measurement
D
RTD Failure - Sheath split
The sheath thickness of Pt RTDS'a is less than 0.1mm and when damaged your first impression is how could it be so damaged. When flow induced resonances are involved, the tip acceleration can easily become 50-100 G's high frequency vibration. The sensors don't last long at that level.
Dave
Post #8
May 19, 2024
Forum:
Instrumentation & Measurement
D
RTD Failure - Sheath split
First determine if flow induced resonance conditions are likely, just to identify possible cause and future risk you might be dealing with. All you need are nominal dimensions of your thermowell, and nominal fluid velocity, presumed liquid. Some applications require RTD measurements, especially...
Dave
Post #6
May 19, 2024
Forum:
Instrumentation & Measurement
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