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Wednesday, April 25, 2018
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Sensors - Topic Page
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Gas Turbine IBH Valve Opening Without Any Command
Posted by gtengineer on 7 February, 2018 - 12:19 pm
GE Frame 6 B Turbine Inlet Bleed Heating Valve opening without any command.
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By CSA on 24 April, 2018 - 10:45 am
>during valve opening malfunction, the pressure transmitter >value before IBH is (-ve). ...
By shahiideee on 22 April, 2018 - 5:10 am
We have 6FA Machine with MarkVIe control system. one of our GT has similar problem. if we reduce GT...
By gtengineer on 8 March, 2018 - 3:17 pm
We confirmed from the trends and the results that the IBH valve got opened by itself. We can say...
By CSA on 3 March, 2018 - 9:53 am
No intelligible information. You say you have data to show that the valve opens all by itself....
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Pressure Monitoring System Issue
Posted by servo92 on 20 April, 2018 - 9:01 am
Reverse voltage Readings Issue of Sensors
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By dwpatterson on 21 April, 2018 - 5:48 am
You have choosen a 4-20mA transmitter that outputs 4-20mA over a range of DAC counts from 670 to...
By Curt Wuollet on 20 April, 2018 - 9:09 pm
By the way, why do you have two transmitters? Cww...
By Curt Wuollet on 20 April, 2018 - 9:05 pm
Sounds just like a 4-20 ma. Current sink. Your load would go from the output to the positive supply...
H 25 Gas Turbine Control
Posted by Thettinaung on 20 April, 2018 - 1:43 am
Questions about H 25 Control system
Failsafe System on a Metal Detector
Posted by Bronagh on 18 April, 2018 - 7:48 am
Alarm for failsafe valve on metal detector but the alarm does not sound immediately when it is switched off
MH50 Pallet System Restore Help - Battery Died
Posted by Tony on 12 April, 2018 - 10:31 am
We have a Mitsubishi MH50 Mill that battery went dead in Pallet Pull side - we borught up, set parameters but still won't work.
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Air-Cooling Unit Outlet Temperature Control
Posted by Aleksei on 28 March, 2018 - 1:43 pm
Distillation column has air-cooling unit outlet temperature control problem.
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By Hans H. Eder on 12 April, 2018 - 6:50 am
Lowering the PID execution frequency is not going to help. The better approach: First try to get...
By avihu on 10 April, 2018 - 8:00 am
You have a classic "dead time" case. The simple way to approach it is by s l o w i n g...
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Level Sensor in Sanitary Slurry Tank with Diaphragm Pump
Posted by supervisedautomation on 6 December, 2017 - 1:39 pm
I'm looking for a sensor system to indicate how much water has been added to tank and also to indicate when the tank has been pumped empty.
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By Hilton on 7 April, 2018 - 4:47 pm
Since you are only monitoring two conditions you should consider using level switches, one for full...
By Ronnny on 6 April, 2018 - 7:57 pm
You need a robust level transmitter for this application. I think you can try Displacer level...
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Fuel Gas Flow Measurement
Posted by ali_alshaibani_iq on 27 February, 2018 - 12:49 am
Reading difference between two Frame 9E GT. Want to test and calibrate flow transmitter.
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By inakieseberri on 31 March, 2018 - 1:56 pm
Hello, In case you have any doubts about orifice plate installation, have a look at this...
By scenesdream on 13 March, 2018 - 12:35 pm
Hi, Usually, you can see the differential pressure created by the orifice place written on own...
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1794-IF4I Connection with 2 Wires Transmitter
Posted by kareem_405 on 28 March, 2018 - 6:10 am
Using 1794-IF4I to read and power up analyzer transmitter, but cannot get the analyzer to power up.
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By kareem_405 on 29 March, 2018 - 12:29 pm
I have did this and the analyzer working now. thanks for the solution I just used terminal 38...
By feuchtde on 28 March, 2018 - 4:58 pm
The Rosemount 5081C-HT is a 2 wire HART Conductivity transmitter. I requires 24VDC+ on terminal 16...
By RoyMatson on 28 March, 2018 - 12:27 pm
As Bob says, I think you are missing the loop power supply. Normally we would provide 24 Volts to...
By Bob Peterson on 28 March, 2018 - 9:53 am
Normally you would wire the 24 volts Plus to the plus terminal on the transmitter, and the minus...
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Panel-mount Volt/Amp Meter Sourcing
Posted by Sam S. on 21 March, 2018 - 5:30 pm
Can't find appropriate volt/amp meters for high voltage applications. What are my options?
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By RoyMatson on 27 March, 2018 - 4:58 pm
For current meters look for a meter that reads millivolts and either buy a shunt that puts out 1 or...
By JRaef2 on 23 March, 2018 - 7:54 pm
First off, 600VAC is not an unusual voltage for a meter. I don't know where you are looking, maybe...
By Sam S. on 22 March, 2018 - 3:10 pm
Curt, This looks like the best option so far, thanks for the advice. In calculating resistor...
By Curt Wuollet on 22 March, 2018 - 11:18 am
The way I've done this is to get the widely available digital panel meters that let you program the...
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Modbus Control for Digital Dial Gauge Data Logger
Posted by brilliant_idea on 26 March, 2018 - 12:13 am
Have an 8-channel Modbus data logger for reading 8 digital dial gauges from China and need some assistance with its Modbus communication.
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By ptewari75 on 26 March, 2018 - 4:17 pm
As the data sheet is in Chinese but thanks to Google as language is not barrier. As per document...
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Bently Nevada 7200 Series Probe
Posted by Rabielias on 19 February, 2018 - 3:07 pm
Looking for the correct Probe for 7200 Bently Nevada
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By Quentin on 26 March, 2018 - 11:55 am
WE can clone Bently Nevada old 3000 series TONOX CP-36254-03 & CP-36254-02 prox probes here in...
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Wire Multiple Modbus Sensors
Posted by hand10 on 17 March, 2018 - 10:06 am
Want to wire three sensors (4 wire, RS485) and use Modbus RTU communication.
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By David_2 on 22 March, 2018 - 9:07 pm
I'm an industrial guy so I think in terms of protected wiring: trays, conduit, panels, ducts, etc;...
By hand10 on 20 March, 2018 - 2:32 am
Thank you! What can I use to do the connections? Breadboard and jumper wires? Can I email you?...
By David_2 on 19 March, 2018 - 11:30 pm
RS-485 multidrop networks are daisy chains, as shown in the graphics in the links below. This...
By W.L. Mostia on 18 March, 2018 - 9:16 pm
Modbus.org (http://www.modbus.org/) is a good resource website. Have a look at the below link and...
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Anyone Heard of Piecal Calibrators?
Posted by Rora on 17 March, 2018 - 1:43 pm
Quality of Piecal brand handheld calibrators
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By Rora on 18 March, 2018 - 7:12 pm
Thank you for such a detailed response! Sounds like a great device but honestly I'm most...
By David_2 on 18 March, 2018 - 3:35 pm
I like the PIE's. Our company has had a half a dozen 334's (4-20mA calibrator/sources) for at...
By oneye14 on 17 March, 2018 - 5:35 pm
Thank you for bringing this to our attention - not heard of them before! It's described as a...
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New Valve Feedback Signal Woes
Posted by Wtpguy_Bill on 15 March, 2018 - 11:47 pm
Replaced a Jordan MV-1020 with an RCV SEVA-200. Feedback 4-20 gives constant 100% open indication at HMI regardless of valve position.
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Need Help - Change sensor to accurately detect box jams
Posted by MaintDude on 10 March, 2018 - 8:40 pm
Looking to use a different sensor to detect jams. On a conveyor belt, when boxes are pushed together and there is no gap between them it thinks there's a jam even when the boxes are moving past.
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By RoyMatson on 15 March, 2018 - 4:56 pm
It's not clear whether you are trying to sense lack of a gap or lack of motion. Lack of a gap could...
By TheBurnerMan on 15 March, 2018 - 11:58 am
Look for laser distance sensors which give you an analogue (e.g 4-20mA). Build in some logic in...
By Shakopee on 13 March, 2018 - 9:19 am
With the challenges you face it might be better to think mechanically as well. Could you design an...
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Flow Transmitter Calibration (Micro Motion EMERSON)
Posted by steve40 on 9 March, 2018 - 5:11 am
How to calibrate an micro motion flow transmitter 2700R using display buttons.
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By Chris on 13 March, 2018 - 4:44 pm
Because this is a Foundation fieldbus device, you likely need to change the Output scaling in the...
By scenesdream on 12 March, 2018 - 5:39 pm
Hi, If you find the 2700 micro motion user manual, and then you go to Appendix 4 then you have...
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Effect of Compressor on Orifice Flow Measurement
Posted by gtengineer on 28 February, 2018 - 12:42 pm
Effect of Screw Compressor on the upstream Orifice Flow Measurement.
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By d on 9 March, 2018 - 7:08 am
Is this just a generic inquiry low and high pressure flow measurement? or Are you...
By WilsonD on 8 March, 2018 - 4:52 pm
It sounds like the booster is a constant displacement type device, meaning that its' inlet flow...
By gtengineer on 8 March, 2018 - 3:13 pm
Hi Thanks for your responses. Let me explain my question again. Yes you identified it...
By William_Milligan on 7 March, 2018 - 6:24 am
Assuming by your username this is an oil injected screw used in a GT feed application trying to...
By d on 2 March, 2018 - 11:36 am
Got it, misread the sentence describing the recycle tie-in. As long as you have adequate run...
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SIL3 Design
Posted by tharunsreedharan on 26 February, 2018 - 7:41 am
SIL3 instrument and wiring to PLC
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By W.L. Mostia on 7 March, 2018 - 11:20 pm
There are not many SIL3 instrument around and most will be logic solvers. This is because a SIL 3...
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Loop-powered vs. 2-Wire Device
Posted by hassankh on 2 March, 2018 - 10:57 am
Want to understand if there is any difference between 2-wire and loop-powered device.
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By David_2 on 2 March, 2018 - 3:53 pm
> Is there really a difference between 2-wire and loop-powered devices? Answer: No....
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Active vs. Passive Signal
Posted by hassankh on 25 February, 2018 - 1:47 pm
Exact difference between active and passive signal
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By hassankh on 2 March, 2018 - 10:52 am
Yes I believe they refer to 2-wire systems as passive and 3- and 4-wire systems as active....
By RoyMatson on 1 March, 2018 - 7:35 pm
I believe Active / Passive is a poor choice of words. Would you say a thermocouple is an active...
By feuchtde on 1 March, 2018 - 2:11 pm
Generally, a device that is self-powered is an active device, and one that is externally powered is...
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Setting Thrust Position on Bently 3300
Posted by DbyC on 1 March, 2018 - 12:20 pm
Trying to figure out how to adjust the zero settings on the 3300/20 card.
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By stecav on 1 March, 2018 - 3:46 pm
I advise you to contact Bently technical support or the 3300/20 manual. You need to slide the front...