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Re: RTD 3th wire compensation Vs 2-wire with instrument ampl
Third wire is used for compensation of lead wire resistance. Since, the temperature resistance is interpreted by resistance
There is a ring of switches, with each switch connected to redundant servers or clients. All switches supports management via http.
How can I find a management ip address of switches ??
Switch is not of cisco, but it is of MOXA. I don't want to access the serial RS 232 port, since it is on...
In real world, does two routers use ethernet port to interface, and what for?
Can cross-over cables, used to connect routers also? I think cross-over cables are used only for trunking b/w 2 switches.
Re: color sensor
Color sensor can be built using set LDRs + coloured glass cover + Potentiomete(to adjust the sensitivity). Basic Principle is that for example RED light would pass thru RED Glass cover easily, than to say green or blue glass cover
On of the purpose of isolation transform is to prevent ground loops and isolate effects of lightning strikes.
We are using 1:1.1 isolation transformer for providing supply to instrumentation systems.
You can checkout on wikipedia, about thomas edison
https://en.wikipedia.org/wiki/Thomas_Edison
Under the article, "War of current", you can see that AC is slightly more dangerous than DC.
Regarding HVDC system, I am not sure.
I disagree that DC are more fatal, actually AC are more fatal. 60 Hz frequency system is usually more dangerous than 50 Hz system, b/c our muscle response for 60 Hz tends is to contract. That means if we touch a wire of 60 Hz, chances are more that our hand will involuntarily grasp the wire...
Question about routers?
Dear all,
Can two or more routers can be connected via ethernet interface?
If yes, then we have to use cross-over cable or straight cable?
Thanks,
Two or more wireless devices can operate without the help of WAP, this is called Ad hoc network, more scientific name for this kind of network is iBSN i.e independent Basic Service Network.
Wireless Access Point works at Layer 2. At layer 2, the unicast and broadcast have same overhead in terms of bytes. Because only difference is that unicast will have specific destination address, whereas the destination MAC address of broadcast is always all Fs(i.e FF-FF-FF-FF-FF-FF).
But...
I have few questions regarding the proposed detector using the piezo-electric transducer.
1. Will the piezo-electric transducer need to mounted on the glass?Since glass is slippery and vertical, how it will be mounted?
2. If any body tries to use a glass cutter, will it also detect that...
Cordless Phone Range
I have the following questions regarding the Cordless telephones
1. Which cordless telephone protocol and frequency has the largest range?
2. Which frequency in cordless telephone supports best voice quality and least interference?
3. Which model/features, I should look...
I have question that why negative voltage supply is more immune to noise.
I have seen that ECL works on negative voltage, eddy current probes also work on negative voltage. But I dont know the reason.
Thanx
Dear all,
I have a query about the resistance of thermocouple. If we connect the positive terminal of the ohm-meter to the positive lead of the thermocouple and negative terminal on the negative lead, then the resistance is about 2.3 Ω and when we reverse the polarity its resistance increases...
I come to know that there are transmitters available in market which can measure both opacity and dust concentration. How can it measure both. I learned that it is basically works on principle of autocollimination and uses beer lambarts law to find dust concentration. Can anyone explain me how...
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