0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
What are the maori numbers from 1 to 20?
1, Tahi. 2, Rua. 3, Toru. 4, Wha. 5, Rima. 6, Ono. 7, Whitu. 8, Waru. 9, Iwa. 10, Tekau 11 tekau ma tahi 12 tekau ma rua 13 tekau ma toru 14 tekau ma wha 15 tekau ma rima 16 tekau ma ono 17 tekau ma whitu 18 tekau ma waru 19 tekau ma Iwa 20 Rua tekau
Can 4 - 20 mA be used to switch on and off 400 volt 3phase motor?
Yes but it has to be processed first. Programmable controller has the ability to take a 4-20 signal as an input and after processing close an output which can close a motor contactor.
If the range 0-100 what is the square root and linear output in 4-20mA?
% / Sqrt output mA / Non square output mA 0% / 4 / 4 10% / 9.059644256 / 5.6 20% / 11.15541753 / 7.2 25% / 12 / 8 30% / 12.76356092 / 8.8 40% / 14.11928851 / 10.4 50% / 15.3137085 / 12 60% / 16.39354671 / 13.6 70% / 17.38656042 / 15.2 75% / 17.85640646 / 16 80% / 18.31083506 / 16.8 90% / 19.17893277 / 18.4 100% / 20 / 20
How can 4444 equals 20?
4/4+4*4=20 1+4*4=20 5*4=20 20=20
What is the percentage of 4 out 20?
The percentage of 4 out of 20 is 20%.
Standred voltage used for transmission of 4-20 ma signals?
4ma = 1v rising to 5v @ 20ma
What devices uses anolog signals?
Generally process control devices use analog signal. Normally in an industrial automation setup, 0-20 mA (mili amp) or 4-20 mA or 0- 10 Volts are used. These signals are used for both providing control output and to provide feed back signal (say to a PLC (programmable logic controller) or DCS) Example for a control out put is a motorized damper operated by 4 - 20 mA signal. PLC provides 4-20 ma signal. Example of a feed back signal is 4 - 20 mA signal from temperature transmitter, measuring a liquid temperature to PLC as input.
4-20 ma loop testing?
Yes a 4 - 20 ma loop can be tested.
Why is 4-20 mA used more often in analog signaling and not 0-20 mA?
The 4-20 ma is used more often in analog signaling than 0-20 ma because sufficient power dissipation. The hence is the upper rage and was reduced to 20 ma.
Why use a 500 ohm power resistor?
500 ohm resistance is widely used to convert 4-20 ma current signals generated by a wide range of sensors into voltage signals. It provides 2 to 10 volts to the device. E=IxR.
Why 4-20 mA why not 3-19 mA for current output?
Because 4-20ma is an industry standard.
When is Ipswish MA spring break?
Generally the week of 4/20.
What are the release dates for AnthonyMaTube - 2012 MA-tthias 3-20?
AnthonyMaTube - 2012 MA-tthias 3-20 was released on: USA: 4 August 2013
How do you calibrate smart transmitter for flow measurement?
use the communicator and apply 4 MA which is your zero them apply 20 MA which is your span. .
Why 4-20 ma is used in Analog Signals?
Earlier, instead of 4-20 mA, 0-100 mA was used. But the usage of 0-100 mA led to sufficient power dissipation. Hence the upper range was reduced to 20 mA to optimize the power dissipation (this was found by experiments). In this way the upper limit was set. But this 20 mA is limited to cable length of 50 meters. For the lower limit i.e. 4mA . Zero was not used as the lower limit because it give no intimation about actual zero value or zero transmission due to some breaks in the circuitry. Therefore 4mA was set as the lower limit as it is also above the maximum leakage current in electronic circuits. In some transmitters, some times the transmitter shows 2 mA. This is used to indicate that there is some fault in the sensor. Actual zero is indicated by 4 mA. The scale is linear. For example, in a pressure transmitter of range 400bar. 0 bar - 4 mA 100 bar - 8 mA 200 bar - 12 mA 300 bar - 16 mA 400 bar - 20 mA. The reason for not using voltage is that voltage continuously drops over the length of the wire whereas current can be transmitted over a given length without any drop. The main purpose of using electrical quantities is transmission to remote locations.
Why 4 20 mA is used in transmitters?
The 4-20mA current loop is commonly used in transmitters because it is robust, able to deliver a signal over long distances without significant signal degradation or interference. It is also easily converted to a voltage signal at the receiving end for measurement or control purposes. The 4-20mA range is chosen for compatibility and standardization across different systems and devices.
A flow transmitter range is 0 to 2500mmH2o How many Milliamperes on 1250mmH2o?
Your total milliamp range is 4 to 20 milliamps. 4 Ma being 0mmH2o and 20 Ma being 2500mmH2o. So 1250mmH2o is 50% which is equivalent to 12Ma signal.
