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Created by: Buttsy65 at: 12/4/2019 7:54 PM (4 Replies)

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12/4/2019 7:54 PM	Rate (0)
Buttsy65 Posts: 3 Rating: (0)	Could anyone help me with a problem? i have an issue with a 4-20ma device input, what i would like to do is to monitor the bottom end of the scale 4 to 4.513ma, what i would like to do then is to output this range as full scale 4-20ma.. this would output to an electronic chart recorder displaying 0-100% To give a little more detail the unit i have is operating at 0-30,000psi i have multiple tests that operate at different pressures i dont want to install multiple transducers. the next value or test would be 0-2500 psi and so on... I hope that makes sense let me know if anyone has any thoughts
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12/4/2019 8:02 PM	Rate (0)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 12/1/2023 Posts: 31530 Rating: (3916)	Hello Buttsy65, at first welcome to the forum. This is limited possible, but not up to the third decimal place. This only works until the second decimal place. And if you want to convert the range of 4.00 mA to 4.51 in a range of 4-20 mA, there are very large jumps in the output range, since the resolution greatly deteriorated. If you want, I can make you an example.

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12/4/2019 8:12 PM	Rate (0)
Buttsy65 Posts: 3 Rating: (0)	Hi there thanks for the prompt reply, ok i hadnt considered the resolution as an issue is there a way i can get the resolution back? my guess is no. i would be interested to take a look if you dont mind
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12/4/2019 8:59 PM	Rate (0)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 12/1/2023 Posts: 31530 Rating: (3916)	Here is the example. The analog amplifiers B003 and B004 are only used to display the current value of the input signal and the output signal (in mA) for the display. In the properties of the analog output you have to select the type 4-20 mA (see the screenshot of the simulation). Attachment Example.zip (27 Downloads)

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This contribution was helpful to 1 thankful Users Buttsy65

12/4/2019 10:03 PM	Rate (0)
Buttsy65 Posts: 3 Rating: (0)	thanks i see the issue i appreciate your efforts PB
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