hemnath
Advanced Member level 3
I am designing a source measure unit. Where it produces the output 24V voltage to power the transmitter and measure the loop current. Attached is the hand sketch. Please check it.
For testing, I have applied the current input from a precision current source and measured the output voltages. With my LCD and some software programming, it displays the value with 0.1uA stability. I am happy with the output.
But now I want to connect the transmitter and measure the current. From 24V, should I can directly connect it to the transmitter positive and negative input of LTC2057(B). Is that right?
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When I connect the transmitter as i said, current value in the LCD display is fluctuating. So I tried to power the transmitter externally using APLAB. Now the display value is steady. It seems the boost converter creates the issue. How can it be solved? any help.
For testing, I have applied the current input from a precision current source and measured the output voltages. With my LCD and some software programming, it displays the value with 0.1uA stability. I am happy with the output.
But now I want to connect the transmitter and measure the current. From 24V, should I can directly connect it to the transmitter positive and negative input of LTC2057(B). Is that right?
- - - Updated - - -
When I connect the transmitter as i said, current value in the LCD display is fluctuating. So I tried to power the transmitter externally using APLAB. Now the display value is steady. It seems the boost converter creates the issue. How can it be solved? any help.