HI,
I AM USING A CURRENT LOOP TRANSMITTER CIRCUIT FROM THE DATASHEET OF XTR111, THE INPUT TO THE XTR IS 0-5V COMING OUT OF A SENSOR'S SUPPORTING CIRCUITARY. WHEN I USE THE SENSOR IN THE VOLTAGE MODE, IT SHOWS THE CORRECT READINGS (MY CIRCUIT HAS JUMPER OPTION FOR SELECTING CURRENT OUTPUT OR VOLTAGE OUTPUT) WHICH I HAD VERIFIED WITH ANOTHER STANDARD METER. WHEN I USE IT IN CURRENT LOOP MODE, INSTEAD OF 4.3mA(WHICH SHOULD BE THE ACTUAL READING) IT SHOWS 6.5A !!
THE SIGNAL COMING OUT OF MY SENSOR IS A PWM SIGNAL WHICH I HAD CONVERTED IT IN 0-5V USING MANUFACTURERS DATASHEET GUIDELINES AND IS TESTED AND FOUND OK.
CAN YOU PLEASE LET ME KNOW WHAT MISTAKE I HAD MADE. I HAD ATTACHED MY SCHEMATIC TO THIS POST FOR YOUR REFERENCE.
WAITING FOR YOUR REPLY.