<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div><span></span></div><div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div><div style="text-align: start;"><div><span style="background-color: rgba(255, 255, 255, 0);">Re-thinking the ammeter question.</span></div><div id="AppleMailSignature"><span style="background-color: rgba(255, 255, 255, 0);">I had suggested using a shunt for measuring amps & Cliff is using some </span></div><div id="AppleMailSignature"><span style="background-color: rgba(255, 255, 255, 0);">expensive unit based on measuring the electric field around the wire.</span></div><div id="AppleMailSignature"><span style="background-color: rgba(255, 255, 255, 0);">With a PLC could I not just buy an inexpensive Voltage sensor with 4-20Ma output</span></div><div id="AppleMailSignature"><span style="background-color: rgba(255, 255, 255, 0);">& an inexpensive resistance sensor with 4-20Ma output & calculate the Amps</span></div><div id="AppleMailSignature"><span style="background-color: rgba(255, 255, 255, 0);">in the PLC program based on these 2 numbers (V/R=A)</span></div><div id="AppleMailSignature"><span style="background-color: rgba(255, 255, 255, 0);">I believe these items are called conditioners; most are very expensive. Can't</span></div><div id="AppleMailSignature"><span style="background-color: rgba(255, 255, 255, 0);">understand why as multimeters do a number of measuring functions & are cheap.</span></div><div id="AppleMailSignature"><span style="background-color: rgba(255, 255, 255, 0);">Does anyone know of a suitable Voltage & resistance sensor, or is this not</span></div><div id="AppleMailSignature"><span style="background-color: rgba(255, 255, 255, 0);">the best way to do it. Cliff, what are you using for measuring voltage, thanks.</span></div><div id="AppleMailSignature"><span style="background-color: rgba(255, 255, 255, 0);">Cheers Alan</span></div><div><br></div></div><br>Sent from my iPad</div></div></body></html>