I´ve been looking at the mini-three wire 4-20mA transmitter and it is everything I need to try a new way of measuring the temperature. It is great but there are a few questions about it I hope you can answer them:
message: what is the pros and cons of rtd,over thermocouple
Mail from MU
Read the pages in links below, that ought to clarify your doubts. Last edited February 16, 2007
Comparison of Thermistors, Thermocouples and RTD's ... Unlike RTD's and thermistors thermocouples have plus and minus legs so polarity must be observed.
Thermocouple - No resistance lead wire problems, Fastest response; RTD - Most stable, accurate, Contamination resistant,; Thermistor - High output, fast, Point temperature sensing.
Since thermocouples measure wide temperature ranges and are relatively rugged, they are very often used industrial and process applications where accuracy may be a less important factor.
Use the wayback machine for above links
plz send me sound equalizer circuits. - email by AH
Search for ...... graphic equalizer circuits. You have many pages to see, and the navigation for all the pages is at bottom of every page. anyway, i did it for you,
I’m looking for a source of decade counters and wonder if you can help? I don’t want to build the counter, I want to buy a functioning counter module.
Can I use three MOC3043 and three TIC236E triacs of course with all opto LEDs in series?
Mail from FJP Brazil
See my SSR Circuits , Solid State Relays or SSR Choose a DC Control and AC Load SSR, That is what you seem to indicate.
1 hp = 745.699872 watts
Let triac have 10 A and 600V AC ratings, BTA12600 But now BTA12600 is obsolete, adapt to what is available in your country.
MOC3043 is fine, isolation must be good, take care. Use a Heatsink.
ON-OFF Control inputs can be parallel not series.
Here is a picture of a Solid State Contacter from Power IO
On this page you can see a 3 phase SSR i built. Three-Phase-SSR.