Recent content by asherraph

i m still new to this material and chemical. i do more work on electronics and 3d modelling part. my boss just ask me to find out the silicone sealant that have verification on medical standard even we know that silicone is biocompatiblity. i do found acetoxy and elastomer and i know both are...

i do believe regular silicone is suitable for medical application and i found the silicone sealant but there is no certificated or verification to medical standard testing. there are two type silicone sealant that i found which acetoxy and elastomer.

do you mean, you got another fuse when you buy the DMM?? unluckily ,they did not give any spare for me,. just user manual with multi language. i will buy new fuse tomorrow..

i want to ask...is it any type of silicone sealant is suitable for medical application?? i need to find the sealant that are biocompatibility for pvc tubing and dialysate with body temperature. how about acetoxy and elastomer is it suitable??

since you said that and show the warning in the manual...i already checked and verified it. the fuse already blow but the DMM still work i guess except for the current measurement. i check the continuity of fuse since the fuse body not in transparent glass using same DMM.

if the fuse was broken...it should be no reading in ammeter right?. the fuse for my multimeter is MAX 400mA... if the reading of ammeter show the correct value..why my pt100 cannot read high temperature and become hot? if the voltage is high.. i already try voltage divider to reduce the...

nope..i connect directly from 3.3V to GND its show 0.2mA...while i connected to bridge also same...i not sure whether the way i connect ammeter might destroy the Arduino or not.

i m sorry for my poor explanation. I m still new to this forum interface.. i m not sure whether i upload it or not. ...... Arduino UNO is one of the most easiest learning microcontroller and its open-source code( meaning your code can be sharing). There are 3.3V and 5V pin from Arduino UNO...

okay..its make sense now...yeah its true.. ............ i am using arduino 3.3V as power supply...i measure the output current is 0.2mA, while if i am using 5V, the current output is 0.4mA..when i connect directly to the bridge...the pcb become hot...in other way.i m using voltage precision...

i try with 3.3V...still same... nothing change...it cannot read high temperature...i test it wtih 60*C of water...but the RTD show resistivity at 40*C...and test with cold water (15*C)..it read accurately around 14.5*C..

actually.. i can measure the RTD..but the RTD itself can not read high temperature as it should be...there is no problem when i test it with cold water and it can read accurately except for high temperature...is there a problem with circuit or RTD itself??

no...i measure the known resistance..but for RTD i m derive formula by myself from Vg = [ (r1/ (r1+r2)) - (rtd/ (rtd+r3)) ] Vs.. its correct this formula?? i give a try from your formula...

yes it true...but there is no specific voltage recommended...if that so.. i will give a shot with lower voltage..

i don't think our meter is inaccurate..before i solder the smd resistance..i measure it..and its show 100ohm...after i connect into wheatstone bridge...i try to measure using multimeter on one of the resistance...its show 80ohm something...Voltage input is 5V..supply with voltage...

currently i working on RTD sensor using wheatstone bridge...but after i complete the circuit where Ra=Rb=Rc=100ohm wiith RTD pt100...i measure the resistance through multimeter...the value resistance is drop to 78 - 84 ohm..its normal?...or anyone has explanation.. i am also has a problem with...