- #1
ttsky
- 20
- 0
Hi every one,
I placed a multimeter probe across the terminals of a 1.5 v alkaline battery and saw 2 M Ohms, I did the same across a mV power supply at 1.5 volts and got little below 1.5 K ohms. I don't understand what makes them have diffrent resistance, and exactly why?
I did this because I had an odd situation with a SIL 2 (safty integrity level) rated gas analyser, the analyser would only work with a real sensor or a battery at correct voltage, but not a simulator (e.g mV supply).The diffrence as it seems is the sensor has very high impedance. So i measured the resistance of the battery and the supply, and now i am confused why the battery shows such high resistance.
I placed a multimeter probe across the terminals of a 1.5 v alkaline battery and saw 2 M Ohms, I did the same across a mV power supply at 1.5 volts and got little below 1.5 K ohms. I don't understand what makes them have diffrent resistance, and exactly why?
I did this because I had an odd situation with a SIL 2 (safty integrity level) rated gas analyser, the analyser would only work with a real sensor or a battery at correct voltage, but not a simulator (e.g mV supply).The diffrence as it seems is the sensor has very high impedance. So i measured the resistance of the battery and the supply, and now i am confused why the battery shows such high resistance.