Updated Home (markdown)

Chris Esposito 2020-10-20 15:50:16 +11:00
parent d385f77a5e
commit 55396d234c
1 changed files with 6 additions and 3 deletions

@ -114,9 +114,11 @@ Unlock, drag the slider, re-lock. Big display at the bottom will tell you how m
Hardware-wise, the multimeter is just an alternative configuration of the oscilloscope with some additional software added. It measures the difference between the oscilloscope CH1 and CH2 pins, and uses 12-bit samples at 375ksps. The normal oscilloscope uses 8-bit samples only, **so sometimes the multimeter will function as a better oscilloscope than the oscilloscope will**!
**To measure voltage: **set the mode to "V" and connect the load in parallel to Oscilloscope CH1 DC and Oscilloscope CH2 DC.
### To measure voltage:
Set the mode to "V" and connect the load in parallel to Oscilloscope CH1 DC and Oscilloscope CH2 DC.
**To measure current:** set the mode to "I" and connect the load in series to Oscilloscope CH1 DC and Oscilloscope CH2 DC. Add a reference resistor across Oscilloscope CH1 DC (Duplicate) and Oscilloscope CH2 DC (Duplicate) that:
### To measure current:
Set the mode to "I" and connect the load in series to Oscilloscope CH1 DC and Oscilloscope CH2 DC. Add a reference resistor across Oscilloscope CH1 DC (Duplicate) and Oscilloscope CH2 DC (Duplicate) that:
* Is at most 10% of the load resistance.
@ -126,7 +128,8 @@ Then type in the reference resistance used into the box.
As an example, if you are measuring the current through a circuit that you suspect draws 50mA from a 3.3V source, you can guesstimate its load resistance to be 66Ω (as per V=IR). 10% of this is 6.6Ω. To drop 50mV, youll need to use at least a 1Ω resistor. So the reference resistor youll need for this circuit should be in the range of 1Ω-6.6Ω Ohms. A 2.8Ω or 3.3Ω resistor will be ideal in this case.
**To measure resistance/capacitance: **connect your load to Oscilloscope CH1 DC (Duplicate) and Oscilloscope CH2 DC (Duplicate). Connect Oscilloscope CH1 DC to Signal Gen CH1. Connect your reference resistor between Oscilloscope CH2 DC and GND.
### To measure resistance/capacitance:
Connect your load between Oscilloscope CH1 DC (Duplicate) and Oscilloscope CH2 DC (Duplicate). Connect Oscilloscope CH2 DC to Signal Gen CH2. Connect your reference resistor between Oscilloscope CH1 DC and GND.
For resistance, youll want to aim for a reference resistor as close to the load resistance as possible. To be more accurate, you may want to take multiple measurements.