Post History
The display counts range is one of the digital multimeter characteristics. We know that a DMM is based on an analog/digital converter, and we know too that each ADC has a certain resolution in bit...
#3: Post edited
by
Lorenzo Donati
·
2023-08-03T14:28:33Z (over 1 year ago)
Reformatted for better readability. Some minor grammar and wording adjustments.
digital multimeter display count range
- Digital multimeter display count range
The display counts range is one of the digital multimeter characteristics, we know that a DMM is based on an analog/digital converter. And we know too that each ADC has a resolution nBits. A 16 bits resolution is 2^16=65535 steps, log (65536) =4.8164799306 digits, so something between 50000 and 60000 counts, but we know too that an ADC can't see above its voltage reference (the maximum value that the ADC can convert).so i have here two questions:1. the number of steps isn't the same number of counts?2. in our example the number of counts, we calculate is 60000 if the reference voltage is 2.5000v then the number of counts gonna be 25000?
- The display counts range is one of the digital multimeter characteristics.
- We know that a DMM is based on an analog/digital converter, and we know too that each ADC has a certain resolution in bits.
- A 16 bit resolution is 2<sup>16</sup>=65535 steps, log<sub>10</sub>(65536)=4.8165 digits, so something between 50000 and 60000 counts.
- But we know too that an ADC can't see above its voltage reference (the maximum value that the ADC can convert).
- So I have here two questions:
- 1. Is the number of steps the same as the number of counts?
- 2. In our example the number of counts we calculate is 60000. If the reference voltage is 2.5000V then the number of counts is going to be 25000?
#2: Post edited
by
Lorenzo Donati
·
2023-08-03T10:57:36Z (over 1 year ago)
Retagged.
#1: Initial revision
by
Pacifist
·
2020-12-09T17:31:34Z (almost 4 years ago)
digital multimeter display count range
The display counts range is one of the digital multimeter characteristics, we know that a DMM is based on an analog/digital converter. And we know too that each ADC has a resolution nBits. A 16 bits resolution is 2^16=65535 steps, log (65536) =4.8164799306 digits, so something between 50000 and 60000 counts, but we know too that an ADC can't see above its voltage reference (the maximum value that the ADC can convert).
so i have here two questions:
1. the number of steps isn't the same number of counts?
2. in our example the number of counts, we calculate is 60000 if the reference voltage is 2.5000v then the number of counts gonna be 25000?