Hi owners!
Who could repeat my simple experiment to check the accuracy of the Crest mode?
(Attachment Link)
I manually closed and opened the switch shown in the diagram, simulating a voltage drop. The average value for several measurements in the Crest mode was 7.60 V. As a result, the relative error was approximately 4%.
(Attachment Link) (Attachment Link) (Attachment Link)
Is this a normal error? What will happen to you?
I saw your double post about the car battery. Personally, I would use a scope for that application.
For the BM789, assuming we meet the 35ms minimum, in this range I would expect it to fall within +/-1V. Yours appears much tighter than that.
CREST mode (Instantaneous Peak Hold)
Accuracy: Specified accuracy +/- 100 digits for changes > 0.35ms in duration
Availability: Voltage and Current functions
Resolution: 6000 counts
For the BM869s:
Crest mode (Instantaneous Peak Hold)
Resolution: 5000 counts
Accuracy: Specified accuracy +/- 100 digits
for changes > 0.8ms in duration
For the Fluke 189:
Specified accuracy ±100 counts up to 5,000 count (full
range) reading. For higher peak readings (to 20,000
counts), specified accuracy ± 2% of reading.
250 μs for repetitive peaks; 2.5 ms for single events. Use DC function settings below 20 Hz. 50 mV range not specified.