I'm considering to buy a multimeter. The following is its specs as listed at Amazon:
Featuring a wealth of functions, it is intended for troubleshooting various electrical issues arising in household, industrial and automotive devices.
Fast, accurate measurements at 3 readings per second update speed;
Backlit LCD Screen with perspicuous readings display;
Overload protection in all ranges;
Heavy duty build, suitable for indoor & outdoor use;
6000 counts display with TRMS , Large LCD size at 6.2*3.8CM
Rubber holster to protect the meter dropping when use.
Multi meter Specifications:
DC Voltage: 600mV ±(1.0%+10)
DC Voltage : 6V/60V/600V/1000V ±(0.5%+3)
AC Voltage (True RMS): 600mV ±(3.0%+3)
AC Voltage: 6V/60V/600V/700V ±(1.0%+3)
DC Current: 600uA/6000uA/60mA /600mA /10A/20A ±(1.5%+3)
AC Current: 600uA/6000uA/60mA /600mA/10A/20A ±(1.5%+3)
Resistance: 600/6k/60k/600k/6M/60 MΩ ±(0.5%+2)
Resistance: 60MΩ ±(1.5%+3)
Temperature: -20~1000℃ (-4~1832℉) ±(1.0%+5)
Capacitance: 10nF ±(5.0%+20)
Capacitance: 100nF/1uF/10uF/100uF/1000uF ±(2.0%+5)
Capacitance: 10000uF ±(5.0%+5)
Range Selection: Auto / Manual Ranging
Max Display: 6000 counts
Sample Rate: 3 times/s
Diode test: Yes
Continuity buzzer: Yes
Low battery indication:Yes
Auto power off: Yes
Restorable Fuse protection: Yes
Shock proof protection: Yes
AC frequency response: (60-1000)Hz
Battery: 2x1.5V (INCLUDED)
Product Net Weight: 343g
Working environment: 0~40℃, relative humidity < 80%"
This meter is advertized as a true RMS multimeter. What does "AC frequency response (60-1000)Hz" in the specs mean? Is it this meter's sampling rate to calculate RMS? If so, how does it compare to other true RMS multimeters'?
After writing the above, I just noticed that there's "Sample Rate: 3 times/s" in the specs. Is this the sampling rate to calculate RMS? Isn't this pretty low?