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Analog Voltmeter / Null Detector

Functional replacement for the Keithley 155, Fluke 845AB and HP419A Null Detectors

AVM-100 Analog Voltmeter/Null Meter
  • Mirror-backed meter eliminates parallax
  • Manufacturer support and calibration available
  • Battery operation for high isolation
  • The zero-center analog readout makes it easy to see trend lines, approaches to zero and small changes in readings, regardless of polarity. Isolated analog output allows for hard-copy or archival download to data acquisition systems, chart recorders and plotters.
  • See a feature-by-feature comparison of the AVM-100, Keithley 155 and Fluke 845AB below.
 
 
Key Specifications
AVM-100
Keithley 155
Fluke 845AB
Input Range
▒1mV to ▒1000V DC on 0 center
▒1mV to ▒1000V DC on 0 center
▒1mV to ▒1000V DC on 0 center
Accuracy
▒ (2% end scale + 0.1 ÁV)
▒ (2% end scale + 0.1 ÁV)
▒ (2%end scale + 0.1 ÁV)
Input Resistance
     
300 mV range and above:
100 M Ohms
100 M Ohms
100 M Ohms
1 mV - 300 mV range:
10 M Ohms
10 M Ohms
10 M Ohms
1 mV ľ 1 mV:
1 M Ohm
1 M Ohm
NS
Maximum Meter Noise
     
1 ÁV range:
0.20 ÁV
0.15 ÁV
0.20 ÁV
3 ÁV range:
0.25 ÁV
NS
0.25 ÁV
Other ranges:
0.30 ÁV
NS
0.20 ÁV
Meter Response Time (to 90% of reading)
     
1 ÁV range:
5 seconds
5 seconds
5 seconds
3 ÁV range:
3 seconds
NS
3 seconds
Other ranges:
1.5 seconds
1 second (+ 10 ÁV)
1.5 seconds
Power Supply
Rechargeable NiCad (40-hour operating life); 115 or 230 VAC, 50-440 Hz
4 internal carbon-zinc batteries, No AC supplied
Rechargeable batteries (40-hour operating life); 115 or 230 VAC, 50-440 Hz
Size
8" H x 8.5" W x 8.8" D, <10 lbs.
6.5" H x 8.25" W x 7.25" D, 6 lbs.
7" H x 8.5" W x 8" D, 10.25 lbs.
Rack Mount Available
Yes
No
845AR
 

 

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