Fluke 8846a 6.5 digit multimeter teardown

I had an opportunity to play with Fluke 8846a. It’s a defective unit so can’t do a proper demo, but here’s a quick teardown and parts list. This multimeter retails for approx 1400 USD. Here’s an overview:

  • 6.5 digit resolution
  • Basic V dc accuracy of up to 0.0024 %
  • Dual display
  • 100 μA to 10 A current range, with up to 100 pA resolution
  • Wide ohms range from 10 Ω to 1 GΩ with up to 10 μΩ resolution
  • 2 x 4 ohms 4-wire measurement technique
  • 8846A also measures capacitance and temperature
  • USB memory drive port (8846A)
  • Fluke 45 and Agilent 34401A emulation
  • Graphical display
  • Trendplot™ paperless recorder mode, statistics, histogram
  • CAT I 1000 V, CAT II 600 V

Technical Specifications
Display VFD Dot Matrix
Resolution 6.5 Digits
V DC
Ranges: 100 mV to 1000 V
Max. Resolution: 100 nV
Accuracy: 8845A: 0.0035 + 0.0005 (% measurement + % of range)
8846A: 0.0024 + 0.0005 (% measurement + % of range)
V AC
Ranges: 8845A: 100 mV to 750 V
8846A: 100 mV to 1000 V
Max. Resolution: 100 nV
Accuracy: 8845A: 0.06 + 0.03 (% measurement + % of range)
8846A: 0.06 + 0.03 (% measurement + % of range)
Frequency: 3 Hz to 300 KHz
Resistance
2×4 Wire: Yes
Ranges: 8845A: 100 Ω to 100 MΩ
8846A: 10 Ω to 1 GΩ
Max. Resolution: 8845A: 100 μΩ
8846A: 10 μΩ
Accuracy: 8845A: 0.010 + 0.001 (% measurement + % of range)
8846A: 0.010 + 0.001 (% measurement + % of range)
A DC
Ranges: 100 μA to 10 A
Max. Resolution: 100 pA
Accuracy: 0.050 + 0.005 (% measurement + % of range)
A AC
Ranges: 8845A: 10 mA to 10 A
8846A: 100 mA to 10 A
Max. Resolution: 8845A: 10 nA
8846A: 100 pA
Accuracy: 0.10 + 0.04 (% measurement + % of range)
Frequency: 3 Hz to 10 kHz
Freq/Period
Ranges: 8845A: 3 Hz to 300 kHz
8846A: 3 Hz to 1 MHz
Max. Resolution: 1 μHz
Accuracy: 0.01 %
Continuity/ Diode Test Yes
Capacitance
Ranges: 8846A: 1 nF to 0.1 F
Max. Resolution: 8846A: 1 pf
Accuracy: 8846A: 1 %
Temperature
Type: 8846A: Platinum RTD
Ranges: 8846A: -200 °C to +600 °
Max. Resolution: 8846A: 0.01 °
Accuracy: 8846A: 0.06 °
Math Functions
NULL, Min/Max/Average, Std Dev
dB/dBm: Yes
Advanced Functions
Statistics/Histogram: Yes
Trendplot: Yes
Limit Test: Yes
Input Output
USB Memory: 8846A: USB memory drive port
Real Time Clock: 8846A: Yes
Interfaces: RS 232, IEE-488.2, Ethernet, USB (with optional adaptor)
Programming Languages/Modes: 8846A: SCPI (IEEE-488.2), Agilent 34401A, Fluke 45

 

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