Fluke 8846A - Memory; Math Functions; Electrical; Remote Interfaces

8845A/8846A
Calibration Manual
1-10
Memory
8845A ................................................................. 5,000 measurements, internal only
8846A ................................................................. 5,000 measurements, internal, and up to 2 Gigabyte capacity with USB
memory module (available separately, see “Accessories”) through
front-panel USB port
Math Functions
Zero, dBm, dB, MX+B, Trend-plot, Histogram, Statistics (min/max/average/standard deviation), and Limit Test
Electrical
Input Protection .................................................... 1000 V all ranges
Overrange .............................................................. 20 % on all ranges except 1000 V dc, 1000 V ac (8846A),
750 V ac (8845A), Diode, and 10 A ranges
Remote Interfaces
RS-232 (RS-232 to USB cable available to connect the Meter to a PC USB port. See Accessories)
IEEE 488.2
LAN
Warranty
One year
Electrical Specifications
Accuracy specifications are valid for 6½ digit resolution mode after at least a 1-hour warm-up with Auto Zero enabled.
24-hour specifications are relative to calibration standards and assume a controlled electromagnetic environment per
EN 61326-1:2000-11
Note
NPLC stands for Number of Power Line Cycles and refers to the number of cycles of the line
voltage.
DC Voltage Specifications
Maximum Input...................................................... 1000 V on any range
Common Mode Rejection..................................... 140 dB at 50 or 60 Hz ±0.1 % (1 kΩ unbalance)
Normal Mode Rejection........................................ 60 dB for NPLC of 1 or greater with dc filter off and power line
frequency ±0.1 %
100 dB for NPLC of 1 or greater with dc filter on and power line
frequency ±0.1 %
Measurement Method ........................................... Multi-ramp A/D
A/D Linearity.......................................................... 0.0002 % of measurement +0.0001 % of range
Input Bias Current................................................. <30 pA at 25 °C
Autozero Off Operation ........................................ Following instrument warm-up at calibration temperature ±1 °C and
less than 10 minutes, add error: 0.0002 % range additional error + 5
μV.
Settling Considerations........................................ Measurement settling times are affected by source impedance, cable
dielectric characteristics, and input signal changes.
Input Characteristics
Resolution
Range Resolution
4½ Digits 5½ Digits 6½ Digits
Input Impedance
100 mV 100.0000 mV 10 µV 1 µV 100 nV
10 MΩ or >10 GΩ
[1]
1 V 1.000000 V 100 µV 10 µV 1 µV
10 MΩ or >10 GΩ
[1]
10 V 10.00000 V 1 mV 100 µV 10 µV
10 MΩ or >10 GΩ
[1]
100 V 100.0000 V 10 mV 1 mV 100 µV
10 MΩ ±1%
1000 V 1,000.000 V 100 mV 10 mV 1 mV
10 MΩ ±1%
[1] Inputs beyond ±14 V are clamped through 200 kΩ typical. 10 MΩ is default input impedance.