Memory; Math Functions; Electrical; Remote Interfaces - Fluke 8845A Calibration Manual

8845A/8846A
Calibration Manual

Memory

8845A ................................................................. 5,000 measurements, internal only
8846A ................................................................. 5,000 measurements, internal, and up to 2 Gigabyte capacity with USB

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),

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
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
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
Settling Considerations........................................ Measurement settling times are affected by source impedance, cable

Input Characteristics

Range Resolution
100 mV 100.0000 mV
1 V 1.000000 V
10 V 10.00000 V
100 V 100.0000 V
1000 V 1,000.000 V
[1] Inputs beyond ±14 V are clamped through 200 kΩ typical. 10 MΩ is default input impedance.
1-10
memory module (available separately, see "Accessories") through
front-panel USB port
750 V ac (8845A), Diode, and 10 A ranges
Note
frequency ±0.1 %
100 dB for NPLC of 1 or greater with dc filter on and power line
frequency ±0.1 %
less than 10 minutes, add error: 0.0002 % range additional error + 5
μV.
dielectric characteristics, and input signal changes.
Resolution
4½ Digits 5½ Digits
10 µV 1 µV
100 µV 10 µV
1 mV 100 µV
10 mV 1 mV
100 mV 10 mV
Input Impedance
6½ Digits
100 nV
10 MΩ or >10 GΩ
1 µV
10 MΩ or >10 GΩ
10 µV
10 MΩ or >10 GΩ
100 µV 10 MΩ ±1%
10 MΩ ±1%
1 mV
[1]
[1]
[1]