Datasheet

2 Fluke Corporation 8845A and 8846A
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 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
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
Full Scale
(6½ Digits)
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.
8846A Accuracy
Accuracy is given as ± (% measurement + % of range)
Range
24 Hour
(23 ± 1 °C)
90 Days
(23 ± 5 °C)
1 Year
(23 ± 5 °C)
Temperature
Coefficient/ °C
Outside 18 to 28 °C
100 mV 0.0025 + 0.003 0.0025 + 0.0035 0.0037 + 0.0035 0.0005 + 0.0005
1 V 0.0018 + 0.0006 0.0018 + 0.0007 0.0025 + 0.0007 0.0005 + 0.0001
10 V 0.0013 + 0.0004 0.0018 + 0.0005 0.0024 + 0.0005 0.0005 + 0.0001
100 V 0.0018 + 0.0006 0.0027 + 0.0006 0.0038 + 0.0006 0.0005 + 0.0001
1000 V 0.0018 + 0.0006 0.0031 + 0.001 0.0041 + 0.001 0.0005 + 0.0001
8845A Accuracy
Accuracy is given as ± (% measurement + % of range)
Range
24 Hour
(23 ± 1 °C)
90 Days
(23 ± 5 °C)
1 Year
(23 ± 5 °C)
Temperature
Coefficient/ °C
Outside 18 to 28 °C
100 mV 0.003 + 0.003 0.004 + 0.0035 0.005 + 0.0035 0.0005 + 0.0005
1 V 0.002 + 0.0006 0.003 + 0.0007 0.004 + 0.0007 0.0005 + 0.0001
10 V 0.0015 + 0.0004 0.002 + 0.0005 0.0035 + 0.0005 0.0005 + 0.0001
100 V 0.002 + 0.0006 0.0035 + 0.0006 0.0045 + 0.0006 0.0005 + 0.0001
1000 V 0.002 + 0.0006 0.0035 + 0.0010 0.0045 + 0.0010 0.0005 + 0.0001