Fluke 8845A/8846A
Digital Multimeters
Extended Specifications
The Fluke 8845A and 8846A 6.5 digit precision multime-
ters have the precision and versatility to handle your most
demanding measurements, on the bench or in a system.
These meters are both high performance and feature rich,
yet also remarkably easy to use.
These digital multimeters
perform the functions you would
expect to see in a multifunction
DMM, including measuring
volts, ohms, and amps, with
performance that exceeds expec-
tations. Basic V dc accuracy of
up to 0.0024 %, 10 A current
range, and a wide ohms range
from 10 W to 1 GW with up
to 10 μW resolution give you
an unbeatable combination of
measurement capability.
You can also use the 8845A
and 8846A to measure tempera-
ture, capacitance, period, and
frequency—the functions of a
counter, capacitance meter, and
thermometer are built in for
unparalleled versatility. Extend
the meters’ utility even more
with their graphical display
modes, including Trendplot™
paperless recorder mode, statis-
tics and histograms—features you
won’t find on other multimeters.
Of course, these meters are
also durable and dependable,
features you expect from any
Fluke meter. This unique combi-
nation of features and perfor-
mance makes the 8845A and
8846A an unbeatable value for
a wide variety of applications,
including manufacturing test,
research and development, and
service.
Features at a glance
• 6.5 digit resolution
• Basic V dc accuracy of up to 0.0024 % (1 yr.)
• Dual display
• 100 μA to 10 A current range, with up to 100 pA resolution
• Wide ohms ranges from 10 W to 1 GW with up to 10 μW resolution
• 2 x 4 ohms 4-wire measurement technique
• Both models measure frequency and period
• 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
8845A and 8846A Fluke Corporation 1
General Specifications
Power
Voltage
100 V Setting............................................................. 90 V to 110 V
120 V Setting............................................................. 108 V to 132 V
220 V Setting............................................................. 198 V to 242 V
240 V Setting............................................................. 216 V to 264 V
Frequency........................................................................ 47 Hz to 440 Hz. Automatically sensed at power-on.
Power Consumption....................................................... 28 VA peak (12 Watt average)
Dimensions
Height .............................................................................. 88 mm (3.46 in.)
Width ............................................................................... 217 mm (8.56 in.)
Depth................................................................................ 297 mm (11.7 in.)
Weight ............................................................................. 3.6 kg (8.0 lb)
Shipping Weight ............................................................ 5.0 kg (11.0 lb)
Display
Vacuum Fluorescent Display, dot matrix
Environment
Temperature
Operating.................................................................... 0 °C to 55 °C
Storage........................................................................ -40 °C to 70 °C
Warm Up..................................................................... 1 hour to full uncertainty specifications
Relative Humidity (non-condensing)
Operating.................................................................... 0 °C to 28 °C <90 %
28 °C to 40 °C <80 %
40 °C to 55 °C <50 %
Storage........................................................................ -40 °C to 70 °C <95 %
Altitude
Operating.................................................................... 2,000 Meters
Storage........................................................................ 12,000 Meters
Vibration and Shock......................................................Complies with Mil-T-28800F Type III, Class 5 (Sine only)
Safety
Designed to comply with IEC 61010-1:2000-1, UL 61010-1A1, CAN/CSA-C22.2 No. 61010.1, CAT I 1000V/CAT II 600V
EMC
Designed to comply with IEC 61326-1:2000-11 (EMC) when used with shielded communications cables. This Meter has shown
susceptibility to radiated frequencies gr eater than 1 V/m from 250 to 450 MHz.
Triggering
Samples per Trigger..................................................1 to 50,000
Trigger Delay..............................................................0 s to 3600 s; in 10 µS increments
External Trigger Delay..............................................<1 mS
External Trigger Jitter...............................................<500 µS
Trigger Input..............................................................TTL Levels
Trigger Output............................................................5 V maximum (open collector)
Memory
8845A.........................................................................10,000 measurements, internal only
8846A.........................................................................10,000 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, Offset, DCV ratio and TrendPlot, Histogram, Statistics (min/max/average/standard deviation), and Limit Test
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-232C, DTE 9-pin, 1200 to 230400 baud (RS-232C to USB cable available to connect the Meter to a PC USB port. See Accessories)
IEEE 488.2
LAN and “Ethernet 10/100 base T with DHCP (for IP_ADDRess) option”
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
DC Voltage Specifications
Maximum Inpu t.............................................................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 analog filter off and power line frequency ±0.1 %
100 dB for NPLC of 1 or greater with analog 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.
Analog Filter..................................................................When using the analog filter, specifications are relative to within one h our of using the
ZERO function for that range and NPLC setting.
DC Ratio..........................................................................Accuracy is +/- (Input accurac y + Reference accuracy), where Input accuracy = DC
Voltage accuracy for the HI to LO Input (in ppm of the Input voltage), and Reference
accuracy = DC Voltage accuracy for the HI to LO (Sense) Reference (in ppm of the
Reference voltag e).
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.
8846A Accuracy
Accuracy is given as ± (% measure ment + % 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 and 8846A Fluke Corporation 3
8845A Accuracy
Accuracy is given as ± (% measure ment + % 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
Additional Errors
Digits NPLC Additional NPLC Noise Error
6½ 100 0 % of range
6½ 10 0 % of range
5½ 1 0.001 % of range
5½ .2 0.0025 % of range +12 μV
4½ 0.02 0.017 % of range +17 μV
AC Voltage Specifications
AC Voltage specifications are for ac sinewave signals >5 % of range. For inputs from 1 % to 5 % of range and <50 kHz, add an additional
error of 0.1 % of range, and for 50 kHz to 100 kHz, add 0.13 % of range.
Maximum Input.............................................................750 V rms or 1000 V peak (8845A), 1000 V rms or 1414 V peak (8846A) or 8 x 107
volts-Hertz product (whichever is less) for any range.
Measurement Method..................................................AC-coupled true-rms. Measures the ac component of input with up to 1000 V dc bias on
any range.
AC Filter Bandwidth:
Slow.............................................................................3 Hz – 300 kHz
Medium.......................................................................20 Hz – 300 kHz
Fast..............................................................................200 Hz – 300 kHz
Common Mode Rejection............................................70 dB at 50 Hz or 60 Hz ±0.1 % (1 kΩ unbalance)
Crest Factor Error (applies to non-sinusoidal wavefo rms only)
Maximum Crest Factor..............................................5:1 at Full Scale
Additional Crest Factor Errors (<100 Hz)...............Crest factor 1-2, 0.05 % of full scale
Crest factor 2-3, 0.2 % of full scale
Crest factor 3-4, 0.4 % of full scale
Crest factor 4-5, 0.5 % of full scale
Input Characteristics Resolution
Range Resolution 4½ Digits 5½ Digits 6½ Digits Input Impedance
100 mV 100.0000 mV 10 µV 1 µV 100 nV
1 V 1.000000 V 100 µV 10 µV 1 µV
10 V 10.00000 V 1 mV 100 µV 10 µV
100 V 100.0000 V 10 mV 1 mV 100 µV
1000 V 1,000.000 V 100 mV 10 mV 1 mV
1 MΩ ±2 % shunted
by <100 pf
8846A Accuracy
Accuracy is given as ± (% measure ment + % of range)
Range Frequency 24 Hour
(23 ±1 °C) 90 Days
(23 ±5 °C) 1 Year
(23 ±5 °C) Temperature
Coefficient/ °C
Outside 18 to 28 °C
3 – 5 Hz 1.0 + 0.03 1.0 + 0.04 1.0 + 0.04 0.1 + 0.004
5 – 10 Hz 0.35 + 0.03 0.35 + 0.04 0.35 + 0.04 0.035 + 0.004
10 Hz – 20 kHz 0.04 + 0.03 0.05 + 0.04 0.06 + 0.04 0.005 + 0.004
20 – 50 kHz 0.1 + 0.05 0.11 + 0.05 0.12 + 0.05 0.011 + 0.005
50 – 100 kHz 0.55 + 0.08 0.6 + 0.08 0.6 + 0.08 0.06 + 0.008
100 mV
100 – 300 kHz[1] 4.0 + 0.50 4.0 + 0.50 4.0 + 0.50 0.20 + 0.02
3 – 5 Hz 1.0 + 0.02 1.0 + 0.03 1.0 + 0.03 0.1 + 0.003
5 – 10 Hz 0.35 + 0.02 0.35 + 0.03 0.35 + 0.03 0.035 + 0.003
10 Hz – 20 kHz 0.04 + 0.02 0.05 + 0.03 0.06 + 0.03 0.005 + 0.003
20 – 50 kHz 0.1 + 0.04 0.11 + 0.05 0.12 + 0.05 0.011 + 0.005
50 – 100 kHz 0.55 + 0.08 0.6 + 0.08 0.6 + 0.08 0.06 + 0.008
1 V
100 – 300 kHz[1] 4.0 + 0.50 4.0 + 0.50 4.0 + 0.50 0.2 + 0.02
4 Fluke Corporation 8845A and 8846A
Range Frequency 24 Hour
(23 ±1 °C) 90 Days
(23 ±5 °C) 1 Year
(23 ±5 °C) Temperature
Coefficient/ °C
Outside 18 to 28 °C
3 – 5 Hz 1.0 + 0.02 1.0 + 0.03 1.0 + 0.03 0.1 + 0.003
5 – 10 Hz 0.35 + 0.02 0.35 + 0.03 0.35 + 0.03 0.035 + 0.003
10 Hz – 20 kHz 0.04 + 0.02 0.05 + 0.03 0.06 + 0.03 0.005 + 0.003
20 – 50 kHz 0.1 + 0.04 0.11 + 0.05 0.12 + 0.05 0.011 + 0.005
50 – 100 kHz 0.55 + 0.08 0.6 + 0.08 0.6 + 0.08 0.06 + 0.008
10 V
100 – 300 kHz[1] 4.0 + 0.50 4.0 + 0.50 4.0 + 0.50 0.2 + 0.02
3 – 5 Hz 1.0 + 0.02 1.0 + 0.03 1.0 + 0.03 0.1 + 0.003
5 – 10 Hz 0.35 + 0.02 0.35 + 0.03 0.35 + 0.03 0.035 + 0.003
10 Hz – 20 kHz 0.04 + 0.02 0.05 + 0.03 0.06 + 0.03 0.005 + 0.003
20 – 50 kHz 0.1 + 0.04 0.11 + 0.05 0.12 + 0.05 0.011 + 0.005
50 – 100 kHz 0.55 + 0.08 0.6 + 0.08 0.6 + 0.08 0.06 + 0.008
100 V
100 –- 300 kHz[1] 4.0 + 0.50 4.0 + 0.50 4.0 + 0.50 0.2 + 0.02
3 – 5 Hz 1.0 + 0.015 1.0 + 0.0225 1.0 +
0.0225 0.1 + 0.00225
5 – 10 Hz 0.35 + 0.015 0.35 + 0.0225 0.35 + 0.0225 0.035 + 0.00225
10 Hz – 20 kHz 0.04 + 0.015 0.05 + 0.0225 0.06 + 0.0225 0.005 + 0.00225
20 – 50 kHz 0.1 + 0.03 0.11 + 0.0375 0.12 + 0.0375 0.011 + 0.00375
50 – 100 kHz[2] 0.55 + 0.06 0.6 + 0.06 0.6 + 0.06 0.06 + 0.006
1000 V
100 – 300 kHz[1][2] 4.0 + 0.375 4.0 + 0.375 4.0 + 0.375 0.2 + 0.015
[1] Typically 30 % reading error at 1 MHz
[2] 1000 Volt range is limited to 8 X 107 volt-Her tz
8845A Accuracy
Accuracy is given as ± (% measure ment + % of range)
Range Frequency
(Hz) 24 Hour
(23 ±1 °C) 90 Days
(23 ±5 °C) 1 Year
(23 ±5 °C) Temperature
Coefficient/ °C
Outside 18 to 28 °C
3 – 5 Hz 1.0 + 0.03 1.0 + 0.04 1.0 + 0.04 0.10 + 0.004
5 – 10 Hz 0.35 + 0.03 0.35 + 0.04 0.35 + 0.04 0.035 + 0.004
10 Hz – 20 kHz 0.04 + 0.03 0.05 + 0.04 0.06 + 0.04 0.005 + 0.004
20 – 50 kHz 0.1 + 0.05 0.11 + 0.05 0.12 + 0.05 0.011 + 0.005
50 – 100 kHz 0.55 + 0.08 0.6 + 0.08 0.6 + 0.08 0.06 + 0.008
100 mV
100 – 300 kHz[1] 4.0 + 0.50 4.0 + 0.50 4.0 + 0.50 0.2 + 0.02
3 – 5 Hz 1.0 + 0.02 1.0 + 0.03 1.0 + 0.03 0.1 + 0.003
5 – 10 Hz 0.35 + 0.02 0.35 + 0.03 0.35 + 0.03 0.035 + 0.003
10 Hz – 20 kHz 0.04 + 0.02 0.05 + 0.03 0.06 + 0.03 0.005 + 0.003
20 – 50 kHz 0.1 + 0.04 0.11 + 0.05 0.12 + 0.05 0.011 + 0.005
50 – 100 kHz 0.55 + 0.08 0.6 + 0.08 0.6 + 0.08 0.06 + 0.008
1 V
100 – 300 kHz[1] 4.0 + 0.50 4.0 + 0.50 4.0 + 0.50 0.2 + 0.02
3 – 5 Hz 1.0 + 0.02 1.0 + 0.03 1.0 + 0.03 0.1 + 0.003
5 – 10 Hz 0.35 + 0.02 0.35 + 0.03 0.35 + 0.03 0.035 + 0.003
10 Hz – 20 kHz 0.04 + 0.02 0.05 + 0.03 0.06 + 0.03 0.005 + 0.003
20 – 50 kHz 0.1 + 0.04 0.11 + 0.05 0.12 + 0.05 0.011 + 0.005
50 – 100 kHz 0.55 + 0.08 0.6 + 0.08 0.6 + 0.08 0.06 + 0.008
10 V
100 – 300 kHz[1] 4.0 + 0.50 4.0 + 0.50 4.0 + 0.50 0.2 + 0.02
3 – 5 Hz 1.0 + 0.02 1.0 + 0.03 1.0 + 0.03 0.1 + 0.003
5 – 10 Hz 0.35 + 0.02 0.35 + 0.03 0.35 + 0.03 0.035 + 0.003
10 Hz – 20 kHz 0.04 + 0.02 0.05 + 0.03 0.06 + 0.03 0.005 + 0.003
20 – 50 kHz 0.1 + 0.04 0.11 + 0.05 0.12 + 0.05 0.011 + 0.005
50 – 100 kHz 0.55 + 0.08 0.6 + 0.08 0.6 + 0.08 0.06 + 0.008
100 V
100 – 300 kHz[1] 4.0 + 0.50 4.0 + 0.50 4.0 + 0.50 0.2 + 0.02
3 –- 5 Hz 1.0 + 0.02 1.0 + 0.03 1.0 + 0.03 0.1 + 0.003
5 – 10 Hz 0.35 + 0.02 0.35 + 0.03 0.35 + 0.03 0.035 + 0.003
10 Hz – 20 kHz 0.04 + 0.02 0.05 + 0.03 0.06 + 0.03 0.005 + 0.003
20 – 50 kHz 0.1 + 0.04 0.11 + 0.05 0.12 + 0.05 0.011 + 0.005
50 – 100 kHz [2] 0.55 + 0.08 0.6 + 0.08 0.6 + 0.08 0.06 + 0.008
750 V
100 – 300 kHz[1] [2] 4.0 + 0.5 4.0 + 0.5 4.0 + 0.5 0.2 + 0.02
[1] Typically 30 % reading error at 1 MHz
[2] 750 Volt range is limited to 8 X 107 volt-Hertz
8845A and 8846A Fluke Corporation 5
Additional Low Frequency Errors
Error is stated as % of reading. AC Filter
Frequency 3HZ (slow) 20HZ (medium) 200HZ (fast)
10 – 20 Hz 0 0.25 –
20 – 40 Hz 0 0.02 –
40 – 100 Hz 0 0.01 0.55
100 – 200 Hz 0 0 0.2
200 Hz – 1 kHz 0 0 0.02
>1 kHz 0 0 0
Resistance
Specifications are for 4-wire resistance function, 2 x 4-wire resistance, or 2-wire resistance with zero. If zero is not used, add 0.2 Ω for 2-
wire resistance plus lead resistan ce, and add 20 mΩ for 2 x 4-wire resistance function.
Measurement Method..................................................Current source referenced to LO input
Max. Lead Resistance (4-wire ohms)......................10 % of range pe r lead for 10 Ω, 100 Ω, 1 kΩ ranges. 1 kΩ per lead on all other ranges
Input Protection............................................................1000 V on all ranges
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 analog filter off and power line frequency ±0.1 %
100 dB for NPLC of 1 or greater with analog filter on and power line frequency ±0.1 %
Analog Filter..................................................................When using the analog filter, specifications are relative to within one h our of using the
ZERO function for that range and NPLC setting.
Input Characteristics Resolution
Range Resolution 4½ Digits 5½ Digits 6½ Digits Source Current
10 Ω[1] 10.00000 Ω 1 mΩ 100 μΩ 10 μΩ 5 mA/13 V
100 Ω 100.0000 Ω 10 mΩ 1 mΩ 100 μΩ 1 mA/6 V
1 kΩ 1.000000 kΩ 100 mΩ 10 mΩ 1 mΩ 1 mA/6 V
10 kΩ 10.00000 kΩ 1 Ω 100 mΩ 10 mΩ 100 μA/6 V
100 kΩ 100.0000 kΩ 10 Ω 1 Ω 100 mΩ 100 μA/13 V
1 MΩ 1.000000 MΩ 100 Ω 10 Ω 1 Ω 10 μA/13 V
10 MΩ 10.00000 MΩ 1 kΩ 100 Ω 10 Ω 1 μA/13 V
100 MΩ 100.0000 MΩ 10 kΩ 1 kΩ 100 Ω 1 μA || 10 MΩ/10 V
1.0 GΩ[1] 1.000000 GΩ 100 kΩ 10 kΩ 1 kΩ 1 μA || 10 MΩ/10 V
[1] 8846A Only
8846A Accuracy
Accuracy is given as ± (% measure ment + % of range)
Range 24 Hour
(23 ±1 °C) 90 Days
(23 ±5 °C) 1 Ye ar
(23 ±5 °C) Temperature
Coefficient/ °C
Outside 18 to 28 °C
10 Ω 0.003 + 0.01 0.008 + 0.03 0.01+ 0.03 0.0006 + 0.0005
100 Ω 0.003 + 0.003 0.008 + 0.004 0.01 + 0.004 0.0006 + 0.0005
1 kΩ 0.002 + 0.0005 0.008 + 0.001 0.01 + 0.001 0.0006 + 0.0001
10 kΩ 0.002 + 0.0005 0.008 + 0.001 0.01 + 0.001 0.0006 + 0.0001
100 kΩ 0.002 + 0.0005 0.008 + 0.001 0.01 + 0.001 0.0006 + 0.0001
1 MΩ 0.002 + 0.001 0.008 + 0.001 0.01 + 0.001 0.001 + 0.0002
10 MΩ 0.015 + 0.001 0.02 + 0.001 0.04 + 0.001 0.003 + 0.0004
100 MΩ 0.3 + 0.01 0.8 + 0.01 0.8 + 0.01 0.15 + 0.0002
1 GΩ 1.0 + 0.01 1.5 + 0.01 2.0 + 0.01 0.6 + 0.0002
8845A Accuracy
Accuracy is given as ± (% measure ment + % of range)
Range 24 Hour
(23 ±1 °C) 90 Days
(23 ±5 °C) 1 Ye ar
(23 ±5 °C) Temperature
Coefficient/ °C
Outside 18 to 28 °C
100 Ω 0.003 + 0.003 0.008 + 0.004 0.01 + 0.004 0.0006 + 0.0005
1 kΩ 0.002 + 0.0005 0.008 + 0.001 0.01 + 0.001 0.0006 + 0.0001
10 kΩ 0.002 + 0.0005 0.008 + 0.001 0.01 + 0.001 0.0006 + 0.0001
100 kΩ 0.002 + 0.0005 0.008 + 0.001 0.01 + 0.001 0.0006 + 0.0001
1 MΩ 0.002 + 0.001 0.008 + 0.001 0.01 + 0.001 0.0010 + 0.0002
10 MΩ 0.015 + 0.001 0.02 + 0.001 0.04 + 0.001 0.0030 + 0.0004
100 MΩ 0.3 + 0.01 0.8 + 0.01 0.8 + 0.01 0.1500 + 0.0002
6 Fluke Corporation 8845A and 8846A
Additional Ohms Errors
Digits NPLC Additional NPLC Noise Error
6½ 100 0 % of range
6½ 10 0 % of range
5½ 1 0.001 % of range
5½ 0.2 0.003 % of range ±7 mΩ
4½ 0.02 0.017 % of range ±15 mΩ
DC Current
Input Protection............................................................Tool-accessible 11 A/1000 V and 440 mA/1000 V fuses, limits of 400 mA continuous
550 mA for 2 minutes on, 1 minute off.
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 analog filter off and power line frequency ±0.1 %
100 dB for NPLC of 1 or greater with analog filter on and power line frequency ±0.1 %
Analog Filter..................................................................When using the analog filter, specifications are relative to within one h our of using the
ZERO function for that range and NPLC setting.
Input Characteristics Resolution
Range Resolution
4½ Digits 5½ Digits 6½ Digits Shunt Resistance
(Ohms) Burden Voltage
100 µA 100.0000 µA 10 nA 1 nA 100 pA 100 Ω <0.015 V
1 mA 1.000000 mA 100 nA 10 nA 1 nA 100 Ω <0.15 V
10 mA 10.00000 mA 1 μA 100 nA 10 nA 1 Ω <0.025 V
100 mA 100.0000 mA 10 µA 1 μA 100 nA 1 Ω <0.25 V
400 mA [3] 400.000 mA 100 µA 10 µA 1 μA 1 Ω <0.50 V
1 A [2] 1.000000 A 100 µA 10 µA 1 μA 0.01 Ω <0.05 V
3 A[1] 3.00000A 1 mA 100 µA 10 µA 0.01 Ω <0.15 V
10 A 10.00000 A 1 mA 100 µA 10 µA 0.01 Ω <0.5 V
[1] Part of 10 A range.
[2] Available on the front panel terminal only.
[3] 400 mA available in software version 2.0 or greater only. 400 mA continuously; 550 mA for 2 minutes on, 1 minute off.
Accuracy (8846A)
Accuracy is given as ± (% measure ment + % 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 µA 0.01 + 0.02 0.04 + 0.025 0.05 + 0.025 0.002 + 0.003
1 mA 0.007 + 0.005 0.030 + 0.005 0.05 + 0.005 0.002 + 0.0005
10 mA 0.007 + 0.02 0.03 + 0.02 0.05 + 0.02 0.002 + 0.002
100 mA 0.01 + 0.004 0.03 + 0.005 0.05 + 0.005 0.002 + 0.0005
400 mA [3] 0.03 + 0.004 0.04 + 0.005 0.05 + 0.005 0.005 + 0.0005
1 A[2] 0.03 + 0.02 0.04 + 0.02 0.05 + 0.02 0.005 + 0.001
3 A[1][2] 0.05 + 0.02 0.08 + 0.02 0.1 + 0.02 0.005 + 0.002
10 A[2] 0.1 + 0.008 0.12 + 0.008 0.15 + 0.008 0.005 + 0.0008
[1] Part of 10 A range
[2] Available at front panel connectors only
[3] 400 mA available in software version 2.0 or greater only. 400 mA continuously; 550 mA for 2 minutes on,
1 minute off.
8845A and 8846A Fluke Corporation 7
Accuracy (8845A)
Accuracy is given as ± (% measure ment + % 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 µA 0.01 + 0.02 0.04 + 0.025 0.05 + 0.025 0.002 + 0.003
1 mA 0.007 + 0.005 0.030 + 0.005 0.05 + 0.005 0.002 + 0.0005
10 mA 0.007 + 0.02 0.03 + 0.02 0.05 + 0.02 0.002 + 0.002
100 mA 0.01 + 0.004 0.03 + 0.005 0.05 + 0.005 0.002 + 0.0005
400 mA [3] 0.03 + 0.004 0.04 + 0.005 0.05 + 0.005 0.005 + 0.0005
1 A[2] 0.03 + 0.02 0.04 + 0.02 0.05 + 0.02 0.005 + 0.001
3 A[1][2] 0.05 + 0.02 0.08 + 0.02 0.10 + 0.02 0.005 + 0.002
10 A[2] 0.10 + 0.008 0.12 + 0.008 0.15 + 0.008 0.005 + 0.0008
[1] Part of 10 A range
[2] Available at front panel connectors only
[3] 400 mA available in software version 2.0 or greater only. 400 mA continuously; 550 mA for 2 minutes on,
1 minute off.
Additional Current Errors
Digits NPLC Additional NPLC Noise Error for 1
mA, 100 mA, 400 mA, 3A and 10A Additional NPLC Noise Error
for 100 μA, 10 mA, 1A
6½ 100 0 % of range 0 % of range
6½ 10 0 % of range 0 % of range
5½ 1 0.001 % of range 0.01 % of range
5½ 0.2 0.011 % of range ±4 μA 0.11 % of range ±4 μA
4½ 0.02 0.04 % of range ±4 μA 0.28 % of range ±4 μA
AC Current
The following ac current specifications are for sinusoidal signals wit h amplitudes greater than 5 % of range. For inputs from 1 % to 5 % of
range, add an additional error of 0.1 % of range.
Input Protection............................................................Tool accessible 1 1 A/1000 V and 440 mA/1000 V fuses, limits of 400 mA continuous 550
mA for 2 minutes on, 1 minute off.
Measurement Method..................................................ac-coupled true-rms, dc-coupled to the fuse and shunt (no blocking capacitor)
AC Filter Bandwidth
Slow.............................................................................3 Hz to 10 kHz
Medium.......................................................................20 Hz to 10 kHz
Fast..............................................................................200 Hz to 10 kHz
Crest Factor Error (applies to non-sinusoidal wavefo rms only)
Maximum Crest Factor ...........................................5:1 at full scale
Additional Crest Factor Errors (<100 Hz)..........Crest factor 1-2, 0.05 % of full scale
Crest factor 2-3, 0.2 % of full scale
Crest factor 3-4, 0.4 % of full scale
Crest factor 4-5, 0.5 % of full scale
Input Characteristics Resolution
Range Resolution
4½ Digits 5½ Digits 6½ Digits Shunt Resistance
(Ohms) Burden Voltage
100 μA[1] 100.0000 μA 10 nA 1 nA 100 pA 100 Ω <0.015 V
1 mA[1] 1.000000 mA 100 nA 10 nA 1 nA 100 Ω <0.15 V
10 mA 10.00000 mA 1 μA 100 nA 10 nA 1 Ω <0.025 V
100 mA 100.0000 mA 10 µA 1 μA 100 nA 1 Ω <0.25 V
400 mA [4] 400.000 mA 100 µA 10 µA 1 μA 1 Ω <0.50 V
1 A[3] 1.000000 A 100 µA 10 µA 1 μA 0.01 Ω <0.05 V
3 A[2][3] 3.00000 A 1 mA 100 µA 10 μA 0.01 Ω <0.05 V
10 A[3] 10.00000 A 1 mA 100 µA 10 µA 0.01 Ω <0.5 V
[1] 8846A Only
[2] Part of 10 A range
[3] Available at front panel connectors only
[4] 400 mA available in software version 1.0.700.18 or greater only. 400 mA continuously; 550 mA for 2 minutes on, 1
minute off; maximum crest factor 3:1 at 400mA
8 Fluke Corporation 8845A and 8846A
8846A Accuracy
Accuracy is given as ± (% measure ment + % of range)
Range Frequency
(Hz) 24 Hour
(23 ±1 °C) 90 Days
(23 ±5 °C) 1 Year
(23 ±5 °C) Temperature
Coefficient/ °C
Outside 18 to 28 °C
3 – 5 Hz 1.1 + 0.06 1.1 + 0.06 1.1 + 0.06 0.2 + 0.006
5 – 10 Hz 0.35 + 0.06 0.35 + 0.06 0.35 + 0.06 0.1 + 0.006
10 Hz – 5 kHz 0.15 + 0.06 0.15 + 0.06 0.15 + 0.06 0.015 + 0.006
100 μA
5 – 10 kHz 0.35 + 0.7 0.35 + 0.7 0.35 + 0.7 0.03 + 0.006
3 – 5 Hz 1.0 + 0.04 1.0 + 0.04 1.0 + 0.04 0.1 + 0.006
5 – 10 Hz 0.3 + 0.04 0.3 + 0.04 0.3 + 0.04 0.035 + 0.006
10 Hz – 5 kHz 0.1 + 0.04 0.1 + 0.04 0.1 + 0.04 0.015 + 0.006
1 mA
5 – 10 kHz 0.2 + 0.25 0.2 + 0.25 0.2 + 0.25 0.03 + 0.006
3 – 5 Hz 1.1 + 0.06 1.1 + 0.06 1.1 + 0.06 0.2 + 0.006
5 – 10 Hz 0.35 + 0.06 0.35 + 0.06 0.35 + 0.06 0.1 + 0.006
10 Hz – 5 kHz 0.15 + 0.06 0.15 + 0.06 0.15+ 0.06 0.015 + 0.006
10 mA
5 – 10 kHz 0.35 + 0.7 0.35 + 0.7 0.35 + 0.7 0.03 + 0.006
3 – 5 Hz 1.0 + 0.04 1.0 + 0.04 1.0 + 0.04 0.1 + 0.006
5 – 10 Hz 0.3 + 0.04 0.3 + 0.04 0.3 + 0.04 0.035 + 0.006
10 Hz – 5 kHz 0.1 + 0.04 0.1 + 0.04 0.1 + 0.04 0.015 + 0.006
100 mA
5 – 10 kHz 0.2 + 0.25 0.2 + 0.25 0.2 + 0.25 0.03 + 0.006
3 – 5 Hz 1.0 + 0.1 1.0 + 0.1 1.0 + 0.1 0.1 + 0.006
5 – 10 Hz 0.3 + 0.1 0.3 + 0.1 0.3 + 0.1 0.035 + 0.006
10 Hz – 1 kHz 0.1 + 0.1 0.1 + 0.1 0.1 + 0.1 0.015 + 0.006
400 mA [3]
1kHz – 10 kHz 0.2 + 0.7 0.2 + 0.7 0.2 + 0.7 0.03 + 0.006
3 – 5 Hz 1.0 + 0.04 1.0 + 0.04 1.0 + 0.04 0.1 + 0.006
5 – 10 Hz 0.3 + 0.04 0.3 + 0.04 0.3 + 0.04 0.035 + 0.006
10 Hz – 5 kHz 0.1 + 0.04 0.1 + 0.04 0.1 + 0.04 0.015 + 0.006
1 A[2]
5 – 10 kHz 0.35 + 0.7 0.35 + 0.7 0.35 + 0.7 0.03 + 0.006
3 – 5 Hz 1.1 + 0.06 1.1 + 0.06 1.1 + 0.06 0.1 + 0.006
5 – 10 Hz 0.35 + 0.06 0.35 + 0.06 0.35 + 0.06 0.035 + 0.006
10 Hz – 5 kHz 0.15 + 0.06 0.15 + 0.06 0.15 + 0.06 0.015 + 0.006
3 A[1][2]
5 – 10 kHz 0.35 + 0.7 0.35 + 0.7 0.35 + 0.7 0.03 + 0.006
3 – 5 Hz 1.1 + 0.06 1.1 + 0.06 1.1 + 0.06 0.1 + 0.006
5 – 10 Hz 0.35 + 0.06 0.35 + 0.06 0.35 + 0.06 0.035 + 0.006
10 Hz – 5 kHz 0.15 + 0.06 0.15 + 0.06 0.15 + 0.06 0.015 + 0.006
10 A[2]
5 – 10 kHz 0.35 + 0.7 0.35 + 0.7 0.35 + 0.7 0.03 + 0.006
[1] Part of 10 A range
[2] Available only on front panel connectors
[3] 400 m available in software version 1.0.700.18 or greater only. 400 mA continuously; 550 mA for 2 minutes on, 1
minute off; maximum crest factor 3:1 at 400mA; specification for current above 329 mA is typical.
8845A Accuracy
Accuracy is given as ± (% measure ment + % of range)
Range Frequency
(Hz) 24 Hour
(23 ±1 °C) 90 Days
(23 ±5 °C) 1 Year
(23 ±5 °C) Temperature
Coefficient/ °C
Outside 18 to 28 °C
3 – 5 Hz 1.1 + 0.06 1.1 + 0.06 1.1 + 0.06 0.2 + 0.006
5 – 10 Hz 0.35 + 0.06 0.35 + 0.06 0.35 + 0.06 0.1 + 0.006
10 Hz – 5 kHz 0.15 + 0.06 0.15 + 0.06 0.15+ 0.06 0.015 + 0.006
10 mA
5 – 10 kHz 0.35 + 0.7 0.35 + 0.7 0.35 + 0.7 0.03 + 0.006
3 – 5 Hz 1.0 + 0.04 1.0 + 0.04 1.0 + 0.04 0.1 + 0.006
5 – 10 Hz 0.3 + 0.04 0.3 + 0.04 0.3 + 0.04 0.035 + 0.006
10 Hz – 5 kHz 0.1 + 0.04 0.1 + 0.04 0.1 + 0.04 0.015 + 0.006
100 mA
5 – 10 kHz 0.2 + 0.25 0.2 + 0.25 0.2 + 0.25 0.03 + 0.006
3 – 5 Hz 1.0 + 0.1 1.0 + 0.1 1.0 + 0.1 0.1 + 0.006
5 – 10 Hz 0.3 + 0.1 0.3 + 0.1 0.3 + 0.1 0.035 + 0.006
10 Hz – 1 kHz 0.1 + 0.1 0.1 + 0.1 0.1 + 0.1 0.015 + 0.006
400 mA [3]
1kHz – 10 kHz 0.2 + 0.7 0.2 + 0.7 0.2 + 0.7 0.03 + 0.006
3 – 5 Hz 1.0 + 0.04 1.0 + 0.04 1.0 + 0.04 0.1 + 0.006
5 – 10 Hz 0.3 + 0.04 0.3 + 0.04 0.3 + 0.04 0.035 + 0.006
10 Hz – 5 kHz 0.1 + 0.04 0.1 + 0.04 0.1 + 0.04 0.015 + 0.006
1 A[2]
5 – 10 kHz 0.35 + 0.7 0.35 + 0.7 0.35 + 0.7 0.03 + 0.006
8845A and 8846A Fluke Corporation 9
Range Frequency
(Hz) 24 Hour
(23 ±1 °C) 90 Days
(23 ±5 °C) 1 Year
(23 ±5 °C) Temperature
Coefficient/ °C
Outside 18 to 28 °C
3 – 5 Hz 1.1 + 0.06 1.1 + 0.06 1.1 + 0.06 0.1 + 0.006
5 – 10 Hz 0.35 + 0.06 0.35 + 0.06 0.35 + 0.06 0.035 + 0.006
10 Hz – 5 kHz 0.15 + 0.06 0.15 + 0.06 0.15 + 0.06 0.015 + 0.006
3 A[1][2]
5 – 10 kHz 0.35 + 0.7 0.35 + 0.7 0.35 + 0.7 0.03 + 0.006
3 – 5 Hz 1.1 + 0.06 1.1 + 0.06 1.1 + 0.06 0.2 + 0.006
5 – 10 Hz 0.35 + 0.06 0.35 + 0.06 0.35 + 0.06 0.035 + 0.006
10 Hz – 5 kHz 0.15 + 0.06 0.15 + 0.06 0.15 + 0.06 0.015 + 0.006
10 A[2]
5 – 10 kHz 0.35 + 0.7 0.35 + 0.7 0.35 + 0.7 0.03 + 0.006
[1] Part of the 10 A range
[2] Available only at front panel connectors
[3] 400 m available in software version 1.0.700.18 or greater only. 400 mA continuously; 550 mA for 2 minutes on, 1
minute off; maximum crest factor 3:1 at 400mA; specification for current above 329 mA is typical.
Additional Low Frequency Errors
Error is stated as % of reading.
AC Filter
Frequency 3HZ (slow) 20HZ (medium) 200HZ (fast)
10 – 20 Hz 0 0.25 –
20 – 40 Hz 0 0.02 –
40 – 100 Hz 0 0.01 0.55
100 – 200 Hz 0 0 0.2
200 Hz – 1 kHz 0 0 0.02
> 1 kHz 0 0 0
Frequency
Gate Times.....................................................................Programmable to 1 s, 100 ms, and 10 ms
Measurement Method..................................................Flexible counting technique. AC-coupled input using the ac voltage measurement
function.
Settling Considerations..............................................When measuring frequency or period after a dc offs et voltage change, errors may occur.
For the most accurate measurement, wait up to 1 second for the input blocking capacitor
to settle.
Measurement Considerations....................................To minimize me asurement errors, shield inputs from external noise when measuring low-
voltage, low-frequency signals.
8846A Accuracy
Accuracy is given as ± % measurement
Range Frequency
24 Hour
(23 ±1 °C) 90 Days
(23 ±5 °C) 1 Year
(23 ±5 °C) Temperature
Coefficient/ °C
Outside 18 to 28 °C
3 – 5 Hz 0.1 0.1 0.1 0.005
5 – 10 Hz 0.05 0.05 0.05 0.005
10 – 40 Hz 0.03 0.03 0.03 0.001
40 Hz – 300 kHz 0.006 0.01 0.01 0.001
100 mV to
1000 V[1][2]
300 kHz – 1 MHz 0.006 0.01 0.01 0.001
[1] Input >100 mV. For 10 – 100 mV, multiply percent measurement error by 10.
[2] Limited to 8 X 107 volt-Hertz
10 Fluke Corporation 8845A and 8846A
8845A Accuracy
Accuracy is given as ± % measurement
Range Frequency
24 Hour
(23 ±1 °C) 90 Days
(23 ±5 °C) 1 Year
(23 ±5 °C) Temperature
Compensation/ °C
Outside 18 to 28 °C
3 – 5 Hz 0.1 0.1 0.1 0.005
5 – 10 Hz 0.05 0.05 0.05 0.005
10 – 40 Hz 0.03 0.03 0.03 0.001
100 mV to
750 V[1][2]
40 Hz – 300 kHz 0.006 0.01 0.01 0.001
[1] Input >100 mV. For 10 – 100 mV, multiply percent measurement error by 10.
[2] Limited to 8 X 107 volt-Hertz
Gate Time vs. Resolution
Gate Time Resolution
0.01 5½
0.1 6½
1.0 6½
Additional Low Frequency Errors
Error stated as percent of measurement for inputs >100 mV. For 10 – 100 mV, multiply percent by 10.
Resolution
Frequency 6½ 5½ 4½
3 – 5 Hz 0 0.12 0.12
5 – 10 Hz 0 0.17 0.17
10 – 40 Hz 0 0.2 0.2
40 – 100 Hz 0 0.06 0.21
100 – 300 Hz 0 0.03 0.21
300 Hz – 1 kHz 0 0.01 0.07
> 1 kHz 0 0 0.02
Capacitance (8846A Only)
Accuracy is stated as ±(% of measurement + % of range)
Range Resolution
1 Year Accuracy[1]
(23 ±5 °C) Temperature Co efficient / °C
Outside 18 to 28 °C
1 nF 1 pF 2% ± 2.5 % 0.05 + 0.05
10 nF 10 pF 1% ± 0.5 % 0.05 + 0.01
100 nF 100 pF 1% ± 0.5 % 0.01 + 0.01
1 µF 1 nF 1% ± 0.5 % 0.01 + 0.01
10 µF 10 nF 1% ± 0.5 % 0.01 + 0.01
100 µF 100 nF 1% ± 0.5 % 0.01 + 0.01
1 mF 1 µF 1% ± 0.5 % 0.01 + 0.01
10 mF 10 µF 1% ± 0.5 % 0.01 + 0.01
100 mF 100 µF 4% ± 0.2 % 0.05 + 0.05
[1] Stated accuracy is attained when Zero function is used.
Temperature (8846A only)
Test Current...................................................................1 mA
Accuracy is stated as ± °C and is based on a Platinum RT100 (DIN IEC 751, 385 type) RTD with less than 10 ohms lead resistance. The
accuracy listed in the table below are v alid only when using the 4-wire RTD measurement function. Specifications do not include probe
accuracy, which must be added.
Accuracy
Range Resolution
90 Days
(23 ±5 °C) 1 Year
(23 ±5 °C)
Temperature
Coefficient/ °C
Outside 18 to 28 °C
-200 °C 0.001 °C 0.06 0.09 0.0025
-100 °C 0.001 °C 0.05 0.08 0.002
0 °C 0.001 °C 0.04 0.06 0.002
100 °C 0.001 °C 0.05 0.08 0.002
300 °C 0.001 °C 0.1 0.12 0.002
600 °C 0.001 °C 0.18 0.22 0.002
Additional Errors
Digits NPLC Additional NPLC Noise Error
C° 0 001 ½ 6
C° 0 01 ½ 6
C° 30.0 1 ½ 5
C° 21.0 2.0 ½ 5
4 ½ 0.02 0.6 °C
Continuity
Continuity Threshold..................................................Selectable between 1 Ω and 1000 Ω
Test Current...................................................................1 mA
Response Time..............................................................300 samples/sec with audible tone
Accuracy is given as ± (% measurements + % 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
1000.0 Ω 0.002 + 0.01 0.008 + 0.02 0.01 + 0.02 0.001 + 0.002
Diode Test
Test Current...................................................................100μA or 1 mA
Response Time..............................................................300 samples/sec with audible tone.
Accuracy is given as ± (% measurements + % 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
5.0000 V 0.002 + 0.002 0.008 + 0.002 0.01 + 0.002 0.001 + 0.002
10.0000 V 0.002 + 0.001 0.008 + 0.002 0.01 + 0.002 0.001 + 0.002
Measurement Rates (IEEE488[4])
Measurements/Second[1]
Function Digits Setting Integration Time
60 Hz (50 Hz) 8845A 8846A
6½ 100 NPLC1.67 (2) s 0.6 (0.5) 0.6 (0.5)
6½ 10 NPLC 167 (200) ms 6 (5) 6 (5)
5½ 1 NPLC 16.7 (20) ms 60 (50) 60 (50)
5½ 0.2 NPLC 3.3 ms 270 270
DC Volts, DC Current, and
Resistance
4½ 0.02 NPLC 500 us 995 995
6½ 3 Hz 0.47 0.47
6½ 20 Hz 1.64 1.64
AC Voltage and AC Current[2]
6½ 200 Hz[3] 4.5 4.5
6½ 1 s 1 1
5½ 100 ms 9.8 9.8
Frequency and Period
4½ 10 ms 80 80
2 AN 2/1 6 ecnaticapaC
[1] Typical measurement rates with auto-zero off, delay = 0, display off, auto range off and math off.
[2] Maximum measurement rates for 0.01 % of ac step. When dc input varies, additional settling delay is required.
[3] For remote operation or external trigger using default settling delay
[4] Speeds available in OutG SW 1.0.700.18 or higher. Note that the measurements rates for RS232 can vary depending on the
baud rate chosen. If the baud rate selected is 115,200, the maximum measurement rate is 711 measurement/s. The LAN bus
has a maximum measurement rate of 963 measurement/s.
Fluke Corporation
PO Box 9090, Everett, WA 98206 U.S.A.
Fluke Europe B.V.
PO Box 1186, 5602 BD
Eindhoven, The Netherlands
Fluke. Keeping your world
up and running.®
For more information call:
In the U.S.A. (800) 443-5853 or
Fax (425) 446-5116
In Europe/M-East/Africa +31 (0) 40 2675 200 or
Fax +31 (0) 40 2675 222
In Canada (800)-36-FLUKE or
Fax (905) 890-6866
From other countries +1 (425) 446-5500 or
Fax +1 (425) 446-5116
Web access: http://www.fluke.com
©2006-2008 Fluke Corporation.
Specifications subject to change without notice.
Printed in U.S.A. 2/2008 2748044 D-EN-N Rev B
Pub_ID: 11152-eng Rev 02
