Fluke 8845A User Manual

Fluke 8845A/8846A

Digital Multimeters

Extended Specifications

The Fluke 8845A and 8846A 6.5 digit precision multime­ters 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.

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

•

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 expec­tations. 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 tempera­ture, 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, statis­tics 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 combi­nation of features and perfor­mance makes the 8845A and
8846A an unbeatable value for
a wide variety of applications,
including manufacturing test,
research and development, and
service.

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 Ibs.)

Shipping Weight ............................................................5.0 kg (11.0 lbs)

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 greater than 1 V/m from 250 to 450 MHz in the 100 μA range.

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.........................................................................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

8845A and 8846A Fluke Corporation 1

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 sourc e impedance, cable dielectric

Input Characteristics

Range

100 mV 100.0000 mV 10 µV 1 µV 100 nV 10 MΩ or >10 GΩ
1 V 1.000000 V 100 µV 10 µV 1 µV 10 MΩ or >10 GΩ
10 V 10.00000 V 1 mV 100 µV 10 µV 10 MΩ or >10 GΩ
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.

Full Scale

(6½ Digits)

4½ Digits 5½ Digits 6½ Digits

8846A Accuracy

Accuracy is given as ± (% measurement + % of range)

Range

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

24 Hour

(23 ± 1 °C)

(23 ± 5 °C)

8845A Accuracy

Accuracy is given as ± (% measurement + % of range)

Range

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

24 Hour

(23 ± 1 °C)

(23 ± 5 °C)

characteristics, and input signal changes.

Resolution

90 Days

90 Days

1 Year

(23 ± 5 °C)

1 Year

(23 ± 5 °C)

Temperature

Coefficient/ °C

Outside 18 to 28 °C

Temperature

Coefficient/ °C

Outside 18 to 28 °C

Input Impedance

[1]
[1]
[1]

2 Fluke Corporation 8845A and 8846A

Additional Errors

Digits NPLC Additional Noise Error

6½ 100 0 % of range
6½ 10 0 % of range
5½ 1 0.001 % of range
5½ .2 0.001 % of range + 20 μV
4½ 0.02 0.01 % of range + 20 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 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 10

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)

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

Range

Full Scale

(6½ Digits)

4½ Digits 5½ Digits 6½ Digits

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

Resolution

Input Impedance

1 MΩ ±2 % shunted
by <100 pf

8846A Accuracy

Accuracy is given as ± (% measurement + % of range)

Range Frequency

100 mV

3 – 5 Hz 1.0 + 0.03 1.0 + 0.04 1.0 + 0.04 0.1 + 0.004

24 Hour

(23 ± 1 °C)

90 Days

(23 ± 5 °C)

1 Year

(23 ± 5 °C)

Temperature

Coefficient/ °C

Outside 18 to 28 °C

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

1 V

50 – 100 kHz 0.55 + 0.08 0.6 + 0.08 0.6 + 0.08 0.06 + 0.008
100 – 300 kHz
3 – 5 Hz 1.0 + 0.02 1.0 + 0.03 1.0 + 0.03 0.1 + 0.003

[1]

4.0 + 0.50 4.0 + 0.50 4.0 + 0.50 0.20 + 0.02

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

10 V

50 – 100 kHz 0.55 + 0.08 0.6 + 0.08 0.6 + 0.08 0.06 + 0.008
100 – 300 kHz
3 – 5 Hz 1.0 + 0.02 1.0 + 0.03 1.0 + 0.03 0.1 + 0.003

[1]

4.0 + 0.50 4.0 + 0.50 4.0 + 0.50 0.2 + 0.02

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

100 V

50 – 100 kHz 0.55 + 0.08 0.6 + 0.08 0.6 + 0.08 0.06 + 0.008
100 – 300 kHz
3 – 5 Hz 1.0 + 0.02 1.0 + 0.03 1.0 + 0.03 0.1 + 0.003

[1]

4.0 + 0.50 4.0 + 0.50 4.0 + 0.50 0.2 + 0.02

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 –- 300 kHz

[1]

4.0 + 0.50 4.0 + 0.50 4.0 + 0.50 0.2 + 0.02

7

8845A and 8846A Fluke Corporation 3