Fluke 8846A User Manual
®
8845A/8846A
Digital Multimeter
Calibration Manual
January 2007
© 2007 Fluke Corporation, All rights reserved.
All product names are trademarks of their respective companies.
LIMITED WARRANTY AND LIMITATION OF LIABILITY
Each Fluke product is warranted to be free from defects in material and workmanship under normal use and
service. The warranty period is one year and begins on the date of shipment. Parts, product repairs, and
services are warranted for 90 days. This warranty extends only to the original buyer or end-user customer of
a Fluke authorized reseller, and does not apply to fuses, disposable batteries, or to any product which, in
Fluke's opinion, has been misused, altered, neglected, contaminated, or damaged by accident or abnormal
conditions of operation or handling. Fluke warrants that software will operate substantially in accordance
with its functional specifications for 90 days and that it has been properly recorded on non-defective media.
Fluke does not warrant that software will be error free or operate without interruption.
Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers
only but have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support is
available only if product is purchased through a Fluke authorized sales outlet or Buyer has paid the
applicable international price. Fluke reserves the right to invoice Buyer for importation costs of
repair/replacement parts when product purchased in one country is submitted for repair in another country.
Fluke's warranty obligation is limited, at Fluke's option, to refund of the purchase price, free of charge repair,
or replacement of a defective product which is returned to a Fluke authorized service center within the
warranty period.
To obtain warranty service, contact your nearest Fluke authorized service center to obtain return
authorization information, then send the product to that service center, with a description of the difficulty,
postage and insurance prepaid (FOB Destination). Fluke assumes no risk for damage in transit. Following
warranty repair, the product will be returned to Buyer, transportation prepaid (FOB Destination). If Fluke
determines that failure was caused by neglect, misuse, contamination, alteration, accident, or abnormal
condition of operation or handling, including overvoltage failures caused by use outside the product’s
specified rating, or normal wear and tear of mechanical components, Fluke will provide an estimate of repair
costs and obtain authorization before commencing the work. Following repair, the product will be returned to
the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges
(FOB Shipping Point).
THIS WARRANTY IS BUYER'S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE
FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR LOSSES,
INCLUDING LOSS OF DATA, ARISING FROM ANY CAUSE OR THEORY.
Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion or
limitation of incidental or consequential damages, the limitations and exclusions of this warranty may not
apply to every buyer. If any provision of this Warranty is held invalid or unenforceable by a court or other
decision-maker of competent jurisdiction, such holding will not affect the validity or enforceability of any other
provision.
Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.
Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands
11/99
To register your product online, visit register.fluke.com
Table of Contents
Chapter Title Page
1 Introduction and Specifications......................................................... 1-1
Introduction........................................................................................................ 1-3
Safety Information ............................................................................................. 1-3
Symbols ......................................................................................................... 1-4
General Safety Summary............................................................................... 1-4
Description of IEC 61010 Measurement Categories ......................................... 1-6
Organization of the Calibration Manual ............................................................ 1-7
Chapter 1 – Introduction and Specifications ................................................. 1-7
Chapter 2 – General Maintenance ................................................................. 1-7
Chapter 3 – Performance Test and Calibration.............................................. 1-7
Chapter 4 – List of Replaceable Parts ........................................................... 1-7
Operating Instructions........................................................................................ 1-7
Accessories ........................................................................................................ 1-7
General Specifications ....................................................................................... 1-9
Power............................................................................................................. 1-9
Dimensions.................................................................................................... 1-9
Display........................................................................................................... 1-9
Environment .................................................................................................. 1-9
Safety............................................................................................................. 1-9
EMC .............................................................................................................. 1-9
Triggering...................................................................................................... 1-9
Memory ......................................................................................................... 1-10
Math Functions.............................................................................................. 1-10
Electrical........................................................................................................ 1-10
Remote Interfaces.......................................................................................... 1-10
Warranty........................................................................................................ 1-10
Electrical Specifications .................................................................................... 1-10
DC Voltage Specifications ............................................................................ 1-10
Input Characteristics.................................................................................. 1-10
8846A Accuracy........................................................................................ 1-11
8845A Accuracy........................................................................................ 1-11
Additional Errors....................................................................................... 1-11
AC Voltage Specifications ............................................................................ 1-11
Input Characteristics.................................................................................. 1-12
8846A Accuracy........................................................................................ 1-12
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8845A/8846A
Calibration Manual
8845A Accuracy........................................................................................ 1-13
Additional Low Frequency Errors............................................................. 1-13
Resistance...................................................................................................... 1-14
Input Characteristics.................................................................................. 1-14
8846A Accuracy........................................................................................ 1-14
8845A Accuracy........................................................................................ 1-14
Additional Ohms Errors ............................................................................ 1-15
DC Current .................................................................................................... 1-15
Input Characteristics.................................................................................. 1-15
Accuracy (8846A)..................................................................................... 1-15
Accuracy (8845A)..................................................................................... 1-16
Additional Current Errors ......................................................................... 1-16
AC Current .................................................................................................... 1-16
Input Characteristics.................................................................................. 1-16
8846A Accuracy........................................................................................ 1-17
8845A Accuracy........................................................................................ 1-18
Additional Low Frequency Errors............................................................. 1-18
Frequency ...................................................................................................... 1-18
8846A Accuracy........................................................................................ 1-19
8845A Accuracy........................................................................................ 1-19
Gate Time vs. Resolution.......................................................................... 1-19
Additional Low Frequency Errors............................................................. 1-20
Capacitance (8846A Only) ............................................................................ 1-20
Temperature (8846A only) ............................................................................ 1-20
Continuity...................................................................................................... 1-20
Diode Test ..................................................................................................... 1-21
Measurement Rates ....................................................................................... 1-21
Measurement Uncertainty.................................................................................. 1-21
Interpreting Accuracy Specifications................................................................. 1-22
24-Hour Accuracy ......................................................................................... 1-22
90-Day and 1-Year Accuracy ........................................................................ 1-22
Temperature Coefficients .............................................................................. 1-22
Configuring for Highest Accuracy Measurements ............................................ 1-22
DC Voltage, DC Current, and Resistance Measurements ............................. 1-22
AC Voltage and AC Current Measurements: ................................................ 1-22
Frequency and Period Measurements:........................................................... 1-22
2 General Maintenance .......................................................................... 2-1
Introduction........................................................................................................ 2-3
Warranty Repairs and Shipping Information..................................................... 2-3
General Maintenance Information ..................................................................... 2-3
Required Equipment...................................................................................... 2-3
Power Requirements...................................................................................... 2-3
Static Safe Handling ...................................................................................... 2-3
Cleaning............................................................................................................. 2-4
Fuse Replacement .............................................................................................. 2-4
Line-Power Fuse............................................................................................ 2-4
Current-Input Fuses ....................................................................................... 2-5
If the Meter Does Not Turn On.......................................................................... 2-7
Display Tests...................................................................................................... 2-7
Disassembly Procedures .................................................................................... 2-7
General Disassembly ..................................................................................... 2-7
Main Chassis Disassembly ............................................................................ 2-8
Front Panel Disassembly ............................................................................... 2-8
ii
Contents (continued)
Assembly Procedures......................................................................................... 2-8
3 Performance Test and Calibration..................................................... 3-1
Introduction........................................................................................................ 3-3
Required Equipment .......................................................................................... 3-3
Test Considerations............................................................................................ 3-5
Performance Tests.............................................................................................. 3-5
Volts DC Verification.................................................................................... 3-5
Volts AC and Frequency Verification ........................................................... 3-8
4-Wire Ohms Verification............................................................................. 3-12
2-Wire Ohms Verification............................................................................. 3-14
2X4 Test Lead Verification Steps ................................................................. 3-16
Rear Panel Terminal Verification Steps ........................................................ 3-16
Capacitance Verification Steps (8846A only) ............................................... 3-18
DC Current Verification Steps ...................................................................... 3-19
AC Current Verification Steps ...................................................................... 3-22
Adjustment (Calibration) ................................................................................... 3-24
Unlocking the Meter for Front-Panel Adjustments (Calibration).................. 3-24
Unlocking the Meter for Adjustments Over a Remote Interface................... 3-25
Changing the Calibration Password .............................................................. 3-25
Resetting the Calibration Password............................................................... 3-25
Equipment for Calibration............................................................................. 3-26
Adjustment Process ....................................................................................... 3-26
Aborting a Calibration Process...................................................................... 3-32
Sample Adjustment Program......................................................................... 3-32
4 List of Replaceable Parts.................................................................... 4-1
Introduction........................................................................................................ 4-3
How to Obtain Parts........................................................................................... 4-3
How to Contact Fluke ........................................................................................ 4-3
Parts ................................................................................................................... 4-4
Appendices
A Verification Forms ...................................................................................... A-1
B Example Adjustment Program .................................................................... B-1
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8845A/8846A
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iv
List of Tables
Table Title Page
1-1. Safety and Electrical Symbols................................................................................ 1-4
1-2. Safety Information ................................................................................................. 1-5
1-3. Accessories............................................................................................................. 1-7
2-1. Line Voltage to Fuse Rating................................................................................... 2-5
3-1. Required Test Equipment....................................................................................... 3-3
3-2. 8846A DC Volts Verification Steps....................................................................... 3-6
3-3. 8845A DC Volts Verification Steps....................................................................... 3-7
3-4. 8846A AC Volts Verification Steps....................................................................... 3-9
3-5. 8845A AC Volts Verification Steps....................................................................... 3-10
3-6. 8845A/8846A AC Volts Frequency Verification Steps ......................................... 3-11
3-7. 8846A 4-Wire Ohms Verification Steps ................................................................ 3-13
3-8. 8845A 4-Wire Ohms Verification Steps ................................................................ 3-13
3-9. 8846A 2-Wire Ohms Verification Steps ................................................................ 3-15
3-10. 8845A 2-Wire Ohms Verification Steps ................................................................ 3-15
3-11. 8846A Rear-Panel Terminal Verification Steps (Optional Test) ........................... 3-18
3-12. 8845A Rear-Panel Terminal Verification Steps (Optional Test) ........................... 3-18
3-13. 8846A Capacitance Verification Steps .................................................................. 3-18
3-14. 8846A DC Current Verification Steps ................................................................... 3-19
3-15. 8845A DC Current Verifications Steps.................................................................. 3-20
3-17. 8845A AC Current Verification Steps ................................................................... 3-23
3-18. 8845A/8846A Adjustment Steps............................................................................ 3-27
4-1. Replaceable Parts ................................................................................................... 4-4
A-1. Blank Verification Record for 90-Day Specifications ........................................... A-2
A-2. Blank Verification Record for 1-Year Specifications............................................ A-9
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8845A/8846A
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vi
List of Figures
Figure Title Page
1-1. IEC 61010 Measurement Category (CAT) Levels................................................. 1-6
2-1. Line Fuse Replacement .......................................................................................... 2-5
2-2. Current Input Fuse Replacement............................................................................ 2-6
3-1. DC Volts Test Equipment Setup with 5520A ........................................................ 3-6
3-2. AC Volts Test Equipment Setup with 5520A ........................................................ 3-8
3-3. 4-Wire Ohms Test Equipment Setup ..................................................................... 3-12
3-4. 2-Wire Ohms Test Equipment Setup ..................................................................... 3-14
3-5. Rear-Panel Terminals Equipment Setup ................................................................ 3-17
3-6. Capacitance Equipment Setup................................................................................ 3-18
3-7. DC Current Equipment Setup ................................................................................ 3-19
3-8. AC Current Equipment Setup ................................................................................ 3-22
3-9. Calibration Jumper Location.................................................................................. 3-26
4-1. Final Assembly....................................................................................................... 4-7
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8845A/8846A
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viii
Chapter 1
Introduction and Specifications
Title Page
Introduction........................................................................................................ 1-3
Safety Information ............................................................................................. 1-3
Symbols ......................................................................................................... 1-4
General Safety Summary............................................................................... 1-4
Description of IEC 61010 Measurement Categories ......................................... 1-6
Organization of the Calibration Manual ............................................................ 1-7
Chapter 1 – Introduction and Specifications ................................................. 1-7
Chapter 2 – General Maintenance ................................................................. 1-7
Chapter 3 – Performance Test and Calibration.............................................. 1-7
Chapter 4 – List of Replaceable Parts ........................................................... 1-7
Operating Instructions........................................................................................ 1-7
Accessories ........................................................................................................ 1-7
General Specifications ....................................................................................... 1-9
Power............................................................................................................. 1-9
Dimensions.................................................................................................... 1-9
Display........................................................................................................... 1-9
Environment .................................................................................................. 1-9
Safety............................................................................................................. 1-9
EMC .............................................................................................................. 1-9
Triggering...................................................................................................... 1-9
Memory ......................................................................................................... 1-10
Math Functions.............................................................................................. 1-10
Electrical........................................................................................................ 1-10
Remote Interfaces.......................................................................................... 1-10
Warranty........................................................................................................ 1-10
Electrical Specifications .................................................................................... 1-10
DC Voltage Specifications ............................................................................ 1-10
AC Voltage Specifications ............................................................................ 1-11
Resistance...................................................................................................... 1-14
DC Current .................................................................................................... 1-15
AC Current .................................................................................................... 1-16
Frequency ...................................................................................................... 1-18
Capacitance (8846A Only) ............................................................................ 1-20
Temperature (8846A only) ............................................................................ 1-20
Continuity...................................................................................................... 1-20
1-1
8845A/8846A
Calibration Manual
Diode Test ..................................................................................................... 1-21
Measurement Rates ....................................................................................... 1-21
Measurement Uncertainty.................................................................................. 1-21
Interpreting Accuracy Specifications................................................................. 1-22
24-Hour Accuracy ......................................................................................... 1-22
90-Day and 1-Year Accuracy ........................................................................ 1-22
Temperature Coefficients .............................................................................. 1-22
Configuring for Highest Accuracy Measurements ............................................ 1-22
DC Voltage, DC Current, and Resistance Measurements ............................. 1-22
AC Voltage and AC Current Measurements: ................................................ 1-22
Frequency and Period Measurements:........................................................... 1-22
1-2
Introduction and Specifications
Introduction 1
Introduction
The 8845A and 8846A are 6-1/2 digit, dual-display multimeters designed for bench-top,
field service, and system applications. Their full complement of measurement functions
plus its RS-232, IEEE 488, and Ethernet Remote Interfaces makes these multimeters
ideal candidates for precision manual measurements and use in automated systems. For
portability, these multimeters include a carrying handle that also serves as a bail for
bench top operation.
There are a few additional features in the 8846A that are not present in the 8845A. These
features will be identified with the annotation of “8846A Only” by each feature that is
found only in that model. Separate specification tables are also used to clarify the
differences between these two models.
The following is a list of some of the features and functions:
• Bright, large-digit, wide-viewing-angle display
• Dual display for displaying two properties of an input signal (e.g., ac voltage in one
display and frequency in the other).
• Remote operation via IEEE 488, RS-232, and Ethernet interface.
• Trigger in and measurement-complete out
• Front panel USB port for optional memory (8846A Only)
• 6-1/2 digit resolution
• Half-rack width
• True rms ac
• 2 and 4-wire resistance measurements
• Extended 10 Ω and 1 GΩ ranges (8846A Only)
• Frequency measurements to 300 kHz (8846A to 1 MHz)
• Capacitance measurements (8846A Only)
• Temperature measurement (8846A Only)
• 10 A current capability
• Decibels (dB and dBm) with variable reference impedance and audio power
measurement capability
• Input terminals on both front and rear panels of the meter
• Closed-case calibration (no internal calibration adjustments)
This calibration manual focuses on performance verification and calibration of the Fluke
8845A and 8846A Digital Multimeters (hereafter referred to as the Meter).
Safety Information
This section addresses safety considerations and describes symbols that may appear on
the Meter or in the manual.
A Warning statement identifies conditions or practices that could result in injury or
death.
A Caution statement identifies conditions or practices that could result in damage to the
Meter or equipment to which it is connected.
1-3
8845A/8846A
Calibration Manual
Symbols
Symbol Description Symbol Description
XW Warning
To avoid electric shock, personal injury, or death, carefully read
the information under “Safety Information” before attempting to
install, use, or service the Meter.
Table 1-1 is a list of safety and electrical symbols that appear on the Meter or in this
manual.
Table 1-1. Safety and Electrical Symbols
W
X
B
F
D
or
C
R
Y
T
h
Risk of danger. Important
information. See manual
Hazardous voltage. Voltage > 30 V
dc or ac peak might be present
AC (Alternating Current)
DC (Direct Current)
AC or DC (Alternating or Direct
Current)
Continuity test or continuity beeper
tone
Potentially hazardous voltage
Double insulated
Static awareness. Static discharge
can damage part(s)
O
J
E
G
I
Y
U
CAT II
<
~
Display ON / OFF
Earth ground
Capacitance
Diode
Fuse
Digital signal
Maintenance or Service
IEC 61010 Overvoltage (installation or
measurement) Category 2.
Recycle
Do not dispose of this product as unsorted
municipal waste. Contact Fluke or a qualified
recycler for disposal
1-4
General Safety Summary
This instrument has been designed and tested in accordance with the European standard
publication EN 61010-1:2001 and U.S. / Canadian standard publications UL 61010-1A1
and CAN/CSA-C22.2 No.61010.1. The Meter has been supplied in a safe condition.
This manual contains information and warnings that must be observed to keep the
instrument in a safe condition and ensure safe operation.
To use the Meter correctly and safely, read and follow the precautions in Table 1-2, and
follow all the safety instructions or warnings given throughout this manual that relate to
specific measurement functions. In addition, follow all generally accepted safety
practices and procedures required when working with and around electricity.
Introduction and Specifications
Table 1-2. Safety Information
Safety Information 1
XW Warning
To avoid possible electric shock, personal injury, or death, read the following before using
the Meter:
• Use the Meter only as specified in this manual, or the protection provided by the Meter
might be impaired.
• Do not use the Meter in wet environments.
• Inspect the Meter before using it. Do not use the Meter if it appears damaged.
• Inspect the test leads before use. Do not use them if insulation is damaged or metal is
exposed. Check the test leads for continuity. Replace damaged test leads before using
the Meter.
• Verify the Meter's operation by measuring a known voltage before and after using it. Do
not use the Meter if it operates abnormally. Protection may be impaired. If in doubt, have
the Meter serviced.
• Whenever it is likely that safety protection has been impaired, make the Meter inoperative
and secure it against any unintended operation.
• Servicing of the Meter should be performed by qualified service personnel.
• Do not apply more than the rated voltage, as marked on the Meter, between the terminals
or between any terminal and earth ground.
• While in IEC Measurement Category II environments, do not apply voltages above 600 V
ac to the input of the Meter. See “Description of IEC 61010 Measurement Categories”
later in this chapter.
• Always use the power cord and connector appropriate for the voltage and outlet of the
country or location in which you are working.
• Always use a power cord with a ground connection and ensure the ground is properly
connected to the power distribution system.
• Remove test leads from the Meter before opening the case.
• Never remove the cover or open the case of the Meter without first removing it from the
main power source.
• Use caution when working with voltages above 30 V ac rms, 42 V ac peak, or 42 V dc.
These voltages pose a shock hazard.
• Use only the replacement fuse(s) specified by the manual.
• Use the proper terminals, function, and range for your measurements.
• Do not operate the Meter around explosive gas, vapor, or dust.
• When using probes, keep your fingers behind the finger guards.
• When making electrical connections, connect the common test lead before connecting
the live test lead; when disconnecting, disconnect the live test lead before disconnecting
the common test lead.
• Disconnect circuit power and discharge all high-voltage capacitors before testing
resistance, continuity, diodes, or capacitance.
• Before measuring current, check the Meter's fuses and turn OFF power to the circuit
before connecting the Meter to the circuit.
• When servicing the Meter, use only specified replacement parts.
1-5
8845A/8846A
Calibration Manual
Description of IEC 61010 Measurement Categories
WCaution
To prevent damage to the Meter, do not change the position of
the Front/Rear switch while signals are applied to either the
front or rear input terminals.
The IEC 61010 safety standard defines four Overvoltage (Installation) Categories (CAT I
to CAT IV) based on the magnitude of danger from transient impulses as shown in
Figure 1-1.
CAT I
Electronic
CAT II
Appliances,
PCs, TVs
Figure 1-1. IEC 61010 Measurement Category (CAT) Levels
CAT III
MC Panels, etc.
Service
Entrance
Service
Entrance
Service
Entrance
CAT IV
Meter
Meter
Underground Service
Transformer
Underground Service
Outbuilding
Outbuilding
Meter
cat_levels.eps
1-6
The IEC 61010 Measurement CAT level indicates the level of protection the instrument
provides against impulse withstand voltage.
CAT I equipment is designed to protect against transients from high-voltage, low-energy
sources, such as electronic circuits or a copy machine.
CAT II equipment is designed to protect against transients from energy-consuming
equipment supplied from the fixed installation, such as TVs, PCs, portable tools, and
other household appliances.
CAT III equipment is designed to protect against transients in equipment in fixed
equipment installations, such as distribution panels, feeders and short branch circuits, and
lighting systems in large buildings.
CAT IV equipment is designed to protect against transients from the primary supply
level, such as an electricity meter or an overhead or underground utility service.
Introduction and Specifications
Organization of the Calibration Manual 1
Organization of the Calibration Manual
This calibration manual is divided into the following chapters:
Chapter 1 – Introduction and Specifications
This chapter introduces the Fluke 8845A and 8846A Digital Multimeters, describing their
features, and accessories. This chapter also discusses use of the Calibration Manual and
the various conventions used in describing the meter’s circuitry and presents a complete
set of specifications.
Chapter 2 – General Maintenance
Chapter 2 provides maintenance information covering handling, cleaning, and fuse
replacement. Access and reassembly procedures are also explained in this chapter.
Chapter 3 – Performance Test and Calibration
This chapter provides performance verification procedures related to the specifications
presented in Chapter 1. To maintain these specifications, a full adjustment/calibration
procedure is also presented.
Chapter 4 – List of Replaceable Parts
Chapter 4 includes parts lists for all standard assemblies and information on how and
where to order parts.
Operating Instructions
Full operating instructions are provided in the Fluke 8845A/8846A Users Manual.
Reference to these instructions may be necessary during some of the maintenance and
repair procedures presented in this Calibration Manual.
Accessories
Table 1-3 lists the available accessories for the 8845A and 8846A.
Table 1-3. Accessories
Model/Fluke PN Description
TL71 Test Lead Set, Premium DMM
TL910 Precision Electronic Probe Set
TL80A Basic Electronic DMM Test Set
8845A-TPIT Test Probe Ic Tip (Set Red & Black)
8845A-EFPT Extended Fine Pt Tip Adap Set (Set Red/Black)
884X-SHORT 4-Wire short
TL2X4W-PTII 2x4 Wire Ohms 1000V Test lead
884X-RTD 100 Ohm RTD Temperature Probe
884X-512M USB Memory 512M
1-7
8845A/8846A
Calibration Manual
Model/Fluke PN Description
884X-1G USB Memory 1 GB
884X-USB USB to RS232 cable adapter
884X-ETH Ethernet Interface Cable
RS43 RS232 Cable (RS43, 2m)
Y8021 IEEE488 cable (1m)
Y8022 IEEE488 cable (2m)
884X-CASE Black Case
FVF-UG FlukeView Forms Software Upgrade - NO cable
FVF-SC4 Flukeview Forms W/Cable For 8845/8846
FVF-SC5 Flukeview Forms -Basic For 8845/8846
Y8846S Rack Mount Kit 8845A & 8846A Single
Table 1-3. Accessories (cont)
Y8846D Rack Mount Kit 8845A & 8846A Dual
FUSE Fuse,11A,1000V,Fast.406inx1.5in,Bulk
FUSE Fuse,.440 mA,1000V,Fast,.406X1.375,Bulk
2132558 Calibration, Traceable, w/ Data
1259800 Calibration, Traceable, w/o Data
1256480 Calibration, Z540 Traceable, w/ Data
1258910 Calibration, Z540 Traceable, w/o Data
1256990 Calibration, Accredited
1024830 Agreement, Extended Warranty
2426684 Agreement, Calibration, Traceable, w/ Data
1028820 Agreement, Calibration, Traceable, w/o Data
1259170 Agreement, Calibration, Z540 Traceable, w/ Data
1258730 Agreement, Calibration, Z540 Traceable, w/o Data
1259340 Agreement, Calibration, Accredited
2441827 Agreement, Calibration, Primary Standards Lab
1540600 Agreement, Calibration, Artifact
1-8
Introduction and Specifications
General Specifications 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 lbs)
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 %
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)
28 °C to 40 °C <80 %
40 °C to 55 °C <50 %
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.
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)
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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
memory module (available separately, see “Accessories”) through
front-panel USB port
750 V ac (8845A), Diode, and 10 A ranges
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
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 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] Inputs beyond ±14 V are clamped through 200 kΩ typical. 10 MΩ is default input impedance.
4½ Digits 5½ Digits 6½ Digits
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
Input Impedance
10 MΩ or >10 GΩ
10 MΩ or >10 GΩ
10 MΩ or >10 GΩ
10 MΩ ±1%
10 MΩ ±1%
[1]
[1]
[1]
1-10
Introduction and Specifications
Electrical Specifications 1
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)
90 Days
(23 ±5 °C)
1 Year
(23 ±5 °C)
Temperature
Coefficient/ °C
Outside 18 to 28 °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)
90 Days
(23 ±5 °C)
1 Year
(23 ±5 °C)
Temperature
Coefficient/ °C
Outside 18 to 28 °C
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
4½ 0.02
0.001 % of range +20 μV
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
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
7
volts-Hertz product (whichever is less) for any
1-11
8845A/8846A
Calibration Manual
Input Characteristics
Range Resolution
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
8846A Accuracy
Accuracy is given as ± (% measurement + % of range)
Range Frequency
100 mV
1 V
10 V
100 V
1000 V
[1] Typically 30 % reading error at 1 MHz
[2] 1000 Volt range is limited to 8 X 10
Resolution
4½ Digits 5½ Digits 6½ Digits
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 – 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
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 – 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 –- 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
100 – 300 kHz
[2]
0.55 + 0.08 0.6 + 0.08 0.6 + 0.08 0.06 + 0.008
[1][2]
4.0 + 0.5 4.0 + 0.50 4.0 + 0.50 0.2 + 0.02
7
volt-Hertz
Input Impedance
1 MΩ ±2 % shunted
by <100 pf
1-12
Introduction and Specifications
Electrical Specifications 1
8845A Accuracy
Accuracy is given as ± (% measurement + % of range)
Range
100 mV
Frequency
(Hz)
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
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 0.2 + 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
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
50 – 100 kHz 0.55 + 0.08 0.6 + 0.08 0.6 + 0.08 0.06 + 0.008
[1]
4.0 + 0.50 4.0 + 0.50 4.0 + 0.50 0.2 + 0.02
100 V
100 – 300 kHz
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]
4.0 + 0.50 4.0 + 0.50 4.0 + 0.50 0.2 + 0.02
750 V
100 – 300 kHz
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
100 – 300 kHz
[1] Typically 30 % reading error at 1 MHz
[2] 750 Volt range is limited to 8 X 10
[2]
0.55 + 0.08 0.6 + 0.08 0.6 + 0.08 0.06 + 0.008
[1] [2]
4.0 + 0.5 4.0 + 0.5 4.0 + 0.5 0.2 + 0.02
24 Hour
(23 ±1 °C)
7
volt-Hertz
90 Days
(23 ±5 °C)
1 Year
(23 ±5 °C)
Temperature
Coefficient/ °C
Outside 18 to 28 °C
Additional Low Frequency Errors
Error is stated as % of reading.
Frequency
3HZ (slow) 20HZ (medium) 200HZ (fast)
AC Filter
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
1-13
8845A/8846A
Calibration Manual
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 resistance, 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 per lead for 100 Ω, 1 kΩ ranges. 1 kΩ per lead on all
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 dc filter off and power line
Input Characteristics
Range Resolution
10 Ω
100 Ω 100.0000 Ω 10 mΩ 1 mΩ 100 μΩ
1 kΩ 1.000000 kΩ 100 mΩ 10 mΩ 1 mΩ
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] 8846A Only
other ranges
frequency ±0.1 %
100 dB for NPLC of 1 or greater with dc filter on and power line
frequency ±0.1 %
Resolution
[1]
10.00000 Ω 1 mΩ 100 μΩ 10 μΩ
[1]
1.000000 GΩ 100 kΩ 10 kΩ 1 kΩ 1 μA || 10 MΩ/10 V
4½ Digits 5½ Digits 6½ Digits
Source Current
5 mA/13 V
1 mA/6 V
1 mA/6 V
8846A Accuracy
Accuracy is given as ± (% measurement + % of range)
Range
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
24 Hour
(23 ±1 °C)
90 Days
(23 ±5 °C)
1 Year
(23 ±5 °C)
Temperature
Coefficient/ °C
Outside 18 to 28 °C
8845A Accuracy
Accuracy is given as ± (% measurement + % of range)
Range
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
24 Hour
(23 ±1 °C)
90 Days
(23 ±5 °C)
1 Year
(23 ±5 °C)
Temperature
Coefficient/ °C
Outside 18 to 28 °C
1-14
Introduction and Specifications
Electrical Specifications 1
Additional Ohms Errors
Digits NPLC Additional Noise Error
6½ 100 0 % of range
6½ 10 0 % of range
5½ 1 0.001 % of range
5½ 0.2
4½ 0.02
0.001 % of range ±20 mΩ
0.01 % of range ±20 mΩ
DC Current
Input Protection .................................................... Tool-accessible 11 A/1000 V and 440 mA/1000 V fuses
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 %
Input Characteristics
Range Resolution
100 µA 100.0000 µA 10 nA 1 nA 100 pA
1 mA 1.000000 mA 100 nA 10 nA 1 nA
10 mA 10.00000 mA
100 mA 100.0000 mA 10 µA
1 A 1.000000 A 100 µA 10 µA
[1]
3 A
10 A 10.00000 A 1 mA 100 µA 10 µA
[1] Part of 10 A range.
3.00000A 1 mA 100 µA 10 µA
4½ Digits 5½ Digits 6½ Digits
1 μA
Resolution
100 nA 10 nA
1 μA
100 nA
1 μA
Shunt Resistance
(Ohms)
100 Ω
100 Ω
1 Ω
1 Ω
0.01 Ω
0.01 Ω
0.01 Ω
Burden Voltage
<0.015 V
<0.15 V
<0.025 V
<0.25 V
<0.05 V
<0.15 V
<0.5 V
Accuracy (8846A)
Accuracy is given as ± (% measurement + % of range)
Range
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
100 mA 0.01 + 0.004 0.03 + 0.005 0.05 + 0.005 0.002 + 0.0005
[2]
1 A
[1][2]
3 A
[2]
10 A
[1] Part of 10 A range
[2] Available at front panel connectors only
24 Hour
(23 ±1 °C)
0.007 + 0.02 0.03 + 0.02 0.05 + 0.02 0.002 + 0.002
0.03 + 0.02 0.04 + 0.02 0.05 + 0.02 0.005 + 0.001
0.05 + 0.02 0.08 + 0.02 0.1 + 0.02 0.005 + 0.002
0.1 + 0.008 0.12 + 0.008 0.15 + 0.008 0.005 + 0.0008
90 Days
(23 ±5 °C)
1 Year
(23 ±5 °C)
Temperature
Coefficient/ °C
Outside 18 to 28 °C
1-15
8845A/8846A
Calibration Manual
Accuracy (8845A)
Accuracy is given as ± (% measurement + % of range)
Range
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
100 mA 0.01 + 0.004 0.03 + 0.005 0.05 + 0.005 0.002 + 0.0005
[2]
1 A
[1][2]
3 A
10 A
[1] Part of 10 A range
[2] Available at front panel connectors only
Additional Current Errors
6½ 100 0 % of range
6½ 10 0 % of range
5½ 1 0.001 % of range
5½ 0.2
4½ 0.02
24 Hour
(23 ±1 °C)
90 Days
(23 ±5 °C)
1 Year
(23 ±5 °C)
0.007 + 0.02 0.03 + 0.02 0.05 + 0.02 0.002 + 0.002
0.03 + 0.04 0.08 + 0.02 0.05 + 0.02 0.005 + 0.001
[2]
0.05 + 0.08 0.12 + 0.02 0.1 + 0.02 0.005 + 0.002
0.1 + 0.008 0.12 + 0.008 0.15 + 0.02 0.005 + 0.0008
Digits NPLC Additional Noise Error
0.001 % of range ±4 μA
0.01 % of range ±4 μA
Temperature
Coefficient/ °C
Outside 18 to 28 °C
AC Current
The following ac current specifications are for sinusoidal signals with 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 11 A/1000 V and 440 mA/1000 V fuses.
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
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 Resolution
[1]
100 μA
1 mA
100.0000 μA
[1]
1.000000 mA 100 nA 10 nA 1 nA
10 mA 10.00000 mA
4½ Digits 5½ Digits 6½ Digits
10 nA 1 nA 100 pA
1 μA
100 mA 100.0000 mA 10 µA
1 A 1.000000 A 100 µA 10 µA
3 A[2] 3.00000 A 1 mA 100 µA
Resolution
100 nA 10 nA
1 μA
100 nA
1 μA
10 μA
10 A 10.00000 A 1 mA 100 µA 10 µA
[1] 8846A Only
[2] Part of 10 A range
Shunt Resistance
(Ohms)
100 Ω
100 Ω
1 Ω
1 Ω
0.01 Ω
0.01 Ω
0.01 Ω
Burden Voltage
<0.015 V
<0.15 V
<0.025 V
<0.25 V
<0.05 V
<0.05 V
<0.5 V
1-16
Introduction and Specifications
Electrical Specifications 1
8846A Accuracy
Accuracy is given as ± (% measurement + % of range)
Range
100 μA
1 mA
10 mA
100 mA
[2]
1 A
[1][2]
3 A
[2]
10 A
[1] Part of 10 A range
[2] Available only on front panel connectors
Frequency
(Hz)
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
5 – 10 kHz 0.2 + 0.25 0.2 + 0.25 0.2 + 0.25 0.03 + 0.006
3 – 5 Hz 1.0 + 0.04 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
5 – 10 kHz 0.2 + 0.25 0.2 + 0.25 0.2 + 0.25 0.03 + 0.006
3 – 5 Hz 1.0 + 0.04 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
5 – 10 kHz 0.2 + 0.25 0.2 + 0.25 0.2 + 0.25 0.03 + 0.006
3 – 5 Hz 1.0 + 0.04 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
5 – 10 kHz 0.2 + 0.25 0.2 + 0.25 0.2 + 0.25 0.03 + 0.006
3 – 5 Hz 1.0 + 0.04 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
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
5 – 10 kHz 0.35 + 0.7 0.35 + 0.7 0.35 + 0.7 0.03 + 0.006
3 – 5 Hz 2.0 + 0.06 2.0 + 0.06 2.0 + 0.06 0.2 + 0.006
5 – 10 Hz 1.1 + 0.06 1.1 + 0.06 1.1 + 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
5 – 10 kHz 0.35 + 0.7 0.35 + 0.7 0.35 + 0.7 0.03 + 0.006
24 Hour
(23 ±1 °C)
90 Days
(23 ±5 °C)
1 Year
(23 ±5 °C)
Temperature
Coefficient/ °C
Outside 18 to 28 °C
1-17
8845A/8846A
Calibration Manual
8845A Accuracy
Accuracy is given as ± (% measurement + % of range)
Range
10 mA
100 mA
[2]
1 A
[1][2]
3 A
10 A
[1] Part of the 10 A range
[2] Available only at front panel connectors
Frequency
(Hz)
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
5 – 10 kHz 0.2 + 0.25 0.2 + 0.25 0.2 + 0.25 0.03 + 0.006
3 – 5 Hz 1.0 + 0.04 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
5 – 10 kHz 0.2 + 0.25 0.2 + 0.25 0.2 + 0.25 0.03 + 0.006
[2]
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
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
5 – 10 kHz 0.35 + 0.7 0.35 + 0.7 0.35 + 0.7 0.03 + 0.006
3 – 5 Hz 1.1 + 0.04 1.1 + 0.04 1.1 + 0.04 0.2 + 0.006
5 – 10 Hz 0.35 + 0.04 0.35 + 0.04 0.35 + 0.04 0.1 + 0.006
10 Hz – 5 kHz 0.15 + 0.04 0.15 + 0.04 0.15 + 0.04 0.015 + 0.006
5 – 10 kHz 0.35 + 0.7 0.35 + 0.7 0.35 + 0.7 0.03 + 0.006
24 Hour
(23 ±1 °C)
90 Days
(23 ±5 °C)
1 Year
(23 ±5 °C)
Temperature
Coefficient/ °C
Outside 18 to 28 °C
Additional Low Frequency Errors
Error is stated as % of reading.
Frequency
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
3HZ (slow) 20HZ (medium) 200HZ (fast)
AC Filter
Frequency
Gate Times............................................................. Programmable to 1 s, 100 ms, and 10 ms
Measurement Method ........................................... Flexible counting technique. AC-coupled input using the ac voltage
Settling Considerations........................................ When measuring frequency or period after a dc offset voltage change,
Measurement Considerations.............................. To minimize measurement errors, shield inputs from external noise
measurement function.
errors may occur. For the most accurate measurement, wait up to 1
second for the input blocking capacitor to settle.
when measuring low-voltage, low-frequency signals.
1-18
Introduction and Specifications
Electrical Specifications 1
8846A Accuracy
Accuracy is given as ± % measurement
Range Frequency
100 mV to
1000 V
[1] Input >100 mV. For 10 – 100 mV, multiply percent measurement error by 10.
[2] Limited to 8 X 10
3 – 5 Hz 0.1 0.1 0.1 0.005
[1][2]
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
300 kHz – 1 MHz 0.006 0.01 0.01 0.001
7
volt-Hertz
24 Hour
(23 ±1 °C)
90 Days
(23 ±5 °C)
1 Year
(23 ±5 °C)
Temperature
Coefficient/ °C
Outside 18 to 28 °C
8845A Accuracy
Accuracy is given as ± % measurement
Range Frequency
100 mV to
750 V
[1] Input >100 mV. For 10 – 100 mV, multiply percent measurement error by 10.
[2] Limited to 8 X 10
3 – 5 Hz 0.1 0.1 0.1 0.005
[1][2]
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
7
volt-Hertz
24 Hour
(23 ±1 °C)
90 Days
(23 ±5 °C)
1 Year
(23 ±5 °C)
Temperature
Compensation/ °C
Outside 18 to 28 °C
Gate Time vs. Resolution
Gate Time Resolution
0.01 5½
0.1 6½
1.0 6½
1-19
8845A/8846A
Calibration Manual
Additional Low Frequency Errors
Error stated as percent of measurement for inputs >100 mV. For 10 – 100 mV, multiply percent by 10.
3 – 5 Hz
5 – 10 Hz
10 – 40 Hz
40 – 100 Hz
100 – 300 Hz
300 Hz – 1 kHz
> 1 kHz
Capacitance (8846A Only)
Accuracy is stated as ±(% of measurement + % of range)
1 nF 1 pF
10 nF 10 pF
100 nF 100 pF
1 µF 1 nF
10 µF 10 nF
100 µF 100 nF
1 mF 1 µF
10 mF 10 µF
100 mF 100 µF
[1] Stated accuracy is attained when Zero function is used.
Frequency
0 0.12 0.12
0 0.17 0.17
0 0.2 0.2
0 0.06 0.21
0 0.03 0.21
0 0.01 0.07
0 0 0.02
Range Resolution
6½ 5½ 4½
1 Year Accuracy
2% ± 2.5 %
1% ± 0.5 %
1% ± 0.5 %
1% ± 0.5 %
1% ± 0.5 %
1% ± 0.5 %
1% ± 0.5 %
1% ± 0.5 %
4% ± 0.2 %
Resolution
(23 ±5 °C)
[1]
Temperature Coefficient/ °C
Outside 18 to 28 °C
0.05 + 0.05
0.05 + 0.01
0.01 + 0.01
0.01 + 0.01
0.01 + 0.01
0.01 + 0.01
0.01 + 0.01
0.01 + 0.01
0.05 + 0.05
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 valid only when using the 4-wire RTD measurement function.
Specifications do not include probe accuracy, which must be added.
Accuracy
Range Resolution
-200 °C 0.001 °C
-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 0.12 0.14 0.002
90 Days
(23 ±5 °C)
0.06
1 Year
(23 ±5 °C)
0.09 0.0025
Temperature
Coefficient/ °C
Outside 18 to 28 °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
1000.0 Ω 0.002 + 0.01 0.008 + 0.02 0.01 + 0.02
24 Hour
(23 ±1 °C)
90 Days
(23 ±5 °C)
1 Year
(23 ±5 °C)
Temperature
Coefficient/ °C
Outside 18 to 28 °C
0.001 + 0.002
1-20
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