Fluke 8845A User manual
®
8845A/8846A
Digital Multimeter
Users Manual
July 2006
© 2006 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
i
Table of Contents
Chapter Title Page
1 Introduction and Specifications......................................................... 1-1
Introduction........................................................................................................ 1-3
Manual Set ......................................................................................................... 1-3
About this Manual ............................................................................................. 1-4
Safety Information ............................................................................................. 1-4
General Safety Summary............................................................................... 1-4
Symbols ......................................................................................................... 1-6
Instrument Security Procedures ......................................................................... 1-6
Volatile Memory ........................................................................................... 1-6
Non Volatile Memory.................................................................................... 1-6
Media Memory (8846A Only)....................................................................... 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...................................................................................................... 1-13
DC Current .................................................................................................... 1-15
AC Current .................................................................................................... 1-16
Frequency ...................................................................................................... 1-18
Capacitance (8846A Only) ............................................................................ 1-19
Temperature (8846A only) ............................................................................ 1-19
Continuity...................................................................................................... 1-19
8845A/8846A
Users Manual
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Diode Test ..................................................................................................... 1-20
Measurement Rates ....................................................................................... 1-20
2 Preparing the Meter for Operation..................................................... 2-1
Introduction........................................................................................................ 2-3
Unpacking and Inspecting the Meter ................................................................. 2-3
Contacting Fluke................................................................................................ 2-3
Storing and Shipping the Meter ......................................................................... 2-3
Power Considerations ........................................................................................ 2-3
Selecting the Line Voltage ............................................................................ 2-4
Replacing the Fuses....................................................................................... 2-4
Connecting to Line Power ................................................................................. 2-7
Turning Power-On ............................................................................................. 2-8
Adjusting the Bail .............................................................................................. 2-8
Installing the Meter in an Equipment Rack ....................................................... 2-8
Cleaning the Meter............................................................................................. 2-9
3 Front-Panel Operation ........................................................................ 3-1
Introduction........................................................................................................ 3-3
Controls and Indicators...................................................................................... 3-3
Front-Panel Feature Descriptions .................................................................. 3-3
Display Panel................................................................................................. 3-4
Rear-Panel Connectors .................................................................................. 3-6
Adjusting the Meter’s Range......................................................................... 3-7
Navigating the Front-Panel Menu...................................................................... 3-7
Configuring the Meter for a Measurement ........................................................ 3-7
Setting the Display Resolution ...................................................................... 3-7
Setting the AC Signal Filter .......................................................................... 3-8
Setting Continuity Resistance Threshold and Diode Test Parameters .......... 3-8
Setting the Default Temperature Scale (8846A Only) .................................. 3-9
Enabling Automatic Input Impedance........................................................... 3-9
Using the Analyze Functions ............................................................................. 3-9
Collecting Statistics on Measurements.......................................................... 3-10
Testing Using Limits ..................................................................................... 3-11
Setting an Offset Value ................................................................................. 3-12
Using MX+B ................................................................................................. 3-12
Using TrendPlot............................................................................................. 3-13
Using the Histogram Function....................................................................... 3-14
Controlling Trigger Functions ........................................................................... 3-15
Choosing a Trigger Source............................................................................ 3-15
Setting the Trigger Delay .............................................................................. 3-16
Setting the Number of Samples ..................................................................... 3-16
Understanding the Measurement Complete Signal ....................................... 3-17
Accessing and Controlling Memory.............................................................. 3-17
Storing Readings in Memory......................................................................... 3-17
Recalling Readings from Memory ................................................................ 3-18
Storing Meter Configuration Information ..................................................... 3-18
Recalling a Meter Configuration ................................................................... 3-19
Managing Memory ........................................................................................ 3-20
Controlling System-Related Operations ............................................................ 3-21
Identifying Meter Errors................................................................................ 3-21
Querying the Firmware for Revision Level................................................... 3-21
Adjusting Display Brightness........................................................................ 3-21
Setting the Meter’s Date and Time................................................................ 3-21
Contents (continued)
iii
Configuring the Remote Interface ..................................................................... 3-22
Checking the Meter’s Calibration Date ............................................................. 3-22
Resetting the Meter’s Default Settings .............................................................. 3-22
4 Making Measurements........................................................................ 4-1
Introduction........................................................................................................ 4-3
Selecting Function Modifiers............................................................................. 4-3
Activating the Secondary Display ..................................................................... 4-3
Measuring Voltage............................................................................................. 4-4
Measuring DC Voltage.................................................................................. 4-4
Measuring AC Voltage.................................................................................. 4-5
Measuring Frequency and Period ...................................................................... 4-6
Measuring Resistance ........................................................................................ 4-7
Making a Two-Wire Resistance Measurement ............................................. 4-7
Making a Four-Wire Resistance Measurement ............................................. 4-8
Measuring Current ............................................................................................. 4-9
Measuring DC Current .................................................................................. 4-10
Measuring AC Current .................................................................................. 4-11
Measuring Capacitance (8846A only) ............................................................... 4-12
Measuring RTD Temperature (8846A only) ..................................................... 4-13
Testing Continuity ............................................................................................. 4-14
Checking Diodes................................................................................................ 4-14
Making a Triggered Measurement..................................................................... 4-15
Setting the Trigger Mode............................................................................... 4-16
Setting a Trigger Delay ................................................................................. 4-16
Setting Number of Samples per Trigger........................................................ 4-16
Connecting an External Trigger .................................................................... 4-17
Monitoring the Measurement-Complete Signal................................................. 4-17
Appendices
A 2X4 Test Leads............................................................................................ A-1
B Errors........................................................................................................... B-1
C RS-232 Port Connections ............................................................................ C-1
Index
8845A/8846A
Users Manual
iv
v
List of Tables
Table Title Page
1-1. Safety Information ................................................................................................. 1-5
1-2. Safety and Electrical Symbols................................................................................ 1-6
1-3. Volatile Memory Space.......................................................................................... 1-6
1-4. Non-volatile Memory Space .................................................................................. 1-7
1-3. Accessories............................................................................................................. 1-7
2-1. Line Voltage to Fuse Rating................................................................................... 2-5
2-2. Line Power Cord Types Available from Fluke ...................................................... 2-7
3-1. Front-Panel Controls and Connectors .................................................................... 3-3
3-2. Display Elements ................................................................................................... 3-5
3-3. Rear-Panel Conncetors........................................................................................... 3-6
C-1. RS-232 Pin to Signal List....................................................................................... C-1
8845A/8846A
Users Manual
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vii
List of Figures
Figure Title Page
2-1. Replacing the Line Fuse......................................................................................... 2-5
2-2. Replacing the Current Input Fuses ......................................................................... 2-6
2-3. Line Power Cords Types Available from Fluke..................................................... 2-7
2-4. Bail Adjustment and Removal ............................................................................... 2-8
3-1. TrendPlot Display .................................................................................................. 3-14
3-2. Histogram Display ................................................................................................. 3-14
4-1. Input Connections for Voltage, Resistance, and Frequency Measurements .......... 4-4
4-2. Input Connections for 4-Wire Resistance Measurements ...................................... 4-8
4-3. Input Connections for 4-wire ohms using 2x4 wire leads...................................... 4-9
4-4. Input Connections for Current Measurements Below 120 mA.............................. 4-10
4-5. Input Connections for Current Measurements Above 120 mA.............................. 4-10
4-6. Measuring Capacitance .......................................................................................... 4-12
4-7. Temperature Measurements ................................................................................... 4-13
4-8. Diode Testing Connections .................................................................................... 4-15
4-9. TRIG I/O Pin-out Description................................................................................ 4-17
8845A/8846A
Users Manual
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