Fluke 5500A/EP User manual

®
PN 602562
August 1996 Rev. 3, 4/98
© 1996, 1997, 1998 Fluke Corporation, All rights reserved. Printed in U.S.A.
All product names are trademarks of their respective companies.
5500A/EP
Enhancement Package
Users Manual

LIMITED WARRANTY & 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 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 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 or send the
product, with a description of the difficulty, postage and insurance prepaid (FOB Destination), to
the nearest Fluke authorized service center. 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 the failure was caused by misuse, alteration, accident or
abnormal condition of operation or handling, 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, WHETHER
ARISING FROM BREACH OF WARRANTY OR BASED ON CONTRACT, TORT, RELIANCE OR
ANY OTHER 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 of competent jurisdiction, such holding will not affect the validity or
enforceability of any other provision.
Fluke Corporation Fluke Europe B.V.
P.O. Box 9090 P.O. Box 1186
Everett, WA 98206-9090 5602 BD Eindhoven
U.S.A. The Netherlands

i
Table of Contents
Title Page
Introduction.......................................................................................................... 1
Unpacking the 5500A/EP Enhancement Package............................................... 2
Serial Cable ..................................................................................................... 2
Verifying the Battery Eliminator Type for Your Country.............................. 2
5500A/EP Software ............................................................................................. 3
Installing the Software .................................................................................... 3
Modify Your MET/CAL............................................................................. 3
Establishing Traceability Information........................................................ 4
Configuring the Instruments....................................................................... 5
Installing the Verification and Adjustment Procedures.............................. 5
The Switch Accessory ......................................................................................... 5
Switch Accessory Leads.................................................................................. 6
Calibrating an Instrument.................................................................................... 8
Setting up the Equipment................................................................................ 8
Connecting the Instruments............................................................................. 9
Running the Characterization Software .......................................................... 10
Running the Adjustment and Verification Procedures.................................... 10
Remote Commands for Operating the Switch Accessory................................... 14
5500A UUT Setup Parameters........................................................................ 14
Format for Addressing the Switch Accessory................................................. 14
Operating Guidelines........................................................................................... 16
Troubleshooting................................................................................................... 16
Cleaning the Switch Accessory........................................................................... 17
Calibrating the Switch Accessory........................................................................ 17
Specifications....................................................................................................... 17
Part I Specifications: Absolute System Uncertainty ........................................... 17
DC Voltage...................................................................................................... 18
DC Current ...................................................................................................... 19
Resistance........................................................................................................ 19
AC Voltage (Sinewave)................................................................................... 20
AC Current (Sinewave)................................................................................... 22
Part II Specifications: 5500A and 5500A/EP System Repeatability................... 23
DC Voltage...................................................................................................... 23
DC Current ...................................................................................................... 23
Resistance........................................................................................................ 24
AC Voltage (Sinewave)................................................................................... 25
AC Current (Sinewave)................................................................................... 26
Other Specifications............................................................................................. 27

5500A/EP
Users Manual
ii
Switch Accessory Internal Capacitor.............................................................. 27
General Specifications..................................................................................... 27

iii
List of Tables
Table Title Page
1. Switch Accessory Lead Functions........................................................................... 6
2. 5500A/EP 9001 MET/CAL Procedures................................................................... 11
3. Switch Accessory Remote Commands.................................................................... 15

5500A/EP
Users Manual
iv

v
List of Figures
Figure Title Page
1. 5500A/EP Enhancement Package Contents............................................................. 1
2. Battery Eliminators for the 5500/EP Switch Accessory.......................................... 2
3. Switch Accessory Leads .......................................................................................... 7
4. Connection for 5500A Characterization.................................................................. 12
5. Connections for DMM Calibration.......................................................................... 13

Introduction
1
Introduction
The 5500A/EP Enhancement Package is used in conjunction with a Fluke 5500A
calibrator and a Hewlett Packard 3458A 8½-digit multimeter for performing full
calibration on each of these five popular 5½-6½ digit meters:
•Fluke 8840A
•Fluke 8842A
•Hewlett Packard 34401A
•Hewlett Packard 3478A
•Keithley 2000
To use the 5500A/EP, you will need a Fluke 5500A calibrator, a Hewlett Packard 3458A
DMM, two IEEE controller cards, and a personal computer running Microsoft Windows
and Fluke MET/CAL®calibration software, Version 4.3 or higher.
5500A/EP
Users Manual
PN 602562 4-Wire Jumpers
Switch Accessory
Binding Post
Adapters
PN 602554
Battery
Eliminator
RS-232 Cable
PN 943738
Calibration
Procedure Disk
PN 613551
2
3
4
5
1
4W SHORT
FLUKE CORPORATION
MADE IN USA
1000VMAX
2A MAX
FILTER
4W COMP
2W COMP
11A CURRENT
AVL2 VL1 VH2VH1 SL SH
11AMAX
5500A / EP
SWITCH ACCESSORY
WARNING:
Hazardous Voltage may be
present on any Input or
Output terminal. To avoid
electrical shock, do not use
this accessory unless every
lead is terminated as shown
in the manual.
1000V
CAT
w5f.eps
Figure 1. 5500A/EP Enhancement Package Contents

5500A/EP Enhancement Package
Users Manual
2
Unpacking the 5500A/EP Enhancement Package
The 5500A/EP is packaged in a container designed to prevent damage during shipping.
Inspect the enclosed equipment carefully for damage and immediately report any
damage to the shipping company.
When you unpack the 5500A/EP, check for all equipment shown in Figure 1. Report any
shortage to the place of purchase or to the nearest Fluke Service Center.
Serial Cable
The serial cable is data terminal equipment as specified in EIA/TIA-574. It consists of a
male and female connector in a straight through configuration with these connections:
pin 1 and pin 6: +12V
pin 2: receive data
pin 5: ground
Verifying the Battery Eliminator Type for Your Country
Make certain the battery eliminator is the correct type for your country, referring to
Figure 2. If you do not have the right type, contact your Fluke representative.
Warning
The Fluke BE860 battery eliminator provides the necessary
voltage isolation for the switch accessory. To avoid the risk of
electrical shock, operate the switch accessory only with the
BE860 battery eliminator.
Europe PN 942602 US PN 942599
JP PN 942610
UK PN 942607AU NZ
PN 944595
w4f.eps
Figure 2. Battery Eliminators for the 5500/EP Switch Accessory

5500A/EP Software
3
5500A/EP Software
The 5500A/EP procedure disk contains procedures for characterizing the 5500A and for
adjusting and verifying the Fluke 8840A, 8842A, Hewlett Packard 34401A, Hewlett
Packard 3478A, and Keithley 2000. The calibration programs provide closed-loop
procedures that adjust and verify the DMMs listed above to their one-year specifications.
All of the procedures have been approved by the manufacturer of the associated DMM.
These procedures require MET/CAL calibration software, version 4.3 or higher installed
on your PC, configured with two IEEE interface cards (ports 0 and 1).
Installing the Software
Installation consists of four parts: modify your MET/CAL, establishing traceability for
the 5500A, the 5500A/EP (i.e., the switch accessory), and the Hewlett Packard 3458A,
entering the configuration information for each, and then installing the verification and
adjustment procedures.
Note
The 5500A/EP software utilizes Microsoft DOS calls. In Windows 3.1, be
certain the DOS prompt has the property “Close Window on Exit”. To set
that property, use the PIF Editor (under Program Manager - [Main]) to
edit the file DOSPRMPT.PIF. Be certain the box for “Close Window on
Exit” is checked. In Windows 95, this same property can be set by opening
up the MS-DOS prompt and then clicking the “Properties” icon on the title
bar. Under the “Properties” file folder, be certain the box for “Close on
exit” is checked.
Modify Your MET/CAL
Modify Your MET/CAL as follows:
1. Create a correction file directory.
You must first create a directory for the MET/CAL correction file if it does not
already exist. Neither the MET/CAL installation program, nor the Setup program on
this disk, creates a correction file directory. For most users this will be
"C:\metcal\correct" (see your PC’s operating system manual for information about
how to create and change directories).
Note
The correction file directory should be on the workstation from which the
procedure will run even if MET/CAL is run from a network. This is because
corrections are specific to the standards used for calibration. A correction
file directory must be created on each workstation on which the 5500A/EP
procedures will be run.

5500A/EP Enhancement Package
Users Manual
4
2. Edit metcal.ini.
You must edit metcal.ini on each workstation where a correction directory was
created so that the value of the "correctdir=" parameter is the directory path from
step 1. The metcal.ini file as shipped has "correctdir=none". The file metcal.ini is
located in the c:\windows directory. Use an ASCII editor like the Windows Notepad
to edit the file.
Establishing Traceability Information
To establish traceability, you need to enter asset and serial numbers for each instrument,
along with additional traceability information.
The instructions for entering traceability information is provided below for two different
MET/CAL 4.2 modes: Legacy and Database. Database mode uses new methods than
those in earlier versions of MET/CAL. For more information, refer to your Metrology
Software manuals.
Legacy Mode
1. In Legacy mode, log into MET/CAL, and open up the MET/CAL administrator
application. In the Administrator, select File/Open, then select Traceability.
2. To enter traceability information for the Fluke 5500A and the HP 3458A, select Edit
Traceability to open the Edit Trace Entry Dialog box. Select Fluke 5500A and
verify that the fields show the correct information. Edit the fields if necessary and
click OK when you are finished. Repeat for the HP 3458A.
3. To enter traceability information for the switch accessory, select Add to open the
Add New Trace Entry dialog box. Type “Fluke 5500EP” into the top field. Fill in the
remainder of the dialog box and click OK when you are finished.
Note
The 5500A/EP does not require periodic calibration, but you must enter a
calibration interval. Enter a lengthy period of time in the Interval box that
permits infrequent calibration (i.e., 1095 days, or three years).
Database Mode
1. In Database Mode, open the MET/CAL Manual Edit Tool. Select Records/New to
open the Inventory screen.
2. In the Inventory screen, fill in the asset number for one of the three instruments, and
fill out the remaining information. Repeat for each instrument: the Fluke 5500A, the
HP 3458A, and the Fluke 5500A/EP.

The Switch Accessory
5
Configuring the Instruments
Once you have entered the instruments traceability information, you must verify the
instruments’ configuration, to ensure the calibration system communicates properly.
1. Open the MET/CAL Editor. Select Tools/Edit Configuration (or press F12) to open
the Edit Configuration dialog box. Fill in the dialog box as follows:
•Select the Fluke 5500A if it is already configured. If it is not configured, select
Add; then select Fluke 5500A in the drop-down list. Type in the same asset
number you entered for the traceability information.
•Choose IEEE-488 as the remote interface, and enter the address, if necessary.
The factory default is 4.
•Under Extended Performance, click the box next to 5500A/EP so it contains an
‘x’. Then click OK.
2. Repeat for the HP 3458A. The IEEE-488 address default is 22. If you change these
addresses, be sure you use different ones for the Fluke 5500A and the HP 3458A.
3. Repeat for the Fluke 5500A/EP. For this instrument, you will need to type “Fluke
5500EP” in the top field. Then select the following parameters:
•Choose Serial as the remote interface.
•Choose COM5500 as the port.
•Enter the alias as 5500EP.
Installing the Verification and Adjustment Procedures
Place the 5500A/EP disk into disk drive A or B, and select File/Run from the Program
Manager. Type “a:setup” or “b:setup” and click OK. Follow the on screen prompts.
When the “Select Calibrator Dialog” is displayed, select “All”. Install all procedures
displayed in the “Procedure Selection Dialog”. Procedures are installed in compiled form
and are ready to be executed from the Run Time.
The Switch Accessory
The switch accessory handles all analog outputs that are sourced by the 5500A,
operating according to remote commands sent over the 5500A serial bus. It contains
shielded test leads, an internal 4-wire ohms short, and a 0.01 µF capacitive filter for
high-resistive measurements that may require extra noise filtering.
The switch accessory operates as a routing accessory between either of the two sets of
instruments listed below:
•The 5500A and the Hewlett Packard 3458A for characterizing the 5500A.
•The 5500A and the DMM you are calibrating.
Warning
Lethal voltages can appear on any one of the switch
accessory’s terminals. To avoid electrical shock, never operate
the switch accessory unless all leads are connected to an
instrument according to the instructions in this manual.

5500A/EP Enhancement Package
Users Manual
6
Switch Accessory Leads
The switch accessory leads are shown in Figure 3 and their functions are provided in
Table 1. The functions refer to the terms provided on the panels for the 5500A, Hewlett
Packard 3458A, and the specified DMMs.
Table 1. Switch Accessory Lead Functions
Output Leads Switch Accessory Output DMM or Hewlett Packard 3458A Input
1A: 11A max. Current High Input
2VL1 & VL2: V, 2W COMP Voltage Low Input
3VH1 & VH2: V, 2W COMP Voltage High Input
4SL: A, 4W COMP 4-Wire ΩLow Sense Input
5SH: A, 4W COMP 4-Wire ΩHigh Sense Input
Input Leads Switch Accessory Input Fluke 5500A Calibrator Output
6NORMAL LO NORMAL V, Ω, RTD LO
7NORMAL HI NORMAL V, Ω, RTD HI
8AUX LO AUX A, Ω-COMP, AUX V LO
9AUX HI AUX A, Ω-COMP, AUX V HI

The Switch Accessory
7
1
2
23
34
45
5
1
4W SHORT
FLUKE CORPORATION
MADE IN USA
1000V MAX
2A MAX
FILTER
4W COMP
2W COMP
11A CURRENT
5500A NORM 5500A AUX
AVL2 VL1 VH2VH1 SL SH
HI
LO HILO
11A MAX
5500A / EP
SWITCH ACCESSORY
WARNING:
Hazardous Voltage may be present on any Input or Output terminal. To avoid electrical shock, do not use this accessory unless every lead is terminated as shown in the manual.
1000V
CAT
6
1
2
3
4
5
7
8
9
Red Black
Red
White
Yellow
Black
Red
White
Yellow
w3f.eps
Figure 3. Switch Accessory Leads

5500A/EP Enhancement Package
Users Manual
8
Calibrating an Instrument
The DMMs specified in this manual can be adjusted and verified to traceable results, by
following the procedures in this manual. Essentially, there are two major steps to
Calibration, which are:
1. Characterizing the 5500A.
Before you perform any calibration procedure with the 5500A/EP you must
characterize the 5500A’s outputs. The characterization procedure first performs a
zero calibration on the 5500A and an automatic calibration (AUTOCAL) on the
Hewlett Packard 3458A. After the calibration procedures are complete, the Hewlett
Packard 3458A is used to measure the 5500A’s actual output at cardinal points
defined by the UUT procedures. This data is stored in a correction file within
MET/CAL.
The characterization is valid for 24 hours as long as the temperature remains within
±2oC and the humidity does not change more than ±10% RH. For convenience, you
can run the characterization unattended overnight, and the characterization will be
valid for the next workday. Or start the characterization procedure at the beginning
of each workday.
2. Adjusting and Verifying the DMM.
Once the characterization is complete, the DMM adjustment and verification
procedures can be performed, provided the MET/CAL procedures have been
installed and compiled on the PC. The MET/CAL program prompts you through the
connection process, allowing for a stabilization period to eliminate thermal emfs in
the system. It also automatically performs a zeroing operation on the 5500A.
Setting up the Equipment
The 5500A/EP is designed to work with the same hardware configuration for both the
characterization of the 5500A, and adjustment and verification of the DMM. The only
difference between the two setups is the use of a Hewlett Packard 3458A for
characterization. Once characterization is complete, you simply disconnect the Hewlett
Packard 3458A and replace it with the DMM you are calibrating, using the same
connections.
Find a location where you can permanently keep the setup. Your location must provide
space for the 5500A calibrator, room to place the switch accessory in front of the 5500A,
and ample room on top or preferably to the left of the 5500A to place the DMM or the
Hewlett Packard 3458A.
Note
When the switch accessory is in operation, high value resistances, which
are highly susceptible to noise pickup, are being sourced. The switch
accessory’s leads contain shielding, and an additional capacitive filter is
available to provide additional filtering. To minimize noise pickup, remain
at a distance of at least 0.5 meters from the switch accessory during
operation.
Warning
Hazardous Voltage may be present on any Input or Output
terminal of the 5500A/EP switch accessory. To avoid electrical
shock, do not use this accessory unless every lead is
terminated as shown in this manual.

Calibrating an Instrument
9
Connecting the Instruments
This procedure sets up the instruments in their permanent configuration for both the
characterization of the 5500A, and adjustment and verification of the DMM. Refer to
Figures 4 and 5 during setup.
Warning
The binding post adapters have retractable safety shrouds that
may expose the metal plug. To avoid electrical shock, connect
the binding post adapters to the Hewlett Packard 3458A before
you make any other connections, and always make sure the
plug is securely inserted into the Hewlett Packard 3458A. The
binding post adapters have a manufacturer’s rating of 1000V
rms and 3A and should not be used beyond these ratings.
1. Check your hardware configuration. The switch accessory should be placed in front
of the 5500A. The Hewlett Packard 3458A or the DMM should be placed either on
top of the 5500A or off to the left side.
2. Use the serial cable to connect the serial port on the switch accessory to the Serial 2
to UUT connector on the 5500A. No adapters should be necessary.
3. Use the IEEE-488 bus to connect the IEEE-488 connector on the 5500A to the IEEE
Port 0 on the PC running MET/CAL.
4. Connect the battery eliminator cable to the switch accessory. Plug the switch
accessory’s battery eliminator into a wall outlet.
5. Connect the PC to the Hewlett Packard 3458A or to the DMM according to one of
the following instructions.
•For characterization, connect the IEEE-488 port on the Hewlett Packard 3458A
to the IEEE Port 0 on the PC running MET/CAL. You may connect it to the back
of the connector running from the 5500A.
•For verification and adjustment of a DMM, connect the IEEE-488 port on the
DMM to the IEEE Port 1 connector on the PC running MET/CAL.
6. The switch accessory’s input leads are the shorter ones that are designed to reach the
5500A when the switch accessory is placed directly in front of it. The output leads
connect to the Hewlett Packard 3458A or DMM. Connect all leads according to
Table 1 under “The Switch Accessory.” Refer to Figures 4 and 5.
Before you connect the switch accessory to the Hewlett Packard 3458A, make sure
the binding post adapters are connected to its inputs.
Warning
Press Ron the 5500A before connecting the switch
accessory. Resetting the 5500A helps prevent voltages from
being present at its connectors, or at the terminals of the
switch accessory.

5500A/EP Enhancement Package
Users Manual
10
Running the Characterization Software
You need to characterize the 5500A every 24 hours to prepare it for calibration during
the remainder of that day. Before you run the characterization software, follow the
instructions for connecting the hardware, referring to Figure 4.
Follow these steps to run the characterization procedure.
1. Open the MET/CAL program group and select the Runtime module.
2. From the procedure list, select the program:
Fluke 5500A: (24 hr.) CAL CHAR /3458 /5500A/EP
3. Follow the prompts to complete the program. The MET/CAL program allows for
settling times after any additional connections are made during the procedure.
Note
During the Characterization process, when prompted for the asset number,
enter the asset number of the EP Switch Accessory, and not the 5500A
Calibrator.
Running the Adjustment and Verification Procedures
To adjust and verify a DMM, make certain the 5500A has been characterized within the
past 24 hours according to the instructions in this manual. Before you run the adjustment
and verification software, remove the Hewlett Packard 3458A from the calibration
system and install the DMM you are calibrating, referring to Figure 5.
Follow these steps to verify and adjust the DMM.
1. Open the MET/CAL program group and select the Runtime module.
2. Select the procedure you need to run and follow the prompts to complete the
program. You will be instructed to make some connections to the hardware for
zeroing during the procedure. The MET/CAL program allows for settling times after
any of these connections take place.
The verification and adjustment procedures are listed in Table 2.

Calibrating an Instrument
11
Table 2. 5500A/EP MET/CAL Procedures
Name that appears in procedure directory Function of procedure
Fluke 8840A: CAL ADJ IEEE /5500A/EP Adjusts the Fluke 8840A
Fluke 8840A: (1 yr.) CAL VER IEEE /5500A/EP Verifies the Fluke 8840A
Fluke 8842A: CAL ADJ IEEE /5500A/EP Adjusts the Fluke 8842A
Fluke 8842A: (1 yr.) CAL VER IEEE /5500A/EP Verifies the Fluke 8842A
HP 34401A: (1 yr.) CAL ADJ IEEE /5500A/EP Adjusts the Hewlett Packard 34401A
HP 34401A: (1 yr.) CAL VER IEEE /5500A/EP Verifies the Hewlett Packard 34401A
HP 3478A: CAL ADJ IEEE /5500A/EP Adjusts the Hewlett Packard 3478A
HP 3478A: (1 yr.) CAL VER IEEE /5500A/EP Verifies the Hewlett Packard 3478A
Keithley 2000: (1 yr.) CAL ADJ IEEE /5500A/EP Adjusts the Keithley 2000
Keithley 2000: (1 yr.) CAL VER IEEE /5500A/EP Verifies the Keithley 2000
Fluke 5500A: (24 hr.) CAL CHAR /3458 /5500A/EP Characterizes the Fluke 5500A

5500A/EP Enhancement Package
Users Manual
12
HI
LO
5500A
AUX 5500A
NORM
AUXNORMAL SCOPE
TRIG
OUT
Fluke 5500A (Front)
INPUT
SENSE
GRD 1A 250V
HI HI
LO LO
I
200V PK
Wall Outlet
Fluke 5500A (Back)
Fluke 5500EP
HP3458 (Front)
HP3458 (Back)
Yellow
White
Red
Red
Black
Battery
Eliminator
Serial 1
From Host
IEEE-488
Serial 2
To UUT
IEEE-488
A SH SL VH1 VH2 VL1 VL2
To PC
IEEE Port 0
LO
HI LO
HI
White
Red
Black
Yellow
w2f.eps
Figure 4. Connections for 5500A Characterization

Calibrating an Instrument
13
HI
LO
5500A
AUX 5500A
NORM
Wall Outlet
AUXNORMAL SCOPE
Fluke 5500A (Front)
Fluke 5500A (Back)
Fluke 5500EP
Fluke 8842 (Back)
Yellow
White
Red Red
Black
Battery
Eliminator
Serial 1
From Host
IEEE-488
Serial 2
To UUT
IEEE-488
To PC
IEEE Port 0
LO
HI LO
HI
Fluke 8842A (Front)
HIHI
LOLO
2A
INPUT SENSE
A SH SL VH1 VH2 VL1 VL2
White
Red
Black
Yellow
TRIG
OUT
To PC
IEEE Port 1
w1f.eps
Figure 5. Connections for DMM Calibration