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Keysight 34405A 5 ½ Digit
Multimeter
User’s and
Service Guide
Notices
CAUTION
WARNING
© Keysight Technologies 2006 - 2014
No p art o f this manu al may be re produce d in
any form or by any means (including electronic storage and retrieval or translation
into a foreign language) without prior agreement and written consent from Keysight
Technologies as governed by United States
and international copyright laws.
Manual Part Number
34405-91000
Edition
Edition 13, August 2014
Printed in Malaysia
Keysight Technologies
1400 Fountaingrove Parkway
Santa Rosa, CA 95403
Software Revision
This guide is valid for the firmware that was
installed in the instrument at the time of
manufacture. However, upgrading the firmware may add or change product features.
For the latest firmware and documentation,
go to the product page at:
Warranty
The material contained in this document is provided “as is,” and is subject to being changed, without notice,
in future editions. Further, to the maximum extent permitted by applicable
law, Keysight disclaims all warranties, either express or implied, with
regard to this manual and any information contained herein, including
but not limited to the implied warranties of merchantability and fitness for
a particular purpose. Keysight shall
not be liable for errors or for incidental or consequential damages in connection with the furnishing, use, or
performance of this document or of
any information contained herein.
Should Keysight and the user have a
separate written agreement with
warranty terms covering the material
in this document that conflict with
these terms, the warranty terms in the
separate agreement shall control.
Technology Licenses
The hardware and/or software described in
this document are furnished under a license
and may be used or copied only in accordance with the terms of such license.
Restricted Rights Legend
U.S. Government Restricted Rights. Software and technical data rights granted to
the federal government include only those
rights customarily provided to end user customers. Keysight provides this customary
commercial license in Software and technical data pursuant to FAR 12.211 (Technical
Data) and 12.212 (Computer Software) and,
for the Department of Defense, DFARS
252.227-7015 (Technical Data - Commercial
Items) and DFARS 227.7202-3 (Rights in
Commercial Computer Software or Computer Software Documentation).
Safety Notices
A CAUTION notice denotes a hazard. It calls attention to an operating procedure, practice, or the like
that, if not correctly performed or
adhered to, could result in damage
to the product or loss of important
data. Do not proceed beyond a
CAUTION notice until the indicated
conditions are fully understood and
met.
A WARNING notice denotes a
hazard. It calls attention to an
operating procedure, practice, or
the like that, if not correctly performed or adhered to, could result
in personal injury or death. Do not
proceed beyond a WARNING
notice until the indicated conditions are fully understood and
met.
II 34405A User’s and Service Guide
Safety Information
WARNING
WARNING
WARNING
WARNING
Do not defeat power cord safety ground feature. Plug in to a grounded (earthed) outlet.
Do not use product in any manner not specified by the manufacturer.
Do not install substitute parts or perform
any unauthorized modification to the product. Return the product to a Keysight Technologies Sales and Service Office for service
and repair to ensure that safety features are
maintained.
Safety Symbols
Earth Ground
Main Power and Test Input Disconnect: Unplug instrument from
wall outlet, remove power cord,
and remove all probes from all
terminals before servicing. Only
qualified, service-trained personnel should remove the cover from
the instrument.
Protection Limits: To avoid instrument damage and the risk of electric shock, do not exceed any of
the Protection Limits defined in
the following section.
Chassis Ground
CAT II (300V) IEC Measurement Category II.
Risk of electric shock
Refer to manual for additional safety information
Inputs may be connected to
mains (up to 300 VAC) under
Category II overvoltage conditions.
Line and Current Protection
Fuses: For continued protection
against fire, replace the line fuse
and the current-protection fuse
only with fuses of the specified
type and rating.
IEC Measurement Category II. The
HI and LO input terminals may be
connected to mains in IEC Category II installations for line voltages up to 300 VAC. To avoid the
danger of electric shock, do not
connect the inputs to mains for
line voltages above 300 VAC. See
"IEC Measurement Category II
Overvoltage Protection" on the
following page for further information.
34405A User’s and Service Guide III
12A
rms
1000VDC
500Vpk
1.2A
rms
1.25A/500V FH
LO
CAT II (300V)
750VAC
HI
I
V
12A
Fused
A
C
D
B
Protection Limits
The Keysight 34405A Digital Multimeter
provides protection circuitry to prevent
damage to the instrument and to protect
against the danger of electric shock, provided that the Protection Limits are not
exceeded. To ensure safe operation of the
instrument, do not exceed the Protection
Limits shown on the front panel, as defined
below:
Note: The front-panel terminals and current
protection fuse are shown above.
Input Terminal Protection
Limits
Protection Limits are defined for the input
terminals:
Main Input (HI and LO) Terminals. The HI
and LO input terminals are used for voltage,
resistance, capacitance, and diode test
measurements. Two Protection Limits are
defined for these terminals:
HI to LO Protection Limit. The Protection
Limit from HI to LO ("A" in the figure at
left) is 1000 VDC or 750 VAC, which is
also the maximum voltage measurement.
This limit can also be expressed as 1000
Vpk maximum.
IV 34405A User’s and Service Guide
LO to Ground Protection Limit. The LO
input terminal can safely "float" a maximum of 500 Vpk relative to ground. This is
Protection Limit "B" in the figure.
Although not shown on the figure, the Protection Limit for the HI terminal is a maximum of 1000 Vpk relative to the ground.
Therefore, the sum of the “float” voltage
and the measured voltage must not exceed
1000 Vpk
Current Input Terminal. The current input
("I") terminal has a Protection Limit of 1.2A
(rms) maximum current flowing from the LO
input terminal. This is Protection Limit "C"
in the figure. Note that the current input terminal will be at approximately the same
voltage as the LO terminal.
Note: The current-protection circuitry
includes a fuse on the front panel. To maintain protection, replace this fuse only with a
fuse of the specified type and rating.
12A Current Input Terminal. The 12A current input terminal has a Protection Limit of
12A (rms) maximum current flowing from
the LO input terminal. This is Protection
Limit "D" in the figure. Note that the current
input terminal will be at approximately the
same voltage as the LO terminal.
Note: The current-protection circuitry
includes an internal fuse. To maintain protection, service-trained personnel should
replace this fuse only with a fuse of the
specified type and rating.
IEC Measurement Category II
Overvoltage Protection
To protect against the danger of electric
shock, the Keysight 34405A Digital Multimeter provides overvoltage protection for
line-voltage mains connections meeting
both of the following conditions:
The HI and LO input terminals are connected to the mains under Measurement
Category II conditions, defined below, and
The mains are limited to a maximum line
voltage of 300 VAC.
IEC Measurement Category II includes electrical devices connected to mains at an outlet on a branch circuit. Such devices include
most small appliances, test equipment, and
other devices that plug into a branch outlet
or socket. The 34405A may be used to make
measurements with the HI and LO inputs
connected to mains in such devices, or to
the branch outlet itself (up to 300 VAC).
However, the 34405A may not be used with
its HI and LO inputs connected to mains in
permanently installed electrical devices
such as the main circuit-breaker panel,
sub-panel disconnect boxes, or permanently
wired motors. Such devices and circuits are
subject to overvoltages that may exceed the
protection limits of the 34405A.
Note: Voltages above 300 VAC may be measured only in circuits that are isolated from
mains. However, transient overvoltages are
also present on circuits that are isolated
from mains. The Keysight 34405A is
designed to safely withstand occasional
transient overvoltages up to 2500 Vpk. Do
not use this equipment to measure circuits
where transient overvoltages could exceed
this level.
Additional Notices
WARNING
This product complies with the WEEE Directive (2002/96/EC) marking requirement.
The affixed product label (see below) indicates that you must not discard this electrical/electronic product in domestic
household waste.
Product Category: With reference to the
equipment types in the WEEE directive
Annex 1, this product is classified as a
"Monitoring and Control instrumentation"
product.
Do not dispose in domestic household
waste.
The Keysight 34405A is provided
sight 34138A Test Lead Set, described
below.
st Lead Ratings
Te
Test Leads - 1000V, 15A
Fine Tip Probe Attachments - 300V, 3A
Mini Grabber Attachment - 300V, 3A
SMT Grabber Attachments - 300V, 3A
tion
Opera
ith a Key-
w
The Fine Tip, Mini Grabber, and SMT Grabber attachments plug onto the probe end of
the Test Leads.
Maintenance
If any portion of the Test Lead Set is worn or
damaged, do not use. Replace with a new
Keysight 34138A Test Lead Set.
If the Test Lead Set is used in a
manner not specified by Keysight
Technologies, the protection provided by the Test Lead Set may be
impaired. Also, do not use a damaged or worn Test Lead Set.
Instrument damage or personal
injury may result.
34405A User’s and Service Guide V
Declaration of Conformity (DoC)
NOTE
The Declaration of Conformity (DoC) for this instrument is available on the Web site. You can
search the DoC by its product model or description.
http://regulations.products.keysight.com/DoC/search.htm
If you are unable to search for the respective DoC, please contact your local Keysight
representative.
VI 34405A User’s and Service Guide
Contents
1 Getting Started Tutorial 11
Introducing the Keysight 34405A Multimeter 12
Checking the Shipping Contents 13
Connecting Power to the Multimeter 13
Adjusting the Handle 14
The Front Panel at a Glance 15
The Display at a Glance 16
The Rear Panel at a Glance 17
Remote Operation 18
Configuring and Connecting the USB Interface 18
SCPI Commands 18
Making Measurements 20
Measuring AC or DC Voltage 20
Measuring Resistance 21
Measuring AC (RMS) or DC Current up to 1.2A 21
Measuring AC (RMS) or DC Current up to 12A 22
Measuring Frequency 22
Testing Continuity 23
Checking Diodes 23
Measuring Capacitance 24
Measuring Temperature 24
Selecting a Range 25
Setting the Resolution 26
2 Features and Functions 27
Math Operations 28
Null 29
dBm 29
dB 30
Min/Max 30
Limit 31
Hold 31
34405A User’s and Service Guide VII
Contents
Math Annunciators 32
Using the Secondary Display 33
Measurement Functions and the Secondary Display 33
Math Operations and the Secondary Display 35
Using the Utility Menu 36
Changing Configurable Settings 37
Reading Error Messages 38
The Beeper 39
Editing Values in the Secondary Display 40
Selecting the Value to Edit 40
Editing Values 40
Storing and Recalling Instrument States 41
Storing a State 41
Recalling a Stored State 42
Reset/Power-On State 43
Triggering the Multimeter 45
3 Measurement Tutorial 47
DC Measurement Considerations 48
Noise Rejection 49
Resistance Measurement Considerations 51
AC Measurements 52
True RMS AC Measurements 53
Other Primary Measurement Functions 56
Frequency Measurement Errors 56
DC Current Measurements 56
Capacitance Measurements 57
Temperature Measurements 58
Other Sources of Measurement Error 59
4 Performance Tests and Calibration 63
Calibration Overview 64
Closed - Case Electronic Calibration 64
Keysight Technologies Calibration Services 64
Calibration Interval 64
Time Required for Calibration 65
Recommended Test Equipment 66
VIII 34405A User’s and Service Guide
Test Considerations 67
Input Connections 67
Performance Verification Tests Overview 68
Self -Test 68
Quick Performance Check 69
Performance Verification Tests 70
Zero Offset Verification 71
Gain Verification 73
Optional AC Voltage Performance Verification Test 79
Optional AC Current Performance Verification Test 80
Optional Capacitance Performance Verification Test 81
Calibration Security 82
Unsecuring the Instrument for Calibration 83
Calibration Process 85
Using the Front Panel for Adjustments 86
Adjustments 88
Zero Adjustment 88
Gain Adjustments 89
DC Voltage Gain Adjustment Procedure 91
DC Current Gain Adjustment Procedure 92
AC Voltage Gain Adjustment Procedure 94
AC Current Gain Adjustment Procedure 95
Ohms Gain Adjustment Procedure 97
Frequency Gain Adjustment Procedure 98
Capacitance Gain Adjustment Procedure 99
Finishing the Adjustments 101
Calibration Message 102
To Read the Calibration Count 102
Calibration Errors 103
Contents
5 Disassembly and Repair 105
Operating Checklist 106
Types of Service Available 107
Repackaging for Shipment 108
Cleaning 108
To Replace the Power Line Fuse 109
To Replace a Current Input Fuse 110
Electrostatic Discharge (ESD) Precautions 112
34405A User’s and Service Guide IX
Contents
Mechanical Disassembly 113
Replaceable Parts 120
Rack Mounting 121
6 Specifications 123
[1]
DC Specifications
AC Specifications
125
[1]
126
Temperature and Capacitance Specifications
Operating Specifications 128
Supplemental Measurement Specifications 129
General Characteristics 133
To Calculate Total Measurement Error 135
Accuracy Specifications 136
Configuring for Highest Accuracy Measurements 137
Index 141
[1]
127
X 34405A User’s and Service Guide
34405A 5 ½ Digit Multimeter
User’s and Service Guide
1 Getting Started Tutorial
Introducing the Keysight 34405A Multimeter 12
Checking the Shipping Contents 13
Connecting Power to the Multimeter 13
Adjusting the Handle 14
The Front Panel at a Glance 15
The Rear Panel at a Glance 17
Measuring AC or DC Voltage 20
Measuring Resistance 21
Measuring AC (RMS) or DC Current up to 1.2A 21
Measuring AC (RMS) or DC Current up to 12A 22
Measuring Frequency 22
Testing Continuity 23
Checking Diodes 23
Measuring Capacitance 24
Measuring Temperature 24
Selecting a Range 25
Setting the Resolution 26
This chapter contains a quick tutorial showing how to use
the front panel to make measurements.
1 Getting Started Tutorial
Introducing the Keysight 34405A Multimeter
The multimeter’s key features are:
• 5 ½- digit dual display measurements
• Ten measurement functions:
• AC voltage
• DC voltage
• Two- wire resistance
• AC current
• DC current
• Frequency
• Continuity
• Diode Test
• Temperature
• Capacitance
• Six math functions:
• Null
• dBm
• dB
• Min/Max
• Limit
• Hold
• 4 ½- or 5 ½- digit measurements
• Dual display
• USB 2.0, USBTMC- USB488 device class
12 34405A User’s and Service Guide
Getting Started Tutorial 1
NOTE
Checking the Shipping Contents
Verify that you have received the following items with your multimeter:
• One test lead kit
• One power cord
• One USB interface cable
• A Quick Start Guide
• A Certificate of Calibration (test report included)
• A CD- ROM containing the remote programming online help, online
manuals, application software, and instrument drivers
• A Keysight IO Library CD- ROM
If anything is missing, contact your nearest Keysight Sales Office.
Connecting Power to the Multimeter
Connect the power cord and press the Power switch to turn on the
multimeter.
The front- panel display illuminates while the multimeter performs its
power- on self- test. (If the multimeter does not power- on, refer “Operating
Checklist” on page 106).
The multimeter powers up in the DC voltage function with autoranging
enabled. If self- test is successful, the multimeter goes to normal operation.
If the self- test is not successful, Error is displayed on the left side of the
display and an error number is displayed in the upper right side of the
display. In the unlikely event that self- test repeatedly fails, contact your
nearest Keysight Sales Office.
A more extensive self-test is available from the Utility menu see “Using the Utility Menu”
on page 36 for details.
34405A User’s and Service Guide 13
1 Getting Started Tutorial
Benchtop Positions
Carrying Position
Adjusting the Handle
To adjust the handle, grasp the handle by the sides and pull outward.
Then, rotate the handle to the desired position.
14 34405A User’s and Service Guide
The Front Panel at a Glance
12A
rms
1000VDC
500Vpk
1.2A
rms
1.25A/500V FH
LO
CAT II (300V)
750VAC
HI
I
Power
Local
Auto
Hold Utility
dBmdB
Digits
Range
Cont
NullFreq
Temp
Store
Recall
Disp
Shift
V
)))
Agilent
34405A
5 Digit Multi meter
mV DC
45
ACI
DCI
DCV ACV
Store
Recall
MnMx
Temp Limit
Null
Freq
½
12A
Fused
1
2 3 5 6 7 8 94
Edit
Enter
mV DC
Range
1 Display
2 On/Off Switch
3 Measurement Function and Resolution Keys
4 Autorange and Manual Range
5 Math Operations and Edit
6 State Store/Recall, Utility and Edit Keys
7 Shift (selects blue shifted keys) and
Local key
8 Secondary Display Key
9 Input Terminals and Current Fuse
Getting Started Tutorial 1
34405A User’s and Service Guide 15
1 Getting Started Tutorial
1 Primary Measurements and CAL Annunciator
2 Primary Measurement Function and Units
3 Math and State Storage Annunciators
4 Range and Shift Annunciators
5 System Annunciators
6 Secondary Display
7 Secondary Measurement
Function and Units
mVA DC AC
Mk Hz μnF
°C °F dBm
Remote ManRng H old Limit Null MnMx
mVA DC AC
Mk Hz μnF
°C °F dBm
MaxMinAvgN Ref R Value
Store Recall HiLo Limit
Range
CAL
Shift
5 6 7
1 2 3 4
The Display at a Glance
The System Annunciators (above the primary display) are described below
(see page 32 for Math Annunciators and Chapter 4 for the calibration
annunciator).
System Annunciator Description
Sample annunciator--indicates readings being taken.
*
Remote The multimeter is operating in the remote interface mode.
ManRng Fixed range selected (autoranging disabled).
Hold Reading hold function enabled.
Limit Limit math feature enabled
Null Null math feature enabled.
MnMx Min/Max feature enabled.
Shift Shift key has been pressed.
16 34405A User’s and Service Guide
Diode test function selected.
Continuity test function selected.
The Rear Panel at a Glance
4 AC Power Connector
5 AC Line Voltage Selector
6 AC Line Fuse
1 USB Interface Connector
2 Model and Serial Number Label
3 Chassis Ground Lug
1
3
4
2
5
6
Getting Started Tutorial 1
34405A User’s and Service Guide 17
1 Getting Started Tutorial
Local
Shift
NOTE
NOTE
Remote Operation
The instrument automatically enters the Remote state whenever SCPI
commands are received over the USB bus interface. When in the Remote
state, pressing returns the multimeter to front panel operation.
Configuring and Connecting the USB Interface
There is nothing to configure on your instrument for a USB connection.
Just connect the instrument to your PC using the USB 2.0 cable included
with the instrument.
To easily configure and verify an interface connection between the 34405A and your PC,
use the Automation–Ready CD, which is shipped with your 34405A. This CD includes the
Keysight IO Libraries Suite and the Keysight Connection Expert application.
SCPI Commands
The Keysight 34405A complies with the syntax rules and conventions of
SCPI (Standard Commands for Programmable Instruments).
For a complete discussion of 34405A SCPI syntax, refer to the Keysight 34405A
Programmer’s Reference Help, This help is provided on the Keysight 34405A Product
Reference CD-ROM that came with your instrument.
18 34405A User’s and Service Guide
Getting Started Tutorial 1
SCPI Language Version
You can determine the multimeter’s SCPI language version by sending the
SYSTem:VERSion? command from the remote interface.
• You can query the SCPI version from the remote interface only.
• The SCPI version is returned in the form “YYYY.V”, where “YYYY”
represents the year of the version, and “V” represents a version number
for that year (for example, 1994.0).
34405A User’s and Service Guide 19
1 Getting Started Tutorial
ACV
DCV
12A
rms
1000VDC
500Vpk
1.2A
rms
1.25A/500V FH
LO
CAT II (300V)
750VAC
HI
I
V
12A
Fused
AC or DC Voltage Source
mV DC
mV DC
Range
Typical DCV Display:
mV
mV AC
Range
AC
Typical ACV Display:
+
-
Making Measurements
The following pages show how to make measurement connections and how
to select measurement functions from the front panel for each of the
measurement functions.
For remote operation, refer to the MEASure Subsystem in the Keysight
34405A Online Programmer’s Reference online help.
Measuring AC or DC Voltage
AC Voltage:
• Five Ranges: 100.000 mV, 1.00000 V, 10.0000 V, 100.000 V, 750.00 V
• Measurement Method: AC coupled true rms - measures the AC component with up to 400 VDC
bias on any range.
• Crest Factor: Maximum 5:1 at full scale
• Input Impedance: 1 MΩ ± 2% in parallel with <100pF on all ranges
• Input Protection: 750V rms on all ranges (HI terminal)
20 34405A User’s and Service Guide
DC Voltage:
• Five Ranges: 100.000 mV, 1.00000 V, 10.0000 V, 100.000 V, 1000.00 V
• Measurement Method: Sigma Delta A-to-D converter
• Input Impedance: ~10 MΩ all ranges (typical)
• Input Protection: 1000V on all ranges
(HI terminal)
Getting Started Tutorial 1
Typical Display:
12A
rms
1000VDC
500Vpk
1.2A
rms
1.25A/500V FH
LO
CAT II (300V)
750VAC
HI
I
V
12A
Fused
Resistance
Test
Current
Range
ACI
DCI
Typical ACI Display:
12A
rms
1000VDC
500Vpk
1.2A
rms
1.25A/500V FH
LO
CAT II (300V)
750VAC
HI
I
V
12A
Fused
+
AC or DC Current Source
-
m A DC
m A DC
Range
m A AC
m A AC
Range
Typical DCI Display:
Measuring Resistance
• Seven Ranges: 100.000Ω, 1.00000 kΩ, 10.0000 kΩ, 100.000 kΩ, 1.00000 MΩ, 10.0000 MΩ, 100.000
MΩ
• Measurement Method: two-wire ohms
• Open-circuit voltage limited to < 5 V
• Input protection 1000 V on all ranges (HI terminal)
34405A User’s and Service Guide 21
Measuring AC (RMS) or DC Current up to 1.2A
• Three AC Current or DC Current Ranges: 10.0000 mA, 100.000 mA, 1.00000 A
• Shunt Resistance: 0.1Ω to 10 Ω for 10mA to 1A ranges
• Input Protection: Front Panel 1.25A, 500V FH fuse for I terminal
1 Getting Started Tutorial
DCI
ACI
Typical ACI Display:
12A
rms
1000VDC
500Vpk
1.2A
rms
1.25A/500V FH
LO
CAT II (300V)
750VAC
HI
I
V
12A
Fused
+
AC or DC Current Source
-
A DC
A DC
Range
A AC
A AC
Range
Typical DCI Display:
Freq
Freq
Typical Display:
12A
rms
1000VDC
500Vpk
1.2A
rms
1.25A/500V FH
LO
CAT II (300V)
750VAC
HI
I
V
12A
Fused
Frequency
Source
Hz
Range
VAC
Measuring AC (RMS) or DC Current up to 12A
• 10 Amp AC Current or DC Current Range
• Shunt Resistance: 0.01 Ω for 10A range
• Internal 15A, 600V fuse for 12A terminal
Measuring Frequency
• Five Ranges: 100.000 mV, 1.00000 V, 10.0000 V, 100.000 V, 750.00 V. Range is based on the voltage
level of the signal, not frequency.
• Measurement Method: Reciprocal counting technique.
• Signal level: 10% of range to full scale input on all ranges
• Gate Time: 0.1 second or 1 period of the input signal, whichever is longer.
• Input Protection: 750V rms on all ranges (HI terminal)
22 34405A User’s and Service Guide
Getting Started Tutorial 1
Shift
Cont )
)
)
Open Circuit Display:
12A
rms
1000VDC
500Vpk
1.2A
rms
1.25A/500V FH
LO
CAT II (300V)
750VAC
HI
I
V
12A
Fused
Open or
Closed
Circuit
Test
Current
Typical Closed Circuit Display:
Shift
Freq
Freq
Reverse Bias or Open Diode Display:
12A
rms
1000VDC
500Vpk
1.2A
rms
1.25A/500V FH
LO
CAT II (300V)
750VAC
HI
I
V
12A
Fused
Forward Bias
Test
Current
VDC
Typical Forward Biased Diode Display:
Testing Continuity
• Measurement Method: 0.83 mA ± 0.2% constant current source, < 5 V open circuit voltage.
• Response Time: 70 samples/ second with audible tone
• Continuity Threshold: 10 Ω fixed
• Input Protection: 1000 V (HI terminal)
34405A User’s and Service Guide 23
Checking Diodes
• Measurement Method: Uses 0.83 mA ± 0.2% constant current source, < 5 V open circuit voltage.
• Response Time: 70 samples/ second with audible tone
• Input Protection: 1000 V (HI terminal)
1 Getting Started Tutorial
Typical Display:
12A
rms
1000VDC
500Vpk
1.2A
rms
1.25A/500V FH
LO
CAT II (300V)
750VAC
HI
I
V
12A
Fused
+
-
Capacitance
μ F
μ F
Range
Temp
Temp
Typical Display:
12A
rms
1000VDC
500Vpk
1.2A
rms
1.25A/500V FH
LO
CAT II (300V)
750VAC
HI
I
V
12A
Fused
Test
Current
5k Ohm
Thermistor
°C
Measuring Capacitance
• Eight ranges: 1nF, 10nF, 100nF, 1µF, 10µF, 100µF, 1000µF, 10,000µF and autorange
• Measurement Method: Computed from constant current source charge time. Typical 0.2V - 1.4V AC
signal level
• Input Protection: 1000 V (HI terminal)
Measuring Temperature
• -80.0°C to 150.0 °C, -110.0°F to 300.0 °F
• Auto-ranging measurement, no manual range selection
• Measurement Method: 2-wire Ohms measurement of 5 kΩ thermistor sensor (E2308A) with
computed conversion
• Input Protection: 1000 V (HI terminal)
24 34405A User’s and Service Guide
Selecting a Range
Shift
Auto
You can let the multimeter automatically select the range using
autoranging, or you can select a fixed range using manual ranging.
Autoranging is convenient because the multimeter automatically selects the
appropriate range for sensing and displaying each measurement. However,
manual ranging results in better performance, since the multimeter does
not have to determine which range to use for each measurement.
Getting Started Tutorial 1
Selects a lower range and disables autoranging.
Selects a higher range and disables autoranging.
Selects autoranging and disables manual ranging.
• The ManRng annunciator is on when manual range is enabled.
• Autoranging is selected at power- on and after a remote reset.
• Manual ranging – If the input signal is greater than can be measured
on the selected range, the multimeter provides these overload
indications: OL from the front panel or “
interface.
• For frequency measurements, ranging applies to the signal’s input
voltage, not its frequency.
• The range is fixed for continuity (1 kΩ range) and diode (1 VDC range).
• The multimeter remembers the selected ranging method (auto or
manual) and the selected manual range for each measurement function.
• Autorange thresholds – The multimeter shifts ranges as follows:
Down range at <10% of current range
Up range at >120% of current range
• For remote operation, refer to the MEASure Subsystem in the Keysight
34405A Online Programmer’s Reference online help.
34405A User’s and Service Guide 25
\9.9E+37” from the remote
1 Getting Started Tutorial
Shift
4
Shift
Temp
5
Temp
Setting the Resolution
You can select either 4½ or 5½- digit resolution for the DCV, DCI,
resistance, ACV, ACI and frequency measurement functions.
• 5½- digit readings have the best accuracy and noise rejection.
• 4½- digit readings provide for faster readings.
• The continuity and diode test functions have a fixed, 4½-digit display.
• Capacitance and temperature have a fixed 3½- digit display.
Selects 4½- digit mode.
Selects 5½- digit mode.
• For remote operation, refer to the MEASure Subsystem in the Keysight
34405A Online Programmer’s Reference online help.
26 34405A User’s and Service Guide
34405A 5 ½ Digit Multimeter
User’s and Service Guide
2 Features and Functions
Math Operations 28
Using the Secondary Display 33
Using the Utility Menu 36
Editing Values in the Secondary Display 40
Storing and Recalling Instrument States 41
Reset/Power-On State 43
Triggering the Multimeter 45
This chapter contains detailed information on the multimeter
and how to use the front panel. It builds on information you
learned in the Quick Start Guide and the previous Getting
Started Tutorial Chapter.
2 Features and Functions
Math Operations
The table below describes the math operations that can be used with each
measurement function.
Measurement
Function
DCV
DCI
Ohms
ACV
ACI
Frequency
Capacitance
Te m p e r a t u r e
Continuity
Diode
Allowed Math Operations
Null dBm dB Min/Max Limit Hold
• All math operations can be toggled on and off by re- selecting the same
math operation.
• Only one math operation can be turned- on at a time. Selecting another
math operation when one is already on turns off the first operation and
then turns on the second math operation.
• All math operations are automatically turned- off when changing
measuring functions.
• Range changing is allowed for all math operations.
• For remote operation, refer to the CALCulate Subsystem in the Keysight
34405A Online Programmer’s Reference online help.
28 34405A User’s and Service Guide
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