BK Precision 5492B Instruction Manual

USER MANUAL

Model: 5492B, 5492BGPIB

5 ½ Bench Digital Multimeter

Safety Notice

As described in the International Electrotechnical Commission (IEC) Standard IEC 664, digital multimeter measuring circuits (e.g., B&K Models 5492B) and the USB terminal are Installation Category II (CAT II). All other instruments’ signal terminals are Installation Category I and must not be connected to mains.

This equipment is a POLLUTION DEGREE 2, INDOOR USE product.

Safety Summary

The following safety precautions apply to both operating and maintenance personnel and must be observed during all phases of operation, service, and repair of this instrument. Before applying power, follow the installation instructions and become familiar with the operating instructions for this instrument.

GROUND THE INSTRUMENT

To minimize shock hazard, the instrument chassis and cabinet must be connected to an electrical ground. This instrument is grounded through the ground conductor of the supplied, three-conductor ac power cable. The power cable must be plugged into an approved three-conductor electrical outlet. Do not alter the ground connection. Without the protective ground connection, all accessible conductive parts (including control knobs) can render an electric shock. The power jack and mating plug of the power cable meet IEC safety standards.

DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE

Do not operate the instrument in the presence of flammable gases or fumes. Operation of any electrical instrument in such an environment constitutes a definite safety hazard.

KEEP AWAY FROM LIVE CIRCUITS

Instrument covers must not be removed by operating personnel. Component replacement and internal adjustments must be made by qualified maintenance personnel. Disconnect the power cord before removing the instrument covers and replacing components. Under certain conditions, even with the power cable removed, dangerous voltages may exist. To avoid injuries, always disconnect power and discharge circuits before touching them.

DO NOT SERVICE OR ADJUST ALONE

Do not attempt any internal service or adjustment unless another person, capable of rendering first aid and resuscitation, is present.

DO NOT SUBSTITUTE PARTS OR MODIFY THE INSTRUMENT

Do not install substitute parts or perform any unauthorized modifications to this instrument.

before removing

Before connecting the line cord to the AC mains, check the rear panel AC line voltage indicator. Applying a line voltage other than the indicated voltage can

fuses. For continued fire protection, replace fuses only

static

ocedures for

handling, storing and transporting parts and subassemblies which contain

Return the instrument to B&K Precision for service and repair to ensure that safety features are maintained.

WARNINGS AND CAUTIONS

WARNING and CAUTION statements, such as the following examples, denote a hazard

and appear throughout this manual. Follow all instructions contained in these statements. A WARNING statement calls attention to an operating procedure, practice, or condition,

which, if not followed correctly, could result in injury or death to personnel. A CAUTION statement calls attention to an operating procedure, practice, or condition,

which, if not followed correctly, could result in damage to or destruction of parts or the entire product.

WARNING:

CAUTION:

Do not alter the ground connection. Without the protective ground connection, all accessible conductive parts (including control knobs) can render an electric shock. The power jack and mating plug of the power cable meet IEC safety standards.

To avoid electrical shock hazard, disconnect power cord covers. Refer servicing to qualified personnel.

destroy the AC line with those of the specified voltage and current ratings.

This product uses components which can be damaged by electrodischarge (ESD). To avoid damage, be sure to follow proper pr

ESD-sensitive components.

This product is subject to Directive 2002/96/EC of the European

Council of the European Union on waste

adopting that Directive, is marked as being put on the market after August 13, 2005, and should not be disposed of as unsorted

SAFETY SYMBOL

This symbol serves as a warning to users of the input safety ratings. Refer to the operating instructions for details.

Electrical Shock hazard.

Chassis ground symbol.

CAT I (1000V)

CAT II (300V)

IEC Measurement Category I. Inputs may be connected to mains (up to 300 VAC) under Category II overvoltage conditions.

IEC Measurement Category II.

Compliance Statements

Disposal of Old Electrical & Electronic Equipment (Applicable in the European Union and other European countries with separate collection systems)

Parliament and the electrical and electronic equipment (WEEE) , and in jurisdictions

municipal was te. Please utilize your local WEEE collection facilities in the disposition of this product and otherwise observe all applicable requirements.

CE Declaration of Conformity

The 5492B and 5492BGPIB meets the requirements of 2006/95/EC Low Voltage Directive and 2004/108/EC Electromagnet Compatibility Directive.

Low Voltage Directive

- EN61010-1: 2001 (2nd edition)

Safety requirements for electrical equipment for measurement, control, and laboratory use.

EMC Directive

- EN 61326-1:2006

- EN 61326-2-2: 2006

Electrical equipment for measurement, control, and laboratory use.

Table of Contents

Chapter 1 General Information ..................................................................................................... 9

1.1 Feature Overview ............................................................................................................... 9

1.2 Input Power and Fuse Requirements ................................................................................. 9

1.3 Package Contents ............................................................................................................ 11

Chapter 2 Overview ........................................................................................................................ 12

2.1 Front Panel Overview ....................................................................................................... 12

2.2 Screen Display ................................................................................................................. 14

2.3 Front Panel Menu Options ................................................................................................ 14

2.4 Front Panel Menu Overview ............................................................................................. 16

2.5 Rear Panel Summary ....................................................................................................... 17

2.6 Power up .......................................................................................................................... 18

2.6.1 Power Line Connection .................................................................................................... 18

2.6.2 Power-up Sequence ......................................................................................................... 18

2.6.3 High Energy Circuit Safety Precautions ........................................................................... 19

2.6.4 Power-on Default s ............................................................................................................ 19

2.6.5 Warm-up t ime ................................................................................................................... 21

Chapter 3 Basic Measurements .................................................................................................. 22

3.1 Overview .......................................................................................................................... 22

3.2 Measuring Voltage ............................................................................................................ 22

3.2.1 Connections ...................................................................................................................... 22

3.2.2 Crest factor ....................................................................................................................... 24

3.3 Measuring Current ............................................................................................................ 24

3.3.1 Connections ...................................................................................................................... 24

3.3.2 Front Panel Fuse Replac ement ........................................................................................ 25

3.4 Measuring Resistance ...................................................................................................... 26

3.4.1 Connections ...................................................................................................................... 26

3.4.2 Shielding ........................................................................................................................... 27

3.5 Measuring Frequency and Period ..................................................................................... 28

3.5.1 Trigger Level and Measurement Errors ............................................................................ 28

3.5.2 Gate Time ......................................................................................................................... 28

3.5.3 Connections ...................................................................................................................... 28

3.6 Measuring Continuity ........................................................................................................ 29

3.6.1 Connections ...................................................................................................................... 29

3.6.2 Threshold resistanc e level ................................................................................................ 30

3.7 Testing Diode ................................................................................................................... 30

3.7.1 Connections ...................................................................................................................... 30

3.7.2 Current Range .................................................................................................................. 31

3.8 Math Functions ................................................................................................................. 32

3.8.1 mX+b................................................................................................................................. 32

3.8.2 Percent .............................................................................................................................. 33

3.8.3 dB Calculation ................................................................................................................... 34

3.8.4 dBm Calculation ................................................................................................................ 35

Chapter 4 Measurement Options .............................................................................................. 37

4.1 Measurement configuration .............................................................................................. 37

4.1.1 Range ............................................................................................................................... 37

4.1.2 Filter .................................................................................................................................. 38

4.1.3 Relative ............................................................................................................................. 39

4.1.4 Rate .................................................................................................................................. 40

4.2 Trigger Operations ............................................................................................................ 41

4.2.1 Trigger Model .................................................................................................................... 41

4.2.2 EXT T rig & VM Comp ....................................................................................................... 44

4.3 Buffer Operations ............................................................................................................. 44

4.3.1 Store Reading ................................................................................................................... 45

4.3.2 Recall Readings ................................................................................................................ 46

4.3.3 Buffer Statistics ................................................................................................................. 47

4.4 Limit Operations ............................................................................................................... 47

4.4.1 Enabling limits ................................................................................................................... 48

4.4.2 Setting Limit Values .......................................................................................................... 48

4.4.3 Configure Limit Beep ........................................................................................................ 49

4.5 System Operations ........................................................................................................... 49

4.5.1 Beeper Control .................................................................................................................. 50

4.5.2 Save Settings .................................................................................................................... 50

4.5.3 Restore Settings ............................................................................................................... 51

4.5.4 Display Control ................................................................................................................. 51

4.5.5 Key Sound ........................................................................................................................ 52

4.5.6 Self-test ............................................................................................................................. 52

4.5.7 Calibration ......................................................................................................................... 53

Chapter 5 Remote Operation....................................................................................................... 54

5.1 Selecting an Interface ....................................................................................................... 54

5.1.1 USB (Virtual COM) Interface ............................................................................................ 54

5.1.2 RS-232 Serial Interface .................................................................................................... 55

5.1.3 GPIB Interface (model 5492BGPIB only) ......................................................................... 55

5.2 USB & RS-232 Interface Operation .................................................................................. 56

5.2.1 RS-232 Connection .......................................................................................................... 56

5.2.2 Sending and receiving dat a .............................................................................................. 57

5.2.3 Selecting Baud Rate ......................................................................................................... 57

5.2.4 Selecting Parity Mo de ....................................................................................................... 57

5.2.5 Selecting Terminal Character ........................................................................................... 58

5.2.6 Selecting Echoing ............................................................................................................. 58

5.2.7 Software Protocol ............................................................................................................. 59

5.3 GPIB Interface operation (model 5492BGPIB only) .......................................................... 60

5.3.1 GPIB Connection .............................................................................................................. 60

5.3.2 GPIB Interface Capability ................................................................................................. 61

5.3.3 GPIB Addressing .............................................................................................................. 61

5.4 Data Format ..................................................................................................................... 61

Chapter 6 SCPI Command Reference ....................................................................................... 62

6.1 Command Structure ......................................................................................................... 62

6.2 Command Syntax ............................................................................................................. 63

6.2.1 Commands and co m mand parameters ............................................................................ 63

6.2.2 Short-form Rules ............................................................................................................... 64

6.2.3 Basic Rules of Com mand Structure ................................................................................. 65

6.2.4 Multiple Command Rules ................................................................................................. 65

6.2.5 Command Path Rules ...................................................................................................... 65

6.3 Command Reference ....................................................................................................... 66

6.3.1 Measurement Commands ................................................................................................ 66

6.3.2 DISPlay subsystem ........................................................................................................... 70

6.3.3 CALCulate Subsyst em ..................................................................................................... 70

6.3.4 SENSe subsystem command ........................................................................................... 79

6.3.5 SYSTem Subsystem ......................................................................................................... 92

6.3.6 UNIT Subsystem ............................................................................................................... 94

6.3.7 TRIGger Subsystem ......................................................................................................... 97

6.3.8 Common Comm ands ........................................................................................................ 99

Chapter 7 Troubleshooting Guide .......................................................................................... 100

7.1 Frequently Asked Questions ........................................................................................... 100

7.2 Error Messages .............................................................................................................. 101

Chapter 8 Specifications ............................................................................................................. 102

8.1 Technical Specifications ................................................................................................. 102

SERVICE INFORMATION ............................................................................................................ 110

LIMITED THREE-YEAR WARRANTY ..................................................................................... 110

General information

Chapter 1 General Information

This chapter is outlined as follows:

1.1 Feature Overview

1.2 Input Power and Fuse Requirements

1.3 Package Contents

1.1 Feature Overview

5492B is a 5½ digital multimeter with high accuracy, stability and speed. It has a 0.01% DC voltage basic accuracy, 0.03% basic resistance accuracy and broad ranges that can measure:

 DC volt age up to 1000 V  AC (RMS) voltage up to 750 V, or about 1000 V Peak  DC current up to 12 A  AC (RMS) current up to 12 A  Two and four-wire resistance up to 120 MΩ  Frequency from 5 Hz to 1 MHz

1.2 Input Power and Fuse Requirements

The 5492B digital multimeter can operate on 110 V or 220 V with +/- 10% tolerance at 60 Hz or 50 Hz with +/- 5% tolerance respectively. Before powering the instrument, please check for correct power input setup that corres pon ds to t he li ne volt age t o be used f or op eratio n. Note the l abe l in the r ear labe l, as shown below:

RATING FUSE

~110 V / 60 Hz T1AL, 250 V ~220 V / 50 Hz T500mAL, 250 V

There are two items to check for:

1. Check that the correct fuse is placed insi de the fuse box. Referring to the above table, use a 1 A fuse for 110 V/ 60 Hz operation, an d 500 mA fuse for 220 V/50 Hz operation.

2. Check the fuse holder position. There is a voltage indicator window on the front face o f the fuse box that indicates the selected line voltage. To c hange or select the appropriate line voltage, remove the fuse box and pul l out and rotate the fuse holder, as illustrated below:

Fuse Box

110

remove fuse box.

Voltage Indicator Window

General information

Press both sides indicated by the arrows and pull to

Fuse Holder

220

110

Fuse Box

There is a second fuse with a fuse holder located in the front panel of the multimeter. This is an over current protection fuse for the low current measurement input. It is rated for a T2AL, 250 V fuse. To remove and replace this fuse, see the illustration below:

To remove, use a flat head screw driver or a coin to insert into the slid and turn counter-clockwise to open. Similarly to put back the fuse box, push the box down and turn clockwise.

110

There is a third fuse locat ed ins ide the instrument which prot ects the 12 A input terminal if current exceeds the maximum rat i ng. It is a 6 x 32 mm 250V, 20 A fast acting high energy ceramic fuse.

General information

1.3 Package Contents

Please inspect the instrument mechanically and electrically upon receiving it. Unpack all items from the shipping carton, and check for any obvious signs of physical damage that may have occurred during transportation. Report any damage to the shipping agent immediately. Save the original packing carton for possible future reshipment. Every meter is shipped with the following contents:

 5492B/5492BGPIB 5½ digit multimeter  TL35B Test Leads (one set)  AC Power cord  Spare fuses  User Manual  USB Cable  Certificate of Calibration and Test Report

Verify that all items above are included in the shipping container. If anything is missing, please contact B&K Precision.

Overview

Chapter 2 Overview

This chapter is outlined as follows:

2.1 Front Panel Overview

2.2 Screen Display

2.3 Front Panel Menu Options

2.4 Front Panel Menu Overview

2.5 Rear Panel Summary

2.6 Power up

2.1 Front Panel Overview

The front panel of the B&K 5492B is shown in Figure 2-1. This figure includes some important abbreviated information that s hould be reviewed befor e oper ating the instrument.

Figure 1 - Front Panel View

Overview

1. Measur ement function keys Select measurement function: DC voltage and current, AC voltage and current, 2-wire and 4-wire

resistance, frequency, period, continuity and diode test.

2. Math function keys Select math function: mX+b, %, dB, dBm and Rel.

3. Menu oper ation key s

→ Open/Close menu

→ Recall the menu performed last

Move through selections within menu level, sub-menu level or parameter level

Move through se lections within menu level, sub-menu level or parameter level.

Move up a lev el. Move down a level. (ENTER) Save the changes made o n “parameter” level, and return to the “sub-menu” level.

(ESC) Cancel the changes made on “parameter” level, and return to the “sub-menu”

level.

4. Range and measure me nt speed keys

Select a higher range and disab le auto ranging. Select a lower range and disable auto ranging.

T oggle between auto ranging and manual ranging.

→ Set measurement speed to Fast .

→ Set measurement speed to M edi um.

→ Set measurement speed to Slow.

5. T ri g/Ho ld Key

Trigger a measurement from the front panel.

→ Hold a stable reading on the display when selected numbers of samples are

6. Shift/Local keys

Used to access shifted keys (labels are in blue). (LOCAL) Exit remote operation and set back to local oper ation.

within the selected toleran c e.

Overview

2.2 Screen Display

Figure 2-2 Display A nnunciator s

* (asterisk) Instrument is ready to st ore readi ngs ( w hen in system menu) /

Reading is being stored (w hen in measure ment mode)

(Diode) Instrument is in diode testing function

(Speaker) Beeper on for continuity testing function 4W Multimeter is in 4-wire resistance measurement mode. ADRS Multimeter is addressed to listen or talk over the GPIB interface AUTO Auto ranging enabled ERR Hardware or remote control error detected FAST Fast reading rate FILT Digital filter enabled HOLD Reading HOLD is enabled MATH A math operation is enabled (mX+b, %, dB, dBm). MED Medium reading rate MEM Turns on when reading memor y is enabled REL Relative reading displayed RMT Multimeter is in remote mode SHIFT Accessing shifted keys SLOW Slow reading rate

TRIG Multimeter is wait ing for a trigger (manual, bus, or external trigger).

2.3 Front Panel Menu Options

A : MEA Surement MENU

1:CONTINUITY → 2:FILTER → 3:FILT TYPE → 4:FILT COUNT

1. CONTINUITY Select the continuity beeper threshold: 1 Ω to 1000 Ω

2. FILTER Enable or disable FILTER function.

3. FILT TYPE Select the type of filter. Select MOVNG AV (Moving Average) or REPEAT (Repeating Average).

4. FILT COUNT Set the number of readi ngs to be filtered or averaged.

B : MATH MENU

1:SET M → 2:SET B → 3:PERCENT → 4:dB REF → 5:dBm REF → 6:LIMIT TEST → 7:HIGH LIMIT

→ 8:LOW LIMITT→ 9:LIMIT BEEP

1. SET M Set the scale factor M for MX+B fun ct ion.

2. SET B Set the offset factor B for MX+B function.

Overview

3. PERCENT Set the reference value for PERCENT function.

4. dB REF Set the dB reference voltage value.

5. dBm REF Set the dBm reference impedance value.

6. LIMIT TEST Enable or disable the limit testing.

7. HIGH LIMIT Set the high limit for limit test ing.

8. LOW LIMIT Set the low limit for limit testing.

9. LIMIT BEEP Set the beep mode for limit testing. Select from: NEVER, HI, IN, LO, OUT.

C : TRIGger MEN U

1:TRIG MODE → 2:TRIG DELAY

1. TRIG MODE Select the trigger source. Select IMM (Immediate), MAN (Manual), BUS, or EXT (External) trigger source.

2. TRIG DELAY Select AUTO or MANUal trigger delay mode. Selecting manual will allow you to specify a time interval which is ins er t ed before a measure ment.

D : SYStem MENU

1:RDGS STORE → 2:RDGS COUNT → 3:SAVED RDGS → 4:BEEP →5:SAVE CNFG → 6:LOAD CNFG → 7:DISPLAY → 8:KEY SOUND → 9:TEST

1. RDGS STORE Enable or disable reading me m or y.

2. RDGS COUNT Set the number of readings to be saved (2 to 512).

3. SAVED RDGS Recall readings stored in memory.

4. BEEP Enable or disable the beeper fu nction

5. SAVE CNFG Save the present configuration as one of the 10 user’s settings.

6. LOAD CNFG Restore factory or one of the 10 user’s settings

7. DISPLAY Enable or disable the front panel display.

8. KEY SOUN D Enable or disable the key sound w hen you press a key.

9. TEST Perform a complete sel f-test.

E : Input / Outp ut MENU

1:GPIB ADDR → 2:INTERFACE → 3:BAUD RATE→ 4:PARITY→ 5:TX TERM→ 6:RETURN

1. GPIB ADDR Set the GPIB bus address. (0 to 31)

2. INTERFACE Select between GPIB and USB/RS232 as the remote control inter face.

3. BAUD RATE Select the baud rate for USB/RS232C operation. Select from: 115.2K, 57.6K, 38.4K, 19.2K, 9600,4800, 2400.

4. PARITY Select the parity mode for USB/RS232C operation. Select from: NONE, EVEN, ODD.

5. TX TERM Select the terminal char acter for USB/RS232C communication. Selection from: LF, CR, LFCR

6. RETURN Enable or disable echoing command strings.

F : CALibrati on MEN U (This function is not available)

1:SECURED → 3:CAL DATE → 4:CAL COUNT

Overview

level is too small for the

selected command. The minimum value allowed is displayed for you to

level is too large for the

2.4 Front Panel Men u Overvie w

The menu is organized in a top-down tree struc ture with three levels ( m enus, submenus and parameter s) as shown in Figure 2-3. You can use down ( ) or up ( ) keys to browse through the menu tree from one level to another. Each of the three levels has several choices which you can view by using left ( ) or right ( ) keys.

 T o t ur n on t he menu, press → (Menu).

Submenus

Parameters

Menus

Figure 2-3 Menu Tree

 T o t ur n off the menu, press → (Menu), or press any of the function or math keys

on the top row of front panel keys (i.e. DC V, Freq, etc.).

 To confirm a change on the “parameter” level, press (ENTER).  T o cancel a change on the “parameter” level, press (ESC).

 T o r ecall the last menu com m and t hat w as executed, press → (Recall)

The messages display ed during menu operation are listed in the following Table 2-1.

Table 2-1 Messages Displayed During Menu Operation

MESSAGES DESCRIPTION

CHANGE SAVED

TOO SMALL

TOO LARGE

FILE SAVING

FILE LOADING

SAVE SUCCEED

LOAD SUCCEED

The change made on the “parameter” level is saved. This message will be displayed after you press (ENTER) to save the changes. The value you specified on the “parameter”

edit. The value you specified on the “parameter” selected command. The maximum value allowed is displayed for you to edit. System configuration file is being saved. System configuration fil e i s being restored. System configuration file is successfully saved. System configuration file is successfully restored.

Overview

Note: If you press on the “menu” level, nothing will happen because it is at the top menu level of already. Likewise, if you press on the “parameter” level, nothing will happen because it is at the l ow est menu level.

2.5 Rear Panel Summary

The rear panel of BK 5492B is shown in Figure 2-4. This section includes important information that should be reviewed before oper ating the instrument.

Figure 2-4 Rear Panel

1. Power line fuse holder The multimeters can be configured for line v oltage of 110/220 V ± 10 % AC at line frequency of 50/60 Hz ± 5%. Power line fuse is used for instru ment pr ot ection. (220 V/500 mA or 110 V/1 A)

Note: Please use the same-type of fuse as it is in the fuse holder. To verify and replace the

fuse, remove the power cable and pull out the fuse holder. See section 1.2 for details.

2. (optional) GPIB (IEEE-488) interface (model 5492BGPIB)

3. Chassis ground screw terminal

4. RS-232 (Serial) interface

5. USB interface

6. External Tr igger BN C inpu t terminal

7. VM Comp (Voltmeter complete) BNC output terminal

8. Serial number label

Overview

2.6 Power up

2.6.1 Power Line Connection

CAUTION: Operating the instrument on an incorrect line voltage may cause damage to the instrument, possibly voidi ng the warranty.

BEFORE in place, and the fuse box inside the fuse holder is adjusted correctly. See section for details.

Follow the procedure below to connect the 5492B to line p ow er and turn on the instrument.

1. Check the line voltage and be sure it is within the acceptable range of the meter

2. Check the fuse box position inside the fuse hol der to make sure it is in the correct position that

3. Check that the correct line fuse is properly inserted into the fuse box. The f use rating between

4. Before plugging in the power cord, make sure that the front panel power switch is in the off (out)

5. Connect the female end of the supplied power cord to the AC input on the rear panel. Connect the

WARNING: The power cord supplied with the Model 5492B contains a separate ground wire for

6. Turn on the instrument by pressing the front panel pow er switch.

connecting the 5492B multimeter to a power line, please check that the correct fuse is

1.2

BEFORE

connecting into the AC input in the rear panel of the instrument. Applying an incorrect voltage

may cause damage to the instrument and void its warranty.

corresponds to the line voltage the unit will be connected to. The fuse holder will have a selected voltage label on the front to indicate the selected voltage tab for operation. Change the fuse box position to change between 110 and 220. If you’re not sure, see section

1 10V and 220V operation is different. Refer to section 1.2 for details.

position.

other end of the power cord to a grounded AC outlet.

use with grounded outlets. When proper connections are made, instrument chassis is connected to power li ne gr ou nd thr ou g h the gr ound wi re i n the p owe r cord. F ail ur e to use a grounded outlet may r esul t i n personal injury or death due to electric shock.

1.2 for details.

2.6.2 Power-up Sequence

On power-up, the multimeter performs self-tests on its EPROM and RAM and lights all segments and annunciators for about 1 second. If a failure is detected, the instrument momentarily displays an error message and the ERR an nunciator will turn on.

If the instrument passes self-tests, the firmware version and the model number will display momentarily before it is ready for use.

Overview

2.6.3 High Energy Circuit Safety Precautions

To optimize safety when measuring voltage in high energy distribution circuits, read and use the directions in the following warning.

WARNIG: Dangerous arcs of an explosive nature in a high energy circuit can cause severe

personal injury or death. If the multimeter is connected to a high energy circuit when set to a current range, low resistance range, or any other low impedance range, the circuit is virtually shorted. Dangerous arcing can result even when the multimeter is set to a voltage range if the minimum voltage spacing is red uced i n the external connections.

When making measurements in high energy circuits, use test leads and accessories that meet the following requirements:

 T est lea ds and a ccessor ie s must be fully insulate d and adhere to proper ANSI IEC CA T r ating s.  Do not use test leads or accessories that decrease voltage spacing. This diminishes arc

protection and creates a hazardous condition.

WARNING: The maximum common-mode voltage (voltage between INPUT LO and the chassis

ground) is 5 00 V peak. Exceeding this value may cause a breakdown in insulation, creating a shock hazard.

2.6.4 Power-on Defaults

The multimeter uses the fact or y default settings for t he pow er-on settings.

All the procedures in this manual assume factory default settings, therefore reset the instrument to the factory settings when following the step-by-step procedures in later sections. Table 2-2 lists the factory default settings.

Setting Factory Default Autozero Buffer Continuity Beeper Digits Rate Threshold Current(AC and DC) Digits(AC) Digits(DC) Filter Count Mode Range Relative Value Rate(AC) Rate(DC) Diode test Digits Range Rate Frequency and Period Digits Range Relative Value Rate

Function GPIB Address Language Limits Beeper High limit Low limit mX+b Scale factor Offset Percent Reference

Overview

Table 2-2 Factory Default Settings

On No effect

On 4 1/2 Fast(0.1 PLC) 10 Ω

5 1/2 5 1/2 On 5 Moving average Auto Off

0.0 Medium(10PLC) Medium( 1 PLC)

5 1/2 1 mA Medium(1 PLC)

5 1/2 12 V Off

0.0 Slow(1 sec) DCV No effect 8 SCPI Off ON +1

-1 Off

1.0

0.0 Off

1.0

Table 2-2 Factory Default Settings (cont.)

Resistance(2-wire and 4-wire) Digits Filter Count

Mode Range Relative Value Rate RS-232(USB) Baud Triggers Continuous Delay Source Volta ge( AC and DC) dB reference dBm reference Digits(AC) Digits(DC) Filter Count

Mode Range Relative Value Rate(AC) Rate(DC)

Overview

5 1/2 On 5 Moving average Auto Off

0.0 Medium(1 PLC) On 9600

On Auto Immediate

No effect 75 Ω 5 1/2 5 1/2 On 5

Moving average Auto Off

0.0 Medium(10PLC) Medium( 1PLC)

2.6.5 Warm-up time

The 5492B is ready for use after power-up sequence (boot and self test) is completed. However, to achieve specified accuracy and stability, allow the instrument to warm up for half an hour. If the instrument has been subjected t o extreme temperat ures, allow add itiona l time for internal te mperature to stabilize

Basic Measurements

Chapter 3 Basic Measurements

This chapter is outlined as follows:

3.1 Overview

3.2 Measuring Vol tage

3.3 Measuring Current

3.4 Measuring Resistance

3.5 Measuring Frequency and Period

3.6 Measuring Continuity

3.7 Tes ting Di ode

3.8 Math Functions

3.1 Overview

The front panel has two rows of keys to select various functions and operations. Most keys have a shifted function printed in blue above the key. To perform a shifted function, press (the Shift

annunciator will turn on). Then, press the key that has the desired label above it. For example, to select the AC current function, press then press (AC I).

If you accidentally press , just press it again to tur n off the Shift annunciator.

3.2 Measuring Voltage

Voltage ranges: 120 mV, 1.2 V, 12 V, 120 V, 1000 V (750 VAC) Maximum resolution: 1 μV (on 120 mV range)

3.2.1 Connections

Assuming the multimeter is under factory default conditions, the basic procedure for measuring voltage is as follows:

1. Connect test leads to INPUT HI and LO ter m in als.

2. Select DC or AC voltage measurement by pressing or respectively.

3. Press to toggle between auto and manual ranging. Notice the AUTO annunciator is displayed with auto ranging. For manual range, use the RANGE and keys to select the appropriate range for meas urement.

4. Connect test leads to the sources as shown in Figure 3-1.

CAUTION: Do not apply more t han 1000 V peak to the input or it will damage the instrument.

5. If the “OVR.FLW” message is displayed, press the up key to select a higher range until a normal reading is displaye d (or press key for auto ranging). Use t he lowest poss ible range for

the best resolution. The measured reading is displayed.

Basic Measurements

DC Voltage Source

▲

DC V AC V 2W Fr eq

Aut o

Tr i

MX+ B

Shi f t

Cont Rel

¦¸

Period

dB/m

FastMenu Recall Med Slow Hold

CHOICES

LEVEL

ENTER

ESC

LOCAL

IDC IAC 4W

FAST MED SLOW

ADRS RMT HOLD TRIG

MEM AUTO

REL FILT MATH SHIFT

ERR

POWER

T2AL 250V

SENSE

！

10A

CATⅡ(300V)

CATⅠ(1000V)

350V

MAX

1000V

MAX

12A MAX

12A

INPUT

5492B

Digit Multimeter

1000V

MAX

AC Voltage Source

▲

DC V AC V 2W Fr eq

Aut o

Tr i

MX+ B

Shi f t

Cont Rel

¦¸

Period

dB/m

FastMenu Recall Med Slow Hold

CHOICES LEVEL ENTER

ESC

LOCAL

IDC IAC 4W

FAST MED SLOW

ADRS RMT HOLD TRIG

MEM AUTO REL FILT MATH SHIFT

ERR

POWER

T2AL 250V

SENSE

！

10A

350V

MAX

12A MAX

12A

INPUT

CATⅡ(300V)

CATⅠ(1000V)

5492B

Digit Multimeter

Input Resistance = 10 MΩ on 1000 V and 120 V ran ges;

> 10 GΩ on 12 V, 1.2 V and 120 mV ranges

CAUTION: Maximum Input = 1010 V peak

CAUTION: Maximum Input = 750 V RMS or 1000 V peak

Input Impedance = 1 MΩ,100 pF

Figure 3-1 DC and AC Voltage Measurement Connections

Basic Measurements

3.2.2 Crest factor

AC voltage and current accurac ies are affected by the crest factor of the waveform, the ratio of the pea k value to the RMS value. Table 3-1 lists the fundamental frequencies at which the corresponding crest factor must be taken into accou nt for accuracy calculations.

Table 3-1 Crest Factor Limitations

Crest Factor Fundamental Frequency

2 3 4-5

50 kHz 3 kHz 1 kHz

3.3 Measuring Current

Current ranges: 12 mA, 120 mA (DCI only, not available for ACI), 1.2 A, 12 A Maximum resolution: 100 nA (on 12 mA range)

Note: Auto range is only avail able f or 12 m A an d 120 mA ( DCI o nly ) ranges. For 1.2 A and 12 A range, manual range must be used.

3.3.1 Connections

Assuming the multimeter is under factory default conditions, the basic procedure for measuring current is as follows:

1. Connect test leads to INP UT LO and SENSE LO terminals

2. Select DCI or ACI measurement function by pressing → or → respectively.

3. Press to toggle between auto and manual ranging. Notice the AUTO annunciator is displayed with auto ranging. For manual range, use the RANGE and keys to select a measurement range consistent with expected curre nt.

Auto range is onl y av ai lable for 12 mA and 120 mA (DCI only) ranges. Manual range must be used for 1.2 A and 12 A ranges.

Therefore, it is recommended to use manual range when measuring current greater than 1 A with

1.2 A or 12 A range.

4. Connect test leads to the s ourc e as shown in Figure 3-2:

CAUTION: Do not apply more than 2 A between INPUT LO and SENSE LO terminals or the

protective fuse on the front panel will blow. Use the 10 A terminal for measuring current above 1 A. See Figure 3-2 for details.

5. If the “OVR.FLW” message is displayed, press up key to select a higher range until a normal reading is displayed (or press key for auto ranging). Use the lowest possible range for the

best resolution. Note that auto ranging is only av ailable for 12 mA and 120 mA (DCI only) ranges.

Basic Measurements

CATⅡ(300V)

CATⅠ(1000V)

1000V

MAX

Current Source

▲

DC V AC V 2W Freq

Aut o

Tr i

MX+ B

Shi f t

Cont Rel

¦¸

Period

dB/m

FastMenu Recall Med Slow Hold

CHOICES

LEVEL

ENTER

ESC

LOCAL

IDC IAC 4W

FAST MED SLOW

ADRS RMT HOLD TRIG

MEM AUTO REL FILT MATH SHIFT

ERR

POWER

T2AL 250V

SENSE

！

10A

CATⅡ(300V)

350V

MAX

12A MAX

12A

INPUT

5492B

Digit Multimeter

1000V

MAX

12A MAX

12A

Current Source

▲

DC V A C V 2W Fr eq

Aut o

Tr i

MX+ B

Shi f t

Cont Rel

¦¸

Period

dB/m

FastMenu Recall Med Slow Hold

CHOICES

LEVEL

ENTER

ESC

LOCAL

IDC IAC 4W

FAST MED SLOW

ADRS RMT HOLD TRIG

MEM AUTO

REL FILT MATH SHIFT

ERR

POWER

T2AL 250V

SENSE

！

10A

CATⅡ(300V)

CATⅠ(1000V)

350V

MAX

INPUT

5492B

Digit Multimeter

For low current measurement: INPUT LO and SEN SE LO terminals are used.

CAUTION: Maximum input = 1 A DC or RMS

For 1 A or higher current measurement: 10 A and INPUT LO terminals are used.

CAUTION: Maximum Input = 12 A DC or RMS

Note: Auto range is not available for 1.2 A and 12 A ran ges

Figure 3-2 DC and A C Current Measurements

3.3.2 Front Panel Fuse Replacement

WARNING: Make sure the instrument is disconnected from the power line and other equipment

before replacing the fus e.

1. Turn of f t he power and disconnect the power line and test leads.

2. From the front panel, use a screwdriver to rotate the fuse holder several turns counter-clockwise. Take the fuse carrier out of the socket.

3. Remove the fuse and replac e it w it h t he same type (T2AL, 250 V, 5×20mm)

CAUTION: Do not use a fuse with a higher current rating than specified or instrument damage

may occur. If the instrument repeatedly blows fuses, try to find out the reason before replacing the fus e.

Basic Measurements

To remove, use a flat head screw driver or a coin to insert into the slid and turn counter-clockwise to open. Similarly to put back the fuse box, push the box down and turn clockwise.

110

Fuse Box

3.4 Measuring Resistance

Resistance measurement r ange: 120 Ω, 1.2 kΩ, 12 kΩ, 120 kΩ, 1.2 MΩ, 12 MΩ, 120 MΩ Maximum resolution: 1 mΩ (on 120 Ω range)

3.4.1 Connections

Assuming the multimeter is under factory default conditions, the basic procedure for measuring resistance is as follows:

1. Connect test leads to the multimeter as follows:

A: For Ω2-wire, connect the test leads to INPUT HI and LO . B: For Ω4-wire, connect the test leads to INPUT HI and LO, and SENSE Ω 4W HI and LO. Kelvin

test probes are recommended for this setup.

2. Select Ω 2-wire or Ω 4-wire measurement function by pressing or → respectively.

3. Press to toggle between auto and manual ranging. Notice the AUTO annunciator is displayed with auto ranging. For manual range, use the RANGE and keys to select a measurement range.

4. Connect test leads to the r esist ance as shown in Figure 3-3:

CAUTION: Do not apply more than 1000 V peak between INPUT HI and LO or it will damage the

instrument

5. If the “OVR.FLW” message is di spla yed, press up key to select a higher range until a normal reading is displayed (or press key for auto ranging). Use the lowest possible range for the

best resolution.

6. The measured reading is displayed.

Basic Measurements

Shielded Coble

Optional Shield

Resistance Under Test

▲

DC V A C V 2W Fr eq

Aut o

Tr i

MX+ B

Shi f t

Cont Re l

¦¸

Period

dB/m

FastMenu Recall Med Slow Hold

CHOICES

LEVEL ENTER

ESC

LOCAL

IDC IAC 4W

FAST MED SLOW

ADRS RMT HOLD TRIG

MEM AUTO

REL FILT MATH SHIFT

ERR

POWER

T2AL 250V

SENSE

！

10A

CATⅡ(300V)

CATⅠ(1000V)

350V

MAX

1000V

MAX

12A MAX

12A

INPUT

5492B

Digit Multimeter

T2AL 250V

SENSE

！

10A

CATⅡ(300V)

CATⅠ(1000V)

350V

MAX

1000V

MAX

12A MAX

12A

INPUT

Shielded Coble

Optional Shield

Resistance Under Test

▲

DC V AC V 2W Fr eq

Aut o

Tr i

MX+ B

Shi f t

Cont Re l

¦¸

Period

dB/m

FastMenu Recall Med Slow Hold

CHOICES

LEVEL

ENTER ESC

LOCAL

IDC IAC 4W

FAST MED SLOW

ADRS RMT HOLD TRIG

MEM AUTO REL FILT MATH SHIFT

ERR

POWER

5492B

Digit Multimeter

Note: Source current flows from the INPUT HI to INPUT LO terminals

Figure 3-3 Two- and Four- wire Resistance Measurements

3.4.2 Shielding

To achieve a stable accurate reading, it helps to shield resistances greater than 100 kΩ. Place the resistance in a shielded enclosure and connect the shield to the INPUT LO terminal of the instrument electrically.

Basic Measurements

3.5 Measuring Frequenc y and Period

Frequency measure me nt r ange: 5 Hz to 1 MHz. Period measurement range: 0.2 s to 1 μs. Input signal range: 120 mV AC to 750 V AC RMS.

The instrument uses the volts input terminals (INPUT HI and INPUT LO) to measure frequency and period. The AC voltage range can be changed with the RANGE and keys. However, the signal voltage must be greater than 10% of the full-scale range.

Note: Auto ranging is not avail a bl e f or frequency and pe r iod measurement function.

3.5.1 Trigger Level and Measurement Errors

Frequency and Period apply a zero-crossing trigger, meaning that a count is taken when the signal crosses the zero level. The multimeter uses an interactive counting technique to measure frequency and period. This method generates constant measurement resolution for any input frequency. All frequency counters are subject to e rrors when measuring low voltage, low frequency signals. Both internal noise and external noise are also critical when measuring low voltage, low frequency signals. Measurement errors will also occur if you attempt to measure the frequency (or period) of an input following a dc offset voltage change. You must allow the multimeter’s DC input blocking capacitor to fully settle before making frequency measureme nt s.

3.5.2 Gate Time

Gate time is the amount of time the multimeter uses to sample frequency or period readings. For model 5492B, all RATE settings (Fast, Med and Slow) y ield a gate time of one second.

3.5.3 Connections

Assuming the multimeter is under factory default conditions, the basic procedure for measuring frequency or period is as follows:

1. Connect test leads to INP UT HI and LO terminals.

2. Select frequency or period measurement functions by pressing or → respectively.

3. Connect test leads to the sour ce as shown in Figure 3-4:

CAUTION: Do not exceed 1000 V peak between INPUT H I and INPUT LO or instrument damage

may occur.

4. The measured reading is displayed.

Basic Measurements

T2AL 250V

SENSE

！

10A

CATⅡ(300V)

CATⅠ(1000V)

350V

MAX

1000V

MAX

12A MAX

12A

INPUT

AC Voltage Source

▲

DC V A C V 2W Fr eq

Aut o

Tr i

MX+ B

Shi f t

Cont Re l

¦¸

Period

dB/m

FastMenu Recall Med Slow Hold

CHOICES

LEVEL ENTER

ESC

LOCAL

IDC IAC 4W

FAST MED SLOW

ADRS RMT HOLD TRIG

MEM AUTO

REL FILT MATH SHIFT

ERR

POWER

5492B

Digit Multimeter

Input Impedance = 1 MΩ in parallel with <100 pF

CAUTION: Maximum Input = 750 RMS, or 1000 V Peak

Figure 3-4 Frequency and Period Measurements

3.6 Measuring Continuity

The multimeter uses the 1 kΩ range to measure circuit continuity. A threshold resistance level (1 Ω to 1000 Ω) sh ould b e set. The factory default value is 10 Ω. The multimeter alerts you with a beep wh en a reading is below the set lev el.

Note: Continuity function defaults to FAST (0.1 PLC) rate and cannot be changed.

3.6.1 Connections

Assuming the multimeter is under factory default conditions, the basic procedure for continuity testing is as follows:

1. Connect test leads to the INPUT HI and LO terminals.

2. Select Continuity measurement function by pressing .

3. Connect test leads to the r esist ance under test as shown in Figure 3-5.

4. The measured reading is displayed.

Basic Measurements

T2AL 250V

SENSE

！

10A

CATⅡ(300V)

CATⅠ(1000V)

350V

MAX

1000V

MAX

12A MAX

12A

INPUT

Resistance Under Test

▲

DC V AC V 2W Freq

Aut o

Tr i

MX+ B

Shi f t

Cont Rel

¦¸

Period

dB/m

FastMenu Recall Med Slow Hold

CHOICES

LEVEL

ENTER

ESC

LOCAL

IDC IAC 4W

FAST MED SLOW

ADRS RMT HOLD TRIG

MEM AUTO

REL FILT MATH SHIFT

ERR

POWER

5492B

Digit Multimeter

Note: Source current flows from the INPUT HI to INPUT LO terminals.

Figure 3-5 Continuity Measurement

3.6.2 Threshold resistance level

You can define a threshold resista nce from 1 Ω to 1000 Ω. Factory default value is 10 Ω. Follow the steps below to define the resistance level:

1. Press for Continuity Measurement.

2. Press → to enter the submenu level, “1: CONTINUITY” will be displayed.

3. Press to enter the parameter level, the current LEVEL value will be displayed.

4. Use and keys to change the cursor position and use and keys to increment or decrement the digits respectively. Enter a value from 1 to 1000.

5. Press (ENTER) to confirm your setting. Message “CHANGE SAVED” will be displayed for a moment.

6. Press or → to exit the menu and return to the continuity measurement.

3.7 Testing Diode

The multimeter can also be used to measure the forward voltage drop of general-purpose diodes and the zener voltage of zener diodes. A current range (1 mA, 100 μA, or 10 μA) can be selected for diode measurement.

Note: Diode testing defaults to MED (1 P LC) rate and cannot be c hanged.

3.7.1 Connections

Assuming the multimeter is under factory default conditions, the basic procedure for diode testing is as follows:

1. Connect test leads to INP UT HI and LO terminals.

2. Press → for diode measurement function.

3. Connect test leads to the diode under test as shown in Figure 3-6.

4. Take a reading from the display.

Basic Measurements

T2AL 250V

SENSE

！

10A

CATⅡ(300V)

CATⅠ(1000V)

350V

MAX

1000V

MAX

12A MAX

12A

INPUT

Diode

▲

DC V AC V 2W Fr eq

Aut o

Tr i

MX+ B

Shi f t

Cont Re l

¦¸

Period

dB/m

FastMenu Recall Med Slow Hold

CHOICES

LEVEL

ENTER

ESC

LOCAL

IDC IAC 4W

FAST MED SLOW

ADRS RMT HOLD TRIG

MEM AUTO

REL FILT MATH SHIFT

ERR

POWER

5492B

Digit Multimeter

T2AL 250V

SENSE

！

10A

CATⅡ(300V)

CATⅠ(1000V)

350V

MAX

1000V

MAX

12A MAX

12A

INPUT

Zener diode

▲

DC V AC V 2W Fr eq

Aut o

Tr i

MX+ B

Shi f t

Cont Re l

¦¸

Period

dB/m

FastMenu Recall Med Slow Hold

CHOICES

LEVEL ENTER

ESC

LOCAL

IDC IAC 4W

FAST

MED SLOW

ADRS RMT HOLD TRIG

MEM AUTO

REL FILT MATH SHIFT

ERR

POWER

5492B

Digit Multimeter

Note: Source current flows from the INPUT HI to INPUT LO terminals

Figure 3-6 Diode Measurement

3.7.2 Current Range

You can set the test current range from the front panel. The choices are 1 mA, 100 μA, and 10 μA. The factory default current range is 1 mA. To set the test current, follow the steps below:

1. Press → for diode measurement function

2. Using and keys to scroll through the thr ee t est c ur rent selections.

The diode test function measures vol tage on the 3V range for the 1 mA test current and the 10 V range for the 100 μA and 10 μA ranges. If a reading is more than 10V, the multimeter will display the “OVR.FLW” message.

Basic Measurements

3.8 Math Functions

The multimeter math operat ions are divided into four categories:

 mX+b and percent  dB and dBm calculations  Statistics of buffered readings  Limit testing

The first two categories are discussed here in this section, while buffered reading statistics and reading limit testing are described in the next chapter, “Measurement Options”.

Notes: Once math is enabled for a function, the mX+b and percentage calculations will take

effect across funct i on changes.

3.8.1 mX+b

This math operation lets you manipulate normal display readings (X) mathematically according to the following calculation: Y = mX + b

Where: X is the nor m al ly display actual reading

m and b are user-entered constants for scale factor and offset respectively Y is the displayed result

To configure the mX+b calculation, perform the following steps:

1. Press for mX+b math operation and the pres ent scale factor M will be displayed:

M: +1.00000

2. Use the and keys to select the cursor position and use and keys to increment or decrement the selected digits respectively. When the cursor position se lect s “ ”, the up and down arrow keys can be used to move the decimal place left or r ight of its current position.

3. Press (ENTER) to confir m the M value and the message “CHANGE SAVED” will be displayed for a m om ent and then the present B value will be displayed. “m” is the default unit and represents milli (10

B: +0.00000 m

4. Enter a value using the arrow keys, similar to step 2 above.

5. Press (ENTER) to confirm the B v al ue, “CHANGE SAVED” will be displayed.

6. The multimeter then returns back to the main display and will now show the results of the mX+B calculation. The right of the display will show MXB.

If you want to change the M and B parameter values after enabling the math function at any time, you can also do the following:

1. Press → , “1: SET M” will be displayed (Submenu level).

2. Press key to enter the parameter level and the present scale factor M will be displayed:

3. Use the and keys to select the cursor position and u se and keys to

-3

M: +1.00000 .

Basic Measurements

increment or decrement the digits respectively. When the cursor p osition selects “ ”, the up and down arrow keys can be used t o m ove the decimal place left or right of its current position.

4. Press (ENTER) to confirm the M value and the message “CHANGE SA VED” will be displayed for a moment and then multimeter returns back to the submenu level. Press (ESC) to cancel

the M value input, and the multimeter will return back to the submenu level without changi ng the M value.

5. Press , “2: SET B” will be displayed (Submenu level).

6. Press key to enter the parameter level and the prese nt offset factor B will be displayed:

B: +00.0000 m.

7. Use the and keys to select the cursor position and use and keys to increment or decrement the digits respectively. Enter a value using the arrow keys.

8. Press (ENTER) to confirm the B value. The message “CHANGE SAVED” will be display ed for a moment and then the multimeter will return back to the submenu level. Press (ESC) to

cancel the B value input, and the multimeter will return back to the submenu level without changing the B value.

9. Press → to exit the menu operation and return bac k to t he mX+b calculated display.

3.8.2 Percent

When sel ecting the percent calculation function, a reference value must be specified. The displayed reading will be expressed as the percent deviation from the referen c e value. The percentage calculation is performed as follows:

Percent =

Where: Input is the normally display actual reading Reference is the user-entered constant Percent is the displayed result To configure the percent calculation, perform the following st eps:

1. Press → for percent math operation and the reference value will display as:

REF: +1.00000

2. Use the and keys to select the cursor position and u se and keys to

increment or decrement the digits respectively. When the cursor p osition selects “ ”, the up and down arrow keys can be used to m ove the decimal place left or right of its current position.

3. Press (ENTER) to confirm the reference value. The message “CHANGE SAVED” will be

displayed for a moment.

4. The multimeter will display the result of the percent calculatio n.

If you want to change the parameter values when the percent math function is enabled, you can also do the following:

1. Press → to enter the submenu level, “3: PERCENT” will be displayed.

2. Press to enter the parameter level, and the reference value will be d is played:

REF: +1.00000 .

3. Use the and keys to select the cursor position and u se and keys to

increment or decrement the digits. Enter a value. Whe n t he cursor position selects “ ”, the up and





× 100%

Basic Measurements

down arrow keys can be used t o m ove the decimal place left or right of its current position.

4. Press (ENTER) to confirm the reference value, “CHANGE SAVED” will be displayed for a

moment, and the multimeter will return to the submenu level. Press (ESC) to cancel the reference value input, and the multimeter will go back to the submenu level without changing the

reference value.

5. Press → key to exit the menu and return to the percent math oper ation. The multimeter will display measuremen t r esult of the percent calculation. If the value of “Input” is larger than that of “Reference”, displayed result will be positive. Contrarily, it will be negative if the value of “Input” is smaller than that of “Reference”.

3.8.3 dB Calculation

The 5492B can express AC and DC voltages in dB units. The relationship between dB and voltage is defined by the following equation:

dB = 20 log





Where: VIN is the DC or AC input signal

is the specified voltage refer ence level

REF

The instrument will read 0dB w hen t he reference voltage lev el is applied to the input.

If a relative value is in eff ect when dB is selected, this relative value will be converted to dB value before REL is applied. If REL is applied after dB function has been sel ected, dB reading will have REL applied to it directly.

To set the reference voltage, perfor m the fo ll ow ing steps:

1. Press + for dB math operation and the reference value is displayed:

REF: +0.00000

2. Use and keys to select cursor position and use and keys to increment

or decrement the digits respectively. Enter a value.

3. Press (ENTER) to confirm the reference voltage, and the message “CHANG E SAVED” will be

displayed for a moment. The multimeter will then return back to the measurement stat us .

4. Now the multimeter will display the r esult of the dB calculation.

If you want to change the para meter values when dB function is in effect, you can do the following:

1. Press → to enter the command level, “4: dB REF“ will be displayed.

2. Press to enter the parameter level, and the reference v alue will be displayed:

REF: +1.00000 .

3. Use and keys to select cursor position and use and keys to increment

or decrement the digits respectively. Enter a value a nd units prefix.

4. Press (ENTER) to confirm the reference value, the message “CHANGE SAVED” will be

displayed for a moment, and the multimeter will return to the submenu level. Press (ESC) to cancel the reference value input, and the multimeter will return back to the submenu level without

Basic Measurements

changing the reference v alue.

5. Press → key to exit the menu and r et ur n t o the dB math operation.

Notes: The dB calculation takes the absolute value of the ratio V

value of dB is -160 dB. This will accommodate a ratio of V

IN/VREF

= 1 µV, V

. The largest negative

= 1000 V.

REF

3.8.4 dBm Calculation

dBm is defined as decibels above or below a 1 mW reference. With a user-programmable reference impedance, B&K 5492B reads 0 dBm when the vol tage needed to dissipate 1mW through the reference impedance is applied. The relationship between dBm, reference impedance, and the voltage is defined by the following equation:

Where: V

If a relative value is in effect when dBm is selected, the relative value will be converted to dBm value before REL is applied. If REL is applied after dBm has been selected, dBm calculation will have REL applied to it directly.

To set the reference impedance, perform the following steps:

1. Press → , the voltage reference value for dB math function will be displayed.

2. Press (ENTER) to confirm the voltage reference value, now you have selected the dB math

function.

3. Press → again, and the impedance reference value for dBm math function will be

displayed:

REF: 0075 Ω

4. Use and keys to select cursor position and use and keys to increment

or decrement the digits respectively. Enter a value from 1 Ω to 9999 Ω.

5. Press (ENTER) to confirm the reference impedance, and the message “CHANGE SAVED”

will be displayed for a mome nt . The multimeter wil l then return back to the measur ement status.

6. Now the meter will display the result of the dBm calculation.

If you want to change the impedance reference value after the dBm function is enabled, you can also do the following:

1. Press → to enter the command level, “5: dB m REF” will be disp layed.

2. Press to enter the parameter level, and the current impedance reference value will be

displayed:

REF: +1.0000

3. Use and keys to select cursor position and use and keys to increment

or decrement the digits respectively. Enter a value from 1 Ω to 9999 Ω.

is the DC or AC input signal voltage value.

is the specified reference impedance.

REF

Basic Measurements

4. Press (ENTER) to confirm the reference value, and the message “CHANGE SAVED” will be

displayed for a moment, then the m ultimeter w ill return to t he submenu level. Press (ESC) to cancel the reference value input, and the multimeter will return back to the submenu level without

changing the reference v alue.

5. Press → key to exit the menu and return to the dB math operation.

NOTE: The reference impedance and input impedance mentioned in this chapter are

completely different. Input impedance is inherent in the instrument and cannot be changed via for egoing methods.

dBm is valid for both positive and negative DC voltage.

The mX+b and percent math operations are applied after the dBm or dB math calculations. For example, if mX+b is selected with m=10 and b=0, the display will read 10.000 MXB for a 1 VDC s ignal. If dBm is sele cted with (Z will read 130 MXB.

= 5 0 Ω), the display

REF

Measurement Options

Chapter 4 Measurement Options

This chapter is outlined as follows:

4.1 Measurement configuration

4.2 Trigger Operations

4.3 Buffer Operations

4.4 Limit Operations

4.5 System Operations

4.1 Measurement configuration

4.1.1 Range

You can let the multimeter automatically select the range using auto ranging or you can select a fixed range using manual ranging. Auto ranging is convenient because the multimeter automatically selects the appropriate range for each measurement. However, you can use manual ranging for faster measurements since the multimeter will not have to determine which range to use for each measurement. The digital multimeter returns back to auto ranging when power has been off or after a remote interface reset. Note that auto ranging is not available for some measurement functions and ranges.

Manual ranging

To select a range, simply p ress or key. The instrument changes one range per key press. The selected range is displayed momentari ly before showing the measured readings.

If the instrument displays the “OVR.FLW” message on a particular range, select a high er r ange until an in-range reading is disp layed. Use the lowest range possible without causing an overflow to ensure best accuracy and resolution.

Autoranging

To enable auto range, press key. The AUTO annunciator turns on when autoranging is selected. While selected, the instr ume nt aut omatically chooses the best range to measure t he applied signal.

Note that up-ranging occurs at 100% of the range, while down-rang ing occurs at 10 % of normal range.

To cancel auto range, press or or key. Pressing to cancel auto range will leave the instrument in its present range.

The key has no effect on the continuity and diode test functions.

Measurement Options

4.1.2 Filter

FILTER lets you set the filter response to stabilize noisy measurements. The multimeter uses a digi tal filter. The displayed, stored and transmitted readings are simply an average of a number of reading conversions (from 1 to 10 0) .

Perform the following steps to select a filter:

1. Press → to enter the menu on the menu le vel, “A: MEAS MENU” will be displayed.

2. Press to move down to the submenu level within the MEAS MENU, “1: CONTINUITY” will be

displayed.

3. Use or key to move across to the Filter option on the submenu level, “2: FILTER” will

be displayed.

4. Press to move down a level to the filter parameter choice.

5. Using or to turn ON or OFF the filter .

6. Press (ENTER) to con firm the selection. The message “CHANGE SAVED” will be displayed to

show that the change is now in effect. The multimeter automatically exits the parameter level and moves up a level to the submenu level.

7. Use to move across to the filter type option on the submenu level, “3: FILT TYPE” wi ll be

displayed.

8. Press to move down a level to the filter t ype parameter choice.

9. Use or to select MOVNG AV (Moving average) or REPEAT filter type.

10. Press (ENTER) to confirm the selection. The message “CHANGE SAVED” will be displayed to

show that the change is now in effect. The multimeter automatically exits the parameter level and moves up a level to the submenu level.

11. Use to move across to the filter count option on the submenu level, “4: FILT COUNT” wil l be

displayed.

12. Press to move down a level to edit the filter count parameter.

13. Use and keys to select cursor position and use and keys to increment or

decrement the digits respectively. Enter a filter count from 1 to 100.

14. Press (ENTER) to confirm the count v alue. The message “CHANGE SAVED” will be displayed

to show that the change is now in effect. The meter automatically exits the parameter level and moves up a level to the submenu level.

15. Press → key to exit from the menu and return t o the measurement status.

16. The FILT annunciator will disp la y when the filter function is ON.

NOTE: The filter cannot be set for frequency, period, continuity and diode test functions.

Filter Types

Moving Average (MOVNG AV)

The Moving average filter uses a first-in, first-out stack. When the stack becomes full, the measurement conversions are averaged, yielding a reading. For each subsequent conversion placed into the stack,

Measurement Options

the oldest conversion is dis car ded, and the stack is re-averaged, yielding a new r eading. See Figure 4-1 below.

Repeat Average (REPEAT)

For the repeating average filter, the stack is filled and the conversions are averaged to yield a reading. The stack is then cleared and t he pr ocess starts over as shown in Figure 4-1.

Figure 4-1 Moving averag e and repeating average filters

Response Time

The filter parameters have speed and accuracy tradeoffs for the time needed to display, store, or output a filtered reading.

4.1.3 Relative

The relative operation can be used to null offsets or subtract a baseline reading from present and future readings. When relative f unction is enabled, the multimeter uses the present r eading as a relative value. Subsequent readings wi ll be t he difference between the actual input value and the relative value.

You can define a relative value for each function. Onc e a relative value is set f or a measur ement funct ion, the value is the same for all ranges. For example, if 2 V is set as a relative value on the 12 V range, the relative is also 2 V on the 1000 V, 120 V, 1.2 V or 120 mV ranges.

Additionally, when you perform a zero correction for DCV, Ω2 or Ω4 measurements by enab ling REL, the

Measurement Options

displayed offset becomes the reference value. Subtracting the offset from the actual input, the display will be as follows:

Displayed reading = Actual Input – Reference

Selecting a range that ca n not acco mmodate the relative value does not cause an overflow con diti on, but it also does not increase the maximum allowable input for that range. For example: on the 1.2 V ran ge, the meter still overflows fo r a 1. 4 V input.

To set a REL value, press when the display shows the value you want as the relative value. The REL annunc i at or will display. To disable REL, Press again.

You can also input a REL value manually using the mX+b functi on. Set M for 1 and B for any value you want. Please refer to Chapter 3 for details about mX+ b function.

4.1.4 Rate

The RATE operation sets the integration time of the A/D converter, the period of time the input signal is measured. The integration time affects the usable digits, the amount of reading noi se, as well as the reading rate of the instrument. The integration time is specified in parameters based on a number of power line cycles (NPLC), w her e 1 PLC for 50 Hz is 20 msec.

In general, the fastest integration time (FAST (0.1 PLC) set from the f ront panel or remote interface) results in increased reading noise and fewer usable digits, while the slowest integration time (10 PLC) provides the best common-mode and normal-mode rejection. In-between settings are a compromise between speed and noise.

The RATE parameters are explained as follows: Fast FAST sets integration time to 0.1 PLC. Use FAST if speed is of primary importance, however it is at the expense of increased rea din g noise and fewer usable digits. Medium Medium sets integration time to 1 PLC. Use Medium when a compromise between noise performance and speed is acceptable. Slow Slow sets integration tim e to 10 PLC. S LO W provides bett er noise p erformanc e at the exp ense of spe ed.

For the AC functions (ACV, ACI), Rate setting determines the bandwidth setting as below:

Fast 500 Hz~100 kHz Medium 50 Hz~100 kHz

Slow 5 Hz~100 kHz

Note: The integration time can be set for any measurement function except frequency, period,

continuity (FAST) and diode test (ME Dium ). For fr equen cy and per iod, it is the equivalent of the gate time, 1 sec.

Measurement Options

count

≠

Trigger

≠

count

sample

MAN

BUS

IMMediate

Trigger source

Initiate Triggering

INITiate

READ?

MEASure?

sample

Measurement

Delay

Wait for Trigger

Idle state

4.2 Trigger Operations

The multimeter’s triggering system allows you to generate triggers either manually, automatically, or externally for taking multiple readings per trigger. The following discusses front panel triggering, programmable trigger del ay, and the reading hold feature.

4.2.1 Trigger Model

The flowchart below (Figure 4-2) summarizes the triggering process of the instrument .

Idle

The instrument is considered to be in the idle state whenever it is not performing any measurement.

Wait for Trigger

The control source holds up operation until the programmable event occurs and is detected. See description below for tr igg er sources:

Figure 4-2 Trigger model

 Immediate

With this trigger source, e vent detection happens immediately.

 External

Event detection happens when either of the following t akes place:

Measurement Options

1. A bus tr igger (*TRG) command is r eceived via remot e cont r ol.

2. The front panel key is pressed (The meter must be in local mode first).

Trigger Source

The trigger source can be set from the front panel trigger menu. Users can select either IMM, MAN, BUS, or EXT. Description of each are as follows:

IMM: Immediate. Event detection happens immediately and will continue making

measurement continuous l y.

MAN: Manual. Even detection happens when the front panel key is pressed. (The unit must already be in local m ode f irst).

BUS: Event detection happens with a bus tr igger (*TRG) com mand is receiv ed v ia remote contr ol. EXT: Event detection happens when an external trigger signal is sent to the EXT TRIG input

terminal in the rear panel of t he i nst r ument.

To set or change the trigger source, do the following:

1. Press → to enter the menu on the menu level, “A: MEAS MENU” w ill be displayed.

2. Use or key to move across to the TRIG MENU on the menu level, “C: TRIG MENU” will

be displayed.

3. Press to move down to the command level within the TR IG MENU, “1: T RIG MODE” will be

displayed.

4. Press to move down a level to select the trigger source.

5. Use or to select IMM, MAN, BUS, or EXT trigger source.

6. Press (ENTER) to con firm the selection. The message “CHA NGE SAVED” will be disp layed to

show that the change is now in effect. The meter will then exit the parameter level and move up a level to the command level.

7. Press → key to exit from the me nu and return to the measure m ent display.

Delay

A programmable delay is available after event detection. It can be set manually or automatically. With Auto delay, the meter selects a delay based on the function and range. The AUTO delay settings are listed in Table 4-1 below.

Measurement Options

Table 4-1 Aut o delay settings

Function Range and Delay

DCV

120mV 1ms 120mV

ACV

FREQ

DCI

ACI

Ω2W, Ω4W

Continuity

400ms 120mV

1ms 12mA 2ms 12mA 400ms 120Ω 3ms

1mA

Diode testing

To set the delay manually, follow the below steps:

8. Press → to enter the menu on the menu level, “A: MEAS MENU” w ill be displayed.

9. Use or key to move across to the TRIG MENU on the menu level, “C: TRIG MENU” will

be displayed.

10. Press to move down to the command level within the TRIG MENU, “1: TRIG MODE” will be

displayed.

11. Use to m ove across to the TRIG DELAY command on the command level , “2: TRIG DELAY”

will be displayed.

12. Press to move down a level to set the type of delay mode.

13. Using or to select AUTO or MANU (Manual) delay mode.

14. Press (ENTER) to confirm the choice. The message “CHANGE SAVED” will be displayed to

show that the change is now in effect. If AUTO mode is selected, the multimeter will exit the parameter level and move up a level to the command level.

15. If MANU mode is selected, a delay ti me will need t o be spe cified. The screen will display like below

to show the current manu al tr igger delay value:

DELAY: 0000mS

16. Use and keys to choose a numerical place and use and keys to increm ent

or decrement the digits. E nt er a value for delay time (0 to 6000 ms).

17. Press (ENTER) to confirm the delay time. The message “CHANGE SAVED” will be displayed

to show that the change is now in effect. The multimeter will automaticall y exit the parameter level and move up a level to the command lev el.

18. Press → key to exit from the menu and return to the me asur ement display.

Note: Changing the trigger delay to MANU (Manual) on any function changes the same for all

other functions.

1.2V 1ms

1.2V 400ms

1.2V 1ms 120mA 2ms

1.2kΩ 3ms 1kΩ 3ms

1ms

12V 1ms 12V 400ms

12V 1ms

1.2A 2ms

1.2A 400ms 12kΩ 13ms

100uA 1ms

120V 5ms 120V 400ms

120V 1ms 12A 2ms 12A 400ms 120kΩ 25ms

10uA

1ms

1000V 5ms 750V 400ms

750V 1ms

1.2MΩ 100ms

12MΩ 150ms

120MΩ 250ms

Measurement Options

5 V

0 V

Iutput

Ext Trig

1μs

5 V

0 V

Output

VM Comp

Approximately

Input

4.2.2 EXT Trig & VM Comp

The rear panel of the instrument has two BNC terminals: Ext Trig and VM Comp. This section describes the functiona lity of these two terminals.

Ext Trig

This is the external trigger input terminal. When trigger mode is set to EXT, this terminal can be used as the source for triggering a measurement. Input a negative pulse into this terminal to trigger the instrument. The pulse width must be greater than 1 μs. An example is illustrated in Figure 4-3 below.

Figure 4-3 Trigger model

VM Comp

This is the voltmeter complete output terminal. When the instrument completes its present measurement, a voltmeter complete output signal will output from this terminal as shown in Figure 4-4 below.

Figure 4-4 Trigger model

4.3 Buffer Operations

The 5492B has an internal buffer to store 2 to 512 readings. In addition, the buffer includes statistical information based on the stored readings such as the minimum reading, maximum reading, average based on the stored readings, and standard deviation of the stored readings Buffer Statistics” for details).

The buffer fills up with the requested number of readings and then stops. Readings are then placed into the buffer and can be read back via front panel or remote operation. Buffered data is overwritten each time the reading store function is turned enabled (ON) and initiated. The data is volatile; it is not

(See section “4.3.3

Measurement Options

saved through a power cycle.

Note: Readings will not include the function (i.e. VDC, VAC, Frequency, etc.) or the unit of measurement (i.e. V, A, Hz, Ω, etc.) selected prior to storing into the buffer.

4.3.1 Store Reading

Select a measurement function and any math operations first, then connect the test leads to the signal under test. Setup the reading speed (FAST, MED, SLOW), then use the following procedure to store readings:

1. Press → to enter the menu on the menu level, “A: MEAS MENU” will be displayed.

2. Use or key to move across to the SYS MENU on the menu level, “D: SYS MENU” will

be displayed.

3. Press to move down to the command level within the SYS MENU, “1: RDGS STORE” will be

displayed.

4. Press to move down a level to set RDGS STORE function.

5. Use or key to set reading store function t o O N or O FF.

6. Press (ENTER) to confirm the ON/OFF selection. The message “CHANGE SAVED” will be

displayed to show that the change is now in effect. The meter will automatically exit the parameter level and move up a level to the com m and level.

7. At this time, a “*” annunciator will light up on the display (This may not light up if the number of

readings to store has not been specified or if it is 000. Continue to the next step to set this up). This indicates that the i nstrument is ready to store readings into the buffer. If the user decides to turn it off at this moment, do not exit t he menu syst em. Instead, follow step 5-7 again, with reading store function set to OFF in step 6.

8. Use to move across to the RDGS COUNT command on the command level, “2: RDGS

COUNT” will be displayed.

9. Press to move down a level to edit the number of readings to store into buffer.

10. Use and keys to choose a numerical place and use and keys to increment

or decrement the digits. E nt er a number between 2 to 512.

11. Press (ENTER) to confirm the number of readings to store. The message “CHANGE SAVED”

will be displayed to show that the change is now in effect. The multimeter will exit the parameter level and move up a level to the com m and level.

12. If you did not see a “*” indicator on display in st ep 7, y ou will se e it now after th e nu mber of read in gs

for RDGS COUNT parameter has been set to a number (2 to 512).

13. Press → key to exit from the menu, and readings will immediately start storing into

the buffer.

14. Notice the “*” annunciator is still lid. At this point, it will stay lid until the specified number of

readings are stored into the buffer. During this time, do not push any keys to interrupt the instrument from storing readings into the buffer.

Note: When the instrument completes the storage of readings into the buffer, the reading store function (1: RDGS ST O RE) parameter within the system menu will autom at i cal ly set back to OFF . To store readings again, go into the system menu an d set t his parameter back to ON.

Measurement Options

1.234 m:005

512.

Warning: Readings insi de t he buffer are volatile. Therefore do not power off the instrument or data will be lost. Additionally, each time the store reading function is enabled and initialized, previously stored data in the buffer will be overwritten.

4.3.2 Recall Readings

Use the following steps to recall the store d readings and the ir statistica l inform ation (minim um, max imum, average, and standard deviation):

1. Press → to enter the menu on the menu level, “A: MEAS MENU” w il l be dis pl ayed.

2. Use or k ey to move across to the SYS MENU on the menu level, “D: SYS MENU” will

be displayed.

3. Press to move down to the command level within the SYS MENU, “1: RDGS STORE” will be

displayed.

4. Use or k ey to move across to the SAVED RDGS command, “3: SAVED RDGS” will be

displayed.

5. Press to move down a level to view the stored readings. “MEM” annunciator will turn on to

indicate the instrument accessi ng buffer memory. If no readings are stored, a “BUFFER EMPTY” message will be display ed for a few seconds.

6. Use or key to navigate through the readings. The display may look like any of the

following when browsing through all the stored readings:

Reading: Stored reading value Unit Prefix: The unit prefix that applies

-3

), u

Reading

Unit

Prefix

Reading # or type of statistical information

to the Reading. This can be m (10

-6

(10

), n (10-9), or blank.

Reading # or type of statistical information: Indicates the reading # or

count that corresponds to the Reading. This can be any number from 001 – Additionally, this can display the type of statistical information in which the Reading corresponds with. This can be MAX, MIN, AVG, or STD (See section “

4.3.3 Buffer Statistics” for details).

7. Use the function keys or press → to exit from the menu and return to measurement

mode.

Measurement Options

4.3.3 Buffer Statistics

In addition to measured readings that can be stored into the internal buffer, four other statistical information of the stored r eadings are also kept ins ide the buffer. They are: MAX, MIN, AVG, STD.

MAX and MIN

The MAX and MIN refer to the maximum and minimum value of the readings stored in the buffer respectively.

For example, suppose the buffer contains the following five readings: 1.234, 2.345, 3.456, 4.567, 5.678. MAX = 5.678 MIN = 1.234

AVR

AVR stands for average. The AVR value is the mean(average) of the buffered readings. The equation used to calculate this is:











=

Where: 

is a stored reading



 is the number of stored readings

For example, suppose the buffer contains the following five readings: 1.234, 2.345, 3.456, 4.567, 5.678. AVG = 3.456

STD

The STD value is the standard deviation of the buffered readings. The equation used to calculate the standard deviation is:













󰇢



Where: 

is a stored reading



=





















󰇡



1

 is the number of stored readings

4.4 Limit Operations

Limit operations set and control the values that determine the HI / IN / LO status of subsequent measurements. Limits can be applied to all measurement functions except continuity. The limit test is performed after mX+b and percent math operations. Unit prefixes are applied before the limit test, for example:

Low Limit = -1.0, High Li mit = 1.0 A 150 m V reading becomes 0.15V (IN).

Low Limit = -1.0, High Li mit = 1.0

Measurement Options

A 0.6kΩ reading becomes 600Ω (HI). When the reading is within the configured limit range specified by low and high limits, “IN” will be shown after measured display. If it is higher than the limit range, “HI” will be shown a fter the measure d display. Similarly, if it is lower than the limit rang e, “LO” w ill be shown. You can configure the multimeter to beep or not when readings are out side of the limit range.

4.4.1 Enabling limits

Use the following procedure to turn on the limit operation:

1. Press → to enter the menu on the menu level, “A: MEAS MENU” w il l be dis pl ayed.

2. Use or k ey to move across to the MATH MENU on the menu level, “B: MATH ME NU”

will be displayed.

3. Press to move down to the command level within the MATH MENU, “1: SET M” will be

displayed.

4. Use or key to move across to the LIMIT TEST command, “6: LIMIT TEST” will be

displayed.

5. Press to move down a level to set LIMIT TEST function to ON.

6. Press (ENTER) to confirm the set of LIMIT TEST function. The message “CHANGE SAVED”

will be displayed to show that t he change is now in effect.

7. Press → key to exit from the menu.

8. When the multimeter returns to the measurement display, the HI/IN/LO status will be displayed

along with the reading. If the reading is within the range specified by the high and low limits

(configured in the next s ection), it will show “IN”. If higher than the range, it will show “HI” . If lower

than the range, it will show “ LO ” .

4.4.2 Setting Limit Values

Follow the below steps to con fig ur e high and low limits for li m it oper at i on:

1. Press → to enter the menu on the menu level, “A: MEAS MENU” will be displayed.

2. Use or k ey to move across to the MATH MENU on the menu level, “B: MATH ME NU”

will be displayed.

3. Press to move down to the command level within the MATH MENU, “1: SET M” will be

displayed.

4. Use or key to move across to the HIGH LIMIT command, “7: HIGH LIMIT” will be

displayed.

5. Press to move down a level to input the high limit value. The current high limit value will be

displayed:

HI: +1.00000

6. Use and keys to choose a numerical place and use and keys to increment

or decrement the digits. E nt er a high limit value.

7. Press (ENTER) to confirm the value of high limit. The message “CHANGE SAVED” will be

displayed to show that the change is now in effect.

Measurement Options

8. Use or key to move across to the LOW LIMIT command, “8: LOW LIMIT” will be

displayed.

9. Press to move down a level to input the low limit value. The current l ow limit value will be

displayed:

LO: -1.00000

10. Use and keys to choose a numerical place and use and keys to increment

or decrement the digits. E nt er a low lim it value.

11. Press (ENTER) to confirm the value of low limit. The message “CHANGE SAVED” will be

displayed to show that the change is now in effect.

12. Press → key to exit from the menu.

4.4.3 Configure Limit Beep

Users can configure the multimeter to make a beep sound upon specifi ed conditions when using limit operation. Follow the below steps to configure:

1. Press → to enter the menu on the menu level, “A: MEAS MENU” wil l be displayed.

2. Use or key to move across to the MATH MENU on the menu level, “B: MATH MENU” will be displayed.

3. Press to move down to the command level within the MATH MENU, “1: SET M” will be displayed.

4. Use or key to move across to the LIMIT BEEP command, “9: LIMIT BEEP” will be displayed.

5. Press to move down a level to select the condition in which the meter shoul d make a beep sound when using limit operation. The display should show “ALARM:” with the current selection blinking.

6. Use and keys to choose between one of the following:

NEVER: Never beep regardless of the limit status (HI, LO, IN). HI: Beep only when the reading is HI (Reading is above the high limit). IN: Beep only when the reading is within the range s pec i f ied by high and low limits. LO: Beep only when the reading is LO (Reading is bel ow t he low l imit). OUT: Beep only when the reading is HI or LO.

7. Press (ENTER) to confirm the value of high limit. The message “CHANGE SAVED” will be displayed to show that the change is now in effect.

4.5 System Operations

There are some system settings that can be configured on the 5492B multimeter, which include beeper control, saving and restoring instrument settings, front panel display control, key sound control, self-test, and calibration. The following sections will describ e in details each of these settings.

Measurement Options

4.5.1 Beeper Control

Under default settings, the multimeter will emit a beep tone whenever certain conditions are met. This beep can be disabled by the user.  When you disable the beeper, the multimeter will not emit a tone when:

1. A limit is exceeded in a limit test

 Disabling the beeper has no effect on the tone generated when:

1. An internal error is generated.

2. The continuity threshold is exc eeded.

3. A front panel key is pressed (This is controlled by KEY SOUND CONTROL setting).

 The beeper state is stored in non-volatile memory and does not c hange w h en pow er has bee n off or

after a reset.

Use the following steps to change the beeper’s state:

1. Press → to enter the menu on the menu level, “A: MEAS MENU” w il l be dis pl ayed.

2. Use or k ey to move across to the SYS MENU on the menu level, “D: SYS MENU” will be displayed.

3. Press to move down to the command level within the SYS MENU, “1: RDG S S TORE” will be displayed.

4. Use or key to move across to the BEEP command, “4: BEEP” will be displayed.

5. Press to move down a level to set the beeper control.

6. Use or key to select ON or OFF.

7. Press (ENTER) to confirm the beeper control. The message “CHANGE SAVED” will be displayed to show that the change is now in effect.

8. Press → key to exit from the menu.

4.5.2 Save Settings

The 5492B allows user to save up to 10 instrument settings. These settings are saved as files in non-volatile memory (10 files: FILE-0 – FILE-9). Files will not be lost when the instrument is powered off. These settings can be restored at any time after power on. The settings that can be stored in each file are the same settings listed under the default settings. Refer to section “2.6.4 Power-on Defaults” for details.

To save settings, first setup the instrument with the settings you want to save. Then, fo llow the steps below:

1. Press → to enter the menu on the menu level, “A: MEAS MENU” w il l be dis pl ayed.

2. Use or key to move across to the SYS MENU on the menu level, “D: SYS MENU” will be displayed.

3. Press to move down to the command level within the SYS MENU, “1: RDGS STORE” will be displayed.

4. Use or key to move across to the SAVE CNFG command, “5: SAVE CNFG” will be displayed.

Measurement Options

5. Press to move down a level to select a file to save.

6. Use or key to select a file from FILE-0 to FILE-9.

7. Press (ENTER) to save the present setting to the selected file. The message “FILE SAVING” will display when saving is in progress. Once completed, “SAVE SUCCEED” will be displayed.

8. Press → key to exit from the menu.

4.5.3 Restore Settings

To recall previously saved settings (stored in FILE-0 to FILE-9), or to restore factory default settings, follow the below steps:

1. Press → to enter the menu on the menu level, “A: MEAS MENU” w il l be dis pl ayed.

2. Use or k ey to move across to the SYS MENU on the menu level, “D: SYS MENU” will be displayed.

3. Press to move down to the command level within the SYS MENU, “1: RDGS STORE” will be displayed.

4. Use or key to move across to the LOAD C NFG command , “6: LOAD CNFG” wil l be displayed.

5. Press to move down a level to select a file to restore.

6. Use or key to select “FACT” to restore factory default settings. To restore user saved settings, select one of the “FILE-#” locat i ons t hat contain the settings you want to restore (FILE-0 to FILE-9).

7. Press (ENTER) to restore the selected setting. The message “FILE LOADING” and “LOAD SUCCEED” will be displayed.

8. Press → key to exit from the menu.

4.5.4 Display Control

To speed up measurement rate for remote control, the 5492B allows the user to turn off the front panel display.

When the front panel display is t urned off, readings are not sent to the display. Some annunciators will still stay lid . Front panel operation is unaffected by tur ning off the display. The display will be enabled again after a power on/ off or after a remote interface reset.

To control the display settings, foll ow t he below steps:

1. Press → to enter the menu on the menu level, “A: MEA S MENU” will be displayed.

2. Use or key to move across to the SYS MENU on the menu level, “D: SYS MENU” will be displayed.

3. Press to move down to the command level within the SYS MENU, “1: RDGS STORE” will be displayed.

4. Use or key to move across to the DISPLAY command, “7: DISPLAY” will be displayed.

5. Press to move down a level to set the display control.

Measurement Options

6. Use or key to select ON or OFF for the front panel display.

7. Press (ENTER) to confirm the selection. The message “CHANGE SAVED” will be displayed to show that the change is now in effect.

8. Press → key to exit from the menu.

4.5.5 Key Sound

The multimeter by default is shipp ed with be ep so un d enab led w hen keys are presse d. This can be set to ON or OFF by the user.

Follow the steps below to set t he k ey sound settings:

1. Press → to enter the menu on the menu level, “A: MEAS MENU” w il l be dis pl ayed.

2. Use or k ey to move across to the SYS MENU on the menu level, “D: SYS MENU” will be displayed.

3. Press to move down to the command level within the SYS MENU, “1: RDGS STORE” will be displayed.

4. Use or key to move across to the KEY SOUND command, “8: KEY SOUND” will be displayed.

5. Press to move dow n a level to enable or disable the key sound.

6. Use or key to turn ON or turn OFF the key sound.

7. Press (ENTER) to confirm the selection. The message “CHANGE SAVED” wil l b e dis played to show that the change is now in effect.

8. Press → key to exit from the menu.

4.5.6 Self-test

The multimeter has a built-in self-test routine that is processed during an initial power up of the instrument. Additionally, two other self-test routines can be run from the front panel. To do t his, follow the below steps:

1. Press → to enter the menu on the menu level, “A: MEAS MENU” w il l be dis pl ayed.

2. Use or key to move across to the SYS MENU on the menu level , “D: SYS MENU” will be displayed.

3. Press to move down to the command level within the SYS MENU, “1: RDGS ST ORE” will be displayed.

4. Use or key to move across to the KEY SOUND command, “9: TEST” will be displayed.

5. Press to move down a level to select the self-test to run.

6. Use or key to select “KEY” (tests the keys) or “BUILT-IN” self-test.

7. Press (ENTER) to confirm the selection. If “KEY” is selected, it will initially display a message “NO KEY PRESS”. At this point, pressing any keys will display the key’s function. For example, pressing will display “LEFT PRESS” message. To exit the key self-test. Press button. After it displays “SHIFT PRESS”

Measurement Options

message, it will return to the par ameter level for selecting self-test. If “BUILT-IN” is selected, the unit will run an internal self-test. This will take approximately 10-15 seconds. Af ter completion, the message “TEST PAS S” will display if no errors occur during the self-test.

8. Press → key to exit from the menu.

4.5.7 Calibration

B&K Precision recomm ends a calibration period of once a year .

Note: To prevent corruption of the calibration data stored in non-volatile memory of the

instrument, only authorized service center or qualified individuals may proceed with calibrating the instrument.

Please contact B&K Precision for information about instr ument calibration.

Remote Operation

Chapter 5 Remote Operation

This chapter is outlined as follows:

5.1 Selecting an Interface

5.2 USB & RS-232 Interface Operation

5.3 GPIB Interface operation

5.4 Data Format

The 5492B supports remote control over the USB (virtual com), RS-232, and GPIB interface located in the rear panel. You can use only one interface at a time. Standard Commands for Programmable Instruments (SCPI) is supported by these interfaces (unless otherwise noted), however they use different hardware configurations and communication protoco ls.

5.1 Selecting an Interface

The 5492B supports the follow ing interfaces for remot e c ommunication:

 USB (virtual COM) device interface  RS-232 interface  GPIB bus interface (optional) (model 5492 BGPIB)

You can only use one interface at a time for remote communication. USB & RS232 interfaces are selected as the default factory setting. You can select the interface from the front panel menu system. The interface selection i s stored in non-volatile memory and does not change from a power on/off or instrument reset.

5.1.1 USB (Virtual COM) Interface

The USB device interface on this instrument is a USB virt ual COM. After installing the appropr iate USB drivers, the instrument w ill be recogn ized and ass ign ed to a COM port aut o matica lly by the PC as if it’s a RS-232 serial interface. A side from instal ling drivers, the setup and operation is the same as RS-232 serial interface, which is d escr ibed in details in the following sections.

Installing USB Driver To install the USB driver, visit The drivers are managed and updated by a third-party, so check B&K Precision’s websi te for the latest version.

www.bkprecision.com and go to the product page to download the driver.

BK Precision 5492B Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1.1 Feature Overview

1.2 Input Power and Fuse Requirements

1.3 Package Contents

2.1 Front Panel Overview

2.2 Screen Display

2.3 Front Panel Menu Options

2.4 Front Panel Men u Overvie w

2.6 Power up

2.6.1 Power Line Connection

2.6.2 Power-up Sequence

2.6.3 High Energy Circuit Safety Precautions

2.6.4 Power-on Defaults

2.6.5 Warm-up time

3.1 Overview

3.2 Measuring Vol tage

3.2.1 Connections

3.2.2 Crest factor

3.3 Measuring Current

3.3.1 Connections

3.3.2 Front Panel Fuse Replacement

3.4 Measuring Resistance

3.4.1 Connections

3.4.2 Shielding

3.5 Measuring Frequenc y and Period

3.5.1 Trigger Level and Measurement Errors

3.5.2 Gate Time

3.5.3 Connections

3.6 Measuring Continuity

3.6.1 Connections

3.6.2 Threshold resistance level

3.7 Testing Diode

3.7.1 Connections

3.7.2 Current Range

3.8 Math Functions

3.8.1 mX+b

3.8.2 Percent

3.8.3 dB Calculation

3.8.4 dBm Calculation

4.1 Measurement configuration

4.1.1 Range

4.1.2 Filter

4.1.3 Relative

4.1.4 Rate

4.2 Trigger Operations

4.2.1 Trigger Model

4.2.2 EXT Trig & VM Comp

4.3 Buffer Operations

4.3.1 Store Reading

4.3.2 Recall Readings

4.3.3 Buffer Statistics

4.4 Limit Operations

4.4.1 Enabling limits

4.4.2 Setting Limit Values

4.4.3 Configure Limit Beep

4.5 System Operations

4.5.1 Beeper Control

4.5.2 Save Settings

4.5.3 Restore Settings

4.5.4 Display Control

4.5.5 Key Sound

4.5.6 Self-test

4.5.7 Calibration

5.1 Selecting an Interface

5.1.1 USB (Virtual COM) Interface