Contents
Frequency and Period Measurement Errors
Zeroauto ZEROAUTO?
IMMediate
Chapter Multimeter Command Reference
Appendix a
Appendix B
Contents
HEWLETT-PACKARD Warranty Statement
Documentation History
Manufacturer’s Name
July 31 Jim White, QA Manager
Business Reply Mail
Page
Using This Chapter
HP E1312A and HP E1412A Multimeter Module Setup
Setting the Module Address Switch
Interrupt Priority
Setting the Line Frequency Reference
Checking the Line Frequency Reference
Page
Multimeter Functional Connections
Switch Module Analog Bus Connections
Voltage Measurement Connections
Wire Ohms Measurement Connections
Initial Operation
HP E1312A and HP E1412A Multimeter Module Setup Chapter
Function Prototype
HP E1312A and HP E1412A Multimeter Module Setup Chapter
Measurement Tutorial
Thermal EMF Errors
DC Voltage Measurements
Thermoelectric Voltages
Loading Errors dc volts Leakage Current Errors
Common Mode Rejection CMR
Rejecting Power Line Noise Voltages
Noise Caused by Ground Loops
Noise Caused by Magnetic Loops
Resistance Measurements
Wire Ohms Measurements
Set to 2-wire ohms function
Errors in High Resistance Measurements
Power Dissipation Effects
Making High-Speed DC and Resistance Measurements
True RMS AC Measurements
DC Current Measurement Errors
Common Crest Factors Example
Crest Factor Errors non-sinusoidal inputs
Temperature Coefficient Errors
Loading Errors ac volts
AC Measurements Below Full Scale
Function and Range Change Internal Offset Correction
Voltage Measured = Vin2+ Noise2
Low-Level Measurement Errors
Frequency and Period Measurement Errors
AC Current Measurement Errors
Making High-Speed AC Voltage or Current Measurements
AC Signal Filter DC Input Resistance
Measurement Configuration
Number of Power Line Cycles Nplc Resolution
Chapter HP E1312A/E1412A Multimeter Application Information
SENSeZEROAUTO Offonceon
Null Relative Function
Math Operations CALCulate Subsystem
CONFfunction
DB Measurements
Storing the dB Reference Value
DBm Measurements
Storing the dBm Reference Resistance Value
HP E1312A/E1412A Multimeter Application Information Chapter
Triggering the Multimeter
TRIGgerSOURce EXTernal
Checking the Trigger Source
Wait-for-Trigger State
Bus Triggering
Example Setting the Trigger Count
Checking the Trigger Count Inserting a Trigger Delay
Example Inserting a Trigger Delay
Default Trigger Delays
Example Setting the Sample Count
Querying Delay Time Sample Count
Checking the Sample Count
HP VTL Software Visa
HP E1312A and HP E1412A Multimeter Application Examples
Making Multimeter Measurements
MEASure Command
MEASURE2 Source Code File
MEASURE1 Source Code File
Init
MEASURE3 Source Code File
MEASURE4 Source Code File
HP E1412A Multimeter and Switch Module Synchronization
Synchronizing Multimeter With a Switch Module
See -5 for the HP E1312A/E1412A Multimeter status system
Now set up the switch module
Set up the Multimeter
Check the multimeter for system errors
Retrieve the readings from the multimeter
Multimeter Status System Examples
RST CLS *ESE Init OPC
Synchopc Source Code File
RST Init FETC?
Synchmav Source Code File
Limittst Source Code File
End Loop Check the multimeter for system errors
Loop
Programming Example
Device Configuration
Page
HP E1312A/E1412A Multimeter Application Information Chapter
Common Command Format
Command Types
Command Format
Abbreviated Commands Implied Commands
Command
Separator
Parameters
Linking Commands
PLC
Multimeter Range and Resolution Tables
AC Voltage Range versus Resolution
Scpi Command Reference
AC Current Range versus Resolution
ABORt
Related Commands INITiate, TRIGger
Aborting a Measurement
Subsystem Syntax
CALCulate
Valid Math/Measurement Function Combinations
AVERageCOUNt?
AVERageAVERage?
AVERageMAXimum?
AVERageMINimum?
DBREFerence?
DBREFerence
DBMREFerence
DBMREFerence?
FUNCtion?
FUNCtion
Parameter Summary Example
Example Query the Calculate Math Function
LIMitLOWer?
LIMitLOWer
LIMitUPPer
LIMitUPPer?
NULLOFFSet?
NULLOFFSet
STATe
STATe?
COUNt?
CALibration
LFRequency
Comments
LFRequency?
Example Query the Line Frequency Setting
SECureCODE
Example Enter a New Calibration Security Code
SECureSTATe?
SECureSTATe
STRing
Example Set the Calibration State to Unsecured
VALue
STRing?
VALue?
Example Query the Calibration Message
Zeroauto
CAL?
CALibration?
Command Setting
CONFigure
Function Range Resolution
Default Settings for CONFigure Command by Function
Example Making AC Current Measurements
CURRentAC
Example Making DC Current Measurements
CURRentDC
ResolutionMINMAXDEF selects the frequency function
FRESistance
Example Making 4-Wire Ohms Measurements
PERiod
Example Making 2-Wire Ohms Measurements
Resolution Minmaxdef
Example Making AC Voltage Measurements
VOLTageAC
Example Making DC Voltage Measurements
VOLTageDC
Sense HI and LO input
VOLTageDCRATio
String Returned
CONFigure?
POINts?
Data
Example Transferring Stored Readings to Output Buffer
FETCh?
IMMediate
INITiate
Example Placing Multimeter in Wait-For-Trigger State
INPut
Example Query the Input Impedance Mode
IMPedanceAUTO
IMPedanceAUTO?
MEASure
MEASCURRAC? 1,MAX
CURRentAC?
MEASCURRDC? .1,MAX
CURRentDC?
FREQuency?
MEASFRES? 1500,MAX
FRESistance?
PERiod?
RESistance?
VOLTageAC?
VOLTageDC?
Example Making DC Voltage Ratio Measurements
VOLTageDCRATio?
TTLTrgSTATe
OUTPut
RST Condition OUTPTTLTn OFF
Example Route Voltmeter Complete to Trigger Line
TTLTrgSTATe?
Example Query Voltmeter Complete Destination
Example Transfer Readings Directly to Output Buffer
READ?
COUNt
SAMPle
RST Condition Sampcoun Example Set the Sample Count
SAMPCOUN?
Example Query the Sample Count
SENSe
Zero Auto Offonceon AUTO?
Function
Example Query the Measurement Function
CURRentACRANGe?
CURRentACRANGe
Example Query the AC Current Measurement Range
Example Query the AC Current Autorange Mode
Example Disable AC Current Autoranging
CURRentACRANGeAUTO
CURRentACRANGeAUTO?
CURRentACRESolution?
CURRentACRESolution
CURRentDCAPERture?
CURRentDCAPERture
Example Set an Aperture Time of 16.7ms
Example Query the Aperture Time
CURRentDCNPLC?
CURRentDCNPLC
Example Query the DC Current Integration Time
CURRentDCRANGe?
CURRentDCRANGe
Example Set the DC Current Range to 3A
Example Query the DC Current Measurement Range
Example Query the DC Current Autorange Mode
Example Disable DC Current Autoranging
CURRentDCRANGeAUTO
CURRentDCRANGeAUTO?
CURRentDCRESolution?
CURRentDCRESolution
DETectorBANDwidth
FREQuencyAPERture
DETectorBANDwidth?
FREQuencyAPERture?
Example Query the Detector Bandwidth
FREQuencyVOLTageRANGe?
FREQuencyVOLTageRANGe
Example Set the Voltage Range for Frequency Measurements to
Example Query the Measurement Range
Example Query the Autorange Mode
Example Disable Autoranging
FREQuencyVOLTageRANGeAUTO
FREQuencyVOLTageRANGeAUTO?
FRESistanceAPERture?
FRESistanceAPERture
FRESistanceNPLC?
FRESistanceNPLC
Example Query the Integration Time
FRESistanceRANGe?
FRESistanceRANGe
FRESistanceRANGeAUTO?
FRESistanceRANGeAUTO
FRESistanceRESolution?
FRESistanceRESolution
Example Query the Resolution
RST Condition Fresres 1mΩ 1E-03
PERiodAPERture?
PERiodAPERture
RST Condition 0.1 100ms Example Set the Aperture Time
PERiodVOLTageRANGe?
PERiodVOLTageRANGe
Example Set the Voltage Range for Period Measurements to
Example Query the Period Voltage Range
PERiodVOLTageRANGeAUTO?
PERiodVOLTageRANGeAUTO
RESistanceAPERture?
RESistanceAPERture
RESistanceNPLC?
RESistanceNPLC
RESistanceRANGe?
RESistanceRANGe
RST Condition Resrang 1kΩ Example Change the Range
RESistanceRANGeAUTO?
RESistanceRANGeAUTO
RESistanceRESolution?
RESistanceRESolution
Example Change the Resolution
VOLTageACRANGe?
VOLTageACRANGe
VOLTageACRANGeAUTO
Example Disable AC Voltage Autoranging
VOLTageACRANGeAUTO?
VOLTageACRESolution?
VOLTageACRESolution
RST Condition 1E-04 Example Change the Resolution
VOLTageDCAPERture?
VOLTageDCAPERture
VOLTageDCNPLC?
VOLTageDCNPLC
VOLTageDCRANGe?
VOLTageDCRANGe
VOLTageDCRANGeAUTO?
VOLTageDCRANGeAUTO
VOLTageDCRESolution?
VOLTageDCRESolution
Example Query the Autozero Mode
Example Disable Autozero
QUEStionableENABle
PRESet
STATus
QUEStionableCONDition?
QUEStionableEVENt?
QUEStionableENABle?
Example Reading the Error Queue
ERRor?
SYSTem
VERSion?
RST Condition Trigcoun Example Set the Trigger Count
TRIGger
Example Set the Trigger Delay
DELay
Example Query the Trigger Count
DELayAUTO
DELay?
Example Query the Trigger Delay
Example Disable Automatic Trigger Delay
Example Query the Trigger Delay Mode
DELayAUTO?
SOURce
Related Commands INITiate, READ?, MEAS?
Example Set the Sample Source
Example Query the Trigger Source
SOURce?
Category Command Title Description
Ieee 488.2 Common Command Quick Reference
ESE and *ESE?
Example Enable All Error Events
ESR?
RST does not affect
SRE and *SRE?
STB?
HP E1412A C-size 6½-Digit Multimeters
Scpi Command Quick Reference
Data
67sMINMAX
Zeroauto Offonceon
DC Characteristics
HP E1312A and HP E1412A Multimeter Specifications
60 Hz 50 Hz
Measuring Characteristics
Operating Characteristics
True RMS AC
AC Characteristics
True RMS AC Voltage
System Speeds 10
Accuracy Specifications ±% of reading 1
Frequency and Period Characteristics
Configuration Rates 14/sec Autorange Time
General Specifications
Understanding the % of reading Error
To Calculate Total Measurement Error
Total Measurement Error
Number of Digits and Overrange
Interpreting Multimeter Specifications
Accuracy
DC Voltage, DC Current, and Resistance Measurements
Configuring for High Accuracy Measurements
Execution Errors
113Undefined header
112Program mnemonic too long
121Invalid character in number
123Numeric overflow
To -178Expression errors
To -168Block data errors
221Settings conflict
211Trigger ignored
330Self-test failed
350Too many errors
440Query Unterminated after indefinite response
Cannot use overload as math reference
Cannot achieve requested resolution
Cal signal frequency out of range
Cal signal measurement out of range
Cal secured
Invalid secure code
No cal for this function or range
HP E1312A and HP E1412A Multimeter Error Messages Appendix B
Measurement Speed and Accuracy Trade-offs
Measurement Speed and Accuracy Trade-offs Appendix C
HP E1312A/E1412 Special Function
General Guidelines for Increasing Measurement Speed
Minimize Number Command Response Sessions
Avoid Function Changes Avoid Aperture Changes
Decrease Aperture Time or NPLCs
Set Autozero to Once or OFF Turn Autorange
INITFETCH?
Setting the Resolution
Index
197
Index
124
Index
Index
Error, 180
See online help
Cycles, 27, 38, 123, 132, 140
Errors
130
Setting resolution, 15, 38
160
Index