HP E1312A/E1412A User’s Manual and SCPI Programming Guide
Edition
HP E1312A and HP E1412A Multimeter Module Setup
General Information
Checking the Line Frequency Reference
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Multimeter Command Reference (continued)
:AVERage:AVERage
:AVERage:COUNt
:AVERage:MAXimum
:AVERage:MINimum
[:IMMediate]
:IMPedance:AUTO
:IMPedance:AUTO
:CURRent:AC
:CURRent[:DC]
Multimeter Command Reference (continued)
[SENSe:] (continued)
FREQuency:VOLTage:RANGe:AUTO
FREQuency:VOLTage:RANGe:AUTO
PERiod:VOLTage:RANGe:AUTO
VOLTage[:DC]:RESolution
ZERO:AUTO
ZERO:AUTO
:PRESet
:QUEStionable:CONDition
Appendix B
Appendix C
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Certification
HEWLETT-PACKARDWARRANTY STATEMENT
U.S. Government Restricted Rights
Documentation History
Trademarks
Safety Symbols
WARNINGS
HP E1312A Declaration of Conformity
according to ISO/IEC Guide 22 and EN
Manufacturer’s Name:
Manufacturer’s Address:
Product Name:
HP E1412A Declaration of Conformity
July 31
Reader Comment Sheet
In appreciation of your time, we will enter you in a quarterly drawing for a
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HP E1312A and HP E1412A Multimeter Module Setup
Note
+50
+60
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Multimeter Functional Connections
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Programming the
Multimeter
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HP E1312A/E1412A Multimeter Application Information
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The following program shows SCPI examples used to store a NULL value
30 HP E1312A/E1412A Multimeter Application Information
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sinewave inputs only
Common Crest Factors
Example
For low frequencies where (f × Rs) ≤ 15(106)Ω ∙ Hz: :
15(10
Hz:
-100 × Rs
Error (%) = R----s---+-----1M--------Ω
Voltage Measured = Vin2+ Noise2
fast filter
seconds, and is useful for frequencies above 200Hz. The
medium filter
slow filter
DC Blocking Circuitry
function
This applies to all measurement functions
Table 2-6.Resolution of Power Line Cycles
DC voltage ratio measurements use both the
•Set the resolution using the following commands:
38 HP E1312A/E1412A Multimeter Application Information
Integration time applies to dc voltage, dc current, resistance and
Except for
NPLCs are not applicable to the
•Set integration time using the following commands:
s are not applicable for the
zero reading
When autozero is disabled
Use the following command to disable autozero or select the
ONCE
[SENSe:]ZERO:AUTO OFF|ONCE|ON
1.Select the desired math function:
2.Enable the selected math function by turning the calculate state on:
Result = reading - null value
•Does not apply to the DC-to-DCRatio measurements
The null value is adjustable and you can set it to any value between 0 and
Two Ways to Store the NULL Offset Value
Storing the dB
Reference Value
Storing the dBm
Reference Resistance
Value
•Applies to all measurement functions
•You can set the upper and lower limits to any value between 0 and
Use the following commands to activate the
The
44 HP E1312A/E1412A Multimeter Application Information
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source
through
HP E1300/E1301A B-SizeMainframes)
For example, the following program statement selects the external trigger
BNC connector as the trigger source
Checking the Trigger Source
The Wait-for-TriggerState
The multimeter is triggered from the VXIbus. This mode is selected with the
command
You can also trigger the multimeter from the
Substituting MIN for the number parameter sets the trigger count to
Example: Setting the Trigger Count
Example: Inserting a Trigger Delay
command returns one of the following numbers to the output buffer:
The present trigger count (1 through 50,000) if neither
•The minimum trigger count available (1) if MIN is specified
NOTE:
Example: Setting the Sample Count
The present trigger delay (1
•The minimum trigger delay available (1μs) if MIN is specified
•The maximum trigger delay available (3600 seconds) if MAX is specified
10 readings are taken, the multimeter returns to the idle state
plug&play
C Programs
Project Type:
QuickWin application (.EXE)
Project Files:
Hardware Used
MEASure Command
1.Use the MEASure command to make a single measurement
2.Make several externally triggered measurements
3.Maximize measurement speed on multiple measurements
Measurement Format
•Readings sent to the output buffer can consist of two different lengths
(bytes or characters) in Real ASCII format:
Each measurement is terminated with a Line Feed
by commas and EOI is sent only with the last byte. For example:
Trigger source
•The sample count (SAMP:COUN) is set for 10 samples per trigger
30 measurements; 10 samples for each of three triggers
MEASURE3 Source Code File
The autozero function is disabled to speed up the measurement process. See the
MEASURE4 Source Code File
Maximizing Accuracy (most accurate resolution, longer integration time)
•The sample count (SAMP:COUN) is set for 10 samples per external trigger
This example uses the
56 HP E1312A/E1412A Multimeter Application Information
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HP E1412A SCAN Source Code File
SCPI command sequences for the program are as follows
**** Set up the Multimeter
**** Now set up the switch module
Retrieve the readings from the multimeter
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SYNCHOPC Source Code File
Loop
SPOLL - read the multimeter’s status byte until bit 5 (ESB) goes high. End Loop
SYNCHMAV Source Code File
NOTE: If
62 HP E1312A/E1412A Multimeter Application Information
LIMITTST Source Code File
Enter response into the computer
Wait 1 second
End Loop
Device Configuration
Visual Engineering Environment
HP VEE
Select
I/O
Program Description
Strip Chart Object
In parallel with the
object is a
object that displays the readings of the eight channels. The
HP VEE Visual Engineering Environment
HP VEE The Most Productive Language for Test and Measurement
HP VEE Visual Engineering Environment Technical Data
Multimeter Command Reference
Command
A colon (:) always separates one command from the next lower level command as
Separator
shown below:
Abbreviated Commands
Parameters
Parameter Types
Optional Parameters
Table 3-1.DC Voltage Resolution versus Integration Time or Aperture Time
Table 3-2.DC Current Resolution versus Integration Time or Aperture Time
Table 3-4.AC Voltage: Range versus Resolution
Table 3-5.AC Current: Range versus Resolution
command subsystem removes the multimeter from the
wait-for-trigger
state and places it in the idle state
is only effective when the trigger source is
Subsystem Syntax
Valid Math/Measurement Function Combinations
CALCulate:AVERage:AVERage
reads the average of all readings taken since
was enabled
commands). The average value is cleared when
CALCulate:AVERage:COUNt
stores a relative value in the dB Relative Register
You can set the relative value to any number between
200dBm (the
values). The dB reference is stored in volatile memory
Example Set the DB Reference Value
Parameter Summary
selects the math function to be used. One function is enabled at a time with
the default. The selected function
MUST
be enabled with
Example Set the Lower Limit
queries the lower limit
Example Query the Lower Limit Set for the LIMit Math Operation
Example Set the Upper Limit
queries the upper limit
stores a null value in the multimeter’s Null Register
You can set the null value to any number between 0 and
120% of the highest range, for the present function
–120%
of the highest range
The wrong line frequency setting will cause reading errors to occur
:STRing <quoted string
cal_value
Example Query the Number of Occurrences of Point Calibrations
Comments •
Example Query the Line Frequency Setting
new code
Example Enter a New Calibration Security Code
code
command. The state is stored in
<code
•*RST does not change the state
Example Set the Calibration State to Unsecured
Example Enter Calibration Information to Record the Next Calibration Date
CALibration:STRing
Example Query the Calibration Message
CALibration:VALue
cal_value
mode
Example Calibrate the Active Function and Range Using the CAL:VALue
does not
esolution
The CONFigure command RANGe and RESolution parameters are optional. You
RESolution
Default Settings for CONFigure Command by Function
CONFigure:CURRent:AC [<range>|MIN|MAX|DEF|AUTO
resolution
<range
<resolution
resolution|
CONFigure:CURRent[:DC] [<range>|MIN|MAX|DEF|AUTO
>|MIN|MAX|DEF]]
resolution |
For range: MIN = 10 mA; MAX = 3A
e.g
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CONFigure:FRESistance [<range>|MIN|MAX|DEF|AUTO
For range: MIN = 100 Ω; MAX =100MΩ
To specify a
resolution while autoranging, you must specify the
parameter;
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CONFigure:RESistance [<range>|MIN|MAX|DEF|AUTO
resolution |MIN|MAX|DEF
For range: MIN = 100Ω; MAX =100MΩ
•To specify a MIN or MAX resolution while autoranging, you must specify
for range;
CONFigure:VOLTage:AC [<range>|MIN|MAX|DEF|AUTO
•The MIN and MAX parameters select the minimum or maximum values for range:
For range: MIN = 0.1V; MAX
Example Making AC Voltage Measurements
CONFigure[:VOLTage[:DC]] [<range>|MIN|MAX|DEF|AUTO
For range: MIN = 100mV; MAX
Example Making DC Voltage Measurements
94 Multimeter Command Reference
dc signal voltage
Hi and LO input
Sense HI and LO input
It returns a quoted string to the output buffer in the following format:
“<function> <parameter>,<parameter>”
If you specify
•Related Commands: CONFigure, MEASure
Example Querying the Multimeter Configuration
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The FETCh? command retrieves measurements stored in the module’s internal
This command is most commonly used with CONFigure
without error
• The Multimeter’s internal memory stores 512 readings maximum
Example Transferring Stored Readings to Output Buffer
This command is most commonly used with CONFigure. See the section titled
subsystem to control the behavior of the trigger system
•To transfer readings from memory to the output buffer, use the FETCh? command
•*RST Condition: *RST places the multimeter in the idle state
Example Placing Multimeter in Wait-For-TriggerState
Conditions:
Example Query the Input Impedance Mode
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Example Making DC Voltage Ratio Measurements
complete signal to the VXIbus TTL trigger lines
voltmeter complete
The multimeter generates the
The VXIbus trigger lines are
More than one TTL output trigger line can be enabled at one time
Example Route Voltmeter Complete to Trigger Line
voltmeter complete
Example Query Voltmeter Complete Destination
The READ? command is most commonly used with CONFigure to:
Place the multimeter in the
Comments
Each reading sent to the output buffer is terminated with a Line Feed
Example Transfer Readings Directly to Output Buffer
number
•*RST Condition: SAMP:COUN
Example Set the Sample Count
Example Query the Sample Count
--Function, Range and Resolution
--Aperture Time and Number of Power Line Cycles
--Bandwidth
--Autozero
116 Multimeter Command Reference
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function
Change Measurement Function
Example Query the Measurement Function
Example Query the AC Current Measurement Range
enables or disables the autorange
function for AC current measurements
When autoranging is
If you explicitly select a range using
Example Disable AC Current Autoranging
selects the resolution for AC
current measurements. See Table 3-5on page
resolution|MIN|MAX
•Specify resolution in the same units as the measurement function
•If autoranging is required, set the resolution using the MIN or MAX parameter
1.66667 seconds (60Hz) or 2 seconds (50Hz)
seconds (60Hz) or
(50Hz)
Example Set an Aperture Time of 16.7ms
returns one of the following numbers to the output buffer
•The CURR:DC:NPLC command overrides the results of previously executed
•*RST Condition: 10 PLC
10 PLC
Example Set the DC Current Integration Time in PLCs
•The present integration time in PLCs if MINimum or MAXimum is not specified
•You must select a range using CURRent:DC:RANGe before specifying resolution
Example Set the DC Current Range to 3A
The minimum current range available (10mA) if MIN is specified
Example Query the DC Current Measurement Range
function for DC current measurements
Example Disable DC Current Autoranging
Example Query the DC Current Autorange Mode
selects the resolution for DC current measurements
Changing the resolution also changes the
The present current resolution selected if
•The minimum current resolution available (1μA) if MIN is specified
•The maximum current resolution available (100μA) if MAX is specified
Condition
Example Set the ac Signal Filter for Fast Measurements From 200Hz to 300kHz
Example Query the Detector Bandwidth
<time
•MIN = 0.01, MAX
•*RST Condition: 0.1 seconds
0.1 seconds
selects the voltage range for the
signal level of frequency measurements
•The FREQ:VOLT:RANG command overrides the range setting from a previous
y command
Example Set the Voltage Range for Frequency Measurements to
enables or disables the
autorange function for the signal level of frequency measurements
Example Disable Autoranging
returns a number to show whether the autorange mode is enabled or disabled: “
. The number is sent to the output buffer
Comments • MIN sets the aperture time to 0.333ms. MAX sets the aperture time to
The minimum aperture time available (.333ms) if MIN is specified
The maximum aperture time available (1.67s @ 60Hz; 2s @ 50Hz) if
[SENSe:]FRESistance:NPLCycles
•The FRES:NPLC command overrides the results of previously executed
commands (the last command executed has priority)
Example Set the Integration Time in PLCs
[SENSe:]FRESistance:NPLC? [MIN|MAX]
•You must select a range using FRESistance:RANGe before specifying resolution
•*RST Condition: FRES:RANG 1kΩ (1E+03)
(1E+03)
Example Set Four-WireResistance Range to 10MΩ
•The present resistance range selected if MIN or MAX is not specified
function for 4-wireresistance measurements
Example Put 4-wireResistance Measurements in the Autorange Mode
selects the resolution for
4-wire
resistance measurements
•*RST Condition: FRES:RES 1mΩ (1E-03)
(1E-03)
time
1 second
•*RST Condition: 0.1 (100ms)
0.1 (100ms)
Example Set the Aperture Time
[SENSe:]PERiod:VOLTage:RANGe <range> selects the voltage range for the
signal level of period measurements
Example Set the Voltage Range for Period Measurements to
0.1, 1, 10, 100 or 300 corresponding to the range set
MIN returns
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•The RES:APER command overrides the results of previously executed
[SENSe:]RESistance:NPLCycles
•The RES:NPLC command overrides the results of a previously executed
command (the last command executed has priority)
[SENSe:]RESistance:NPLC? [MIN|MAX]
The minimum integration time available (0.02) if MIN is specified
•*RST Condition: RES:RANG 1kΩ
Example Change the Range
•The present resistance range selected if MIN or MAX is not specified. Only the
function for resistance measurements
•*RST Condition: Based on the *RST values for the RESistance:NPLC command
Example Change the Resolution
•You must select a range using VOLTage:AC:RANGe before specifying resolution
•Specifying a fixed range disables the autorange mode setting
The minimum voltage range available with the
The maximum voltage range available with the
[SENSe:]VOLTage:AC:RANGe:AUTO <mode> enables or disables the autorange
function for AC voltage measurements
In order to specify an aperture time of
s, you must select a fixed range (e.g
Example Disable AC Voltage Autoranging
selects the resolution for AC voltage measurements. See Table
on page
to avoid a settings conflict error when specifying resolution
•The VOLT:AC:RES command overrides the resolution setting from a previous
*RST Condition: 1E-04
The maximum aperture time available (1.67s @ 60Hz; 2 s @ 50Hz) if
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•You must select a range using VOLTage:DC:RANGe before specifying resolution
•Specifying a fixed range disables the autorange mode by setting
[SENSe:]VOLTage[:DC]:RANGe:AUTO <mode> enables or disables the autorange
function for DC voltage measurements
[SENSe:]VOLTage[:DC]:RANGe:AUTO
150 Multimeter Command Reference
selects the resolution for DC voltage measurements
•The VOLT:DC:RES command overrides the resolution setting from a previous
•*RST Condition: Based on the *RST values for the VOLTage:NPLC command
•*RST Condition: ZERO:AUTO ON (enables autozero mode)
Example Disable Autozero
•“ 0” ( OFF or ONCE) if autozero is disabled or set for one time
•“ 1” ON if autozero is enabled
Example Query the Autozero Mode
The STATus subsystem reports the bit values of the Questionable Data/Signal
Event Register and to read the summary bits from the Status Byte Register
event register and an enable register. The commands in the STATus:QUEStionable
subsystem control and monitor these registers
The STATus system contains seven registers, four of which are under IEEE
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The SYSTem command subsystem returns error numbers and their associated
instrument complies
One error is removed from the error queue each time the
When the error queue is empty, subsequent
Example Reading the Error Queue
•*RST Condition: TRIG:COUN
Example Set the Trigger Count
Example Query the Trigger Count
seconds
NOTE: This delay also occurs between each sample when
Example Set the Trigger Delay
Example Query the Trigger Delay
Example Disable Automatic Trigger Delay
TRIGger:DELay:AUTO
Example Query the Trigger Delay Mode
Disable automatic trigger delay
TRIG:DEL:AUTO
source
•Related Commands: INITiate, READ?, MEAS
Example Set the Sample Source
Example Query the Trigger Source
unmask
162 Multimeter Command Reference
Executable when Initiated: Yes
Coupled Command: No
Related Commands: STATus:PRESet
*RST Condition: none
Comments • Executable when Initiated: Yes
Power-OnCondition: register is cleared
Related Commands: *OPC?, *WAI
Related Commands: *OPC, *WAI
*RST does not affect:
•Power-OnCondition: no bits are enabled
Example Enable Service Request on Message Available Bit
Related Commands: *SRE
Comments • Executable when Initiated: No
•*RST Condition: none
The following tables summarize SCPI commands for the HP E1312A B-sizeand
HP E1412A C-size 6½-DigitMultimeters
Description
168 Multimeter Command Reference
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170 Multimeter Command Reference
HP E1312A and HP E1412A Multimeter Specifications
Accuracy Specifications ± (% of reading + % of range) [1]
Appendix A
HP E1312A and HP E1412A Multimeter Specifications
Measuring Characteristics
DC Voltage
Resistance
DC Current
DC:DC Ratio
Operating Characteristics [8]
System Speeds [10]
Additional Error with Autozero OFF
Settling Considerations
Measurement Considerations
[1]
174 HP E1312A and HP E1412A Multimeter Specifications
Measurement Noise Rejection [7]
True RMS AC Voltage
True RMS AC Current
Operating Characteristics
System Speeds [10], [11]
[10], [11]
Function or Range Change:
5/sec
Accuracy Specifications ±(% of reading) [1] [4]
Additional Low-FrequencyErrors (% of reading) [4]
Integration Time (number PLCs)
Frequency
100 &
Operating Characteristics [5]
System Speeds [5]
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Understanding the “% of reading” Error
Understanding the “% of range” Error
Total Measurement Error
Total Measurement Error
Number of Digits and Overrange
Sensitivity
Resolution
Accuracy
Transfer Accuracy
24-HourAccuracy
90-Dayand 1-YearAccuracy
Temperature Coefficients
DC Voltage, DC Current, and Resistance Measurements:
AC Voltage and AC Current Measurements:
Frequency and Period Measurements:
HP E1312A and HP E1412A Multimeter Error Messages
-112 Program mnemonic too long
string contains more than the maximum 12 characters allowed in the
-113 Undefined header
-121 Invalid character in number
-123 Numeric overflow
-160to -168 Block data errors
The multimeter does not accept block data
-170to -178 Expression errors
The multimeter does not accept mathematical expressions
-211 Trigger ignored
-330 Self-testfailed
-350 Too many errors
Query
-440 Query UNTERMINATED after indefinite response
501Isolator UART framing error
532Cannot achieve requested resolution
540Cannot use overload as math reference
HP E1312A and HP E1412A Service Manual
602RAM read/write failed
603A/D sync stuck
621AC rms full scale failed
622Frequency counter failed
623Cannot calibrate precharge
625I/O processor does not respond
626I/O processor failed self-test
709No cal for this function or range
710Full scale correction out of range
720Cal DCV offset out of range
721Cal DCI offset out of range
722Cal RES offset out of range
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Measurement Speed and Accuracy Trade-offs
Special Commands and Their Equivalent [SENSe:] Command
194 Measurement Speed and Accuracy Trade-offs
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Setting the Resolution
INIT;:FETCH
The aperture time or NPLC is set as a result of specifying the
resolution
> parameter in the
Numerics
range, 87, 119– 120 range/resolution, 87, 102 resolution
A(continued)
C(continued)
autozero
Current (continued)
Current
ac (continued) range/resolution, resolution, 121 specifications, 174–
specifications
autozero, 83, 152, 197 math function
F(continued)
NPLC, 123, 132, 140
querying, 122– 123, 131– 132, 136, 139– 140, 147–
setting, 122– 123, 131– 132, 136, 139– 140, 147–
configuration (continued)
dBm, 43, 75 dc current
error, 180–
See
P(continued)
Power Line
cycles, 27, 38, 123, 132, 140
cycles
noise, rejecting voltages
R(continued)
errors
S(continued)
4-wireohms, 90, 105, 133– 134 ac current, 87
delays, 49– 50, 157– 159 upper/lower limits, 44
T(continued)
dc, 25– 28 offset
