UNI-T UTR2810E Desktop LCR Digital Bridge User Manual

Command Structure

UTR2810E command divide into two types: common command and SCPI command. Common command is defined by IEEE standard definition, which apply to all instruments. SCPI command adopted three layers tree structure, the top layer is subsystem command. The lower commands of the subsystem command are valid only when the subsystem command is selected. Colon is used to separate the top and low command.

Basic rule of tree command structure

• Ignore case sensitive

example
LIMIT:NOMINAL = limit:nominal = LiMiT:NoMiNaL blank ( presents one blank) cannot lie in before or after a colon. example WrongLIMIT:NOMINAL
RightLIMIT:NOMINAL
Command can be word abbreviation or fully spelled words .
Example
LIMIT:NOMINAL = LIM:NOM
The query command constitutes by question mark (?) after the command
Example
LIMIT: NOMINAL_C?
Semicolon ( ; ) is used to separate multiple commands in one set of command, rule of multiple commands as follows
On a multiple command line, use a semicolon (;) to separate multiple commands of the same level under the same subsystem command.
Example
LIMIT:NOMINAL ; BIN ,
Colon ( ; ) separator with colon presents the latter command will restart from the top of tree command.
Example
LIMIT:NOMINAL ;:LIMIT:BIN ,

Contraction Rule of Command

Each command and characteristic parameters have two spell formats at least, abbreviation and full spell. Sometimes the two format are totally the same. Follow these rules for abbreviations,

• If the word length are four letter or short of four letter, the abbreviation and full spelled format is the same.
• If the word length are longer than four letter and the fourth letter is vowel, then the abbreviation format should be the former three letter.
  If the fourth letter is consonant, then the abbreviation format should be the former four letter

Example,
LIMIT can be abbreviate to LIM
RANGE can be abbreviate to RANG
FREQUENCY can be abbreviate to FREQ

• If the abbreviation is not a word but a phrase, the full spelling is the first letter of the word plus the full spelling of the last word. On the basis of the full format, the abbreviation can be obtained by using the above rules.
  Example:
  The full spell of Source RESistor is SRESISTORaccording to abbreviation rule, the short form is SRES.

Command Title and Parameter

UTR2810E control command contains command title and the related parameter. Command title can be full spelling or abbreviation format. Full spelling is easy to understand the command meaning; abbreviation format is to improving computer input efficiency. The parameter can be either of the following forms,
Character data and character string data
Character data constituted by ASCII character. Abbreviation rule is the same as command title. Character string data constituted by ASCII characters enclosed in double quotation mark (“”).
Numerical data
Integer (NR1), fixed-point number (NR2), or floating-point number (NR3). Numerical range is±9.9E37.
Take NR1 as example
123
+123
-123
Take NR2 as example
12.3
+1.234
-123.4
Take NR3 as example
12.3E+5
123.4E-56

Refernce Command

DISPlay Command

Display: PAGE command is to set the display mode. Display: PAGE? query returns the display setting of the current test result.

Measurement: measuring display page
SYSsetup: system setting page

Query Syntax: DISPlay: PAGE BINSetup
Query Response:  {DIRect,PERcent,ABSolute},

Function Subsystem Command

Function Subsystem Tree

Function Command
Function command is to set type of Parameter AB. FUNCtion? query returns the current testing parameter ( the main and secondary parameter can be arbitrary selection, there are 42 kinds of test mode, only take several mode to make example.)

C_D: capacitance_loss
R_X: resistance _reactance
Z_RAD: impedance _arc
G_B: conductance _susceptance
Y_R: admittance_resistance
L_r: inductance_angle
Query Syntax:| FUNCtion?
Query| {L_Q,C_D,R_X,Z_RAD,G_B,Y_R,L_r},

Response

Function:IMPedance: AUTO Command
FUNCtion:IMPedance: AUTO command is to set automatic range switch of parameter.
Function: IMPedance: AUTO? query returns the current range mode.

OFF： disable automatic range
Query Syntax：| Function:IMPedance:AUTO?
Query Response：| {ON,OFF},   

Function:IMPedance: RANGe Command
Function:IMPedance: RANGe command is to set range number.
Function:IMPedance: RANGe? query returns the current range number.

Command Syntax：| Function:IMPedance:RANGe {3,10,30,100,300,1k,3k,10k,30k,100k,300k}
---|---
Parameter：| 3： 3Ω range
10： 10Ω range
30： 30Ω range
100： 100Ω range
300： 300Ω range
1k： 1kΩ range
3k： 3kΩ range
10k： 10kΩ range
30k： 30kΩ range
100k： 100kΩ range
300k： 300kΩ range
Query Syntax：| Function:IMPedance: RANGe?
Query Response：| {3,10,30,100,300,1k,3k,10k,30k,100k,300k},

FREQuency Command

Frequency command is to set the frequency of test signal source.
Frequency? query returns the current frequency of test signal source.

120：set test frequency as 120 Hz.
1k: set test frequency as 1 kHz.
10k：set test frequency as 10 kHz.
Query Syntax：| Frequency?
Query Response：| {100,120,1k,10k},

LEVel Subsystem Command

LEVel Subsystem Tree

Level: VOLTage Command
Leve l: V OLTage command is to set output voltage of test signal source.
Level: VOLTage? query returns the output voltage of test signal source.

0.3V： set the output voltage of signal source as 0.3V.
0.1V: set the output voltage of signal source as 0.1V.
Query Syntax：| Level: VOLTage?
Query Response：| {1.0V,0.3V,0.1V},

Level: SRESistance Command
Level: SRESistance command is to set output resistance of signal source.
Level: resistance? query returns the current output resistance setting of signal source.

100： set the output resistance of signal source as 100 Ω.
Query Syntax：| Level: resistance?
Query Response：| {30,100},

SPEED Command

SPEED command is to set test speed. SPEED? query returns the current setting of test speed.

Medium： medium speed about 6.25 time/s.
FAST: fast speed about 20 time/s
Query Syntax：| SPEED?
Query Response：| {SLOW,MEDIUM,FAST},

MODE Command

MODE command is to set test equivalent mode. MODE? query returns the current test equivalent mode

PAR： parallel equivalent mode
Query Syntax：| MODE?
Query Response：| {SER,PAR},

Correction Subsystem Command

Correction Subsystem Tree

Correction:OPEN: STATe Command
Correction:OPEN: STATe command is to set the status of open circuit zero switch.
Correction:OPEN: STATe? query returns the current status open circuit zero switch.

OFF： disable open circuit zero switch
Query Syntax：| Correction:OPEN: STATe?
Query Response：| {ON,OFF}

Correction:SHORt: STATe Command

Correction:SHORt: STATe command is to set the status of open circuit zero switch.
Correction:SHORt: STATe? query returns the current status open circuit zero switch.

OFF： disable open circuit zero switch
Query Syntax：| Correction:SHORt: STATe?
Query Response：| {ON,OFF}

Correction: OPEN Command
Correction: OPEN command is to perform open circuit zero function（Only when the
open circuit zero switch status is ON, the circuit can be cleared correctly.）

Correction: SHORt Command
Correction: SHORt command is to perform open circuit zero function（Only when the open circuit zero switch status is ON, the circuit can be cleared correctly.

Trigger Command

Trigger Subsystem Tree

Trigger:SOURce Command
Trigger: SOURce command is to set trigger mode.
Trigger: SOURce? query returns the current trigger mode.

Externa l： external trigger mode
Immediate: generate a test immediately
Query Syntax：| Trigger: SOURce?
Query Response：| {INT,BUS,MAN,EXT}

Trigger Command
TRIGger (*TRG)

Fetch？

Fetch? query returns the last test results of the main and secondary parameter.

COMParator Subsystem Command

COMParator Subsystem Tree

COMParator:STATAe Command
COMParator: STATAe command is to set the comparator status of the main parameter.
COMParator: STATAe? query returns the comparator status of the main parameter.

OFF： disable the comparator of the main parameter
Query Syntax：| COMParator: STATAe?
Query Response：| {ON,OFF},

COMParator: STATBe Command
COMParator: STATBe command is to set comparator status of secondary parameter.
COMParator: STATBe? query returns the comparator status of secondary parameter.

OFF： disable the comparator of secondary parameter
Query Syntax：| COMParator: STATBe?
Query Response：| {ON,OFF},

COMParator: MODE Command
COMParator: MODE command is to set the comparative mode.
COMParator: MODE? query returns the current comparative mode.

PER： percentage deviation mode
SEQ: sequential mode
Query Syntax：| COMParator: MODE?
Query Response：| {ABS,PER,SEQ},

COMParator:TOLerance: NOMinal Command
COMParator:TOLerance: NOMinal command is to set the current nominal value. The
comparator uses this nominal value to calculate absolute and percentage deviations.
COMParator:TOLerance: NOMinal? query returns the current nominal value.

COMParator:TOLerance:BIN Command
COMParator:TOLerance: BIN command is to set the current upper/lower limit of BIN
COMParator:TOLerance: BIN? query returns to the current upper/lower limit