UNI-T UTR2810E LCR Digital Bridge Meter User Manual

3 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,
Wrong: LIMIT︺:︺NOMINAL
Right: LIMIT: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 ,

4 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 SRESISTOR , according to abbreviation rule, the short form is SRES.

5 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

6 Refernce Command

6.1 DISPlay Command

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

Command Syntax:

| DISPlay:PAGE {BINSetup,MEASurement,SYSsetup}
---|---

Parameter:

| BINSetup: sorting setting page
MEASurement: measuring display page
SYSsetup: system setting page

Query Syntax:

| DISPlay:PAGE BINSetup

Query Response:

| {DIRect,PERcent,ABSolute},

6.2 FUNCtion Subsystem Command

FUNCtion Subsystem Tree

6.2.1 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.)

Command Syntax:

| FUNCtion {L_Q,C_D,R_X,Z_RAD,G_B,Y_R,L_r}
---|---

Parameter:

| L_Q: inductance_quality factor
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 Response:

| {L_Q,C_D,R_X,Z_RAD,G_B,Y_R,L_r},

6.2.2 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.

Command Syntax:

| FUNCtion:IMPedance:AUTO {ON,OFF}
---|---

Parameter:

| ON: enable automatic range
OFF: disable automatic range

Query Syntax:

| FUNCtion:IMPedance:AUTO?

Query Response:

| {ON,OFF},

6.2.3 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},

6.3 FREQuency Command

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

Command Syntax:

| FREQuency {100,120,1k,10k}
---|---

Parameter:

| 100: set test frequency as 100 Hz.
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},

6.4 LEVel Subsystem Command

LEVel Subsystem Tree

6.4.1 LEVel:VOLTage Command

LEVel:VOLTage command is to set output voltage of test signal source.
LEVel:VOLTage? query returns the output voltage of test signal source.

Command Syntax:

| LEVel:VOLTage {1.0V,0.3V,0.1V}
---|---

Parameter:

| 1.0V: set the output voltage of signal source as 1.0V.
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},

6.4.2 LEVel:SRESistance Command

LEVel:SRESistance command is to set output resistance of signal source.

LEVel:SRESistance? query returns the current output resistance setting of signal source.

Command Syntax:

| LEVel:SRESistance {30,100}
---|---

Parameter:

| 30: set the output resistance of signal source as 30 Ω.
100: set the output resistance of signal source as 100 Ω.

Query Syntax:

| LEVel:SRESistance?

Query Response:

| {30,100},

6.5 SPEED Command

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

Command Syntax:

| SPEED {SLOW,MEDium,FAST}
---|---

Parameter:

| SLOW: slow speed about 3 time/s.
MEDium: medium speed about 6.25 time/s.
FAST: fast speed about 20 time/s

Query Syntax:

| SPEED?

Query Response:

| {SLOW,MEDIUM,FAST},

6.6 MODE Command

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

Command Syntax:

| MODE {SER,PAR}
---|---

Parameter:

| SER: serial equivalent mode
PAR: parallel equivalent mode

Query Syntax:

| MODE?

Query Response:

| {SER,PAR},

6.7 CORRection Subsystem Command

CORRection Subsystem Tree

6.7.1 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.

Command Syntax:

| CORRection:OPEN:STATe {ON,OFF}
---|---

Parameter:

| ON: enable open circuit zero switch
OFF: disable open circuit zero switch

Query Syntax:

| CORRection:OPEN:STATe?

Query Response:

| {ON,OFF}

6.7.2 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}

6.7.3 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.)

Command Syntax:

| CORRection:OPEN
---|---

Query Response:

| open circuit clearing is success

6.7.4 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.)

Command Syntax:

| CORRection:SHORt
---|---

Query Response:

| short circuit is success

6.8 TRIGger Command

TRIGger Subsystem Tree

6.8.1 TRIGger:SOURce Command

TRIGger:SOURce command is to set trigger mode.

TRIGger:SOURce? query returns the current trigger mode.

Command Syntax:

| TRIGger:SOURce {INT,BUS,MAN,EXT}
---|---

Parameter:

| INTernal: internal trigger mode
EXTernal: external trigger mode
IMMediate: generate a test immediately

Query Syntax:

| TRIGger:SOURce?

Query Response:

| {INT,BUS,MAN,EXT}

6.8.2 TRIGger Command

TRIGger (*TRG)

Command Syntax:

| TRIGger or (*TRG)
---|---

Query Response:

| TRIGger start

6.9 FETCh

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

Command Syntax:

| FETCh?
---|---

Query Response:

| < primary>,

6.10 COMParator Subsystem Command

COMParator Subsystem Tree

6.10.1 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.

Command Syntax:

| COMParator:STATAe {ON,OFF}
---|---

Parameter:

| ON: enable the comparator of the main parameter
OFF: disable the comparator of the main parameter

Query Syntax:

| COMParator:STATAe?

Query Response:

| {ON,OFF},

6.10.2 COMParator:STATBe Command

COMParator:STATBe command is to set comparator status of secondary parameter.

COMParator:STATBe? query returns the comparator status of secondary parameter.

Command Syntax:

| COMParator:STATBe {ON,OFF}
---|---

Parameter:

| ON: enable the comparator of secondary parameter
OFF: disable the comparator of secondary parameter

Query Syntax:

| COMParator:STATBe?

Query Response:

| {ON,OFF},

6.10.3 COMParator:MODE Command

COMParator:MODE command is to set the comparative mode.

COMParator:MODE? query returns the current comparative mode.

Command Syntax:

| COMParator:MODE {ABS,PER,SEQ}
---|---

Parameter:

| ABS: absolute deviation mode
PER: percentage deviation mode
SEQ: sequential mode

Query Syntax:

| COMParator:MODE?

Query Response:

| {ABS,PER,SEQ},

6.10.4 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.

Command Syntax:

| COMParator:TOLerance:NOMinal
---|---

Parameter:

| the nominal value in the form of NR1,NR2,NR3

Query Syntax:

| COMParator:TOLerance:NOMinal?

Query Response:

| < NR3>

6.10.5 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

Command Syntax:

| COMParator:TOLerance: BIN ,
---|---

Parameter:

| 1 to 3 (NR1), range number