Fluke 5520A Service Handbuch

PN 688744

February, 1998

All product names are trademarks of their respective companies.

5520A

Multi-Product Calibrator

Programmers Guide

Table of Contents

Types of Commands ........................................... 3

Device-Dependent Commands......................... 3

Common Commands ....................................... 3

Query Commands ............................................ 3

Compound Commands..................................... 3

Coupled Commands ........................................ 3

Overlapped Commands ................................... 3

Sequential Commands..................................... 3

Commands for RS-232 Only............................. 3

Command Syntax................................................ 4

General Syntax Rules ...................................... 4

Units Accepted in Parameters and Responses. 5

Incoming Character Processing ....................... 6

Terminator Characters ..................................... 7

Response Message Data Types....................... 7

Checking 5520A Status ....................................... 8

Status Register Summary ................................ 8

STB and SRE .................................................. 9

ESR and ESE ................................................ 10

ISR, ISCE, and ISCR ..................................... 11

Service Request Enable Register (SRE) ........ 12

Output Queue ................................................ 12

Error Queue................................................... 12

Command Summary.......................................... 13

Common Commands ..................................... 13

Error Mode Commands .................................. 14

External Connection Commands .................... 15

Oscilloscope Commands................................ 16

Output Commands ......................................... 18

Pressure Measurement Commands ............... 20

RS-232 Host Port Commands ........................ 21

RS-232 UUT Port Commands ........................ 21

Setup and Utility Commands .......................... 22

Status Commands ......................................... 24

Thermocouple (TC) Measurement Commands 25

Command List ................................................... 26

Warning

The 5520A Calibrator (hereafter

referred to as “The Calibrator”) can

produce voltages up to 1000 V rms and

must be programmed with caution to

prevent hazardous voltages from being

produced without sufficient warning to

the operator.

Write programs carefully and test them

extensively to ensure safe operation of

the Calibrator. Fluke suggests that you

include error-catching routines in your

programs. These error-catching

routines will help you identify

programming errors that may cause the

calibrator to behave other than

intended. You can program the

Calibrator to cause an SRQ when an

error is detected by setting the Service

Request Enable (SRQ) register. The

following skeleton program includes

error-catching code:

10 PRINT @4, “*CLS” ! Clear status

20 PRINT @4, “*SRE 8” ! Set SRE Error Avail.

30 ON SRQ GOTO 1000 ! Enable SRQ Function

100 ! Body of program here

900 STOP ! End of program

1000 REM Start of SRQ Handler ! Start routine

1010 PRINT @4, “FAULT?” ! Request fault code

1020 INPUT @4, A% ! Input fault code

1030 PRINT @4, “EXPLAIN? ”;A%! Request fault text

1040 INPUT @4, A$ ! Input fault text

1050 PRINT “Fault ”;A$“ detected” ! Print message

1060 PRINT @4, “STBY” ! Place 5520A in standby

1070 STOP

Types of Commands

Device-Dependent Commands

Commands unique to 5520A.

Common Commands

Commands defined by the IEEE 488.2 standard.

Query Commands

Commands ending with a ?.

Compound Commands

Two or more commands in a single command line.

Coupled Commands

Commands that could interfere with each other.

Overlapped Commands

Commands requiring more time to execute.

Sequential Commands

Commands that execute immediately.

Commands for RS-232 Only

IEEE-488 RS-232 Equivalent

GTL LOCAL command

GTR REMOTE command

LLO LOCKOUT command

SRQ SRQSTR command

SDC, DCL ^C (<Ctrl> C) character [clear the

device]

GET ^T (<Ctrl> T) character [execute a

group trigger]

SPE, SPD ^P (<Ctrl> P) character [print the

serial poll string]

Also: SP_SET SPLSTR SRQSTR

SP_SET? SPLSTR? SRQSTR?

Command Syntax

General Syntax Rules

1. Separate parameters with commas.

2. Numeric parameters up to 15 significant digits

and exponents in the range ±1.0E ±20.

3. Null parameters cause an error, e.g., the

adjacent commas in OUT 1V, ,2A.

4. Expressions, for example 4 +2 ∗13, are not

allowed as parameters.

5. Binary Block Data can be in one of two IEEE

488.2 formats:

Indefinite Length Format Accepts data bytes

after #0 until the ASCII Line Feed character is

received with an EOI signal (for RS-232, a line

feed or carriage return will terminate the block).

Definite Length Format The data bytes are

preceded by #n and an n-digit number, which

identifies how many data bytes follow.

6. One space after a command is required. You

can insert extra spaces or tabs between

commands and arguments.

Command Syntax (cont)

Units Accepted in Parameters and

Responses

Units Meaning

HZ Frequency in hertz

KHZ Frequency in kilohertz

MHZ Frequency in megahertz

UV Volts in microvolts

MV Volts in millivolts

V Volts in volts

KV Volts in kilovolts

UA Current in microamperes

MA Current in milliamps

A Current in amps

PCT Percent

PPM Parts-per-million

DBM Volts in decibels referenced to 1

milliwatt into 600Ωload

OHM Resistance in ohms

KOHM Resistance in kilohms

MOHM Resistance in megohms

NF Capacitance in nanofarads

PF Capacitance in picofarads

UF Capacitance in microfarads

MF Capacitance in millifarads

F Capacitance in farads

CEL Temperature in degrees Celsius

FAR Temperature in degrees Fahrenheit

Command Syntax (cont)

Units Accepted in Parameters and

Responses (cont)

Units Meaning

NS Period in nanoseconds

US Period in microseconds

MS Period in milliseconds

S Period in seconds

PSI Pressure in pound-force per square

inch

MHG Pressure in meters of mercury

INHG Pressure in inches of mercury

INH2O Pressure in inches of water

FTH2O Pressure in feet of water

MH2O Pressure in meters of water

BAR Pressure in bar

PAL Pressure in pascal

G/CM2 Pressure in grams per centimeter

squared

INH2O60F Pressure in inches of water at 60

degrees Fahrenheit

Incoming Character Processing

1. The most significant data bit (DIO8) is ignored.

2. All data is taken as 7-bit ASCII.

3. Lower-or upper-case characters.

4. ASCII characters less than 32 (Space) are

discarded, except for characters 10 (LF) and

13 (CR), and in the *PUD command argument.

Command Syntax (cont)

Terminator Characters

ASCII

Function # Code Control C Code

Carriage

Return

13 Chr(13) <Ctrl> M \n

Line Feed 10 Chr(10) <Ctrl> J \r

Backspace 8 Chr(8) <Ctrl> H \b

Form Feed 12 Chr(12) <Ctrl> L \f

EEE-488 Interface The Calibrator sends the

ASCII character Line Feed with the EOI control

line held high as the terminator for response

messages.

RS-232 Interface The Calibrator returns an EOL

(End of Line) character with each response,

selectable as CR, LF or both CRLF.

Response Message Data Types

Data Type Description

Integer Decimal numbers to 32768.

Floating Numbers plus an exponent.

String ASCII characters within

double or single quotes

(“string” or ‘string’).

Binary Block Data Defined by the IEEE-488.2.

Checking 5520A Status

Status Register Summary

Status Register Read Write

Serial Poll Status Byte

(STB)

*STB? 

Service Request Enable

*SRE? *SRE

Event Status Register

(ESR)

*ESR? 

Event Status Enable

*ESE? *ESE

Instrument Status Register

(ISR)

ISR? 

Instrument Status Change

ISCR? 

ISCR 1 to 0 transition ISCR0? 

ISCR 0 to 1 transition ISCR1? 

Instrument Status Change

Enable Register (ISCE)

ISCE? ISCE

ISCE 1 to 0 transition ISCE0? ISCE0

ISCE 0 to 1 transition ISCE1? ISCE1

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