Druck DPI 142 Operating Manual

Pressure Indicator DPI 142/150

Standard Commands for Programmable Instruments SCPI User Manual K381

Infrastructure

Sensing

Introduction

This technical manual provides programming and communication instructions for the Druck DPI 142/150 Pressure Indicator compatible with the requirements of a programming technician.

! Scope

This technical manual contains the communications protocol for the operator of this equipment .

! Software

This technical manual applies to software version 2.

Safety

! The manufacturer has designed this product to be safe when operated

using the procedures detailed in this manual. Do not use this product for any other purpose than that stated.

! This publication contains operating and safety instructions that must be followed

to make sure of safe operation and to maintain the equipment in a safe condition. The safety instructions are either warnings or cautions issued to protect the user and the equipment from injury or damage.

! Use qualified* programming technicians and good engineering practice for all

procedures in this publication.

" Pressure

Do not apply pressure greater the maximum safe working pressure to the Druck DPI 142/150 Pressure Indicator.

" Maintenance

The Druck DPI 142/150 Pressure Indicator must be maintained using the manufacturers procedures and should be carried out by authorised service agents or the manufacturers service departments.

" Technical Advice

For technical advice contact the manufacturer or subsidiary.

* A programming technician must have the necessary specialist knowledge of

programming, technical knowledge and documentation to carry out the required work on the Druck DPI 142/150 Pressure Indicator.

Associated Druck Documents:

K343 DPI 142 User Manual K344 DPI 150 User Manual K382 DPI 142/150 Calibration Manual

Associated Documents:

A beginners Guide To SCPI by Barry Eppler, Published by Addison-Wesley Publishing Company Inc. for Hewlett Packard (ISBN 0-201-56350-9).

K381 Issue No. 1

Table of Contents

Preliminary p ages

Section page

Introduction ............................................................................................................................ i

Safety ............................................................................................................................ i

Table of contents (this table) ............................................................................................................................ ii

List of Illustrations ............................................................................................................................ iv

List of Tables ............................................................................................................................ iv

Abbreviations ............................................................................................................................ v

Pressure measurement units ............................................................................................................................ v

Code Definitions ............................................................................................................................ vi

Glossary ............................................................................................................................ vii

Pressure unit conversions ............................................................................................................................ ix

Section page

1 INTRODUCTION ....................................................................................................... 1-1

2 COMMAND STRUCTURE ................................................................................................... 2-1

2.1 Notation ............................................................................................................................ 2-1

2.2 Message terminators ............................................................................................................................ 2-1

2.3 Program headers ............................................................................................................................ 2-3

2.4 SCPI data types ............................................................................................................................ 2-4

2.5 Output Queue ............................................................................................................................ 2-6

3 COMMAND AND QUERY SUMMARY ............................................................................... 3-1

3.1 Command structure ............................................................................................................................ 3-1

CALibration ............................................................................................................................ 3-3

:CAL:DIOD:ABOR ............................................................................................................................ 3-3

:CAL:DIOD:ACC ............................................................................................................................ 3-4

:CAL:DIOD:POIN ............................................................................................................................ 3-5

:CAL:DIOD:SAMP ............................................................................................................................ 3-6

:CAL:DIOD:SAMP:STAR ............................................................................................................................ 3-7

:CAL:DIOD:VAL ............................................................................................................................ 3-8

:CAL:PRES:ABOR ............................................................................................................................ 3-9

:CAL:PRES:ACC ............................................................................................................................ 3-10

:CAL:PRES:POIN ............................................................................................................................ 3-11

:CAL:PRES:SAMP ............................................................................................................................ 3-12

:CAL:PRES:SAMP:STAR ............................................................................................................................ 3-13

:CAL:PRES:VAL ............................................................................................................................ 3-14

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iii

Section

Table of Contents (contd)

page

INSTrument ............................................................................................................................ 3-15

:INST:CAT ............................................................................................................................ 3-15

:INST:SN ............................................................................................................................ 3-16

SENSe ............................................................................................................................ 3-17

:SENS:PRES ............................................................................................................................ 3-17

:SENS:ALT ............................................................................................................................ 3-18

:SENS:SPE ............................................................................................................................ 3-19

:SENS:MACH ............................................................................................................................ 3-20

:SENS:RANG ............................................................................................................................ 3-21

SYSTem ............................................................................................................................ 3-22

:SYST:ERR ............................................................................................................................ 3-22

:SYST:PASS ............................................................................................................................ 3-24

:SYST:PASS:CDIS ............................................................................................................................ 3-25

:SYST:PASS:STAT ............................................................................................................................ 3-26

UNIT ............................................................................................................................ 3-27

:UNIT ............................................................................................................................ 3-27

3.2 * Standard commands ........................................................................................................................... 3-29

*CLS ............................................................................................................................ 3-29

4 ERRORS ............................................................................................................................ 4-1

K381 Issue No. 1

List of Illustrations

Figure page

Figure 1-1 System Model ............................................................................................................................ 1-1

Figure 3-1 Command and Query Summary ...................................................................................... 3-2

Table

List of Tables

pa ge

4-1 Errors -100 to -199 ............................................................................................................................ 4-1

4-2 Errors -200 to -299 ............................................................................................................................ 4-2

4-3 Errors -300 to -400 ............................................................................................................................ 4-2

4-3 Errors +201 to +212 ............................................................................................................................ 4-3

K381 Issue No. 1

Abbreviations

The following abbreviations are used in this manual; abbreviations are the same in the singular and plural.

abs Absolute ASCII American Standard Code for Information Interchange ATE Automatic test equipment e.g. For example etc. And so on Fig. Figure ft Foot g Gauge GPIB General purpose interface bus i.e. That is IEEE 488 Institute of Electrical and Electronic Engineers standard 488 data m Metre max Maximum mbar Millibar min Minute or minimum No. Number qa Quasi-absolute (combination of barometric and gauge sensor readings) RS232 Serial communications standard SCM Sensor cal ibration module SCPI Standard commands for programmable instruments +ve Positive

-ve Negative °C Degrees Celsius °F Degrees Fahrenheit

Pressure measurement units

The following units are used in this manual

ATM atmosphere BAR bar

CMH2O centimetres of water at 20°C CMHG centimetres of mercury FTH2O feet of water at 20°C FTH2O4 feet of water at 4°C HPA hecto Pascals INH2O inches of water at 20°C INH2O4 inches of water at 4°C INH2O60 inches of water at 60°F INHG inches of mercury KG/CM2 kilogrammes per square centimetre KG/M2 kilogrammes per square metre KPA kilo Pascals LB/FT2 pounds per square foot MH2O metres of water MHG metres of mercury MMH2O millimetres of water MMHG millimetres of mercury MPA mega Pascals PA Pascals PSI pounds per square inch TORR torr MBAR millibar

K381 Issue No. 1

Code Def initions

The following codes are used in this manual.

ALT Altitude ACC Accept CAL Calibration CAT Catalogue CLS Clear COND Condition CONF Configuration DIOD Diode ERR Error INST Instrument MACH Mach number PASS Passive POIN Point PRES Pressure RANG Range SAMP Sample SENS Sense SPE Speed STAT State SYST System UNIT Unit of pressure VAL Value

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vii

Glossary

Terminology

The terminology used in this manual is specific and individual interpretation must not be introduced. The terms are defined as follows:

Adjust To bring to a more satisfactory state; to manipulate controls, levers, linkages,

etc. to return equipment from an out-of-tolerance condition to an in-tolerance condition.

Align To bring into line; to line up; to bring into precise adjustment, correct relative

position or coincidence.

Assemble: To fit and secure together the several parts of; to make or form by combining

parts.

Calibrate: To determine accuracy, deviation or variation by special measurement or by

comparison with a standard.

Check: Make a comparison of a measure of time, pressure, temperature, resistance,

dimension or other quality with a known figure for that measurement.

Disconnect: To detach the connection between; to separate keyed or matched equipment

parts.

Dismantle: To take apart to the level of the next smaller unit or down to all removable parts.

Examine: To perform a critical visual observation or check for specific conditions; to test the

condition of.

Fit: Correctly attach one item to another.

Inspect: Review the work carried out by Specialists to ensure it has been performed

satisfactorily.

Install: To perform operations necessary to properly fit an equipment unit into the next

larger assembly or system.

Maintain: To hold or keep in any particular state or condition especially in a state of

efficiency or validity.

Operate: Make sure that an item or system functions correctly as far as possible without

the use of test equipment or reference to measurement.

Readjust: To adjust again; to move back to a specified condition; to bring back to an

in-tolerance condition.

K381 Issue No. 1

Reconnect: To rejoin or refasten that which has been separated.

Refit: Fit an item which has previously been removed.

Remove: To perform operations necessary to take an equipment unit out of the next larger

assembly or system. To take off or eliminate. To take or move away.

Repair: To restore damaged, worn out or malfunctioning equipment to a serviceable,

usable or operable condition.

Replace: Remove an item and fit a new or a serviced item.

Reset: To put back into a desired position, adjustment or condition.

Service: To perform such operations as cleaning, lubricating and replenishing to prepare for

use.

Test: Ascertain by using the appropriate test equipment that a component or system

functions correctly.

viii

K381 Issue No. 1

Pressure unit conversions

rab 000001 tf/fbl

ni/fbl

tinuerusserP )slacsaP(rotcaF tinuerusserP )slacsaP(rotcaF

)isp( 67.4986 gHni 93.6833

3088.74

O 56.6089 Hni

rabm 001 Htf

mc/fgk

m/fgk

5.66089 mta 0.523101

56608.9 tf/ldp

gHmm 223.331 mc/nyd

]1[O 980.942

]1[O 70.9892

gHmc 22.3331 rabh 00000001

gHm 0.223331 tf/fnot

H/mm

H/mc

m/N

]1[O 56608.9 ni/fnot

]1[O 5660.89 Hni

1 Htf

aPh 001 mm/pk

aPk 0001 mc/pk

aPM 0000001 m/pk

)KU( 0.252701

)KU( 00344451

rrot 223.331

Table of pressure units and conversion factors

61884.1

1.0

]2[)ASU(O 53146.842

]2[)ASU(O 3896.3892

0566089

5.66089

56608.9

Unit Conversion To convert FROM pressure VALUE 1 in pressure UNITS 1

TO pressure VALUE 2 in pressure UNITS 2, calculate as follows:

VALUE 2 = VALUE 1 x FACTOR 1

FACTOR 2

Note:

The conversion factor for pressure units referenced [1] are calculated for a water temperature of 4°C. Pressure units referenced [2] are calculated for a water temperature of 68°F, these units are normally used in the US A.

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K381 Issue No. 1

Druck DPI 142/150 SCPI User Manual 1 - 1

UNITs

sub-system

CALibration sub-system

SENSe

sub-system

SYSTem

sub-system

System Model

SCPI starts with a high-level block diagram of the measurement functions of the instrument . Each functional block is broken down into smaller block diagrams. SCPI contains a hierarchy of commands called a subsystem that maps directly to the hierarchy of the block diagram.

1 INTRODUCTION

1.1 General

The IEEE 488 and RS232 interfaces of the DPI 142/150 Pressure Indicators provide remote control of the instrument from a suitable computer or controller. The SCPI protocol enables any instrument with a SCPI facility to be controlled using the same commands. The DPI 142/150 Pressure Indicators use a reduced SCPI command set and the defined SCPI syntax.

The following sections describe and define each instrument command used by the DPI 142/150 Pressure Indicators. Each section contains a quick reference structure of the relevant commands.

Pressure in

Figure 1-1 System Model

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1 - 2 Introduction

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K381 Issue No. 1

Druck DPI 142/150 SCPI User Manual 2 - 1

root Level 1 Level 2

A B

2 COMMAND STRUCTURE

This section describes the structure of the commands and data sent and received by the DPI 142/150 Pressure Indicator.

2.1 Notation

All SCPI commands are based on a hierarchical tree structure consisting of key words and parameters. Associated commands are grouped together under a common node in the hierachy.

In the command tree the command A is the root command. A tree pointer is used to decode the SCPI commands. At power-up the pointer goes to the root command.

2.2 Message Terminators

All SCPI commands are terminated by line feed i.e., either <newline> (ASCII character, decimal 10), EOI for IEEE. After receiving a termination character the tree pointer returns to the root command.

Colon

A colon moves the current path down one level in the command tree, (e.g., the colon in UNIT:PRESSURE specifies PRESSURE the is one level below UNIT). When the colon is the first character of the command, it specifies that the next command is a root level command (e.g., :UNIT specifies that UNIT is a root level command).

K381 Issue No. 1

2 - 2 Command Syntax

Semicolon

A semicolon separates two commands in the same message without changing the tree pointer.

(e.g., with reference to the tree) :A:B:E;F:G This equivalent to sending three messages

:A:B:E :A:B:F :A:B:G

SCPI commands are not case sensitive and may have a short form. In this manual, upper case letter identify the short form.

(e.g.) :INSTrument:SN?

Some nodes can be the default node and these key words are optional when programming the command. The instrument processes the command, with the same effect , with or without the option node. In this manual [] enclose [default notes].

(e.g.) :UNIT[:PRESsure:]? can be sent as

:UNIT:PRESsure?

:UNIT?

This gives the pressure units

Druck DPI 142/150 SCPI User Manual 2 - 3

2.3 Program Headers

Program headers are keywords that identify a command, instruments accept both upper and lower case characters in a program header. There are two types of program header, common command headers and instrument control headers; each header can be a command or a query.

Common Command and Query Headers

The common command and query program header syntax, specified in IEEE

488.2, are defined as follows: Command

*<PROGRAM MNEMONIC>

Query

*<PROGRAM MNEMONIC>?

Instrument Control Command and Query Headers

The instrument control command and query program header syntax controls and extracts data from the instrument as follows: Command

:<MNEMONIC> :<MNEMONIC> <PARAMETER>

Query

:<MNEMONIC>?

Queries

Most SCPI commands can be queried. A query is a command header with an attached question mark character (?). On receiving a query command, the current settings for the command are loaded in the output buffer. A query does not affect the operation or set-up of the instrument .

When the parameter contains enumerated character data, both long form and short form are recognised. Querying the command causes the return of data in the short form.

Querying numeric parameters causes the resulting data to be returned in the units selected by the instrument unless specified otherwise.

K381 Issue No. 1

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