Series it2000 User`s Manual
Series it2000 Intelligent
Pressure Transducer
User’s Manual
Firmware Version 217928G
Stellar Technology Incorporated
Copyright Notice
© 2004 Stellar Technology Incorporated. All rights reserved.
This manual, as well as the software described in it, is furnished under license and may be used
or copied only in accordance with the terms of such license. The content of this manual is furnished for informational use only, is subject to change without notice, and should not be construed as a commitment by Stellar Technology Incorporated. Stellar Technology Incorporated
assumes no responsibility or liability for any errors or inaccuracies that may appear in this book.
Except as permitted by such license, no part of this publication may be reproduced, stored in a
retrieval system, or transmitted in any form or by any means, electronic, mechanical, recording,
or otherwise, without the prior written permission of Stellar Technology Incorporated.
it2000 is a trademarks of Stellar Technology Incorporated. it2000 logo and the STI logo are
trademarks of Stellar Technology Incorporated in the USA. Microsoft, Windows 9x/NT/2000/XP/
CE, Microsoft Access, and Microsoft Excel are registered trademarks of Microsoft Corporation. All
other products or name brands are the trademarks of their respective holders.
Part number: 217924 Rev G
Contents
Chapter 1: Overview ................................................................................................. 5
Standard Features...............................................................................................................................6
Chapter 2: Installation.............................................................................................. 9
Mechanical Connection.............................................................................................................................10
Electrical Connections ...............................................................................................................................11
Wiring Harness....................................................................................................................................12
Analog Output Connections ..............................................................................................................13
Communication Setup...............................................................................................................................14
Chapter 3: Quick-Start Tutorial................................................................................ 15
Connection .................................................................................................................................................16
Basic Measurements ..................................................................................................................................17
Chapter 4: Using Commands ................................................................................... 19
Command and Query Structure ........................................................................................................20
Command Entry..................................................................................................................................21
Argument Types ..................................................................................................................................22
Command Usage Rules ......................................................................................................................24
Syntax Diagrams .................................................................................................................................24
Chapter 5: Command Reference.............................................................................. 25
Measure Subsystem ...................................................................................................................................26
Test Commands..........................................................................................................................................28
System Commands ....................................................................................................................................30
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Series it2000 User’s Manual
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H A P T E R
1
Overview
This chapter gives a brief overview of the features and functionality of the Series
it2000 Pressure Transducer.
Contents
•
Standard Features .........................................................................6
6
Series it2000 User’s Manual
Standard Features
The it2000 is an intelligent pressure transducer that provides both corrected
digital and analog outputs.
A host of subsystems enable the it2000 to be compatible with the Standard
Commands for Programmable Instruments (SCPI) specification version 1995.0.
Several advanced features are standard on all Series it2000 pressure transducers.
Options for custom pressure ports, electrical terminations and media
compatibility are available.
Highlights
• Standard Transducer Footprint
• Strain Gage Pressure Sensing
• 0.05% Full Scale Digital Accuracy
• RS-232 Digital Output
• SCPI Command Set
• -40oC to +85oC Operating Temperature Range
• 8-30Vdc Unregulated Input
• All-welded housing
Accuracy
A high level of accuracy (0.05% of full scale) is achieved by using the digital
compensation algorithms.
Flexibility
Test systems generally utilize either analog or digital subsystems. By
incorporating both into the transducer, any system can immediately benefit from
STI’s intelligent sensing technology. The choice of various output formats
contributes to a high degree of compatibility.
Reliable Sensing Technology
A high quality low-level signal is essential for any pressure sensing instrument –
intelligent or not. The it2000 utilizes the most proven and reliable pressure
sensing technology available. Bonded foil strain gage based pressure
measurement is very accurate and repeatable in addition to being insensitive to
vibration and acceleration. Sensing element design has been optimized to
provide the most accurate analog representation of the applied pressure.
STI’s sensing technology allows for the use of various materials for pressure cavity
designs. A wide range of media compatibility extends the transducer’s
interchangeability with non-intelligent sensors.
Analog Output
Existing test systems that are not yet capable of digital communications can
immediately benefit from the advanced capabilities of the it2000. An integrated
12 bit digital to analog converter provides an analog output range of 0.05-4.95
Vdc.
Chapter 1: Overview
7
RS-232 Output
An RS-232 capability provides digital communication to standard PC
communication port. Any PC compatible serial communications port can be
used.
SCPI Compliant
The it2000 utilizes the limited set of SCPI compliant commands to provide
complete control over the data acquisition process.
Complete documentation includes an SCPI tutorial for new users.
Temperature
Temperature variation can be greatly influence the accuracy of pressure
measurement. The sensing element, in addition to the microelectronics, is
thermally monitored and drift error is removed. Extensive factory calibration
testing conforming to MIL-STD-45662A ensures a high degree of instrument
characterization.
Data Acquisition
Several different types of measurements are required to create a single, highaccuracy pressure measurement. The tension and compression of the pressure
sensing element is measured in addition to it’s temperature by a high resolution
analog to digital converter.
The analog output is provided by a 12-bit digital to analog converter.
Calibration Software
The Series it2000 Calibration Suite CD contains several programs that run in the
Microsoft Windows 9x/NT/2000/XP environments. All of the transducer’s
commands can be executed via a click of a button. Additionally, terminal
emulation allows for the manual entry of commands. A Chart Recorder program
along with a Calibration Profile program are also provided on CD.
An Adobe Acrobat version of this User’s Manual can be found on the CD as well.
Custom Configuration
As with all STI products, the it2000 is offered in a standard configuration but can
be ordered with a variety of custom options to accommodate most applications.
Series it2000 technology can be incorporated into many other models in addition
to the standard configuration. Models that measure differential pressure and
those featuring external temperature probes are available.
Support
STI offers complete sales and technical support by contacting our factory directly
or through the Internet. Pre-sales information, firmware updates, application
notes, and answers to frequently asked questions are available on our website at
www.stellartech.com. E-mail addresses are provided for sales and technical
support in order to facilitate direct correspondence and expedite problem
resolution.
8
Series it2000 User’s Manual
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H A P T E R
2
Installation
This chapter describes the steps to install the Series it2000 Pressure Transducer.
Since the it2000 provides an RS-232 interface in addition to analog outputs, the
section “Communication Setup” is required for RS-232 interfacing only.
Contents
•
Mechanical Connection ...............................................................10
•
Electrical Connections ..................................................................11
•
Communication Setup .................................................................14
10
Series it2000 User’s Manual
Mechanical Connection
The standard it2000 configuration includes an MS33656-4 style pressure port and
is shown below.
7/8”
7/16-20UNJF-3A
Figure 2-1: Standard pressure port (MS33656-4).
Two types of connections can be used with the MS33656-4 style pressure port: a
compression fitting or manifold fitting using an o-ring.
O-ring
(A)
(B)
Figure 2-2: (A) Manifold fitting. Use of an o-ring is required. (B) Compression fitting.
Always secure transducer using wrench flats when tightening.
Orientation Sensitivity
Transducers with pressure ranges above 25 PSI are not orientation sensitive while
those with ranges of 25 PSI and below are orientation sensitive. Low-range
transducers are factory calibrated in the upright position with the pressure port
pointing downward and the electrical receptacle pointing upward.
Mounting Support
The it2000 features an all-welded body and generally does not require special
mounting for applications where acceleration levels do not exceed 25 GRMS.
Higher vibration levels can be supported by ordering special vibration packaging
options from the factory.
Chapter 2: Installation
11
Electrical Connections
The standard configuration of the it2000 features a welded electrical receptacle
and includes a mating connector with wiring harness and DC power supply.
Custom configurations are shipped with a User’s Manual Addendum that fully
explains the custom options and possible electrical connection differences.
Electrical Receptacle
The standard transducer configuration includes a six-pin electrical receptacle
(MIL-C-26482) and is wired as follows:
A
F
B
E
D
C
Figure 2-3: Electrical receptacle (standard configuration)
Table 2-1:
Pin
Symbol
A
B
C
D
E
F
+VIN
-VIN
+VOUT
TxD
RxD
Description
Power
Common
Signal
TXD
RXD
Shunt (short to Common for test)
Electrical receptacle wiring (standard configuration)
12
Series it2000 User’s Manual
Wiring Harness
The optional wiring harness provides an easy way to connect the transducer to an
RS-232 controller (PC), analog measurement equipment and an external power
supply.
Mating
Connector
+VOUT
Analog
Output
Shunt
ORG
BLU
DC Power
Connector
Common
BLK
RS-232
Connector
Figure 2-4: Standard it2000 interface cable.
DC Power Connector
Power is applied to the transducer by connecting the optional 12 VDC wall-mount
transformer to the inline 3.5mm mono phone jack routed from the RS-232
connector.
Chapter 2: Installation
13
RS-232 Connector
Serial data is transmitted and received using only three signals of the RS-232
connector. All digital output signals are galvanically isolated from the transducer
excitation supply.
5
4
9
3
8
2
7
Pin 2 - TxD
1
Pin 3 - RxD
6
Pin 5 - DGND
Figure 2-5: RS-232 pin assignments
Analog Output Connections
Voltage Output
The voltage output signal is measured between +VOUT and Common. All analog
output signals are galvanically isolated from the transducer excitation supply.
1.000v
V
I
+
_
DMM
R
+VOUT
RED
AGND
Shunt
BLK
ORG
it2000
Figure 2-6: Voltage output connection
14
Series it2000 User’s Manual
Communication Setup
The it2000 uses an RS-232 interface as a means of communication with a
controller. The default communication parameters are as follows:
Setting
Baud rate
Data bits
Stop bits
Parity
Flow control
Table 2-2:
Value
9600
8
1
none
none
RS-232 communication settings
Commands are sent in ASCII text using the syntax described Chapter 2, “Using
Commands”. All commands must be terminated with a carriage-return / line-feed
combination or a line-feed-only character sequence.
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3
Quick-Start Tutorial
This chapter gives you a quick guide on how to connect Series it2000 Pressure
Transducer and start using it’s basic functionality.
Contents
•
Connection ....................................................................................16
•
Basic Measurements .....................................................................17
16
Series it2000 User’s Manual
Connection
The standard Series it2000 Pressure Transducer has two output modes:
• Digital pressure and temperature (requires a RS-232 connection to a PC and a
Terminal program).
• Analog pressure output, V (requires connection to a voltmeter).
For more details on each type of connection see Chapter 4, “Installation”. The
standard Series it2000 Pressure Transducer may provide digital and analog
outputs at the same time.
Chapter 3: Quick-Start Tutorial
17
Basic Measurements
To make basic digital pressure or temperature measurements you may use the
standard Windows Terminal program with appropriate settings.
Steps required to make one digital pressure measurement using the Terminal
program:
1. Run Terminal program
2. Set communication port settings
3. Type in the command: meas:pres? terminated with the command terminator
(see Chapter 2, “Using Commands”)
4. An example of a Series it2000 Pressure Transducer response is shown below.
Figure 3-1: Windows Terminal program
For more commands see Chapter 3, “Command Reference”.
The standard Series it2000 Pressure Transducer ships with the “IT2000
Calibration Suite” which is a set of programs that provides a friendly user
interface for controlling all the functionality of the Series it2000 Pressure
Transducer. See the corresponding help file for each program in the “IT2000
Calibration Suite”.
The “IT2000 Calibration Suite” has to be installed in order to use.
Steps required to make one digital pressure measurement using the
“Communicate” program from the “IT2000 Calibration Suite”:
1. Run “Communicate” program
2. Check for appropriate communication port settings
3. Click “Measurements” button located on the toolbar
4. Click “Pressure” button on the “Measurements“ dialog box
5. An example of a Series it2000 Pressure Transducer response is shown below
6. Click “Temperature” button to get digital temperature reading.
18
Series it2000 User’s Manual
Figure 3-2: “Communicate“ program
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H A P T E R
4
Using Commands
The it2000 is controlled through the RS-232 interface using a large group of
commands and queries. This chapter describes the syntax these commands and
queries use and the conventions the transducer uses to process them. The
commands and queries themselves are listed in Chapter 3, “Command
Reference”.
Contents
•
Command and Query Structure ...................................................20
•
Command Entry ............................................................................21
•
Argument Types ............................................................................22
•
Command Usage Rules .................................................................24
•
Syntax Diagrams ............................................................................24
20
Series it2000 User’s Manual
Commands are transmitted to the transducer using the American Standard Code
for Information Interchange (ASCII) character encoding.
This manual uses Backus-Naur Form (BNF) notation and syntax diagrams to
describe commands and queries. The following BNF symbols:
Symbol
< >
::=
|
{}
[]
...
()
Table 4-1:
Meaning
Defined element
Is defined as
Exclusive OR
Group; one element is required
Optional; can be omitted
Previous element(s) may be repeated
Comment
BNF Symbols and Meanings
Command and Query Structure
Commands consist of set commands and query commands (usually simply called
commands and queries). Commands modify instrument settings or tell the
transducer to perform a specific action. Queries cause the transducer to return
data and information about its status.
Most commands have both a set form and a query form. The query form of the
command is the same as the set form but with a question mark at the end. For
example, the set command INPut:GAIN has a query form INPut:GAIN?. Not all
commands have both a set and a query form; some commands are set only and
some are query only.
A command message is a command or query name, followed by any information
the transducer needs to execute the command or query. Command messages
consist of five different element types, defined as follows:
Symbol
Meaning
<Header>
The basic command name. If the header ends with a
question mark, the command is a query. The header
may begin with a colon (:) character; if the command is
concatenated with other commands the beginning
colon is required. The beginning colon can never be
used with a command beginning with an asterisk (*).
A header sub-function. Some commands headers have
only one mnemonic. If a command header has multiple
mnemonics, they are always separated from each other
by a colon (:) character.
<Mnemonic>
Chapter 4: Using Commands
21
Symbol
Meaning
<Argument>
<Comma>
<Space>
Table 4-2:
A quantity, quality, restriction, or limit associated with
the header. Not all commands have multiple
arguments. Arguments are separated from the header
by a <Space>. Arguments are separated from each
other by a <Comma>.
A single comma between arguments of multipleargument commands. It may optionally have white
space characters before and after the comma.
A white space character between command header
and argument. It may optionally consist of multiple
white space characters.
Command Message Elements
Header
Comma
WORKset:DEFAult SAMPLE,ON
Mnemonics
WORKset
:
DEFAult
Space
<Space>
Arguments
<name>
<comma>
<state>
Figure 4-1: Command Message Elements
Commands
Commands cause the transducer to perform a specific function or change one of
its settings. Commands have the structure:
<Header>[<Space><Argument>[<Comma><Argument>]...]
A command header is made up of one or more mnemonics arranged in a
hierarchical or tree structure. The first mnemonic is the base or root of the tree
and each subsequent mnemonic is a level or branch off the previous one.
Commands at a higher level in the tree may affect those at a lower level. The
leading colon (:) always returns you to the base of the command tree.
Queries
Queries cause the transducer to return information about its status or settings.
Queries have the structure:
<Header>?
<Header>?[<Space><Argument>[<Comma><Argument>]...]
Command Entry
Follow these general rules when entering commands:
• Commands can be entered in upper or lower case.
22
Series it2000 User’s Manual
• Any command can be preceded with white space characters. White space
characters include any combination of the ASCII control characters 00
through 09 and 0B through 20 hexadecimal (0 through 9 and 11 through 32
decimal).
• The transducer ignores commands consisting of any combination of white
space characters and line feeds.
Suffixes
Some mnemonics have a plural form. The mnemonic that is expressed in plural
form indicates that it represents more than one instance of a subsystem. This is
illustrated as follows:
TEST:INP5?
All suffixes have a default value of one and is used when the suffix is not specified.
Suffixes are enclosed in brackets in the command syntax descriptions to indicate
their optional inclusion. The brackets are not to be included in actual usage.
Command Termination
All commands are terminated with a carriage-return / line-feed combination. The
SCPI specification also allows for the use of a line-feed character only. The ASCII
codes for these command terminators are as follows:
ASCII Code
10
13
Table 4-3:
Key Stroke
Control + j
Control + m
Description
Line feed
Carriage return
ASCII Codes for Command Termination
Argument Usage
All arguments listed for a command are mandatory and must be specified by at
least a placeholder. Multiple arguments must be separated by a comma. String
arguments are case-sensitive unless otherwise noted. Those arguments that are
actually mnemonics themselves follow the same abbreviation options as
described above.
Argument Types
The argument of a command may be in one of several forms. The individual
descriptions of each command tell which argument types to use with that
command.
Numeric Arguments
Many transducer commands require numerical arguments. The syntax shows the
format that the transducer returns in response to a query. This is also the
preferred format when sending the command to the transducer though it will
accept any of the formats. This manual represents these arguments as follows:
Chapter 4: Using Commands
23
Symbol
<NR1>
<NR2>
<NR3>
Table 4-4:
Meaning
Signed integer value
Floating point value without an exponent
Floating point value with an exponent
Numeric Argument Types
The transducer will automatically force most numeric arguments to a valid
setting, either by rounding or truncating, when you input an invalid number
unless otherwise noted in the command description.
Quoted String Arguments
Some commands accept or return data in the form of a quoted string, which is
simply a group of ASCII characters enclosed by a double quote (“). For example:
“this is a quoted string”
Symbol
<QString>
Table 4-5:
Meaning
Quoted string value
Quoted String Argument Type
Follow these rules when you use quoted strings:
• A quoted string can include any character defined in the 7-bit ASCII character
set.
• Strings can have upper or lower case characters.
• A string cannot be terminated with the END message before the closing
delimiter.
• The maximum length of a quoted string returned from a query is 256
characters.
Block Arguments
Some transducer commands use a block argument form:
Symbol
<NZDig>
<Dig>
<DChar>
<Block>
Table 4-6:
Meaning
a non-zero digit character, in the range 1-9
A digit character, in the range 0-9
A character with the hex equivalent of 00 through FF
hexadecimal (0 through 255 decimal)
A block of data bytes, defined as:
<Block> ::=
{ #<NZDig><Dig>[<Dig>...][<DChar>...]
| #0[<DChar>...]<terminator> }
Block Argument Types
24
Series it2000 User’s Manual
<NZDig> specifies the number of <Dig> elements that follow. Taken together, the
<Dig> elements form a decimal integer that specifies how many <DChar>
elements follow.
Command Usage Rules
It is important to keep the following rules in mind when using the commands in
this reference guide:
1. Commands are case-insensitive.
2. All commands are terminated by a carriage-return / line-feed combination or a
linefeed.
3. All arguments are required.
4. Multiple arguments must be separated by a comma.
5. String arguments are case-sensitive unless they are a mnemonic.
Syntax Diagrams
The syntax diagrams in this manual use the following symbols and notation:
• Circles and ovals contain literal elements. Most elements must be sent
exactly as shown. The diagrams show command mnemonics in both upper
and lower case to distinguish between complete and abbreviated spellings.
These elements are not case sensitive and you can omit the lower case
portion of the mnemonic.
• Boxes contain the defined elements described earlier in this section, such as
<NR3> or <QString>.
• Elements are connected by arrows that show the allowed paths through the
diagram, and thus the orders in which you can send the elements. Parallel
paths show that you must take one and only one of the paths. A path around a
group of elements shows that those elements are optional. Loops show
elements that can be repeated.
Here are some examples of typical syntax diagrams:
C
H A P T E R
5
Command Reference
This chapter describes each of the commands used to configure and control the
it2000 pressure transducer. The command reference is broken down into several
groups of related functionality.
Contents
•
Measure Subsystem ......................................................................26
•
Test Commands ............................................................................28
•
System Commands .......................................................................30
26
Series it2000 User’s Manual
Measure Subsystem
The measure subsystem includes commands for initiating pressure and
temperature measurements.
MEAS:PRES
Returns a pressure measurement.
Syntax
MEAS:PRES?
MEAS
Remarks
:
PRES
?
The unit of measure is PSI.
Pressure output is fixed at 7 characters, with a first sign character followed by a
number with resolution based on a following table:
Example
Pressure range
Output format
0<=Range<5
5<=Range<50
50<=Range<500
500<=Range<5000
5000<=Range
±0.0000
±00.000
±000.00
±0000.0
±000000
meas:pres?
+14.135
Chapter 5: Command Reference
27
MEAS:TEMP
Returns a temperature measurement. This is the temperature of the pressure
sensing element which approximates that of the medium.
Syntax
MEAS:TEMP[channel]?
:
MEAS
Suffix
channel
Parameter
Result
none
Temperature from the on-chip temperature sensor
(default)
Temperature from the on-chip temperature sensor
Temperature from the RTD (optional)
0
1
Remarks
?
channel
TEMP
The unit of measure is degrees Fahrenheit.
Temperature output is fixed to the following format: ±000.00
Example
meas:temp?
+078.91
MEAS:ALL
Returns a pressure and temperature measurements.
Syntax
MEAS:ALL?
MEAS
:
ALL
?
Remarks
First value - pressure measurement, second value - on-chip temperature
measurement, third value - RTD temperature if there is one present.
Example
meas:all?
+078.50,+123.24
28
Series it2000 User’s Manual
Test Commands
Test commands allow to calibrate digital and analog output of the Series it2000
pressure transducer.
TEST:INP
Reads digital counts from selected channels.
Syntax
TEST:INP[channel]?
TEST
Suffix
INP
channel
?
channel
Possible values: 5
Parameter
5
Remarks
:
Result
Digital pressure and temperature counts, Board
temperature
Temperature measurement is the RTD temperature if there is one present,
otherwise it is the temperature from the on-chip temperature sensor.
Board temperature is the temperature from the on-chip temperature sensor
expressed in degrees Celcius.
Example
test:inp5?
11775507,41600,34.5
TEST:OUTPV
Sets analog voltage output corresponding to a given count.
Syntax
TEST:OUTPV count
TEST
Parameters
:
OUTPV
count
Possible values: 0-4095
<Space>
count
Chapter 5: Command Reference
The count is a value which will be send to the digital-to-analog converter to
set the analog output.
Remarks
This command is used to calibrate a transducer’s analog output during the
factory calibration process.
Example
test:outpv 2768
29
30
Series it2000 User’s Manual
System Commands
System commands includes those relating to identification, resetting the unit,
setting a timer.
SYST:VERS:FIRM
Returns the firmware version.
Syntax
SYST:VERS:FIRM?
SYST
Example
:
VERS
:
FIRM
?
syst:vers:firm?
217928F
*IDN
Returns the transducer part number, serial number and a revision.
Syntax
*IDN?
*IDN
Example
?
*idn?
STELLAR TECHNOLOGY INC,IT2000-15A-101,007713,0
*RST
Resets the it2000 to power-up status.
Syntax
*RST
*RST
Remarks
Executing this command is equivalent to executing a power-up sequence.
Example
*rst
Chapter 5: Command Reference
31
OFFSET:SET
Sets or returns the value for the input offset.
Syntax
OFFSET:SET offset
OFFSET:SET?
?
OFFSET
:
SET
<Space>
Parameters
value
offset
Real numeric value.
This signed value will be added to the digital output prior to displaying it.
Input offset will also affect the analog output.
Remarks
Input offset value is always in PSI.
Example
offset:set 3.4
offset:set?
3.40
SPAN:SET
Sets or returns the value for the span.
Syntax
SPAN:SET span
SPAN:SET?
?
SPAN
:
SET
<Space>
Parameters
value
span
Real numeric value from (0..150] interval.
The pressure transducer’s span will be set to the span% of the original value.
Remarks
Default value is 100.
Example
span:set 101
If the pressure transducer has 0-5 V output at 0-100 PSIG, after setting
span=101 analog output will be 0-5.05 V at 0-100 PSIG. Digital output will be
0-101 PSIG.
span:set?
101.00
32
Series it2000 User’s Manual
TURNDOWN:SET
Sets or returns the value for the turndown.
TURNDOWN:SET turndown
Syntax
TURNDOWN:SET?
?
TURNDOWN
:
SET
<Space>
Parameters
value
turndown
Real numeric value from [1..100] interval.
The pressure transducer’s pressure range will be set to the turndown% of the
original value.
Remarks
Default value is 100.
Example
turndown:set 50
If the pressure transducer has 0-5 V output at 0-200 PSIG, after setting
turndown=50 output will be 0-5 V at 0-100 PSIG. Digital pressure
measurement is not affected.
turndown:set?
50.000
TIMER:SET
Sets or returns timer settings. The it2000 will send pressure and temperature
readings over a RS-232 in the specified time interval.
TIMER:SET type, value
Syntax
TIMER:SET?
?
TIMER
:
SET
<Space>
Parameters
type
<comma>
type
This value specifies a time interval type.
Possible values: 0-3.
Parameter
0
1
2
3
Result
Interval measured in 1/128 of a second
Interval measured in seconds
Interval measured in minutes
Interval measured in hours
value
Chapter 5: Command Reference
value
Numeric value from 0 to 255.
This value determines a time interval in specified units of measure.
Remarks
Value set to 0 will stop the timer function.
In 1/128 mode not every setting will result in a proper response rate due to the
IT2000 performance limitations.
Example
timer:set 1, 100
timer:set?
sec,100
33
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Series it2000 User’s Manual
Index
Symbols
* (asterisk) 20
: (colon) 20, 21
A
Test Commands 28
TEST
INPut 28
OUTPV 28
Trigger Subsystem
TRIGger
PRESsure 32
Command Usage Rules 24
Commands and Query Structure 20
Commands 21
Queries 21
communication port 7, 17
Communication Setup 14
current loop 11
analog output 6, 7, 13, 16, 28, 29,
31
Analog Output Connections 13
Voltage Output 13
argument 21, 22, 23
Argument Types 22
Block Arguments 23
Numeric Arguments 22
Quoted String Arguments 23
ASCII (American Standard Code for
Information Interchange) 14, 20,
22, 23
B
Backus-Naur Form (BNF) 20
Basic Measurements 17
C
carriage-return 14, 22, 24
case
lower 21, 23, 24
upper 21, 23, 24
channel 28
Command Entry 21
Argument Usage 22
Command Termination 22
Suffixes 22
Command Reference 25
Input Subsystem
INPut
OFFSet
VALUE 31
Measure Subsystem 26
MEASure
ALL 27
PRESsure 26
TEMPerature 27
UNIT
PRESsure 27
System Commands 30
*IDN 30
*RST 30
SYSTem
VERSion
FIRMware 30
D
data acquisition 7
Description
Data Acquisition 7
digital
communications 6
count 28
output 6, 16, 28, 31
pressure 16, 17
temperature 16, 17
digital to analog converter 6, 7, 29
E
Electrical Connections 11
Electrical Receptical 11
F
firmware 30
foil strain gage 6
G
gain 20
L
line-feed 14, 22, 24
M
Mechanical Connection 10
Mounting Support 10
Orientation Sensitivity 10
message 20, 23
mnemonic 20, 21, 22, 24
O
offset
input 31
output
voltage 28
P
profile 7
R
RS-232 6, 7, 13, 14, 16, 19
S
Standard Commands for Programmable Instruments (SCPI) 6, 22
Standard Features
Accuracy 6
Analog Output 6
Calibration Software 7
Custom Configuration 7
Flexibility 6
Reliable Sensing Technology 6
RS-232 Output 7
SCPI Compliant 7
Support 7
Temperature 7
suffix 28
Syntax Diagrams 24
W
white space 21, 22
Wiring Harness 12
DC Power Connector 12
RS-232 Connector 13
36
Series it2000 User’s Guide
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