SRS Labs CTC100 Manuale utente

Version 2.1 (May 14, 2019)

User Manual

CTC100

Cryogenic Temperature Controller

CTC100 Programmable Temperature Controller

Certification

Stanford Research Systems certifies that this product met its published specificationsat the timeof shipment.

Warranty

This Stanford Research Systems productis warrantedagainst defects in materials and workmanship fora period of

one (1) year from the date ofshipment.

Service

For warranty service or repair, this product must be returned to a Stanford Research Systems authorized service

facility. Contact Stanford Research Systems or an authorized representative before returning this product for repair.

Information in this document is subject to change without notice.

Stanford Research Systems, Inc.

1290-C Reamwood Avenue

Sunnyvale, California 94089

Phone: (408) 744-9040

Fax: (408) 744-9049

www.thinkSRS.com

Printed in the USA

Contents i

CTC100 Programmable Temperature Controller

Contents

Safety and preparation for use................................................................................v

Specifications ...........................................................................................................vii

Introduction 1

Connecting the inputs and outputs ........................................................................3

Temperature sensor inputs ..................................................................................................... 3

100W heater outputs .............................................................................................................. 8

±10V analog I/O channels.....................................................................................................10

Relays, digital I/O, and virtual channels................................................................................10

Operation 13

Quick start tutorial .................................................................................................14

Turn the instrument on.......................................................................................................... 14

The Select screen...................................................................................................................14

Configure the sensor inputs................................................................................................... 14

If the sensor reading does not appear................................................................................... 15

Plot data.................................................................................................................................. 15

Test the outputs.....................................................................................................................16

Set the data logging rate.........................................................................................................16

Save data to and retrieve data from a USB memory device................................................ 17

Interface with a computer...................................................................................................... 17

Control a temperature........................................................................................................... 19

Acquiring and logging data ....................................................................................24

Input filters.............................................................................................................................. 24

Custom calibration tables...................................................................................................... 24

Virtual channels ...................................................................................................................... 26

Logging data to internal memory...........................................................................................26

Logging data to USB...............................................................................................................27

ADC sampling and logged data .............................................................................................27

Format of CTC100 log files ...................................................................................................28

The system fan ........................................................................................................29

Rack mounting the CTC100 ..................................................................................29

Using PID feedback.................................................................................................30

................................................................... 30

Basic concepts........................................................................................................................ 30

Manual tuning..........................................................................................................................31

Automatic tuning algorithms.................................................................................................. 34

Using the automatic tuner......................................................................................................37

Using alarms with PID feedback loops..................................................................................39

Front-panel controls ...............................................................................................40

USB logging indicator ............................................................................................................. 40

.............................................................................................................................. 40

.............................................................................................................. 40

....................................................................................................... 41

Contents ii

CTC100 Programmable Temperature Controller

...............................................................................................................41

................................................................................................................... 47

........................................................................................................................ 51

Firmware updates...................................................................................................74

Replacing the clock battery ...................................................................................75

Removing an I/O or CPU card ..............................................................................76

Remote programming 77

Connecting to the CTC100................................................................................................... 77

Communication, assembly, and run-time errors.................................................................. 80

Concurrent macros................................................................................................................ 80

Macro names.......................................................................................................................... 81

Command syntax ...................................................................................................................81

Remote instructions ...............................................................................................87

Miscellaneous instructions .....................................................................................................87

IEEE 488.2 Instructions........................................................................................................... 89

Program menu........................................................................................................................ 93

System setup........................................................................................................................... 96

Channel setup......................................................................................................................... 99

Error codes...........................................................................................................................109

Startup macros.....................................................................................................................110

Sam ple macros......................................................................................................111

Temperature profiles...........................................................................................................111

Control a feedback setpoint with an analog input..............................................................112

Show channels with tripped alarms on the Numeric screen .............................................112

Show the PID setpoint in a virtual channel .........................................................................113

Linearizing outputs when interfacing with external power supplies ..................................113

Control instrument functions with the digital IO lines .......................................................113

Drive a solid state relay with the digital IO lines.................................................................114

PC applications 119

PTCFileConverter ................................................................................................120

FileGrapher ............................................................................................................122

File menu...............................................................................................................................122

Edit menu..............................................................................................................................122

Process menu.......................................................................................................................124

Special menu.........................................................................................................................126

Command line and macro instructions...............................................................................127

Circuit description 131

CPU board............................................................................................................................131

Backplane..............................................................................................................................132

Front panel............................................................................................................................134

GPIB card..............................................................................................................................134

Sensor input cards................................................................................................................134

Heater driver cards..............................................................................................................135

Analog I/O card...................................................................................................................136

Digital I/O card....................................................................................................................137

Contents iii

CTC100 Programmable Temperature Controller

Parts List 139

Chassis (assembly 199)........................................................................................................139

CPU card (assembly 383)....................................................................................................140

Backplane (assembly 209)....................................................................................................148

Front panel (assembly 210) .................................................................................................150

GPIB option (assembly 289)................................................................................................152

2-channel thermistor/RTD/diode reader (assembly 310)................................................152

100W DC output card (assembly 206)..............................................................................157

Analog I/O card (assembly 297).........................................................................................160

Digital I/O card (assembly 298)..........................................................................................162

Schematics 165

Safety and Preparation for Use v

CTC100 Programmable Temperature Controller

Line voltage

The CTC100 operates from an88 to 264 VAC power source having a line frequency between 47

and 63 Hz.

Power entry module

A power entry module, labeled AC POWER onthe back panel of the CTC100, provides

connection to the power source and to a protective ground.

Power cord

The CTC100 package includes a detachable,three-wire power cord for connection to the power

source and protective ground.

The exposed metal parts of the box are connected to the power ground to protect against

electrical shock. Always use an outlet which has a properlyconnected protective ground. Consult

with an electrician if necessary.

Grounding

The back panel of the CTC100 has a chassis grounding lug. Connect a heavy duty ground wire,

#12AWG or larger, from the chassis ground lug directly to a facility earth ground to provide

additional protection against electrical shock.

Line fuse

Use a 10 A/250 V 3AB Slo-Blo fuse.

Operate only with covers in place

To avoid personal injury, do not remove the product covers or panels. Do not operate the

product withoutall covers andpanels inplace.

Serviceable parts

The CTC100 does not include any user serviceable parts inside. Refer service to a qualified

technician.

Specifications vii

CTC100 Programmable Temperature Controller

CTC100 temperature controller

Minimum sampling rate 1 Hz

Maximum sampling rate 50 or 60 Hz, depending on AC line frequency

Data logging rate 10 samples/second/channel 1 sample/hour/channel (can be set

independently for each channel or globally for all channels)

Display resolution 0.001 °C, °F, K, V, A, W, etc. if 1000 < displayed value < 1000;

6 significant figures otherwise

PID feedback auto-tuning Single step response or relay tuning with conservative, moderate, and

aggressive response targets

Display 320 × 240 pixel color touchscreen; numeric and graphical data displays.

Alarms Upper and lower temperaturelimits or rate-of-change limits can be set on each

channel.If exceeded, an audio alarm and a relay closure occur.

Computer interface USB, Ethernet, and RS-232; optional GPIB (IEEE488.2)

Power 10 A, 88 to 132 VAC or 176 to 264 VAC, 47 to 63 Hz or DC

Dimensions 8.5"× 5" × 16" (WHL)

Weight 13 lbs.

Warranty One years parts and labor on defects in material and workmanship.

Thermistor, diode, and RTD inputs

Inputs Four inputs for 2-wire or 4-wire thermistor, diode, or RTD

Connectors Two 9-pin D-sub sockets

RTDs and thermistors

Range 0 10, 30, 100, 300 ; 1, 3, 10, 30, 100, 300 k ; 2.5 M , or auto

Excitation current Low power High power

10 range 1 mA 3 mA

30 range 300 µA 3 mA

100 range 100 µA 2 mA

300 range 30 µA 1 mA

1 k range 10 µA 500 µA

3 k range 3 µA 200 µA

10 k range 1 µA 50 µA

30 k range 300 nA 50 µA

100 k range 100 nA 5 µA

300 k range 30 nA 5 µA

2.5 M range 1 µA 1 µA

Initial accuracy (AC current, at midrange)

10 range ±0.007 ±0.005

30 range ±0.03 ±0.005

100 range ±0.07 ±0.008

300 range ±0.25 ±0.015 (=±50 mK for Pt100 RTD at 25°C)

1 k range ±0.6 ±0.05

3 k range ±2 ±0.1

10 k range ±6 ±0.25

30 k range ±25 ±1

100 k range ±150 ±4

300 k range ±1 k ±13

2.5 M range ±3 k ±3 k

Typical drift due to temperature (at midrange)

10 range ±0.0002 /°C ±0.0001 /°C

Specifications viii

CTC100 Programmable Temperature Controller

30 range ±0.0004 /°C ±0.0001 /°C

100 range ±0.002 /°C ±0.0002 /°C

300 range ±0.004 /°C ±0.0004 /°C

1 k range ±0.01 /°C ±0.001 /°C

3 k range ±0.06 /°C ±0.003 /°C

10 k range ±0.2 /°C ±0.01 /°C

30 k range ±1 /°C ±0.02 /°C

100 k range ±3 /°C ±1 /°C

300 k range ±20 /°C ±2 /°C

2.5 M range ±30 /°C ±50 /°C

RMS noise (DC current, at midrange)

10 range 0.0003 0.0001

30 range 0.001 0.0001

100 range 0.002 0.0002

300 range 0.006 0.0003 ( = 1.4 mK for Pt100 RTD at 25°C)

1 k range 0.02 0.0007

3 k range 0.06 0.002

10 k range 0.2 0.007

30 k range 1.0 0.008

100 k range 6 0.12

300 k range 40 0.2

2.5 M range 10 10

Diodes

Excitation current 10 µA

Initial accuracy ± 100 ppm

Drift ±5 ppm/°C

Voltage input 0 2.5 V

Initial accuracy 10 µV + 0.01% of reading

Drift ±5 ppm/°C

RMS noise 3 µV

100W DC outputs

Output Two unipolar DC current sources

Connector #6 screw terminals. Accepts 12 22 AWG wire or #6 spade terminals up to

Max torque 9 in-lb.

Range 50 V 2A, 50V 0.6A, 50V 0.2A, 20V 2A, 20V 0.6A, 20V 0.2A

Output resolution 16 bit

Accuracy ±1 mA (2 A range)

±0.5 mA (0.6 A range)

±0.2 mA (0.2 A range)

Noise (rms), 25 load, 5 µA (2 A range)

DC 10 Hz 1.5 µA (0.6 A range)

0.5 µA (0.2 A range)

Analog I/O

Inputs/outputs 4 voltage I/O channels, independantly configurable as inputs or outputs

Connector 4 BNC jacks

Range ±10 V

Resolution 24-bit input, 16-bit output

ADC noise 30 µV RMS = 100 µV p-p (at 10 samples/s)

Altri manuali per CTC100

Indice

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