Lakeshore DRC-91 C User Manual

USER’S MANUAL

Model

Tem

per

DRC-91

at

u

re

Con

t

ro I ler

C

Obsolete Notice:

This manual describes an obsolete Lake Shore product This manual is a copy from our archives

and may not exactly match your instrument Lake Shore assumes no responsibility for this

manual matching your exact hardware revision or operational procedures. Lake Shore is not

responsible for any repairs made to the instrument based on information from this manual.

Methods

and apparatus disclosed
relationship whatsoever has existed
herein may

be

subject

to U S

poducts

of

this

material

Manual

at any

time

No

Patents existing

without notice

MAN-DRC-91

and

described herein have been developed

which

in

Lake

any way affects

or

Shore

shall

applied

not

or

mitigates proprietary rights

lor

Lake

be

liable

C

Lakeshore.

Lake Shore Cryotronics, Inc.

575

McCorkle Blvd.

Westerville, Ohio 43082-8888

Internet Addresses.

sales@ lakeshore com
service@ lakeshore com

Fax [phone]

Telephone [phone]

solely

on

company

funds

of

Lake

Shore

Cryotronics

lor

errors contained herein

Inc reserves

Shore Cryotronlcs

the

or

lor

incidental

of

right

Lake

Shore

to

add

or

consequential

USA

Cryotronlcs

Inc

improve

Inc

No

in

these

modify

damages in connection wth furnishing performance

government

developments

or

withdraw functions deslgn modifications or

or

Methods

other

contractual support

and apparatus

December,

disclosed

1987

Or

Or

use

SERIAL

SOFTWARE

NUMBER

INSTRUCTIO

MODEL

TEMPERATUR

Input Card

92

10-3

-6 6

Standard 3 volt Configuration

Volt Diode Configuration

9215-15 Standard 15 Nanofarad Capac

-150 150 Nanofarad Configuration

9220-3 Standard 3 volt Configuration

-6 6

-P2

-P3

-R1

9305 Thermocouple Input

Volt

100

1000

27

ohm

Configuration

ohm

platinum conversion modul

ohm

platinum conversion modu

Rh-Fe conversion module

Card

9317C Ultra-low (0.3K) Germanium input
9318C Germanium/Carbon Glass I

MANUA

Card

L

ut

B

No

Input

Card

Precision Option(s)

8223 RS-232C Interface 8001 8002
8225 Analog Output Interface

8229 Scanner Input Option

(0-

Output

W50

Power

W60

High Resolution Set Point

This manual applies directly to

16000

and

with Serial

N

nts

COPYRIGHT 1987, Lake Shore Cryotronics, Inc.

Westerville,

Ohio

U.S.A.

WARRANTY

Lake Shore Cryotronics, Inc., the manufacturer, warrants this product
to the owner for a period of

12

months from the date of shipment.
During the warranty period, under authorized return of instruments or
component
or at its option replace,

workmanship without charge to the

parts

to

Lake Shore freight prepaid, the company will repair,

any

part

found to

Owner

for parts, service

be

defective in material or

labor

or

associated customary shipping cost. Replacement or repaired parts will

be

warranted for only the unexpired portion of the original warranty.

All products are thoroughly tested and calibrated to published
specifications prior to shipment. Calibration Certifications are

offered for six month periods only.

updated, a re-certification service

Where such documentation must be

is

offered by

Lake

Shore

Cryotronics, Inc. at a reasonable cost.

LIMITATION

OF

WARRANTY

This warranty does not apply to defects resulting from improper or

inadequate maintenance, unauthorized modification or misuse, operation

outside of the environmental specifications for any product or part

or

buyer-supplied software or interfacing.
THIS

INCLUDING MERCHANTABILITY

ARE

WITH

INCIDENTAL

WARRANTY

IS IN LIEU

EXPRESSLY EXCLUDED.

RESPECT

TO

THIS

OR

CONSEQUENTIAL DAMAGES

PRODUCT

OF

ANY

OTHER

OR

FITNESS

THE

OWNER

SHALL

CERTIFICATION

WARRANTIES, EXPRESSED

FOR

A

PARTICULAR PURPOSE, WHICH

AGREES

BE

ARE

SET

THAT

FORTH

LAKE

IN

SHORE’S

THIS

EXPRESSLY EXCLUDED.

OR

IMPLIED,

LIABILITY

WARRANTY,

AND

Lake Shore Cryotronics, Inc. certifies that this product has been
inspected and tested

and that this product met

in

accordance with its published specifications

its published specifications at the time of

shipment.

The accuracy and calibration of this product at the the of shipment
are traceable to the United States National Bureau of Standards.

Copyright

12/87

TABLE OF CONTENTS

SECTION

1.1

1.2 DESCRIPTION

1.3 SPECIFICATIONS

1.4

SECTION

2.1 INTRODUCTION

2.2 INITIAL INSPECTION

2.3 PREPARATION

2.4

2.5 IEEE-488

2.6 OPTIONS

2.7

2.8

I

-

GENERAL INFORMATION

INTRODUCTION

.

.

OPTIONS

II

...

-

INSTALLATION

....

FOR

USE

2.3.1

2.3.2

2.3.3

2.3.4

2.3.5

2.3.6

2.3.7

2.3.8

2.3.9

REMOTE

Power

Power

Grounding

Bench

Rack

Sensor

J3

SENSOR

Heater

2.3.9.1

2.3.9.2

SENSOR

Mounting

Sensor

Requirements 2-1

Cord

Use

Input

ID

Power

MAX

Current or

ID

Connector

INTERFACE

..........

2.6.1

2.6.2

2.6.3

2.6.4 High Resolution

2.6.5

2.6.6

ENVIRONMENTAL

2.7.1 Operating

2.7.2 Humidity/Altitude

REPACKAGING

The

RS-232C Option

The

The

The
The

8229
8225

8001

W50

FOR

Scanner

Linear

and

and

REQUIREMENTS

SHIPMENT

.

....

Requirements

.......

......

Connections

Output MONITORS

Switches

.

,

...

......

HEATER

POWER

Power

Limit

Output

....

Display 2-5

.

Connector 2-5

.

8002

W60

Option

Analog

Set

Point .

Precision

Power

.

.

Option

Options

Output

Options

.

Temperature

.

,

.

1- 1

1-1
1-3

1-3

2-1
2-1

2-1

2-2
2-2
2-2

2-2

2-2

2-3

2-3

2-4
2-5

2-5

2-6
2-6

2-6

2-6

2-6

2-6

2-6
2-6

2-6
2-6
2-6

SECTION

3.1

3.2

3.3

3.4

3.5

3.6

INTRODUCTION.

INSTRUMENT

3.2.1

3.2.2

3.2.3

3.2.4

CURVE

PRECISION OPTIONS

3.4.1

3.4.2

3.4.3

CONTROL
CONTROLS

III

ENTRY

-

OPERATING INSTRUCTIONS

.........

CONFIGURATION

Input

Single

Dual

Old

Card

Input

Input

Version

Configurations 3-1

Card

Cards

Input

....

...

....

Cards

..........

.......

The

Model

The

Model

The

Model

FUNDAMENTALS.

AND

INDICATORS

8000

8001

6002-05

Precision

Precision

Precision

Option

Option

Option 3-2

.
.

3-1
3-1

3-1
3-1

3-1

3-1

3-2
3-2
3-2

3-2

3

-2

12/87

TABLE

OF

CONTENTS (Cont'd)

3.7

3.8

3.9

3.10

3.11

3.12

POWER ON..

3.7.1

3.7.2

DISPLAY SENSOR

3.8.1

3.8.2 8229

3.8.3

3.8.4

3.8.5

3.8.6

3.8.7

SENSOR

3.9.1

3.9.2

SENSOR

3.10.1

3.10.2

3.10.3

3.10.4

3.10.5

3.10.6

CONTROL

3.11.1

3.11.2

3.11.3

3.11.4

3.11.5

3.11.6

LOCAL/REMOTE

3.12.1

3.12.2

POWER UP
POWER-UP

DISPLAY SENSOR

SCAN

The

DISPLAY

3.8.5.1

3.8.5.2

3.8.5.3

3.8.5.4

3.8.5.5

Display

3.8.6.1

Filtering

CURVES

Standard

The

CURVE

SENSOR

3.10.1.1

SENSOR

SENSOR

Addition

Display

Sensor

BLOCK

SET

GAIN

RATE

RESET

HEATER

The

LOCAL

REMOTE

........

Scanner

Function

SCAN

Resolution

Precision

SELECTION

POINT

.

. .

HEATER

BLOCK

FRONT

Sequence

Status

Block

PANEL

.

....

Input

Conversion

.........

Dwell

AND

units

Sensor

Voltage

Resistance

Capacitance

Time

DISPLAY SENSOR

Select

Units

Units

........

Temperature

the

Display

......

Curves

.

Option

......

ID

Switch

Display

ID

Switch

No

ID

Switch

REMOTE

of

of

Curve

REMOTE

8229

Accessed

4

of

4
4

SENSOR

Scanner

assignment

.
.

.

%

.

-

POWER

.
.

RANGE

DESCRIPTION

.

.

option

......

Units

.....

Mode

...

.....

Units

Units

Display

Table

Open

Accessed

Closed

SENSOR

Closed

Position

...

...

Resolution

(0)

curve

(1)

ID

Present

(1)

ID

Present

Option

and

to

Sensor Position

.

Set

....

.........

-

........

-

.........

..........

Assigned

Curve

.....

.

3-10

.

3-10
3-10
3-10

3-10

3-10
3-10

3-11

3-11

3-11

3-11

3-11
3-11

3-2

3-2

3-4
3-4
3-4
3-4
3-4

3-4

3-5

3-5

3-5

3-5
3-5

3-6

3-6

3-6
3-7

3-7
3-7

3-7
3-8
3-8
3-8

3-9

3-9

3.13

3.14

SECTION

4-1. IEEE-488

4.2

4.3

REMOTE

HEATER

GENERAL

INTERFACE CAPABILITIES

SENSOR

CURRENT

IV

-

ID

LIMIT

REMOTE

INTERFACE

IEEE

OPERATION

SPECTFICATIONS

REAR

.

.

.

PANEL DESCRIPTION

.

.

.

.

-

*

.

-

-

AND

OPERATION

.........

.

3-13
3-13

4-1

4-1

4-2

TABLE

OF

CONTENTS (COnt'd)

4.4

4.5 IEEE-488

4.6

4.7

4.8 SELECTION

4.9

4.10

DRC-91C

4.4.1 Terminating Characters (delimiters) 4-3

4.4.2

4.4.3

4.5.1 Uniline Commands 4-5

4.5.2

4.5.3

4.5.4 Unaddress Commands 4-6

4.5.5

4.5.6 Talker and Listener Status

PROGRAMMING

4.6.1 Commands and Requests

INSTRUMENT

4.7.1

4.7.2 Interface Mode

4.7.3 Terminating Characters

4.7.4 Clear

4.7.5 The “W2” Data String

4.7.6

DISPLAY SENSOR, RESOLUTION (Table 4-7)

4.8.1

4.8.2 Units for

4.8.3 Display Sensor Selection

4.8.4 Resolution for

4.8.5

4.8.6

4.8.7

THE

4.9.1

4.9.2

4.9.3

4.9.4

4.9.5

4.9.6

4.9.7

4.9.8 The “W3” Data String

THE

4.10.1

4.10.2 Setting the Dwell

4.10.3 Selecting the Scanner channel

4.10.4

4.10.5

4.10.6

IEEE-488

Talker and/or Listener Configuratior 4-3

The

BUS

Universal Commands 4-5

Addressed Commands

Device-Dependent Commands

EO1 Status - The ZN1 Command

4.7.2.1

4.7.2.2 Remote

4.7.2.3

The

Units

The

The F3AN1 and
The A and

The

The

The

CONTROL

The

The

Setting

Setting the RESET (Integral) - The
Setting the

Heater Range - The R
NOTE: The Return to

SCANNER

SCAN

The

The
Enabling
Holding the
The

ADDRESS

IEEE-488

COMMANDS

SWITCH

INTERFACE

.

.

bus

......

address

.....

.....

INSTRUCTIONS

SETUP

COMMANDS

Local

Local

..........

.......

AND

REQUESTS

....

-

The

MN1

Command .

...........

...........

Lockout

.......

-

The TN1 command

......................

...............

“WI”

OF

SET

F1AC1

AC1C2

Sensor

“W1”

COMMANDS

Set Point Value - The S Command

“WP”

INPUT

YAN1N2N3

YCAC1

“WY”

Data String
POINT

for

Set point - The FOC1 Command

A

and B Inputs

and

and BC1C2 Commands

Data String

F1BC1 Commands

F3BN1

B

SENSOR

ID on Return to Local . .

............

Request

the

Programming

GAIN

RATE

CARD

and

Command

the

Scan

Scan

Data String

...............

UNITS,

INPUT

UNITS,

-

...........

-

The F2C1N1 Command

A

and

B

Inputs

Comands

ID Information

........

Data

(Proportional) - The P Command

(Derivative) - The

........

Instructions. 4-16

Time

YBON2N3 Commands

Function - The

string

Command

Local

.....

-

................

Function

...............

-

....

....

...........

.

. . 4-16

-

-

The

.

...

.

...

.....

..........

......

.

.

.

-

.
.
.
.

.

.

I

Command . .

D

Command . . 4-16

........

YS

Command ... 4-16

YH

Command

.

.

,

.

.

4-3

4-5

4-5

4-5

4-6

4-6

4-7
4-8

4-8
4-8
4-8

4-8
4-10
4-10

4-10
4-10
4-10

4-10

4-10

4-10

4-11

4-11
4-11
4-11

4-11

4-13

4-13

4-13
4-14
4-15
4-16

4-16

4-16

4-16

4-16

4-16
4-17

4-17

12/87

TABLE

OF

CONTENTS

(Cont'd)

4.11

4.12 Command

4.13

4.14

THE

SERVICE

AND

THE

4.11.1

4.11.2

4.11.3

4.11.4

4.12.1 Output

4.12.2

Sample

4.13.1

4.13.2

4.13.3

4.13.4

SENSOR

4.14.1

4.14.2

4.14.3

4.14.4

4.14.5

4.14.6

4.14.7

REQUEST,

STATUS
The
The

4.11.2.1

4.11.2.2

4.11.2.3

4.11.2.4

4.11.2.5

The

4.11.3.1

4.11.3.2

4.11.3.3

4.11.3.4

4.11.3.5 Examples

4.11.3.6

The

Operations

The

Programming

HP860

National

National

HP86B

CURVE

The

The

The

The

The

The

The

REGISTER

Service

Status

The

Status

“WQ”

Data

"WO"

Keyboard

Bus

PROGRAMMING

XDT

Command

XDN1N2

WA

Command

XCN1N2 Command
XEN1N2
XKN1N2*
XAC1C2=N1N2*

STATUS

Request

Register

Status

Display
Status

Control Channel Limit

Status

Display

Status

When

Status

Display

Status

The

Status

Display

Status

Overload/Error

Status

Data

operating

Register

Control Channel

String

......

Statemants

Data

String

......

Instruments

Instruments

Comands

Command

Command

Command

REGISTER,

MASK

...............

...............

and

Reports

and

Report

Report

Sensor

Report

Mask

Register

and

Register

Register

Sensor

Register

for

Register

Status

0

Control

2

3

Channel

5

without

Control

Channel Change Enable

Indicator

setting

.
.

Interactive

IBM

QUICK

Program

INSTRUCTIONS

.
.

am

XBC1C2=N1N2* Commands

and

Data

STATUS

Reports

1

-

REPORTS,

Ready

......

.....

-

........

-

Change

-Overload

-

The

Mask

Mask

Mask

Mask

Mask

Example

QC1C2 Command

Bits

Data

Bit 2

Limit

Bit

Bit

Mask

at

Program

BASIC

Error

the

0

Ready Enables

Enable

3

5

Enable

Power

.........

IBM

............

..........

......

Indicator

Service

Request

...

and

1

-

-

....

-

-

.....

........

up

........

Example

....

...

....

.

. .

4-17

4-18

4-18

4-18

4-18

4-19

4-19
4-19
4-19

4-20

4-20

4-20

4-20

4-21
4-21
4-23
4-23
4-23
4-23

4-24
4-24
4-25
4-25
4-26
4-27
4-27
4-27

4-30

4-30

4-31

4-31

4-31

SECTION

5.1

5.2

5.3

5.4

5.5

5.6

12/87

INTRODUCTION

GENERAL MAINTENANCE

FUSE

LINE

PERFORMANCE VERIFICATION

5.5.1

5.5.2
CALIBRATION

5.6.1

5.6.2

V

-

MAINTENANCE

REPLACEMENT

VOLTAGE

Performance

Performance

Input

Set

Point

...............

...........

.............

SELECTION

..........

.........

Verification

Verification

...............

Card

Calibration

Voltage

Calibration

connector

procedure

......

.

.

5-1

5-1

5-

5-1

5-2

5-2

5-2

5-2

5-2
5-2

1

TABLE

OF

CONTENTS

(Cont'd)

5.6.3

5.6.4

5.7

SECTION

APPENDIX

APPENDIX

APPENDIX

TROUBLESHOOTING

VI

A

B

C

Calibration

Calibration

. . .

-

ACCESSORIES,

-

Standard

-

Sensor

-

Error

Curve

Code

of

GAIN,

of

Power

.

INPUT

Curve

Character

Summary

RATE

Output

.

.

. . . .

Data

and

CARDS

RESET

.

.

,

.

.

. . .

AND

Information

OPTIONS

.

.

.

.

.

.

-

-

. . .

. . .

. . .

. . .

.

.

5-3

5-3

5-4

LIST

OF

TABLES AND ILLUSTRATIONS

SECTION

Table

SECTION

Table 2-1.
Figure 2-1.
Table

Figure

Table

Figure

Table 2-4,
Table 2-5.

SECTION

Figure

Table 3-1,
Table 3-2.
Table
Table

Figure

Figure

Table

1-1.

2-2,

2-2.

2-3.

2-3.

3-1.

3-3.

3-4-

3-3.

3-2. DRC-91C

3-5.

I

-

GENERAL INFORMATION

Specifications,

II

-

INST-TION

Line

Typical

INPUT

Sensor

J3

SENSOR
SENSOR

REEMOTE

111

DRC-91C

SYSTEM

Standard

Sensor

Position

SENSOR
Reset

Pin

Voltage

Connections

Connections

MONITORS

ID

SENSOR

-

OPERATING

RESOLUTION

Curve

ID

and

Assignments

Model

Selection

Rack Configuration

DRC-91C Temperature

for

J1

.................

Connections.

Definitions

ID

Standard

ID

INSTRUCTIONS

Temperature

Curve

#

versus

Switch

Rate

Temperature

Information

Table

Ties

for

Connector

VERSUS

Information

Curve

4

................

Curve

Controller

#

=

1

for

91C

Controller - Rear

the

55

Controller

. .

...............

.............

INPUT A and

J2

INPUT

B

.

.

..............

Address

Assignments.

SENSOR SENSITIVITY

..........

.......

-

Front

Panel.

....

.....

.............

-

Precision

Correlation

Option

Table

Table

-

...............

.............

REMOTE

Panel

SENSOR

ID

.....

Connector

1-4

2-1

2-2

2-2

2-2

2-3

2-3

2-4

2-4

3-3

3-5

3-6

3-7

3-8

3

-9

3-10

3-11

SECTION

Table 4-1.

Figure

Table

Table

Table 4-4. DRC-91C
Table 4-5. DRC-9lC
Table
Table
Table 4-8. DRC-91C Output Request
Table
Table 4-10, DRC-91C Command/Request

Table 4-11, DRC-9lC Command/Request
Table 4-13, DRC-91C Command/Request

Figure

Table 4-14, Commands
Table 4-15. DRC-91C Output
Table 4-16,
Table 4-17.
Table 4-18.
Table

IV

-

REMOTE OPERATION

Interface

4-1. ZEEE-488

4-2,

4-3.

4-6.

4-7.

4-9.

4-2. DRC-91C

4-19.

Allowable Address

IEEE-488

DRC-91C
DRC-91C Comand

DRC-91C Command/Request

the

Status

Conversion

Control

Sensor
Sensor

XDN1N2

Functions.

Address

BUS

Program

Summary

Interface

Register

SRQ

to

Curve

Curve

Sensor

Commands

Parameters.

MASK

Fix

Commands

Information

Curve

of

Raw

................

Switch

Codes

................

Code Summary

of

Output Requests.

Setup

Summary

Mask.

and

the

Data

Units

................

Status

Status

Statements

and

output

for

for

the

the

DRC-91C
DRC-9lC

-

Instrument

.

. . . , .

.......

Setup

.

.........

Commands

for

Instrument

Sumnary

Summary

Summary

and

for

for
for

Request

Setup.

Instrument

Setpoint

Status

.

Setup

Setup.

. 4-12

...............

Summary

Sumnary

Register

Byte

for

for

Format

Scanner

.

Mask

.....

.

.

.

.

......

............

Description

Table Output

Data

Format

for

.

the

.

.

Format

.

.

XC

Command

.

. . .

.

. . .

.

.)

. .

.

.

.

.

4-2

. 4-3

4-4
4-6

.

.

.

.

4-7
4-8
4-9

4-13

4-14

4-15
4-17

4-21

. 4-22

4-22
4-24

.

4-28
4-29

.

4-29

. 4-32

.

12/87

Model

DRc-91c

Section

I

SECTION

I

GENERAL INFORMATION

1.1

INTRODUCTION

option selected, the DRC-91C
handles silicon (9210-3 or

9220-3)

The information contained in this or the patented Gallium-Aluminum­operations manual pertains to the Arsenide

(9210-6

or

9220-6)

diodes,

installation, operation, remote platinum or rhodium-iron resistors

programming, options and acces- (9220 series), germanium or carbon

sories for the Lake Shore Cryotro- glass resistors (9317C, 9318c),

or

nics, Inc. Model DRC-91C Tempera- capacitance sensors (9215).
ture Controller. This manual also
contains troubleshooting and With or without the
calibration procedures, schematics, Card, the DRC-91C can

8229

be

Scanner

set to

component layouts and a complete scan automatically with an in-

1

to

parts list. dividual dwell time of

99

seconds per channel or stepped to

This section contains general any available input and held there.

information for the Lake Shore Setting the dwell time to zero
Cryotronics, Inc. DRC-91C Tempera- causes a particular channel to be
ture Controller. Included is an skipped. If all dwell times are

instrument description, specifica- zero, the instrument stays on the
tions, instrument identification, channel selected.
option and accessory information.

The DRC-91C gives a direct reading

1.2

DESCRIPTION

The DRC-91C Temperature Controller All

in temperature when used with any

DT-470

Series Temperature Sensor.

MI-470

Sensors follow the same

is a microprocessor based instru- temperature response curve. Four
ment which provides true analog bands

control. It
multiple sensor inputs

ing temperature with up to

of resolution

sensor units (volts,

is

capable

in

K,

of scanning available. Refer to DT-470

and

°C

or

display-

5

digits

°F or Diode sensor voltages are digitized

ohms

or to a resolution of 100 microvolts

technical data for details.

of

tracking accuracy are

nanofarads) to five digits. with full scale dependent on input

card configuration. The tempera-

The DRC-91C

1

or 2 input cards. When
cards are
different to allow

can

used,

be

used with either ture display has a resolution

two

input capability of

these cards can be kelvin and

two

separate kelvin.

0.01

0.001

kelvin above

kelvin below

100
100

types of sensors to be used with

the controller. For greater precision individual

sensor calibrations can

The dual sensor input with the dated with the

8001

be

accommo-

Precision

optional 8229 Scanner Conversion Calibration Option which programs

Card

the DRC-91C to up to
sensors.

expand the input capability of the instrument with calibration

6

input data for a specific Sensor. The

Depending

on the input algorithm within the instrument

COPYRIGHT

1/88

LSCI

1-1

Section

I

Model

DRC-91c

interpolates between data points to for a rhodium-iron to read correct-

an interpolation accuracy which ly in temperature.
exceeds

0.01K

over the entire

temperature range of the Precision The Model DRC-91C with the 9318C
option- The 16 bit analOg-tO- germanium/carbon-glass input card

digital converter is accurate to results

the

plus or minus
bit, which for the

least significant

470

series sensors, a precision option is

below

in

the most accurate system

50K

in temperature.

For both

sensor results in an uncertainty of required to read in temperature.

1mK

below

28K

and

45mK

above

40K

Near

4K,

the overall accuracy of
with a transitional region between the system, including the calibra­these

at temperatures below

overall system accuracy, the
the instrument accuracy (11mK)
that of the calibration itself the order of

two

temperatures. Therefore, tion accuracy, the software

28K,

the interpolation accuracy and the

sum

of calculation of the resistance

and

results in

an

overall accuracy on

10mK.

(Lake Shore calibrations are

typically better than

is

±

this region)

28K,

system accuracy gradually can be changed or upgraded

0.03K.

20mK

within These input option cards are easily

Above installed by the user: thus, units

to

moderates to a typical value of satisfy changing requirements.

-

+75mK above

Shore Cryotronics, Inc. Low The ample

40K.

See the Lake

memory

space provided in
Temperature Calibration Service the DRC-91C allows several response
brochure for additional discussion curves to be stored in the instru-

of

calibration accuracy. ment. Depending on the complexity

of the
The Model DRC-91C can also be used programmed into the unit.
with the
handles both diodes

9220

input

card

and

which panel DIP switch (Sensor ID) is

positive used to select the particular

curves,

up to 25 can be

A

rear-

temperature coefficient metallic sensor response curve for each
resistors.

,

i.

e.

,

platinum or input.

rhodium-iron resistors. The DIN

is

curve

instrument and

automatically unless a positive

standard within the The data for calibrated sensors can

is

called up be stored in the instrument as an

8001

Precision Option or by the

temperature coefficient precision customer via the IEEE-488 inter-

option is selected by the SENSOR ID face. These curves can contain up

for

that input. The accuracy of to

the reading

is

dictated by the points. With the standard preci-

sensor and its conformity to the sion option format of

DIN

curve. The tolerance

is

devices

given on the technical tion line, up to twenty curves can

on

these points and an

data sheet for the Lake Shore

be

stored.

99

sensor temperature data

18

character informa-

31

data

PLATINUM RTDs. The combined
accuracy of the instrument and a Although data points are stored as
calibrated resistor with a preci- a table, the interpolation al­sion option is on the order of

over

‘(above

the useful range of the sensor equivalent of a high order Cheby-

40K

for the platinum). Note chev polynomial calculation in the

40mK

gorithm used results in the

that a precision option is required converting of the input voltage

1-2

COPYRIGHT

1/88

LSCI

Model

DRC-91c

Section

I

(or resistance) to temperature. Heater power output of the DRC-91c
This
etary algorithm developed at Lake of 25 watts when a 25
Shore Cryotronics. used.

An averaging algorithm can be percentage

is

done by means of a propri- Temperature Controller is a maximum

ohm

heater is

A

digital meter on the front

panel displays the output as

of

output range select-

a

selected to average up to ten ed. Thus, the user can convenient­temperature readings. This mode ly monitor power applied to his
eliminates noise within the system system.

To

accommodate systems
analogous to averaging with a which require lower heater power,
digital voltmeter. This averaging the
mode can be deselected by switch

2

tenuated in three steps of a decade

maximum

output can

be

at-

of the SENSOR ID dip switch on the each. When greater output power is
back panel for a given input if the required, the optional W50 and
customer prefers not to average output stages can provide either

readings. or

60

watts respectively.

W60

50

The control set-point selection is

An

IEEE-488 interface is standard
made via increment and decrement in the DRC-91C. This interface can
buttons on the front panel. The be used to remotely control

all

display above the buttons indicates front-panel functions. When two
the set-point value. The set-point input cards are used, data from
units may be selected independently both inputs is available via the

from the display sensor units.

The standard set point temperature

interface.

1.3

SPECIFICATIONS

can be set to 0.1 degree. This
temperature is converted to an Instrument specifications are

equivalent voltage with a resolu- listed in Table

of

tion
volts full

100 microvolts out of

scale.

The optional standards

High Resolution Set Point

expands

3

specifications are the performance

or

limits against which

the instrument

is

tested.

1.1.

These

the set point resolution to 0.01
kelvin

above

100K and 0.001 kelvin

1.4

OPTIONS

below 100K. the equivalent voltage

is expanded to 25 microvolts out of The options for the DRC-91C

3

volts full scale. This results Controller are listed in Section

in a setability of approximately

VI.

0.01 kelvin above 40K and 0.001
kelvin below 28K for the

DT-470

Three option

ports

are designed

series sensors. into the DRC-91C. The options are

field installable by the user.
The control section of the DRC-91C
provides three-term temperature 822x-series options can be factory
control. Proportional

integral

(RATE)

(RESET)

and

are individually tuned via 8223 RS-232C Interface Option

front-panel potentiometers. The operates similar to the

gain, reset and rate are

(GAIN),

installed in the DRC-91C

or

field-

derivative installed at a later time. The

IEEE-488

in

a interface. The Model 8225

Analog

nominal log per cent. Output option is available to

provide a linearized analog output

COPYRIGHT

1/88

LSCI 1-3

Section

of

I

10mV/K independent of the The Model

8229

Model DRC-91c

Scanner Option

display temperature units. If the provides four additional channels
display is in sensor units, the of
output for diodes is lV/V; for 100 The A input

ohm

platinum, 10mV/ohm; for 1000 additional inputs designated

ohm

platinum, 1mV/ohm; for rhodium- with the selection indicated on the

sensor

input to the

is

channel

“A”

A0

with the

input.

A1-A4

iron, 100m/ohm; and for capaci- display.
tance units, 100mV/nF and 10mV/nF.

Table 1.1.

Input Characteristics: temperature in

Specifications, Model

DRC-91C

Temperature

K,

Controller

°C, or

°F

shown

with annunciators.

Inputs:

8229

provides for four additional 0.001K below 100K,
channels of Sensor Input. Display

Two

Sensor Inputs. The

Scanner Conversion Option Resolution: Display resolution

(0.0001K

below

0.01K

10K

above 100K

for 9317C

is

sensor can be selected from front Resistance Sensor Input Card).
panel or interface, or display can Resolution can be user-limited to
be set to scan between sensor 1K, 0.1K or 0.01K. Same resolution

inputs. Dwell the per channel can considerations apply for °C,

be set independently from 0 (skip) Sensor Units. Changes made

to

99

seconds. Input character- front

panel

keys or over interface.

°F

and

by

istics are a function of Sensor

Input Option Installed. The DRC-

Temperature

Accuracy:

Dependent on
91C can accommodate two input Sensor Input Card and Sensor. See
options which allows the
and the
their

B

input to each be assigned

own

input

card.

concurrent use of different sensors

A

input Input Options available.

This allows

Temperature

Range:

Dependent of

Sensor Input Card and Sensor.

dependent on the application.

Sensors:

Temperature

Ordered Separately. DRC-

Control:

91C will handle all types of Set Point: Button increment
diodes; germanium, carbon glass, (either fast or

slow)

of set-point
carbon, etc. negative temperature in set-point units.
coefficient resistors, thermistors;
platinum, rhodium-iron, etc.

Set

Point

Resolution: Selection in
metallic resistors and ther- kelvin, Celsius, fahrenheit or
mocouples as well as capacitance Sensor Units. Temperature to 0.1

thermometers with proper choice of in corresponding units; in Sensor

input option cards. See the Lake Units, 0.1mV in voltage, 0.01

ohms

Shore Cryotronics, Inc. Sensor but limited to five digits in
catalog for details on the above resistance and

15

Sensors. of

nanofarads

0.001

nanofarads out

(0.01

nanofarads

out of 150 nanofarads for second

Display

Readout:

scale) in capacitance. May also be

set over the interface.

Display: 5-digit

LED

Display of

Sensor reading in Sensor Units

(Volts,

Ohms

or Nanofarads) or

1-4

COPYRIGHT

1/88 LSCI

Model

DRC-91c

Section

I

Typical Controllability: Dependent is 0.457771 for
on Sensor,

resultant Sensor “gain”,
sensitivity. Typically better than (-P2, -P3,

its

temperature and the For 9220 Option positive tempera-

i.

e.

,

ture coefficient configurations

-R1),

0.001K in a properly designed voltage output times
system below 30K and

10mK

above 30K outputs for 9210-6 and

-6

configurations.

buffer is sensor

-10.

Buffered

9220-6

are
using a Diode Sensor. But, for multiplied by 0.457771. For 9215,
example, a thermistor, due to its signal is proportional to capaci-

large sensitivity,

may

result in

a

tance value: for 9317C or 9318C,
controllability approaching 0.5mK monitor not of use.
above 200K over a narrow tempera-

ture range in certain systems and a
germanium below

0.

1mK

in another system. non-Lagrangian calculations.

10K

may control to than 1 second to rated accuracy for

Response

time

(electronics):

Less

Lagrangian curves result in update

Control

(GAIN),

derivative

Modes:

integral

(RATE).

panel knobs or with interface.

Heater

(1A,

output:

25V) standard. Four output control of set-point, gain, rate,

Proportional times between one and two seconds.

(RESET)

and Three readings

on

channel change or

Set via front- range change to reach rated

accuracy.

Up to 25 watts

IEEE-488

Interface: Allows remote

ranges can be selected either from reset, units and heater power

front-panel or interface and range. Provides output of display

provide approximate decade step

reductions of
Optional

maximum

50

or

power output. front panel functions (except power

60

watt outputs on/off and Display Sensor Selec­available. Rear panel maximum tion). Allows input
current limit for

MAX

scale. for calibrated sensors.

in

units chosen, units and all

of

curve data

Heater

continuously shows heater current 102mm high
or power output as a percentage of 4in.

range with a resolution of
control

output

Sensor:

Monitor:

LED display Dimensions, Weight:

x

x

13in.) Style

1%.

Either Sensor

package. Net weight 8kg (17 1b.)

Rwer:

90-110, 105-125, or 210-250

330mm

432mm

wide x

deep (17in. x

L,

full-rack

.

Input (designated from rear panel). VAC (selected via rear panel with

General:

Sensor

Voltage

Monitor:

instrument off), 50 or

watts.

For 9210 Accessories Supplied: Mating

60

Hz,

75

and 9220 diode Option configura- connector for sensor/monitor
tions (-3,

-6),

buffered output of connector, instruction manual.

diode sensor voltage. Multiplier

COPYRIGHT

1/88

LSCI

1-5

Model

DRC-91c

section

II

SECTION

II

INSTALLATION

2.1

INTRODUCTION

Inc. of such filings. In case

parts shortages, advise LSCI

of

im-

This Section contains information mediately. LSCI can not be respon­and instructions pertaining to sible for any missing parts unless

instrument set-up. Included are notified within
inspection procedures, power and ment. The standard Lake Shore

grounding requirements, environ- Cryotronics Warranty
mental information, bench and rack

the first page of this manual.

60

days of

is

ship-

given

on

mounting instructions, a descrip­tion of interface connections, and

2.3

PREPARATION

FOR

USE

repackaging instructions.

ts

2.2

INITIAL

INSPECTION

2.3.1

Power

Requiremen

The Model DRC-91C requires a power

This instrument was electrically, source of
mechanically and functionally in-

(+5%,

100,

-10%),

120, 220

50

to

60

or

Hz

240

VAC

single
spected prior to shipment. It phase.
should be free from mechanical

damage, and in perfect working CAUTION
order upon receipt. To confirm

this, the instrument should be
visually inspected for damage and
tested electrically to detect any
concealed damage upon receipt.

Be
sure to inventory all components
supplied before discarding any

If

shipping materials.

there is

damage to the instrument in tran-

sit,

be

sure to file appropriate

Verify that the AC Line Voltage

Selection Wheel (Figure
Key

1)

located on the rear

3-2,

panel of the Model DRC-91C is

to

set

used (Table

the AC voltage to be

2-1)

and that the

proper fuse is installed before

inserting the power cord and

turning on the instrument.

claims promptly with the carrier,
and/or insurance company. Please
advise Lake Shore Cryotronics,

COPYRIGHT

12/87

Table

LSCI

2-1.

Line Voltage Selection

2-1

section

II

Model

DRC-91C

Figure

2.3.2

A

for

Power

Cord

three-prong detachable power cord The

120

VAC

operation which mates pin input connectors for diode and

2-1.

Typical

Rack

2.3.6

Configuration

Sensor

DRC-91C

Input

has two rear panel

Connections

5-

with the rear panel UL/IEC/ICEE resistance sensors. The lead

standard plug is included with the connection definition for the sen-

instrument. sor(s) is given in Table

2.3.3

To

Grounding

Requirements

protect operating personnel, the

shown in Figure

Figure

2-2.

2-2.

Sensor

Connections

2-2

and is

National Electrical Manufacturer's
Association

(NEMA)

recommends, and

some local codes require, instru­ment panels and cabinets be ground­ed. This instrument is equipped

with a three-conductor power cable
which, when plugged into

an

appro-

priate receptacle, grounds the

instrument.

2.3.4

The

Bench

DRC-91C

Use

is shipped with plastic

“feet” and a tilt stand installed

and is ready for use as a bench

instrument. The front of the in-

strument may

be

elevated for con-

venient operation and viewing by

extending the tilt stand.

2.3.5

The

standard

Rack Mounting

DRC-91C

19

can

inch

be

installed in a

instrument rack by

using the optional RM-3F or RM-3F-

H

rack mounting kit.

3F-H

Figure

2-2

kit installation is shown in

2-1.

A

typical

RM-

COPYRIGHT

12/87

LSCI

Model

DRC-91C

Section

II

Connections for capacitance sensors is Phosphor Bronze with a Fomvar
and thermocouples are made through insulation and Butryral bonding
alternate connectors. Refer to the between the four leads. Color cod­appropriate input card section for ing is red, green, clear and blue

sensor connections.

on the four leads which makes it

extremely easy to determine one
The four lead connection (a) is wire from another.
required for a four lead sensor.

The use

of

a four wire connection

2.3.7

J3

Sensor

Output

MONITORS

(Figure 2-2b) is highly recommended Buffered voltage outputs for both

for two lead resistive elements and Sensor Input
diodes to avoid introducing

IR

on the J3 connector on the back

A

and B are available

drops in the voltage sensing pair panel of the instrument. The volt-

which translates into a temperature age from the Model
measurement error. Output Option

is

connector also. The connector

An

alternate two line wiring method assignments are given in Table

(Terminals

her, B and

A

and

E

shorted toget-

D

shorted) may be used

Table

2-3. 53

MONITORS

8225

Analog

present on this

pin

2-3.

Connections

for the MI-470 and TG-120 series
diodes in less critical applica­tions where lead resistance is
small

be

and

small readout errors can

tolerated (c) . Measurement er­rors due to lead resistance for a
two lead hook-up can

=

using; §T

IR/[dV/dT] where I is

10 microamperes,

R

be

calculated

is

the total

lead resistance; dV/dT is the diode

is

sensitivity and §T
ment error. For example, R

=

with dV/dT

2.5 mV/K results in a
temperature error
wire connections are not recom- The
mended for other sensor types.

Table

for

J1

2-2.

Input

INPUT

A

and

the measure-

of

1 kelvin.

connections

J2

Input

=

250

B

Two

2.3.8

switches determine slope
capacitance input card,

SENSOR

A

SENSOR

ID

Switches

ID

and

B

SENSOR

for

if

present,

ID

a 9215

activate or deactivate digital

filtering and enables thermal aver­aging on the 9317C or 9318C resis­tance input card when present or

ice-point compensation when a

9305

thermocouple input card is present.

Switch
Switches

4

determines whether

5-8

select a stored curve

directly or a curve via the psi­tion correlation table, i.e.,

a

table of position versus curve num­ber for non-thermocouple inputs.

The Lake Shore Cryotronics, Inc. Switches 5-8 define the thermo-

QUAD-LEAD™

36

Gauge cryogenic wire couple type when a 9305 thermo­is ideal for connections to the couple input card is present. The
sensor since the four leads are

together and color-coded. The wire Figure

run

switch information is described

2-3.

in

COPYRIGHT

12/87

LSCI

2-3

section

II

Model

DRC-91c

Table

the

2-4

address

indicates the position of

switches to

select

standard curves stored within

instrument. Information on

cision Option

Appendix

Figure

B.

2-3.

Curves

SENSOR

is

given in and

ID

Definitions

the

Pre-

See

SECTION

tion

on

operation of

J5

REMOTE

Curve

has

Curve

kelvin.

must

read

rear

If

the

10

a

set

04

be

the

panel

a thermocouple

SENSOR

III

for more infoma-

sensor selection and

the

SENSOR

SENSOR

is

given

point

limit

has an upper

Switch

0

4

Or

for the instrument to

ID

ID.

twice;

of 325K

limit

me

SENSOR

switches

Note that

Curve

curve directly from

SENSOR

ID

ID

hardware.

card

switches

is

select

present,

the

02

and

of 475

ID,

the

the

appropriate thermocouple table

instead

the

diode

or platinum

of

curves.

2.3.9

The

electrically isolated

sensor(s) ground(s) to preclude

Heater

heater

Power

output leads should

from

be

the

the

possibility of any of the heater

current affecting

the

sensor input
signal. The heater leads should
not

run

coincident
leads due to
capacitive pick-up between
sets

of leads.
close proximity, they should
wound

leads

so

as to cross

at

ninety

the

degrees

with

the

sensor

possibility of

the

If

they are

the

sensor

if at all

two

in

be

possible.

Table

2-4.

SENSOR

curve

ID

stardard

Address

The heater output

is

a current

drive and does not have to

fused. The
power a
heater output.
tance

is

power corresponds to

resistance,

watts.

used.

is

allow

12.5

TWO

(W50

Since the compliance voltage

25

volts;

a

watts

optional output power stages

and

respectively

DRC-91C.

ampere

and

DRC-91C

25

ohm

used, the

i.e.,

A

larger

a

maxim

[

(25) 2/50].

W60)

are

The

50

is

designed

heater

If

a

for maximum

smaller

maximum

the

10

ohms

heater can

50

ohm

heater

power output

of

50

and

available for

W50

is

rated at

volts (into

COPYRIGHT

resis­heater
heater

yields

also

60

50

12/87

watts

be

to

10

be

will

of

the

1

ohm

LSCI

Model

DRC-91c

Section

11

load) while the

amperes at approximately

25

(into

A

50

ohm

ohm,

50

W60

is rated at 1.5

43

volts

load).

watt (1/4" dia. x 1"

Table

2-5.

REMOTE

connector

SENSOR

ID

Assignments,

long) cartridge heater is available
as well as a
dia.

A

wire

x

1"

long) cartridge heater.

30

gauge stranded copper lead

(ND-30)

ohm,

is recommended for

25

watt

(3/8”

25

connecting to the heater.

2.3.9.1

MAX

HEATER

POWER

Limit

The POSITION DATA is the binary

Make sure that the

limit potentiometer is turned fully

clockwise during the setup of the DATA binary combinations.

instrument

so

available on the

if

desired. Fully clockwise corre- tables stored in the DRC-91C.

MAX

HEATER

POWER

that full power

MAX

power scale, to select specific sensor

is

representation of the remote posi-

3-4

tion. Table

gives the POSITION

The

remote position input can be used

curve

The

sponds to approximately 1 ampere correlation between remote position
while fully counterclockwise cor- and sensor curve is given in Sec-

responds to the -1 range

2.3.9.2

Current

or

(330mA)

Power

Display

The

HEATER

read either

%

meter can

%

of output power or

be

of output current. The internal the

DIP switch setting (main board

.

Output

tion III. The
be

expanded to allow for the use

up to three

Scanners with the

REMOTE

8084

SENSOR ID can

or

8085

8082

Sensor

Position

Data Adapter. Remote position

of

1F

set to (31) is reserved to indicate that

%

S7,

more than one scanner is active

8082.

When this condition is

present, the DRC-91C displays

to

ERR09

switch 1) controls whether the until the fault is corrected.
meter reads

or

%

power

shipped to read in

in

%

(open).

current (closed)

The DRC-91C is

%

power. 2.5 IEEE-488

INTERFACE

Connector

The

2.4

The

REMOTE

REMOTE

SENSOR

ID

Connector

SENSOR ID connector,

of the DRC-91C is in full compli­ance with the IEEE Standard

J5, 78.

IEEE-488

The connector has metric

Connector on the back

488-19-

on the rear panel receives POSITION threaded mounting studs, visually

DATA from a Model

8084

or

8085

indicated by the color black.

Sensor Scanner or a Model SW-10A Metric threaded cable lockscrews

Ten-Sensor Selector Switch. The (also black) must be used to secure

REMOTE

Cable

SENSOR

and

ID Interconnecting an

REMOTE

SENSOR

IEEE-488

ID

connec- inStrUment. Model

interface cable to the

8072 IEEE-488

tor assignments are given in Table Interconnect Cables (one meter

2-5.

long) are available from Lake
Shore.

COPYRIGHT

12/87

LSCI

2-5

Section

2.6

2.6.1

The
Section

II

OPTIONS

The

RS-232C

VI

DRC-91C

should be operated at an

ambient temperature range of

8223 RS-232C

Interface.

5°C.

The unit may be operated

option is described in within the range

of this manual including less accuracy.

of

Model

15-35°c

DRC-91c

23°c

with

±

connections.

2

.

7.2

Hummidity/Altitude

2.6.2

is

manual.

The

described in Section

8225

Linear

Analog

output

VI

of this The

DRC-91C

is

for laboratory use

and no humidity or altitude speci-

fications have been determined for

2.6.3

is described in Section

Section

2.6.4

expands the set point resolution to If the Model

0.01

kelvin below
voltage
volts out
This results in
approximately
and

DT-470 series semors.

The

VI

The

8229

High

Scanner

of this manual.

Resolution

kelvin above

100K.

is

expanded to

of

3

0.01

0.001

kelvin below

Input

100K

Option this unit.

III

and

2.8

set

point

and

0.001

operating incorrectly, refer to the

REPACKAGING

DRC-91C

FOR

SHIPMENT

appears

to

The equivalent Technical Service Guide for

25

micro- troubleshooting advice. If these

volts full scale. tests indicate that there is

a

setability of fault with the instrument, contact

kelvin above 40K

28K

for the for a Return

LSCI

(RGA)

or a factory representative

Goods

Authorization

number before returning the

be

a

instrument to our service depart-

2.6.5

tom

calibration

8001

precision

option.

Cus-

programing of specific Sensor

curve(s)

at factory.

ment.

When

returning an instrument for
Provides highest degree of readout service, the following information
accuracy. must

can attempt

2.6.6

tions will deliver

respectively. The

1

load with the

The

ampere

and

W50

50

and

W60

Output

50

or

60

W50

is rated at

volts into a

W60

rated at

Op

watts

50

ohm

1.5

1.

2.

3.

amperes at approximately 43 volts 4. Description

into a

25

ohm

load. These are

5.

be

provided before Lake Shore

any

repair.

Instrument Model and Serial

#s

User's Name, Company, Address,

and Phone Number

Malfunction Symptoms

of

system

Returned

Goods

Authorization

#

factory options only.

If the original carton is avail-

2.7

ENVIRONMENTAL

REQUIREMENTS

able, repack the instrument

in

a

plastic bag, place it in the carton

WARNING using original spacers to protect

protruding controls. Seal the

To

prevent electrical fire

or

shock hazards, do not expose
the instrument to rain or excess

carton with strong paper or nylon

tape. Affix shipping labels

and

“FRAGILE” warnings.

moisture.

If the original carton is not
available, pack the instrument

2.7.1

Operating

Temperature

similar to the above procedure,

being careful to use spacers

or

In order to meet and maintain the suitable packing material on all
specifications in Table

1-1,

the sides

Of

the instrument.

2-6

COPYRIGHT

12/87

LSCI