Lakeshore 805 User Manual

User’s Manual

Model 805

Temperature Controller

This manual applies to instruments with Serial Numbers from 18000 and subsequent.

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 and described herein have been developed solely on company funds of Lake Shore Cryotronics, Inc.
No government or other contractual support or relationship whatsoever has existed which in any way affects or mitigates proprietary
rights of Lake Shore Cryotronics, Inc. in these developments. Methods and apparatus disclosed herein may be subject to U.S. Patents
existing or applied for. Lake Shore Cryotronics, Inc. reserves the right to add, improve, modify, or withdraw functions, design
modifications, or products at any time without notice. Lake Shore shall not be liable for errors contained herein or for incidental or
consequential damages in connection with furnishing, performance, or use of this material.

Obsolete Manual June 1987

Lake Shore Cryotronics, Inc.
575 McCorkle Blvd.
Westerville, Ohio 43082-8888 USA

Internet Addresses:

[e-mail]
[e-mail]

Visit Our Website:

www.lakeshore.com

Fax: [phone]
Telephone: [phone]

TABLE

OF

CONTENTS

SECTION

1.1

1.2 DESCRIPTION

I

-

GENERAL INFORMATION

INTRODUCTION

1-1

1-1

1.3 INPUT OPTION MODULES 1-2
1-4 SPECIFICATIONS 1-4

SECTION

II

-

INSTALLATION

2.1 INTRODUCTION 2-1

2.2

2.3 PREPARATION FOR USE

INITIAL

INSPECTION 2-1

2.3.1 Power Requirements
2-3-2 Power Cord

2-1

2-1

2-1

2.3.3 Grounding Requirements 2-1

2.3.4 Bench Use 2-2

2.3-5 Rack Mounting 2-2

2.3.6 Sensor Input Connections 2-2
2-3-7 Sensor Output Monitors 2-3

2.3.8 SENSOR

ID

Switches 2-3

2.3.9 Heater Power 2-4

2-4 OPTIONS 2-4

2.4.1 Model

2.4.2 Model

8053 RS-232C Option 2-4
8054 IEEE-488 Option 2-4

2.4.3 Model 8055 Linear Analog Output Option 2-4

2.5

ENVIRONMENTAL

REQUIREMENTS 2-4

2.5.1 Operating Temperature 2-4

2.5-2 Humidity/Altitude 2-4

2.6

REPACKAGING FOR SHIPMENT 2-4

SECTION

III

-

3.1 INTRODUCTION

3.2 INSTRUMENT CONFIGURATION 3-1

3.2-1 Input Modules 3-1

3.3 PRECISION OPTIONS 3-1

3.4 CONTROL FUNDAMENTALS
3-5 CONTROLS

OPERATING INSTRUCTIONS

AND

INDICATORS 3-1

3-1

3-1

TABLE

FRONT PANEL DESCRIPTION

OF

CONTENTS. CONT'D

3.6

3.7

3-8

3-9

3.10

3.11

3.12

3.13

3-14

POWER ON/OFF Switch

3.6.1

DISPLAY SENSOR Block

3.7.1

3-7.2

3.7.3

3-7.4

CONTROL BLOCK

3.8.1

3-8.2

3.8-3
3-8-4

3.8-5

3.8-6

LOCAL/REMOTE OPERATION

CONTROL Switch
HEATER Power Output Terminals
SENSORS/MONITORS
SENSOR CURVE SELECTION

3.13.1 Display

3.13.2 The Precision Option Table
SENSOR ID Switches

POWER-UP Sequence

Display SENSOR

Units Select

Display

3.7.3.1

3.7.3.2

3.7.3.3

Filtering

CONTROL SENSOR
SET POINT
GAIN
RESET
HEATER
HEATER POWER Range

SENSOR
Voltage Units
Resistance Units
Temperature Units

the

%

REAR PANEL DESCRIPTION

of

Accessed Curve

Input

Units

Display

3-1

3-1

3-2
3-2
3-2
3-2
3-2
3-2
3-2
3-2
3-4
3-4
3-4
3-4

3-4
3-4
3-5

3-6

3-6

3-6
3-6
3-6

3-7
3-7

3-7

SECTION IV . REMOTE OPERATION

4.1

4.2

4.3 INTERFACE CAPABILITIES

4.4

4.5

4-6

IEEE-488 INTERFACE (OPTION
GENERAL IEEE SPECIFICATIONS AND OPERATION

805

4.4.1

4.4.2

4-4-3

IEEE-488 BUS COMMANDS

4.5.1 Uniline Commands

4.5.2 Universal Commands

4.5.3

4.5.4 Unaddress Commands

4-5.5

4.5.6

PROGRAMMING INSTRUCTIONS

4.6-1

IEEE-488 ADDRESS SWITCH

Terminating Characters (delimiters)
Talker
The IEEE-488 INTERFACE

Addressed Commands

Device-Dependent Commands
Talker

Input

and/or

and

Data Format

8054)

Listener Configuration

Listener

bus

Status 4-5

and

Program Codes

address

4-1
4-1
4-1
4-2
4-2

4-2

4-2

4-2

4-2

4-3

4-3

4-3

4-3

4-5

4-5

TABLE

OF

CONTENTS.

CONT'D

4.7

4-8

4.9

4.10

4.11

4.12

4.13

INSTRUMENT SETUP PROGRAM CODES

4.7.1

4.7.2

4.7.3
4-7-4

SELECTION OFSETPOINTUNITSANDDISPLAYSENSOR (Table 4-4)

4.8.1

4.8-2

The

THE CONTROL COMMANDS (See Table

4.10.1 The Set Point Value

4.10.2
4-10.3 Setting

4.10.4 Heater Range . The R Command

4-10.5

Output Statement
PROGRAM EXAMPLES

4.12.1

Sample Programming 4-11

4.13.1 HP86B Keyboard

4.13.2 National Instruments IBM Example
4-13.3 HP Example

EOI Status . The ZN1 Command
Interface

4-7.2.1

4.7-2.2

4.7-2.3

Terminating
Clear

Units
Display Sensor Selection . The F1C1 Command 4-6

A

and

B

Setting

Note: The Return

Output

4.12.1.1 The

4.12.1.2 The "W1" Data String (Table
4-12.1.3 The

4.12.1.4 The "W3" Data String Table

4.12.1.5 The

4.12-1.6 The "WI" Data String (Table

for

SENSOR ID Information . The AC1C2

Mode

Local 4-6
Remote

Local

Set Point . The FOC1 Command 4-6

the
the

Data Statements

of

.

The

Lockout

characters

GAIN

RESET

Request

"W0"

"W2"

"WS"

.

Data String (Table 4-7) 4-10

Data String (Table

and

Interactive

805 Commands

MN1

.

The S Command

The P Command

(Integral)

to

Local

.

The WC1 Command

"WP"

Command

.

The TN1 Command

Data Strings (Table

(see

4-5)

Program

Table

and

.

The I Command

4-4)

BC1C2 Commands

4-7)
4-7)

4-7)

4-84-11

4-8)

4-6

4-6

4-6

4-6

4-6

4-6

4-6

4-6

4-6

4-9
4-9
4-9

4-9

4-9
4-9
4-9

4-9

4-10

4-10
4-10
4-11

4-11

4-11

4-11
4-13

SECTION V

5.1

5.2

5.3

5.4

5.5

5.6

5.7 TROUBLESHOOTING 5-2

SECTION VI

6.1

6.2

6-3

6-4
6-5 OPTION INTERFACE CARDS

INTRODUCTION 5-1
GENERAL MAINTENANCE 5-1
FUSE REPLACEMENT
LINE VOLTAGE SELECTION 5-1

PERFORMANCE VERIFICATION

5.5.1

5.5.2 Performance Verification Procedure
CALIBRATION

INTRODUCTION
OPTION INPUT MODULES
ACCESSORIES
OUTPUT POWER OPTION

.

MAINTENANCE

Performance Verification Connector

.

OPTION

AND

5-1

5-1

5-2

5-2

5-2

ACCESSORY INFORMATION

6-1
6-1
6-1
6-2

6-2

LIST

OF

TABLES

AND

ILLUSTRATIONS

SECTION

Table
Table 1-2. Specifications, Model 805 Temperature Controller 1-4

SECTION

Table 2-1-Line Voltage Selection 2-1
Figure
Table 2-2-Connector Plug Connections 2-2
Figure
Figure
Table 2-3, SENSOR

SECTION

Figure 3-1.
Table 3-1-Reset Settings. 3-4
Figure
Figure 3-3a. Nominal Gain Settings 3-6
Figure 3-3b. Nominal Reset Settings (Beats/Second) 3-6
Table 3-2.
Table 3-3. Sensor Curve Table Information
Figure 3-4, SENSOR

I

-

GENERAL

1-1.

Input

I1 - INSTALLATION

2-1,

Typical Rack Configuration

2-2. Sensor
2-3. Sensor

III

Model

3-2. Model

Standard

Option Modules, Model

Connections 2-3

IO
ID

-

OPERATING

805 Temperature Controller - Front Panel 3-3

805 Temperature Controller - Rear Panel 3-5

Curve Information 3-6

ID

INFORMATION

805

Temperature Controller 1-3

2-2

Definitions 2-3
Curve Address 2-4

INSTRUCTIONS

-

PrecisionOptionTable 3-7

Definitions. 3-8

SECTION

Table 4-1. Interface Functions.. 4-2
Figure 4-1. IEEE-488 Address Switch for the 805. 4-3
Table 4-2.
Table 4-3. IEEE-488 Bus Commands. 4-5
Table 4-4. 805 Listener Program Code Summary

Table 4-5. 805 Program Code Summary, Cont'd.

Table 4-6.
Table 4-7. 805
Table 4-8.805

SECTION

SECTION

Table 6-1. Option and Accesories for Model805 Temperature Controller.. 6-1

IV

-

REMOTE

Allowable

of Set Point Units, Display Sensor and Setting

Control Commands and Output Statement Request. 4-8

Remote

Output
Output

V

-

MAINTENANCE

VI - OPTION

OPERATION

Address Codes for the 805 4-4

-

Instrument Setup, Selection

Interface Input of the A and

Talker Data Statements. 4-12
Talker Data Statements. 4-13

AND

ACCESSORY

INFORMATION

SENSOR

B

SENSOR

ID.

ID.

4-7

4-9

SECTION

I

GENERAL INFORMATION

1-1

The information contained

manual is for the installation, operation,

remote programming and option and acces­sory information for
Cryotronics, Inc.
Controller.
Guide is available for this instrument which
contains performance and calibration
procedures, schematics, component layouts
and a replaceable parts list.

This section contains general information for
the Lake Shore Cryotronics, Inc.
Temperature Controller. Included is an

instrument description, specifications,

instrument identification, option and
accessory information.

1.2

The 805 Temperature Controller is a
microprocessor based instrument which
providestrueanalog control.

inputs from

the temperature with up to 4 digits of

resolution
voltage for diodes to 1
for resistors to four places.

The dual sensor
monitor temperature at more than one point.
Sensor select pushbuttons on the front panel
enable the user to display either input at

will.

via a rear-panel toggle switch with the
choice indicated on the front panel. This
choice is independent of display status.

The Model 805 is direct reading

ture when used with the Lake Shore DT-470

Series Temperature Sensors.

Sensors follow the same temperature

response curve. Four bands of tracking
accuracy are offered so that sensor selection
may be made with both technical and

economical considerations for any given

application. Low temperature (2 to

INTRODUCTION

in

this operations

the

Lake Shore

Model

A

separate Technical Service

805 Temperature

805

DESCRIPTION

It

accepts

up

to two sensors and displays

in

K,

°C or

input

The system control sensor is selected

°F.

It

displays

millivolt,

allowstheuser to

and ohms

in

tempera-

All

DT-470

100K)

accuracies range from 0.25K for band
1K for band 13. For more demanding
requirements, DT-470 Sensors can be indivi­dually calibrated to accuracies of better

50

than
ture range.

Diode sensor voltages are digitized with a
resolution of
full scale. For the display, temperature is
rounded to
to

For greater precision individual sensor
calibrations can be accommodated through
the 8001 Precision Calibration Option which
programs the instrument with a particular
response curve. The algorithm within the
instrument interpolates between data points
to an interpolation accuracy which exceeds

0.01K over the entire temperature range of
the Precision Option. The analog-to-digital
converter is accurate to plus or minus the
least significant bit, which forthe470
series sensor results
1mK
transitional region between the two
temperatures. Therefore, at temperatures
below 28K, the overall system accuracy, the
sum
that of the calibration itself (Lake
calibrations are typically better than 20mK
within this region) is ±0.03K. Above 28K,
system
typical value of ±75mK above 40K. Seethe
Lake Shore Cryotronics, Inc. Low
ture Calibration Service brochure for

additional discussion of calibration accuracy.

The 805 display uses digital filtering which
averages up to ten temperature readings.
This reading mode eliminates noise within

the cryogenic system analogous to averaging
with a digital voltmeter. This algorithm
can be deselected (bypassed) by switch 2
the
panel for a given
not to average readings. A blinking
decimal point at the upper left of the

millikelvin depending on tempera-

100

microvolts out of 3 volts

0.1

kelvin above

0.01

below 28K and 45mK above 40K with a

of

SENSOR

kelvin below

the instrument accuracy

accuracy

gradually moderates to

ID

dip switch on the back

input

100

kelvin, and

100

in

an uncertainty of

if

the user prefers

11

kelvin.

(11mK)

and

Shore

Tempera-

to

a

of

1-1

display indicates that averaging is on.

The Model805 can also be used with the
optional input conversion modules (-6) which
allow either input to be converted to handle
either the TG-120 series diodes

(or any
diode with a 0 to 6 volt output), or positive
temperature coefficient metallic resistors.,

i.e., platinum (-P2 or -P3) or rhodium-iron

(-R1)

within the instrument and is called

resistors. The

DIN

curve isstandard

up
automatically unless a precisionoption is
present for the platinum resistor. The

of

accuracy
sensor and its conformity

the reading is dictated by the

to the

DIN curve.
The tolerance on these devices is given on
the technical data sheet for the Lake Shore
PT-100 series sensors. Thecombined
accuracy of the instrument and a calibrated
resistor with a precision option is on the
order of 40mK over the useful range ofthe
sensor (above 40K for the platinum). Note
that a precision option is required for a
rhodium-iron or a TG-120 to readcorrectly

in

temperature.

These

input

conversionmodules are easily
instal led by the user; thus, units can be
modified to satisfy changing requirements.

in

The ample memory space provided

the805

allows several response curves to be stored

in

one instrument. Depending on the
complexity of the curves, up toten can be
programmed into the unit. The

SENSOR

ID

switches are used to select which particular
sensor response curve is to be used with

input.

each
sensor changes at

Thus, the user is able to make

will

even when different

response curves are required.

The data for calibrated sensors can be
stored within the instrument by means of
the8001 Precision Option. Each curve can

99

contain up to

sensor unit-temperature
data points. With the standard precision
option format, which consists of 31 data
points and a 20 character information line,

in

the

up toten curves can be stored

unit.
See Paragraphs 3-6 through 3-10 for more
description.

A1 though voltage (resistance)-temperature
data points arestored as a table, interpola-

in

tion within the instrument results

the

equivalent of a high order polynomial

in

calculation

the converting ofthe input
voltage (or resistance) to temperature.
This is done by means of a proprietary
algorithm developed at Lake Shore Cryotro­nics, Inc.

T

h e control temperature set - poi

n

t

selection
is made via thumbwheel switches on the
front panel ofthe instrument. The set­point switches, which provide a continuous
indication of the set-point value, enable the
user to quickly and easily determine
whether his system is at control tempera­ture. The set-point is in the same units as
is the Display sensor (kelvin, celsius,
fahrenheit, or volts [ohms]).

The control sectionof the805 provides
two- term temperature control. Proportional

(GAIN)

and integral

(RESET)

are individual­ly tuned via front-panel potentiometers.
The gain mode is in a nominal log per cent
with the reset being linear.

the

Analog heater output of
ture Controller is a maximum of

805 Tempera-

25

watts
when a 25 ohmheater is used. A digital
meter on the front panel of the 805
continuously shows the heater power output
as a percentage of output range. Thus, the
user can conveniently monitor power applied

to his system. To accommodate systems
which require lower heater power, the
maximum heater output of the805 can be

of

attenuated in two steps
When greater power output is required,

a decade each.

an

optional 56 watt power output stage is

for

available (W60) which is designed

It

ohm load.

is rated at a nominal

a 25

1.5

amperes and 45 volts.

An optional IEEE-488 (Model

8054)

or

RS-

232C (Model 8053) interface is available for

the 805. Either interfacecan be used to

remotely control all front-panel functions.

1.3

INPUT OPTION

MODULES

1-2

The input option modules forthe805
Controller are listed

in

Table

1.1.

Table

1.1.

Input

Option

Modules,

Model

805

Temperature Controller

Diode or Resistance Sensor

(ordered separately):

DIODE SENSOR CONFIGURATION

Diode Excitation:
microamperes
current source less than 0.01%

DC

(±0.005%).

current Source. 10

AC

noise from

of DC

current.

Diode

Voltage Range:

0

to 3 volts

in

standard configuration.

Diode Temperature Range: Dependent on
Sensor selected. DT-470-SD covers tempera-

1.4

ture range from

to475 kelvin. Refer to

diode specifications for other temperature

limitations.

Diode Response Curve(s): The silicon diode
series DT-470 Curve #10 as well as the
series DT-500

DRC-D

present in the 805. Curves

and DRC-E curves are

to

match other

existing Sensors are available on request.

Diode Sensor Power Dissipation: Dissipation

is the product of Sensor Excitation Current

uA)

10

Accuracy:
accuracy

and Resultant Sensor Voltage.

Unit

reads sensor voltage to

of

better than 0.1mV. Equivalent

an

temperature accuracy is a function of Sensor
type, temperature (sensitivity) and calibra­tion of Sensor. Seethe Technical Data
Sheet for the DT-470 Series Temperature
Sensors and the Model 8001 Precision Option

LSCI

for accuracy with

calibrated sensors.

6-VOLT DIODE SENSOR MODULE

-6

Diode Sensor

standardconfiguration but has 0

input

to accommodate TG-120 Series Sensors.

Converts either Input A or Input

Input

Module, Similar to

to

6 volt

6

(or both
with two modules) to accommodate the 6
volt modification for TG-120 series sensors.
Requires calibrated sensor and 8001 Precision
Option for 805 to be direct reading in
temperature. This modulemay be field

installed.

OHM

100

-P2 100 Ohm

PLATINUM MODULE

Platinum

Sensor Module:

Converts either Input A or

6 (or both with

two modules) to accommodate 100 ohm

Platinum RTD Sensors. This modulemay be

field installed.

t

Tempera
range depends on Sensor. Resistance
one range from

ure/Resistance Range: Temperature

in

000.0

to 300.0 ohms.

Resolution: 0.01 ohm or equivalent

temperature.

Sensor (order separately): Configuration

PT100

optimized for
or any other100 ohm (at

Series Platinum Sensors

0°C)

positive

temperature coefficient Sensor.

Sensor Excitation:

Sensor Response

response curve is based on 0.1
changeability
coefficient

Accuracy

conforms

at

(0-100°C)

1

.0

mA

(±0.005%).

Curve:

0°C

Platinum Sensor

%

inter-

and temperature

of 0.00385/°C.

to DIN 43760 tolerances
plus display (electronics). Special calibra­tions can be accommodated with 8001
Precision Option.

Sensor Power Dissipation: Dissipation is
the product of sensor excitation current
squared and the Sensor resistance.

OHM

1000

-P3 1000 Ohm

PLATINUM MODULE

Platinum Sensor

Module:

Essentially the same as the -P2 except

1000

accommodates

ohm Platinum Sensor (or
any other 1000 ohmmetallic sensor).
Sensor excitation is 0.1 milliampere.

Unit

reads resistance in ohms. Requires
calibrated sensor and programmed calibra­tion to read temperature. Accuracy is

0.1

ohm or equivalent temperature.

27

OHM

RHODIUM-IRON MODULE

-R1 27-ohm Rhodium-Iron Sensor Module:
Essentially the same as -P2 except accom­modates RF-800-4 Rhodium-Ironsensor.
Sensor excitation is 1mA. Unit reads

in

resistance

ohms. Requires calibrated
sensor, etc. to read temperature. Accuracy
and resolution is 0.003 ohms or equivalent

temperature.

1-3

1.4

Instrument specifications are listed in Table

1.2. These specifications are the perfor-

mance standards

instrument is tested.

Option ports aredesigned into the805 to
ease the addition of interfaces and outputs.
The Model 805 has two option ports which
allow
simultaneously (see limitations below). The
options are easily installed by the user; thus,
units can be changed

SPECIFICATIONS

or

limits

up

to two options to be used

against which the

or upgraded to satisfy changing require­ments.

Only one computer interface can be

installed in the805 due to space limitations

in

the805 rear-panel. The Model
Analog Output option is available to provide
an analog output of 1mV/K
thedisplay temperature units.
display is in sensor units, theoutput for
diodes is
1mV/ohm; for

0.1mV/ohm; for rhodium-iron, 10mv/ohm.

0.1V/V;

for 100 ohm platinum,

1000

independent of

ohm platinum,

8055

If

the

Table

INPUT CHARACTERISTICS:

Inputs:

(A

or

B)

indicated on the front panel. Display sensor

(A

or

B)

interface, independent of control sensor.

input

The
Sensor Input Module Installed. The805 can
accommodate separate

A

and

B

of different sensor types.

Input

configuration for the805 is
up to use DT-470 series silicon diode sensors
(0-3V). Optional input conversionmodules
allow
diode sensors (0-6V), as well as PT-100
series 100/1000 ohm platinum RTD's, and
800 series rhodium-iron sensors.

Input Conversion Module

the

(one per input)

1.2.

Two Sensor Inputs. Control Sensor

selected via rear panel switchand

can be selected from front panel or

characteristics are a function of

input.

Conversion Modules: Standard

805 to be used with TG-120 series

-6*

-P2

-P3*

-R1* 27 ohm rhodium-iron

Specifications, Model

input

This allows concurrent use

100

1000

modules for

both

inputs set

S

en

s

o

r

6

volt diodes

(e.g. TG-120)

ohm Platinum

ohm Platinum

the

RF-

Type

805

Temperature

rhodium-iron RTD's and other positive
temperature coefficient resistors with
proper choice of input. Seethe Lakeshore
Cryotronics, Inc. Sensor catalog for details
on the above Sensors.

Sensor Response Selection: Rear-panel Dip
switch or Interface permits selection of
appropriate Sensor response curve when

more than one curve is stored (see

Precision Option).

DISPLAY READOUT:

Display:

reading in
temperature
annunciators.

Display Resolution: 0.1K above

below 100K, or 1
tance option)

Temperature Accuracy: Dependent on
Sensor Input and Sensor. See Input

Options available.

Temperature Range: Dependent on Sensor

Input

4-digit

Sensor

in

K,

Module and Sensor.

Controller

LED

Display of Sensor

Units (Volts or Ohms) or

°C,

or

°F

shown with

100K,

0.01K

mV

(0.1 ohm

with

resis-

*To readcorrectly in a
scale,
calibrated sensors and the 8001 Precision
option for the 805.

Sensors: Ordered Separately. 805 with

input

types of diodes as well as platinum and

1-4

these modules

conversionmoduleswill handle

temperature

require the use of

all

Table

1-2.

Specifications, Model

805

-

Continued

TEMPERATURE

Set Point:

CONTROL:

Digital thumbwheel selection

in

kelvin, celsius, fahrenheit, or volts (ohms

with

Set Point Resolution:

resistance option).

Same units and

resolution as display.

Controllability:

Typically better than 0.1K

in

a properly designed system.

Control Modes:

Proportional (gain) and

integral (reset) set via front-panel or with

optional computer interface.

Heater output:

Up to 25 watts (1A, 25V)
available. Three output ranges can be
selected either from
optional computer interface and provide ap­proximate decade step reductions of maximum
power output. Optional 60 watt, 1.5 ampere

25

ohm output (Option W60)

is

available for

the 805.

GENERAL:

Sensor Voltage/Monitor:

Buffered output of
each diode sensor voltage for standard
configuration. For -6 optionmodule,
voltage output times 0.5. For positive
temperature coefficient modules (-P2, -P3,-

R1),

buffer is sensor voltage output times-

10.

Response time (electronics):

Display update

cycle time of less than1 second (650 msec

2

typical).

seconds (3 readings) on channel

change or step change.

IEEE-488 Interfaceoption:

Allows remote
control of setpoint, gain, reset, units,
display sensor and heater power range

(except power on/off). Provides output of

display, display units and all front panel

functions.

RS-232C Interfaceoption:

Controls same

parameters as IEEE-488 Interface.

Heater output

Monitor: LED display

continuously shows heater output as a
percentage of output range with a resolution

1%.

of

Control Sensor:

Either Sensor

Input

(selected from rear panel).

Dimensions, Weight:

x

high

381 mm deep (8.5 in. x 4 in. x 15

216 mm wide x 102 mm

in.),

5.5 kilograms (12 pounds).

Power:

100,

120, 220 or 240

VAC

(selected

via rear panel with instrument off), 50 or

Hz,

60

Accessories Supplied:

75 watts.

Mating connector for

sensor/monitor connector, operations

manual.

1-5

This Page Intentionally

Left

Blank

SECTION

II

INSTALLATION

2.1

This Section contains information and

structions pertaining to instrument set-up.
Included are inspection procedures, power

and grounding requirements, environmental

information, bench and rack mounting in­structions, a description of interface con­nectors, and repackaging instructions.

2.2

This instrument was electrically, mechan-

ically and functionally inspected prior to
shipment.
damage, and

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 shipping materials.

to the instrument
appropriate claims promptly with the carrier,
and/or insurance company. Pleaseadvise
Lake Shore Cryotronics, Inc. of such filings.

In case of parts shortages, advise LSCI

immediately.

for any missing parts unless notified within

60

Shore Cryotronics Warranty is given

first page

2.3

INTRODUCTION

in-

INITIAL INSPECTION

It

should be free from mechanical

in

perfect working order upon

If

there is damage

in

transit, be sure to file

LSCI

cannot be responsible

days of shipment. The standard Lake

on

the

of

this manual.

PREPARATION

FOR

USE

2.3.1

The Model

50 to

240

Verify

Selection

located

Model

to

proper

inserting

on

2.3.2

A

three-prong detachable

120

rear panel
included with the instrument.

2.3.3 Grounding Requirements

To protect operating personnel, the National
Electrical Manufacturer's Association

(NEMA)

require, instrument panels and cabinets to

be grounded. This instrument

with a three-conductor power cable which,
when plugged into an appropriate recep­tacle, grounds the instrument.

Power Requirements

805

requires a power source

60

Hz

single phase 100, 120, 220 or

VAC

be

the

VAC

(+5%,

that

on

805

used

fuse

is

the

-10%).

the

Wheel

the

rear

set

(Table

is

power

CAUTION

AC

Line

(Figure

3-2,

panel

to

the

AC

2-1)

and

installed

cord

and

Voltage

of

voltage

that

before

turning

instrument.

Power Cord

power cord for

operation which mates with the

UL/IEC/ICEE

recommends, and some local codes

Standard plug

is

of

Key

1

the

the

is

equipped

Line

Voltage

100
120
220
240

Table

(Volts)

2-1.

Operating

Line

Voltage

Range

90-105
108-126
198-231

216-252

Selection

(Volts)

Fuse

0.5-

0.5-

1

1

-

-

(A)

SB

SB
SB
SB

2-1

Figure

2-1,

Typical Rack Configuration

2.3.4

Bench Use

The 805 is shipped with feet and a

tilt

stand
installed and is ready for use as a bench
instrument. The front of the instrument

may be elevated for convenienceof opera-

tion and viewing

by

extending the

tilt

stand.

2.3.5

Rack Mounting

The 805 can be installed

in

a standard

19

inch instrument rack

by

using theoptional

RM-3H1 or RM-3H2 rack mounting kit.

A

typical RM-3H1 rack kit installations with
handles is shown

in

Figure 2-1.

2.3-6

Sensor Input Connections

The Model 805 is supplied with a 24 pin

rear panel mounted D-style connector for
the connection of two sensors. The con­nection definition for the sensor(s) is given
in

Table 2-2 and is shown

in

Figure 2-2.

Table 2-2. Connector Plug Connections

Pin

#

1

2
3

4

5

6

7

8

9

10

11

12

Function

+V

A

Input

-V

A

Input

SHIELD

(A

Input)

+V

B

Input

-V

B

Input

+V Buffered Sensor

-V

Output

Signal(A)

+V

Buffered Sensor

-

-V

Output

Signal(B)

Pin

#

13
14

15
16
17

18
19

20
21
22
23
24

Function

+I

A

Input

-I

A

Input

SHIELD

(B

Input)

+I

B

Input

-I

B

Input

+V

Option

8055

-V

Analog

Output

+5

VDC

(10

mA

LIMITED)

DIGITAL GROUND

2-2

Figure

2-2,

Sensor Connections

and Sensor
connector on the back of the instrument.
This connector also carries the Model
Analog Output Option when present. The
connector
Table 2-2.

6

areavailable from

pin

definitions are given in

the

8055

same

The use of a four wire connection (Figure 2-

for

2a) is highly recommended
elements

the voltage sensing pair which translates
into a temperature

An

alternate two line wiring method (Ter-

minals

shorted)

TG-120 series

tions where lead resistance is small and
small readout errors can betolerated (b).
Measurement errors due to lead resistance

for a two leaddiode hook-upcan be

lated using;
microamperes,
dV/dT is the diode sensitivity
measurement error. For example,

ohms with dV/dT = 2.5 millivolts/kelvin
results
Two wire connections are not recommended
for other sensor types.

to avoid

A

and E shorted together, B and

may

diodes

in

a temperature error

introducing

measurement

be used for the

in

less critical applica-

T

=

IR/[dV/dT] where I is 10

R

is the total lead resistance;

resistive

IR

drops

error.

DT-470

calcu-

and

T

is the

R = 250

of

1

kelvin.

in

D

and

2.3.8

The
switches are
curves and to activate or deactivatedigital
filtering. The
tion is described
Figure 2-3.

Figure

Switch

SENSOR

SENSOR

used

2-3.

setting

1

2

3

OPEN

CLOSED

OPEN

CLOSED

OPEN

ID

Switches

A ID

SENSOR

SENSOR

and

to select stored sensor

SENSOR

ID

switch informa-

in

Table 2-3 and

ID

Definitions

Description

- Negative T.

-

Positive

- Continuous

-

DigitaI.

C.

T.

C.

Update

Filtering

- Thermal Considered

B

On

CLOSED - No Thermal Considered

4

5

OPEN

CLOSED

- Curve Selection

-

Position

Multiple

selection

Bit

3

ID

The Lake Shore Cryotronics, Inc.

QUAD-LEAD™

ideal for connections to the sensor since the
four leads are
The wire is phosphor Bronze with a formvar
insulation and butryral bonding between the
four leads.

2.3.7

Buffered

36 gauge cryogenic wire is

run

together and color coded.

Sensor

voltage

Output

outputs of both Sensor A

QL-36

Monitors

6

7

8

Table 2-3 gives the position of the address
switches to call up standard curves stored
within the instrument. Information on Pre-

Multiple
Multiple
Multiple

Bit

Bit

Bit

2

1

o

2-3

cision Option Curves is given

Curve

#2

which limits the set point betueen
325K while Curve #4 has an upper
475K and a corresponding upper

set point.

#2

and Curve

has an upper temperature limit of

#4

differ

in

Appendix

in

that Curve

limit

B.

325K

0 and

limit

of

for the

is

also
maximum current of 1.5 amperes at approxi­mately 43 volts.

Lake Shore recommends a 30 gauge stranded
copper lead wire

lead wires to the heater.

set

up

for a 25 ohm load with a

(Model ND-30)

for use as

Table

SENSOR

5 6 7 8

0 0 0 0

0 0 0 1
0 0 1 0
0 0 1 1

0 1 0 0

See

SECTION

information on sensor selectionand the

operationof the SENSOR ID switches.

2.3.9

The heater output leads should be electri­cally isolated from the sensor(s) ground(s) to
preclude the possibility of any of the heater
current affecting the sensor
The heater leads shouldnot runcoincident

with the sensor leads due to the possibility

of

capacitive pick-up betueen the two sets

of

leads.

they should be wound
sensor leads at ninety degrees
sible.

The heater output is a current drive and
does not have to be fused. The 805 is
designed to work with a
maximumheater output
smaller resistance is used, themaximum
heater power corresponds to the heater

resistance, i.e., 10 ohms yields

larger heater resistance can also be used
with the 805. For example, since the com­pliance voltage is slightly above

50

ohmheater would result in a maximum

power output of

Anoptional
watts is available for the 805. This output

2-3.

ID

Switch

III and Appendix B for more

Heater

If

they are in close proximity,

(W60)

SENSOR

Power

12.5

output power stage of 60

ID

Curve

Curve

so as to cross the

watts

#

Description

I

00

01

02

03

04

25

ohmheater for

(25

watts). If a

DRC-D

DRC-E1

CRV

DIN-PT

CRV

input

if

at all pos-

10

watts.

25

volts; a

[(25)

2

Address

10

10

signal.

A

/50].

2-4 OPTIONS

2.4.1 Model 8053
tion. The
Section

2.4.2 Model 8054 IEEE-488 INTERFACE

Option.

Section

2.4.3 Model8055 Linear Analog

Option. The Linear Analog Option is des-

cribed

2.5 ENVIRONMENTAL REQUIREMENTS

RS-232C

VI

The

VI

in

Appendix C of this Manual.

RS-232C

option is describedin

of this manual.

IEEE

option isdescribedin

of this manual.

INTERFACE

Output

Op-

WARNING

To

prevent

hazards,

to

excess

2.5.1 Operating Temperature

In order to meet and maintain the speci­fications in Table
operated at an ambient temperature range
of 23°C ±5°C. The unit may beoperated
within the range of 15-35°C with less ac­curacy.

2.5.2 Humidity/Altitude

The 805 is for laboratory

humidity and altitude specifications have

not been determined for this unit.

2.6 REPACKAGING

If

the Model 805 appears to be operating
incorrectly, refer to the Technical Service
Guide.

a fault with the instrument, please contact

LSCI

or a factory representative for a

returned Goods Authorization

electrical

do

not

expose

fire

the

or

shock

instrument

moisture.

1-1,

the 805 should be

use.

FOR

If

these tests indicate that there is

Relative

SHIPMENT

(RGA)

number

2-4

before returning the instrument to
vice department.

When returning an instrument for service,
photocopy and complete the service Form
found at the back of this manual. The form
should include:

1.

Returned Goods Authorization No.

2.

Instrument Model and Serial Numbers

3.

User's Name, Company, Address, and
Phone Number

4.

Malfunction Symptoms

5.

Description of Measurement system

If

the original carton is available, repack the

in

instrument
carton using original spacers to protect
protruding controls. Seal the carton with
strong paper or nylon tape. Affix shipping

labels and "FRAGILE" warnings.

If

the original carton
the instrument similar to the above proced­ure, being
packing material on
ment.

a plastic bag, place

is

not available, pack

carefut

tousespacers or suitable

all

sides of the instru-

our

it

in

ser-

the

2-5

This Page Intentionally Left Blank

SECTION

OPERATING INSTRUCTIONS

3.1 INTRODUCTION

This section contains information and in­structions concerning the operation of the
Model 805 Temperature Controller. Included

is a description of the front and rear panel

controls and indicators.

3.2 INSTRUMENT CONFIGURATION

3.2.1 Input Modules

The Model 805 can be used with several
different
summarized
be mixed, allowing two different sensor
types to be used with the 805, e.g., both a
diode thermometer and a resistance
mometer could be used on the two inputs,
with the addition of one optional
ule.

input

modules. Thesemodules are

in

Section

I.

Input modules can

input

ther-

mod-

III

Note: A proprietary algorithm

fit

the precision optiondata to within a
few millikelvin over the entire temperature
range.

3.4 CONTROL FUNDAMENTALS

An

application note entitled “Fundamentals
for Usage of Cryogenic Temperature Con­trollers” is included as an appendix in this
manual and should be read in detail
are not familiar with cryogenic temperature
controllers.

3.5 CONTROLS

Figures 3-1 and
plays, annunciators, controls, and connect­ors. The identificationof each item is
keyed in the appropriate figure.

AND

3-2

INDICATORS

identify the805 dis-

is

used

if

you

to

3.3 PRECISION OPTIONS

There are two types
available for
Option is supplied for calibrated sensor(s)
precision optiondata ordered
time as the 805.

The8002 Precision Option is used when the
customer already owns an805 and wants new
sensor calibration data stored in the instru­ment.

PROM

to the customer. The
stalled
When ordering the 8002 Precision

specify the serial number of the 805.

Note that additional calibrations can be
added to
specifying with

time of order, the serial number of the

instrument.

If

factory, its curve number

for the
an addenda

LSCI

chip and sends the programmed chip

a Precision Option is ordered from the

user

the

stores the calibrationdata in a

in

the 805 by thecustomer. Note:

the

instrument at a later time by

and included in themanual as

to

the

of

Precision

805. The 8001 Precision

PROM

the sensor calibration at

will

manual

(see Appendix

Options

at

the same

is then in-

Option,

bespecified

B).

FRONT PANEL DESCRIPTION

3.6 POWER ON/OFF

Before connecting
make sure the rear panel voltage selector is
set to correspond totheavailable power

linevoltage. Be certain the correct fuse is

in

installed

the instrument.

Switch

AC

power to the 805,

3.6.1 POWER UP SEQUENCE

Immediately on POWER ON the 805 runs

through a power upsequence as follows:

1. The Display indicates ±8.8.8.8 and the

%

Heater
annunciators and LED's are turned on.
The LED's include:

CONTROL

four sets of units;

MED,

set point and
present, an ohms indicator; and with an
optional computer interface, the

LOCAL/REMOTE

indicates 188. Inadditionall

SENSOR

SENSOR

HI);+ and

A

and Bas

HEATERPOWER

-; 2 decimal points for

if

a resistance module is

indicators.

A

and

well

(LO,

B,

as

3-1

2.

Next, the
play window and,

unit

displays 805

in

the dis-

if

present, indicates

the IEEE-488 interfaceaddress

HEATER

be changed

%

window. This address can

by

the user and

verifica-

in

the

tion is always given on power-up.

in

Note that any changes

only

address are

recognized and

the IEEE-488

read

by the instrument on power-up.

3. The unit then displays for
the module associated with that

INPUT

A

input

in the display window as well as the

SENSOR

HEATER

A

ID

curvenumber

%

window.

in

the

4. The unit then displays the same in-

5.

formation for Input

The unit then goes into normal opera-

6.

tion.

3.7

3.7.1

The choice of Display

DISPLAY

SENSOR

DISPLAY SENSOR

Block

SENSOR

Input

input is made
by pushbuttons on the front panel which
allows the user to display either input and

indicate by an annunciator the sensor input

which is currently displayed.

3.7.2

The

Units Select

UNITS

key is used

to

change the display

and control units. The key is located below

the lower right corner of

display

win-

the

dow. Pressing the key scrolls the units, i.e.,

K

°F

V

°C

K etc. The selected

are displayed

to the

right of the

units

HEATER

%

power display. The units display light is

blinked to indicate the frequency of display
update.

The temperatureunits for both inputs are

selected by the units buttonandarekept
the same to avoid confusion.

If

an

input

exceeding 3.000 volts (or 6.553
volts for the -6 module) is applied to the
displayed

input,

an overload condition is
present and is indicated by an OL on the
display.

3.7.3.2

The Resistance mode requiresthe -P2,

Resistance Units

-P3,

or -R1 input conversion module(s).

The display ranges and resolutions for the

-P2, -P3 and -R1 are

0

to

2999

and 0.0 to 100.0 ohms respective-

ly.

If

a resistance exceeding

the

applied to

input,

0.0 to

OL

299.9

full

is indicated on

ohms,

scale is

the display.

3.7.3.3

In

kelvin temperature units, the chosen

Temperature Units

input is displayed with a display resolution
of 0.1 degree above 100 kelvin and 0.01

degree between 1

that this is

display

tern resolution or

If

the sensitivity of thesensor is too low

and 100

resolution and not sys-

accuracy

kelvin. Note

of the reading.

to support this resolution, i.e., one bit
corresponds to greater

than the

resolution, some temperatures may

will

ped. This
sensor between

be true for a silicondiode

30

kelvin and

where the sensitivity is approximately

100

above

be

skip-

kelvin

2.5

millivolts per kelvin and the voltage resolu-

tion is 0.046

millivolts.

For this case, the

resulting temperature resolution is 0.046/2.5

=

0.018 kelvin. However, below30 kelvin

the silicon diode sensitivity is approximately

millivolts

25

per kelvin which results in an

approximate resolution of 0.002 kelvin

(0.046/25).

For the Celsius and fahrenheit scales, reso-

0.01

lution is

degree within

their respective zeros and 0.1 degree

100

degrees

out-

of

side this band for either positive or nega­tive temperatures.

3.7.3

3.7.3.1

Display SENSOR Units

Voltage Units

In the voltage mode, the display has a reso-

lution of 1 millivolt and a

full

3.000 volts (6.553 volts for the -6 module).

3-2

scale

input

of

3.7.4

An

averaging algorithm within the instru-

Filtering the Display

ment is available which averages up to ten

readings. This reading mode eliminates
noise within the cryogenic system analogous

a

toaveraging within

digital voltmeter.

This function can be selected
by switch 2 of the
panel for each
shipped from the factory with the filtering
function selected.

The decimal point on the sign digit at the
far left of the display window flags

"Filter-on"

averaging algorithm is being used.

If

the averaging algorithm is used, displayed
temperature is on the average of somewhere
between
temperature variation.

in

temperature is observed, averaging is
disabled and the last calculated reading is
displayed. As the disturbance is reduced
value, the averaging gradually increases

a total of ten readings areconsidered.

3.8

3.8.1

The choice of

SOR

is made
on the rear panel. This switch chooses
either INPUT

lights the appropriate display light on the

front panel.

3.8.2

and

1

and ten readings depending on the

CONTROL BLOCK

CONTROL SENSOR

by

SET-POINT

SENSOR

input

input

A

separately. The805 is

will

indicate whether the

for the CONTROL

a switch labeled

or INPUT B for control and

or deselected

ID

on the back

If

an

abrupt

CONTROL

change

in

until

SEN-

The resistance

Section 3.8.2.2.

above the appropriate resistance
ohms is set, the set-point is set
equivalent to zero resistance

lent) which shuts down the output stage.

The

+/-

key is used to toggle the set-point

plus or minus when

+/-

key is inactive when

these units are always positive.

3.8.3

The

justment of overall

range of

clockwise. Logarithmic scaling is used;

therefore a gain setting of
mately two-thirds of

Figure 3-3a for nominal values.

3.8.4

The

function of the controller in beats per

second. One

period. The settings range from

per second

second

scale. Detented counterclockwise setting is

off. Refer to Figure
values.

GAIN

GAIN

(proportional) knoballows ad-

1

RESET

RESET

(full

knob adjuststhe reset (integral)

limit

to 1000. Maximum gain is full

beat

(1

000

clockwise) on a logarithmic

ranges are given

If

a resistance set-point

in

software

(0

K

in

°C

or

°F

only. The

in

K,

V

or R since

controller gain

×100

is approxi-

full

rotation.

equals one integration

0.001

seconds) to 1 beat per

3-3b

for nominal

in

limit

in

equiva-

in

the

Refer to

beats

Set-point selection is made via thumbwheel
switches on the front panel. The set-point

in

in-

soft-

switches, which provide a continuous
dication of the set-point value, enable the
user to quickly and easily determine whether
his system is at the control temperature.

The temperature set-point has the same units
and range as the display sensor. The
selected units are annunciated on the front
panel. The set-point limits
by the sensor curve being used for the con-

trol sensor input.

If

a selected temperature set-point is outside
of the control sensor's response curve temp­erature range, the set-point is set

0

ware equivalent to

the heater output stage and the output

0

meter reads
of range set-point.

3-4

and blinks to indicateanout

K

are determined

which shuts down

Table

SETTING

-

3-1.

LLX

%

TIME

0.5

1.0

(100)

5.0

10

(101)

50

100

3.8.5

The

in

per cent of power
of maximum current
switch
switch package

HEATER

HEATER

%display can be set to read

#1

of the internal configuration dip

%

[I/Imax]2

S4

which is located on the

Reset

Settings

(SEC)

OFT

1000

300

100

30

10

3

1

by

the position of

0.001

0.003

0.01

0.03

0.1

0.3

1.

or percent

BFS

-

Figure

3-3.

Nominal Cain

and

Reset Settings

3-3a.

The power output stage can

by

depressing the
whose annunciator is on. This action turns
off the output power independent of the

set-point andthe

3.9

If

either the IEEE-488 option or the
232C option is present
the
toggles the 805 between

LOCAL

LOCAL

returned to
curve number for the display
cated.

When placed
under remote control and the front panel
controls are disabled. The display shows the

IEEE-488 address when placed in remote
the key is held down for over one second.

Nominal

LOCAL/REMOTE OPERATION

input

DISPLAY

operation.

indicates front-panel control. When

Gain

control parameters.

key currently chosen

LOCAL,

in

REMOTE,

Settings

be

turned

LO,

MED

or

HI

button

in

the 805, pressing

REMOTE

the display shows the

SENSOR

the controller is

indi-

OFF

RS-

and

if

3-3b.

3.11

The heater power output is rated at one
ampere dc with a 25 volt compliance. The
grey
black
black
be tied to the
mally not be used.

3.12

The connections for the

MONITORS

3.13

The 805 software interrogates the appropri­ate
determine
Option curve has been selected
5-8).
position are given
switch functions are defined

HEATER

(HI)

(LO)

(GND)

SENSORS/MONITORS

SENSOR CURVE SELECTION

SENSOR

The standard curves and their switch

Table

Nominal Reset Settings

(Beats/Second)

Power

terminal is the

terminal is the Low side. The

terminal,

LO

plug is given

ID

switch

which

standard curve or Precision

3-2.

Output

high

if

connected, should

terminal.

in

(i.e.,

in

Table3-2. The

Standard

Terminals

side and the

It

will

SENSORS/

Table

A

or

(Switches

in

Figure 3-4.

Curve

nor-

2-2.

B)

to

ID

Information

REAR PANEL DESCRIPTION.

3.10

The

INPUT

the control section of the controller. Since
this
switch, this choice can not be
either of the optional computer interfaces.

CONTROL Switch

CONTROL

A

selection ishard-wiredthrough

switch selects either the

or INPUT B signal to be fed to

3-6

the

changed over

Curve

No.

00

01
02
03
04

Switch

5678

0000

0001

0010
0011
0100

1
1
1

14

1

Range

-

324.9

-

324.9

-

324.9

-

799.9

-

474.9

(K)

DRC-D

DRC-E1

CRV

10

DIN-PT

CRV

10