Lake Shore 805 User manual

User’s Manual
Model 805
Temperature Controller
This manualappliesto instrumentswith SerialNumbersfrom 0 to 17999.
Obsolete Notice:
This manualdescribesan obsoleteLakeShore product.This manual isa copy from our archives
and may not exactly matchyour instrument. LakeShore assumes no responsibilityfor this
manualmatchingyour exact hardwarerevisionor operationalprocedures.Lake Shore is not
responsiblefor any repairs madeto the instrumentbasedon informationfrom this manual.
Lake Shore Cryotronics,Inc.
575 McCorkleBlvd.
Westerville, Ohio43082-8888 USA
InternetAddresses:
[email protected]
[email protected]
Visit OurWebsite:
www.lakeshore.com
Fax:[phone]
Telephone: [phone]
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
US. 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
consequentialdamages in connection with furnishing, performance,or use
of this material.
Obsolete Manual
April 1988

TABLE OF CONTENTS
SECTION I GENERAL lNFORMATION
1.1 INTRODUCTION 1-1
1.2 DESCRIPTION..
1-1
1.3 INPUT CONVERSION MODULES 1-3
1.4 SPECIFICATIONS 1-3
SFKXTON II IN-ON
2.1 INTRODUCTION 2-1
2.2
INITIAL INSPECTION 2-1
2.3 PREPARATION FOR USE 2-1
2.3.1 Power Requirements 2-1
2.3.2 Power
Cord. 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
2.3.8 SENSOR ID Switches 2-3
2.3.9 Heater Power 2-4
2.4 OPTIONS.. 2-4
2.4.1 Model 8053 RS-232C Option 2-4
2.4.2 Model 8054 IEEE-488 option 2 -4
2.3.7 Sensor Output Monitors 2-3
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 2-5
2.6 REPACKAGING FOR SHIPMENT
2-5
SECTION III OPERATING INSTRUCTIONS
3-1
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 3-1
3.5 CONTROLS AND INDICATORS 3-1
FRONT PANEL DESCRIPTION
3-1
3.6.1 POWER-UP Sequence 3-1
3-2
3.7.1 Display SENSOR Input
3-2
3.7.2 Units Select 3-2
3.7.3 Display SENSOR Units 3-2
3.6
POWER ON/OFF Switch
3.7 DISPLAY SENSOR Block

TABLE OF CONTENTS, CONT'D
3.7.3.1 Voltage Units 3-2
3.7.3.2 Resistance Units 3-2
3.7.3.3 Temperature Units 3-2
3.7.4 Filtering the Display. 3-4
3.8 CONTROL
BLOCK. 3-4
3.8.1 CONTROL SENSOR 3-4
3.8.2 SETPOINT 3-4
3.8.3 GAIN.. 3-5
3.8.4
RESET 3-5
3.8.5
HEATER% 3-5
3.8.6 HEATERPOWER
Range 3-5
3.9
LOCAL/REMOTE SELECTION 3-5
REAR PANEL DESCRIPTION
3.10 CONTROL Switch 3-6
3.11
HEATER Power Output Terminals 3-6
3.12 SENSORS/MONITORS 3-6
3.13 SENSOR
CURVE SELECTION 3-6
3.13.2 The Precision Option Table 3-8
3.14 SENSOR ID Switches 3-8
3.13.1 Display of Accessed Curve 3-6
SECTION IV REMOTE OPERATION
4.1 IEEE-488 INTERFACE (OPTION8054) 4-1
4.2 GENERAL IEEE SPECIFICATIONS
AND OPERATION 4-1
4.3 INTERFACE CAPABILITIES 4-2
4.4 MODEL 805 IEEE-488 ADDRESS SWITCH 4-3
4.4.1 Terminating Characters (delimiters). 4-3
4.4.2
TALKER and/or LISTENER Configuration 4-3
4.4.3
The IEEE-488 INTERFACE bus address 4-5
4.5 IEEE-488
BUS COMMANDS 4-5
4.5.1 Uniline Commands 4-5
4.5.2 Universal Commands 4-5
4.5.3 Addressed Commands 4-6
4.5.4 Unaddress Commands 4-6
4.5.5 Device-Dependent Commands 4-6
4.5.6 Talker and Listener Status 4-6
4.6 PROGRAMMING INSTRUCTIONS 4-6
4.6.1 Commands and Requests 4-7
4.7 INSTRUMENT SETUP
COMMANDS AND REQUESTS 4-7
4.7.1 EOI Status The ZN1 Command 4-7
4.7.2 Interface Mode
The MN1 Command 4-7
4.7.3 Terminating Characters
The TN1 Command 4-8
4.7.2.1
Local 4 -7
4.7.2.2 Remote 4-8
4.7.2.3
Local Lockout 4-8

TABLE OF CONTENTS, CONT'D
4.7.4 Clear 4-8
4.7.5
The vvW2vv Data String 4-10
4.7.6
The "WI" Data String 4-10
4.8
SELECTION OF SET POINT UNITS AND DISPLAY SENSOR (Table 4-7) 4-10
4.8.1
Units for Set Point The F0C1 Command 4-10
4.8.2
Display Sensor Selection The F1A and F1B Commands 4-10
4.8.3
The A and B SENSOR ID Information The AC1C2 and
4.8.4 The Sensor ID on Return to Local 4-10
4.8.5
The "W1" Data String 4-10
4.9.1
The Set Point Value The S Command 4-12
4.9.2
The "WP" Request Data String 4-12
4.9.3
Setting the GAIN The P Command 4-12
4.9.4
Setting the RESET (Integral) The I Command 4-12
4.9.5
Heater Range The R Command 4-12
4.9.6
Note: The Return to Local 4-12
4.9.7
The "W3" Data String 4-13
4.10.1
Output Data Statemants 4-15
4.10.2
The "W0" Data String 4-15
4.11.1 HP86B
Keyboard Interactive Program 4-16
4.11.2
National Instruments GWBASIC or BASICA IBM Example 4-16
4.11.3
National Instruments QUICK BASIC IBM Example 4-16
4.11.4 HP86B
Bus Commands Program 4-16
BC1C2 Comands 4-10
4.9
THE CONTROL COMMANDS 4-12
4.10
COMMAND OPERATIONS 4-13
4.11
SAMPLE PROGRAMMING 4-16
SECTION V MAINTENANCE
5.1 INTRODUCTION 5-1
5.2
GENERALMAINTENANCE.. 5-1
5.3
FUSE REPLACEMENT 5-1
5.4
LINE VOLTAGE SELECTION 5-1
5.5 OPERATIONAL, CHECKS 5-2
5.5.1
Test Connector. 5-2
5.5.2
Operational Test Procedure... 5-2
5.5.3
Current Source Check. 5-2
5.5.4
Temperature Display 5-2
5.5.4.1
Determine Input Type 5-2
5.5.4.2
CheckUnits Display. 5-2
5.5.4.3
Check Sensor Units Reading 5-2
5.5.4.4
Check Temperature Reading. 5-3
5.5.4.5
Check Input B. 5-3
5.5.5
Heater Output Test. 5-3
5.5.5.1
Heater Output Conditions 5-3
5.5.5.2
Test Setup 5-3
5.5.5.3
The Heater Display 5-3
5.5.6
Checking Gain and Reset 5-3

TABLE OF CONTENTS, CONT'D
5.5.6.1 Gain 5-3
5.5.6.2 Reset. 5-3
5.5.7 Checking the Heater Ranges. 5-4
5.5.7.1 Standard 25 Watt Output. 5-4
5.5.7.2 W60 60 Watt option 5-4
5.6 CALIBRATION.. 5-4
5.6.1 Sensor Input Module Calibration 5-4
5.6.2 Current Source Calibration. 5-4
5.6.3 A/D Converter Calibration 5-4
5.6.4 Set Point Calibration 5-5
5.6.5 Heater Meter Calibration. 5-5
5.6.6 Output Current Adjust 5-5
5.7 TROUBLESHOOTING 5-5
5.7.1 Checking the Temperature Reading. 5-5
5.7.1.1 Sensor
Current 5-5
5.7.1.2 Monitor Voltage. 5-5
5.7.1.3 Display Voltage
or Resistance. 5-5
Reading is Incorrect 5-5
5.7.2 Checking Setpoint Voltage 5-6
5.7.3 Checking the Gain and
Reset 5-6
5.7.3.1 Gain. 5-6
5.7.3.2 Reset. 5-6
5.7.3.3 The
Sum of the Gain and the Reset. 5-6
5.7.4 Checking the Heater Circuit 5-6
5.6.4 Set
Point Calibration 5-5
5.7.1.4 Units Display
is Correct But Temperature
SECTION
VI OPTION AND ACCESSORY INFORMATION
6.1 INTRODUCTION 6-1
6.2 OPTION
INPUT MODULES 6-1
6.3 ACCESSORIES 6-1
6.3.1 Model 805 Connector
Kit 6-1
6.3.3 8072 IEEE-488 Interface Cable 6-1
6.3.4 8271-11 Sensor/Heater Cable 6-1
6.3.5 8271-12 Sensor/Heater/Output Cable. 6-2
6.4
OUTPUT POWER OPTION 6-2
6.4.1 W60 Output Stage. 6-2
6.5 INTERFACE OPTIONS 6-2
6.5.1 Model 8053 RS-232C Interface. 6-2
6.5.2 Model 8054 IEEE-488 Interface 6-2
6.5.3 Model 8055 Analog Output Option 6-2
APPENDIX
A Standard Curves A-1
6.3.2 RM-3H1/3H2
Rack Mount Kits. 6-1
APPENDIX C Error Codes C-1

LIST OF TABLES AND ILLUSTRATIONS
SECTION I - GENERAL INFORMATION
Table 1-1.
Input Conversion Modules, Model 805. 1-3
Table 1-2.
Specifications, Model 805 Temperature Controller 1-5
SECTION II - IN-ON
Table 2-1. Line Voltage Selection 2-1
Figure 2-1.
Typical Rack Configuration 2 -2
Table 2-2. J1
SENSORS/MONITORS Connections 2-2
Figure 2-2.
Sensor Connections 2-3
Figure 2-3.
Sensor ID Definitions 2-3
Table 2-3. SENSOR ID Curve Address 2-4
SECTION
III - OPERATING INSTRUCTIONS
Figure 3-1. Model 805 Temperature Controller Front Panel 3-3
Table 3-1. Reset Settings.. 3-5
Figure 3-2. Model 805 Temperature Controller Rear Panel
3-7
Figure 3-3. Nominal Gain and Reset Settings 3-6
Table 3-2. Standard Curve Information 3-6
Table 3-3. Sensor Curve Information Precision Option Table. 3-8
SECTION
IV REMOTE OPERATION
Table 4-1. Interface Functions. 4-2
Figure 4-1. IEEE-488 Address Switch for the Model 805. 4-3
Table 4-2. Allowable Address Codes for the 805 4-4
Table 4-3. IEEE-488 Bus Commands. 4-5
Table 4-4. Model 805 Command Summary of Instrument Setup. 4-7
Table 4-5. Model 805 Summary of Output Requests. 4-8
Table 4-6. Model 805 Interface Setup Commands and Request Status. 4-9
Table 4-7. Model 805 Command Summary for Instrument Setup. 4-11
Table 4-8. Model 805 Command/Request Summary for Setpoint Setup. 4-13
Table 4-9. Model 805 Command/Request Summary for the Control
Parameters
4-14
Table 4-10.Model 805 Output Data Statements. 4-15
SECTION V MAINTENANCE
Table 5-1. Input Card Characteristics. 5-8
SECTION
VI OPTION AND ACCESSORY INFORMATION
Table 6-1.
Option and Accessories for 805 Temperature Controller .
6-1

Model 805
SECTION I
GENERAL INFORMATION
section I
1.1 INTRODUCTION Shore DT-470 Series Temperature
Sensors.
All DT-470 Sensors
The information contained in this follow the same temperature
operations manual is for the response curve. Four bands of
installation, operation, remote tracking accuracy are offered
so
programming and option and acces- that sensor selection may be made
sory information for the Lake Shore with both technical and economical
Cryotronics, Inc. Model
805 considerations for any given
Temperature Controller. This application. Low temperature
(2 to
manual also contains performance nd
100K) accuracies range from 0.25K
calibration procedures, schematics, for band 11 to 1K for band 13. For
component layouts and a replaceable more demanding requirements,
DT-470
parts list. Sensors can be individually
calibrated to accuracies of better
This section contains general than
50 millikelvin depending on
information for the Lake Shore temperature range.
Cryotronics, Inc.
805 Temperature
Controller. Included is an Diode sensor voltages are digitized
instrument description, specifica- with a resolution of
100 microvolts
tions, instrument identification, out of
3 volts full scale. For the
option and accessory information. display, temperature is rounded to
0.1 kelvin above 100 kelvin, and to
1.2 DESCRIPTION 0.01 kelvin below 100 kelvin.
The
805 Temperature Controller is a For greater precision individual
microprocessor based instrument sensor calibrations can be accom-
which provides true analog control. modated through the
8001 Precision
It accepts inputs from up to two Calibration option which programs
sensors and displays the tempera- the instrument with a particular
ture with up to
4 digits of response curve. The algorithm
resolution in
K, °C or °F. It within the instrument interpolates
displays voltage for diodes to
1 between data points to an inter-
millivolt, and
ohms for resistors polation accuracy which exceeds
to four places.
0.01K over the entire temperature
range of the Precision Option. The
The dual sensor input allows the analog-to-digital converter is
user to monitor temperature at more accurate to plus or minus the least
than one point. Sensor select significant bit, which for the
470
pushbuttons on the front panel series sensor results in an uncer-
enable the user to display either tainty of
1mK below 28K and 45mK
input at will. The system control above 40K with a transitional
sensor is selected via a rear-panel region between the two tempera-
toggle switch with the choice tures. Therefore, at temperatures
indicated on the front panel. This below
28K, the overall system
choice is independent of display accuracy, the
sum of the instrument
status. accuracy
(11mk) and that of the
calibration itself (Lake Shore
The Model
805 is direct reading in calibrations are typically better
temperature when used with the Lake than
20mK within this region) is ±
1-1

section I
Model 805
0.03K. Above 28K, system accuracy
gradually moderates to a typical
value of
±75mK above 40K. See the
Lake Shore Cryotronics, Inc. Low
Temperature 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 of the
SENSOR ID dip switch on the back
panel for a given input if the user
prefers not to average readings.
A
decimal point at the upper left of
the display indicates that averag-
ing
is on.
The Model
805 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) resistors. The
DIN curve is standard within the
instrument and
is called up
automatically unless a precision
option is present for the platinum
resistor. The accuracy of the
reading
is dictated by the sensor
and its conformity to the DIN
curve. The tolerance on these
devices
is given on the technical
data sheet for the Lake Shore
PT-
100 series sensors. The combined
accuracy of the instrument and a
calibrated resistor with a preci-
sion option is on the order
of 40mK
over the useful range of the sensor
(above
40K for the platinum). Note
that a precision option
is required
for a rhodium-iron or a
TG-120 to
read correctly in temperature.
These input conversion modules are
easily installed by the user; thus,
1-2
units can be modified to satisfy
changing requirements.
The ample memory space provided in
the
805 allows several response
curves to
be stored in one instru-
ment. Depending on the complexity
of the curves, up to ten can be
programmed into the unit by Lake
Shore. The
SENSOR ID switches are
used to select which particular
sensor response curve is to
be used
with each input. Thus, the user
is
able to make sensor changes at will
even when different response curves
are required.
The data for calibrated sensors can
be stored within the instrument by
means of the
8001 Precision option.
Each curve can contain up to
99
sensor unit-temperature data
points. With the standard preci-
sion option format, which consists
of
31 data points and a 20 charac-
ter information line, up to ten
curves can be stored in the unit.
See Section
3-3 for more descrip-
tion.
Although voltage (resistance)-
temperature data points are stored
as a table, interpolation within
the instrument results in the
equivalent of a high order polyno-
mial calculation in the converting
of the input voltage (or resis-
tance) to temperature. This is
done by means of a proprietary
algorithm developed at Lake Shore
Cryotronics, Inc.
The control temperature set-point
selection is made via thumbwheel
switches on the front panel of the
instrument.
The set-point switch-
es, 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])

Model 805
The control section of the 805
provides two-term temperature
control. Proportional
(GAIN) and
integral (RESET) are individually
tuned via front-panel potentio-
meters. The gain and reset
settings are in nominal log per
cent.
Analog heater output of the
805
Temperature Controller is a maximum
of
25 watts when a 25 ohm heater 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 the
805 can be
attenuated in
two steps of a decade
each. When greater power output
is
required, an optional 60 watt power
output stage
is available (W60)
which is designed for a 25 ohm
load. It is rated at a nominal 1.5
amperes with a compliance of 43
volts.
An optional IEEE-488 (Model 8054)
or RS-232C (Model 8053) interface
is available for the
805. Either
interface can
be used to remotely
control all front-panel functions.
section
I
1.3 INPUT CONVERSION MODULES
The input conversion modules for
the
805 Controller are listed in
Table
1-1.
1.4 SPECIFICATIONS
Instrument specifications are
listed in Table
1-2. These
specifications are the performance
standards or limits against which
the instrument
is tested.
Option ports are designed into the
805 to ease the addition of
interfaces and outputs. The Model
805 has two option ports which
allow up to
two options to be used
simultaneously (see limitations
below). The options are easily
installed by the user: thus, units
can
be changed or upgraded to
satisfy changing requirements.
Only one computer interface can be
installed in the
805 due to space
limitations in the
805 rear-panel.
The Model
8055 Analog Output option
is available to provide an analog
output of 10mV/K independent of the
display temperature units. If the
display is in sensor units, the
output for diodes is 1V/V; for
100
ohm platinum, 10mV/ohm; for 1000
ohm platinum, 1mV/ohm: for rhodium-
iron, 100mv/ohm.
Table 1-1. Input Conversion Modules, Model 805 Temperature Controller
Diode
or Resistance Sensor
(ordered separately):
DIODE SENSOR CONFIGURATION
Diode Excitation: DC current
Source.
10 microamperes (±0. 005%) .
AC noise from current source less
than 0.01% of
DC current.
Diode Voltage/Temperature Range:
0.000 to 3.000 volts in standard
configuration. Dependent on Sensor
selected. DT-470-SD covers
temperature range from
1.4 to 475
kelvin. Refer to Table 3-2 for
other diode temperature limita-
tions.
Display Resolution: 1mV or up to
four digits and resolution of
0.01
units in temperature.
Diode Response
Curve(s): The
silicon diode series DT-470 Curve
#10 as well as the series DT-500
DRC-D and DRC-E curves are present
in the
805. Curves to match other
existing Sensors are available on
request.
1-3

section I
Diode Sensor mer Dissipation:
Dissipation is the product of
Sensor Excitation Current
10uA) and
Resultant Sensor Voltage.
Accuracy : Unit reads sensor
voltage to an accuracy of better
than 0.1mV. Equivalent temperature
accuracy
is a function of Sensor
type, temperature (sensitivity) and
calibration of Sensor. See the
Technical
Data Sheet for the DT-470
Series Temperature Sensors and the
Model 8001 Precision Option for
accuracy with LSCI calibrated
Sensors.
6-VOLT DIODE SENSOR MODULE
805-6 Diode Sensor Input Module.
Similar to standard configuration
but has
0 to 6 volt input to
accommodate TG-120 Series Sensors.
Converts either Input A or Input
B
(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 read
correctly in temperature. This
module may be field installed.
100 OHM PLATINUM MODULE
805-P2 100 Ohm Platinum Sensor
Module:
Converts either Input A or
B (or both with two modules) to
accommodate 100
ohm Platinum RTD
Sensors. This module may
be field
installed.
Sensor Excitation: 1.0 mA
(±0. 005%) .
Temperature/Resistance Range:
Temperature range depends on
Sensor. Resistance displayed from
0.0 to 300.0 ohms.
Resolution: 0.01 ohm or equivalent
temperature.
Model 805
Sensor (order separately):
Configuration optimized for PT100
Series Platinum Sensors or any
other 100
ohm (at 0°C) positive
temperature coefficient Sensor.
Sensor Response Curve: Platinum
Sensor response curve
is based on
0.1% interchangeability at 0°C and
temperature coefficient (0-100°C)
of 0.00385/°C. Accuracy conforms
to DIN 43760 tolerances plus
display (electronics). Special
calibrations can be accommodated
with 8001 Precision Option.
Sensor Power Dissipation: Dissipa-
tion
is the product of sensor
excitation current squared and the
Sensor resistance.
1000 om PLATINUM MODULE
805-P3 1000 Ohm Platinum Sensor
Module: Essentially the same as
the -P2 except accommodates 1000
ohm Platinum Sensor (or any other
1000 ohm metallic sensor). Sensor
excitation is
0.1 milliampere.
Unit reads resistance in
ohms and
displays
0. to 3000 ohms. Accuracy
is 0.1 ohm or equivalent tempera-
ture.
27 OHM RHODIUH-IRON MODULE
805-R1 27-ohm Rhodium-Iron Sensor
Module: Essentially the same as-
P2 except accommodates RF-800-4
Rhodium-Iron Sensor. Sensor
excitation is
1mA. Unit reads
resistance in
ohms and displays
0.00 to 99.99 ohms. Requires
calibrated sensor and programmed
calibration to read temperature.
Accuracy and resolution
is 0.003
ohms or equivalent temperature.
1-4

Model 805 section
I
Table 1-2. Specifications, Model 805 Temperature Controller
INPUT CHARACTERISTICS:
Inputs: Two Sensor Inputs.
Control Sensor
(A or B) selected
via rear panel switch and indicated
on the front panel. Display sensor
(A or B)
can be selected from front
panel or interface, independent of
control sensor. The input charac-
teristics are a function of Input
Conversion Module Installed. The
805 can accommodate separate input
modules for the
A and B input.
This allows concurrent use of
different sensor types.
Input Conversion Modules: Standard
configuration for the
805 is both
inputs set up to use DT-470 series
silicon diode sensors (0-3V)
.
Optional input conversion modules
allow the
805 to be used with TG-
120 series diode sensors (0-6V), as
well as
PT-100 series 100/1000 ohm
platinum RTD's, and RF-800 series
rhodium-iron sensors.
Input Conversion Module Sensor Type
(one per input)
-6* 6 volt diodes
(e.g. TG-120)
-P2
100 ohm Platinum
-P3; 1000 ohm Platinum
-R1
27 ohm rhodium-iron
* To read correctly in a
temperature scale,these modules
require the use of calibrated
sensors and the
8001 Precision
option for the
805.
Sensors: Ordered Separately. 805
with input conversion modules will
handle all types of diodes as well
as platinum and rhodium-iron RTD's
and other positive temperature
coefficient resistors with proper
choice of input. See the Lake
Shore 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: 4-digit LED Display of
Sensor reading in Sensor Units
(Volts or
Ohms) or temperature in
K, °C, or
°F shown with annun-
ciators.
Display Resolution: 0.1K above
100K, 0.01K below 100K; voltage for
diodes to
1 mV and ohms for resis-
tors to four places.
Temperature Accuracy: Dependent on
Sensor Input and Sensor. See Input
Options available.
Temperature Range: Dependent on
Input Conversion Module
and Sensor.
TEMPERATURE CONTROL:
set point: Digital thumbwheel
selection in kelvin, celsius,
fahrenheit, or volts
(ohms with
resistance option).
Set Point Resolution: Same units
as display.
In voltage:
In
ohms:
0.000 to 9.999 volts.
805-P2:
0.0 to 999.9 ohms.
805-P3: 0.0 to 9999 ohms.
805-R1: 0.0 to 99.9 ohms.
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.
1-5

section I Model 805
Heater output: Up to 25 watts Response time (electronics):
(1A,25V) available. Three output Display update cycle time of less
ranges can
be selected either from than 1 second (650 msec typical).
front-panel or from optional
2 seconds (3 readings) on channel
computer interface and provide ap-
proximate decade step reductions of
maximum power output. Optional
60 IEEE-488 Interface Option: Allows
watt,
1.5 ampere 25 ohm output remote control of setpoint, gain,
(Option W60)
is available for the reset, units, display sensor and
805 only as a factory installed heater power range. Provides output
option. of display, display units and all
Heater output Monitor: LED display
continuouslyshows heater output as
RS-232C Interface Option: Controls
a percentage of output range with a same parameters as IEEE-488
resolution of
1%. Interface.
Control
Sensor: Either Sensor Dimensions, Weight: 216mm wide
Input (selected from rear panel).
GENERAL: (12 pounds).
Sensor Voltage Monitor: Buffered
Power: 100, 120, 220 or 240 VAC
output of each diode sensor voltage (selected via rear panel with
for standard configuration. For
-6 instrument off), 50 or 60 Hz, 75
option module, voltage output times
0.455. For positive temperature
coefficient modules (-P2, -P3, Accessories Supplied: Mating
-R1), buffer is sensor voltage connector for sensor/monitor
output times
(-10).
change or step change.
front panel functions.
x
102mm high x 381mm deep (8.5in.
x 4in. x 15in.), 5.5 kilograms
watts.
connector, operations manual.
1-6

Model 805
section II
SECTION II
INSTALLATION
2.1 INTRODUCTION 2.3 PREPARATION FOR USE
This Section contains information 2.3.1 Power Requirements
and instructions pertaining to
instrument set-up. Included are The Model
805 requires a power
inspection procedures, power and source of
100, 120, 220 or 240 VAC
grounding requirements, environ-
(+5%, -10%), 50 to 60 Hz single
mental information, bench and rack phase.
mounting instructions, a descrip-
CAUTION
tion of interface connectors, and
repackaging instructions.
2.2 lNITIAL INSPECTION
This instrument was electrically,
mechanically and functionally in-
spected prior to shipment. It
should be free from mechanical
damage,
and in perfect working
order upon receipt. To confirm
this, the instrument should be
visually inspected for damage and
tested electrically to detect any
2.3.2 Power Cord
concealed damage upon receipt. Be
sure to inventory all components A three-prong detachable 120 VAC
supplied before discarding any power cord which mates with the
shipping materials. If there is rear panel UL/IEC/ICEE Standard
damage to the instrument in tran- plug is included with
805.
sit, be sure to file appropriate
claims promptly with the carrier,
2.3.3 Grounding Requirements
and/or insurance company. Please
advise Lake Shore Cryotronics, Inc. To protect operating personnel, the
of such filings. In case of parts National Electrical Manufacturer's
shortages, advise LSCI immediately. Association
(NEMA) recommends, and
LSCI can not be responsible for any some local codes require, instru-
missing parts unless notified with- This
in
30 days of shipment. The stan- instrument is equipped with a
dard Lake Shore Cryotronics Warran- three-conductor power cable which,
ty is given on the first page of when plugged into an appropriate
this manual. receptacle, grounds the instrument.
ment cabinets to be grounded.
Verify that the AC Line Voltage
Selection Wheel (Figure 3-2,Key
1)
located on the rear panel of the
Model
805 is set to the AC voltage
to be used (Table
2-1) and that
the proper fuse is installed
before inserting the power cord
and turning on the instrument.
If a
W60 option is present,
the
fuse ratings in Table
2-1 double.
Table 2-1. Line Voltage Selection
Line Voltage (Volts) Operating Range (Volts)
Fuse (A)
100
12
0
220
240
90-105
108-126
198-231
216-252
2
- SB
2 - SB
1 - SB
1 - SB
2-1

Section II
Model 805
Figure 2-1. Typical Rack Configuration
2.3.4 Bench Use using the optional RM-3H1 or RM-3H2
rack mounting kit. A typical RM-
The 805 is shipped with feet and a 3H1 rack kit installations with
tilt stand installed and is ready handles is shown in Figure
2-1.
for use as a bench instrument. The
front of the instrument may be 2.3.6 Sensor Input Connections
elevated for convenience of opera-
tion and viewing by extending the The Model
805 is supplied with a 24
tilt stand. pin rear panel mounted D-style con-
nector for the connection of
two
2.3.5 RackMounting sensors. The connection definition
for the sensor(s) is given in Table
The
805 can be installed in a stan- 2-2 and is shown in Figure 2-2.
dard 19 inch instrument rack by
Table 2-2. J1 SENSORS/MONITORS 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

Model 805
Figure 2-2. Sensor Connections.
The use of a four wire connection
(Figure 2-2a)
is highly recommended
for resistive elements to avoid
introducing IR drops in the voltage
sensing pair which translates into
a temperature measurement error.
An alternate two line wiring method
(Terminals 1 and 13 shorted to each
other, 2 and 14 shorted to each
other) may be
used for the DT-470
and TG-120 series diodes in less
critical applications where lead
resistance is small and small read-
out errors can be tolerated (b)
.
Measurement errors due to lead
resistance for a two lead diode
hook-up can
be calculated using;
T
= IR/[dV/dT] where I is the
sensor current of 10 microamperes,
R
is the total lead resistance;
dV/dT is the diode sensitivity and
T is the measurement error. For
example,
R = 250 ohms with dV/dT =
2.5 millivolts/kelvin results in a
temperature error of
1 kelvin. Two
wire connections are not recom-
mended for other sensor types.
The Lake Shore Cryotronics, Inc.
QL-36 QUAD-LEAD™ 36 gauge cryo-
genic wire is ideal for connections
to the sensor since the four leads
are
run together and color coded.
section II
The wire is phosphor Bronze with a
formvar insulation and butryral
bonding between the four leads.
2.3.7 Sensor Output Monitors
Voltage monitor outputs of both
Sensor
A and Sensor B are available
from the same connector on the back
of the instrument. This connector
also carries the Model 8055 Analog
Output Option when present. The
connector pin definitions are given
in Table 2-2.
2.3.8 SENSOR ID Switches
The SENSOR A ID and SENSOR B ID
switches are used to select stored
sensor curves and to activate or
deactivate digital filtering. The
SENSOR ID switch information is
described in Table 2-3 and
Figure
2-3.
Figure 2-3. SENSOR ID Definitions
SENSOR ID SENSOR ID
Input
A Input B
Switch
1
2
3
4
5
6
7
8
Setting Description
Reserved
OPEN Continuous Update
CLOSED Digital Filter On
Reserved
Reserved
Curve Bit
3
Curve Bit 2
Curve Bit 1
Curve Bit
0
2-3

section II
Model. 805
Table 2-3 gives the position of the
ID switches to call up standard
curves stored in the instrument.
Information on Precision option
Curves is given in Appendix
B.
Curve #2 and Curve #4 differ in
that Curve
#2 has an upper tempera-
ture limit of
325K which limits the
set point between
0 and 325K while
Curve
#4 has an upper limit of 475K
and a corresponding upper limit for
the set point.
Table 2-3.
SENSOR ID Curve Address
SENSOR ID Switch Curve Description
45678 Curve#
00000
00001
00010
00011
00100
00
01
02
03
04
DRC-D
DRC-E1
CRV 10
DIN-PT
CRV 10
Refer to SECTION III for more
information on sensor selection and
the operation of the SENSOR ID
switches.
2.3.9 Heater Power
The heater output leads should be
electrically isolated from the sen-
sor(~) ground(s) to preclude the
possibility of any of the heater
current affecting the sensor input
signal. The heater leads should not
run coincident with the sensor
leads due to the possibility of
capacitive pick-up between the two
sets of leads. If they are in
close proximity, they should be
wound
so as to cross the sensor
leads at ninety degrees if at all
possible.
The heater output is a current
drive and does not have to be
fused. The
805 is designed to work
with a
25 ohm heater for maximum
heater output
(25 watts). If a
smaller resistance is used, the
maximum heater power corresponds to
the heater resistance, i.e.,
10
2-4
ohms yields 10 watts. A larger
heater resistance can also
be used
with the
805. For example, since
the compliance voltage is slightly
above
25 volts; a 50 ohm heater
would result in a maximum power
output of
12.5 watts [ (25)2/50].
An optional (W60) output power
stage of
60 watts is available for
the
805. This output is also set
up for a
25 ohm load with a maximum
current of
1.5 amperes at a com-
pliance voltage of approximately
43
volts.
Lake Shore recommends a
30 gauge
stranded copper lead wire (Model
ND-30)
for use as lead wires to the
heater.
2.4 OPTIONS
2.4.1 Model 8053 RS-232C INTERFACE
Option. The RS-232C option is
described in Section
VI of this
manual.
2.4.2 Model 8054 IEEE-488 INTER-
FACE Option. The IEEE option is
described in Section
VI of this
manual.
2.4.3 Model 8055 Linear Analog
Output Option. The Linear Analog
Option is described in Section VI
of this Manual.
2.5 ENVlRONMENTALREQUIREMENTS
WARNING
To prevent electrical fire or
shock hazards, do not expose the
instrument to excess moisture.
2.5.1 Operating Temperature
In order to meet and maintain the
specifications in Table
1-1, the
805 should be operated at an am-
bient temperature range of
23°C _+
5°C. The unit may be operated
within the range of
15-35°C with
less accuracy.

Model 805
2.5. 2 Humidity/Altitude
The 805 is for laboratory use.
Relative humidity and altitude
specifications have not been deter-
mined for this unit.
2.6 REPACKAGING FOR SHIPMENT
If the Model 805 appears to be
operating incorrectly, refer to the
Section
V. If these tests indicate
that there is a fault with the
instrument, please contact LSCI or
a factory representative for a
returned
Goods Authorization (RGA)
number before returning the instru-
ment to our service department.
when returning an instrument for
service, photocopy and complete the
Service Form found at the back of
this manual. The form should in-
clude:
Section
II
1. Instrument Model and Serial #s
2. User's Name, Company, Address,
and Phone Number
3. Malfunction Symptoms
4. Description of system
5. Returned Goods Authorization #
If the original carton is avail-
able, repack the instrument in a
plastic bag, place it in the 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
is not
available, pack the instrument
sim-
ilar to the above procedure, being
careful to use spacers or suitable
packing material on all sides of
the instrument.
2-5

This Page Intentionally Left Blank

Model 805
Section III
SECTION III
3.1 INTRODUCTION
This section contains information
and instructions concerning the
operation of the Model
805 Tempera-
ture 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 input modules.
These modules are summarized in
Section
I. Input modules can be
mixed, allowing
two different sen-
sor types to be used with the
805,
e.g., both a diode and a resistance
thermometer could
be used on the
two inputs, with the addition of
one optional input module.
3.3 PRECISION OPTIONS
There are two types of Precision
Options available for the
805. The
8001 Precision Option is supplied
for calibrated sensor(s) precision
option data ordered at the same
time as the
805.
The 8002 Precision Option is used
when the customer already
owns an
805 and wants new sensor calibra-
tion data stored in the instrument.
LSCI stores the calibration data in
an
IC chip and sends the programmed
chip to the customer. The IC is
then installed in the
805 by the
customer. Note: When ordering the
8002 Precision Option, specify the
serial number of the
805.
Note that additional calibrations
can
be added to the instrument at a
later time by specifying with the
sensor calibration at time of
order, the serial number of the
OPERATING INSTRUCTIONS
instrument the sensor will be used
with.
If a Precision Option is ordered
from the factory, its curve number
will be specified for the user and
included in the manual as an adden-
da to the manual (see Section
3.13.2 and Table 3-3).
Note: A proprietary algorithm is
used to fit the precision option
data to within a few millikelvin
over the entire temperature range.
3.4 CONTROL FUNDAMENTALS
An application note entitled "Fun-
damentals for Usage of Cryogenic
Temperature Controllers" is in-
cluded as an appendix in this man-
ual and should be read in detail if
you are not familiar with cryogenic
temperature controllers.
3.5 CONTROLSANDINDICATORS
Figures 3-1 and 3-2 identify the
805 displays, annunciators, con-
trols, and connectors. The iden-
tification of each item is keyed in
the appropriate figure.
FRONT PANEL DESCRIPTION
3.6
POWER ON/OFF Switch
Before connecting AC power to the
805, make sure the rear panel volt-
age selector is set to correspond
to the available power line volt-
age.
Be certain the correct fuse
is installed in the instrument
(Section
2.3.1) .
3.6.1 POWERUP SEQUENCE
Immediately on POWER ON the 805
runs through a power up sequence as
follows
:
3-1

-ion III
1. The Display indicates ±8.8.8.8
and the Heater % indicates 188.
In addition all annunciators and
LED's are turned on. The LED's
include:
SENSOR A and B,
CONTROL SENSOR A and B as well
as four sets of units;
HEATER
POWER (LO, MED, HI); + and -; 2
decimal points for set point, an
ohms indicator; and with an
optional computer interface, the
LOCAL/REMOTE indicators.
2. Next, the unit displays 805 in
the display window and, if pre-
sent, indicates the IEEE-488
interface address in the
HEATER
% window. This address can be
changed by the user and verifi-
cation is always given on
power-up. Note that any changes
in the IEEE-488 address are only
recognized and read
by the in-
strument on power-up.
3. The unit then displays for INPUT
A the module associated with
that input in the display window
as well as the
SENSOR A ID curve
number in the
HEATER % window.
4. The unit then displays the same
5. The unit then goes into normal
information for Input
B.
operation.
3.7 DISPLAY SENSOR Block
3.7.1 DISPLAY SENSOR Input
The choice of Display
SENSOR 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 Units Select
The UNITS key is used to change the
display and control units. The key
is located below the lower right
corner of the display window.
Pressing the key scrolls the units,
3-2
Model 805
i.e., K °F V °C K etc. The se-
lected units are displayed to the
right of the
HEATER % power dis-
play. The units display light is
blinking to indicate the frequency
of display update. If a resistance
module is present, the
ohms in-
dicator comes on in place of
V.
The temperature units for both
inputs are selected by the units
button and are kept the same to
avoid confusion.
3.7.3 Display SENSOR Units
3.7.3.1 voltage Units
In the voltage mode, the display
has a resolution of
1 millivolt and
a full scale input of
3.000 volts
(6.553 volts for the
-6 module).
If
an input exceeding 3.000V (or
6.553V for the
-6 module) is ap-
plied to
the displayed input, an
overload condition is present and
is indicated by an
OL on the dis-
3.7.3.2 Resistance Units
The Resistance mode requires the
805-P2, -P3, or
-R1 input conver-
sion module(s)
.
The display ranges and resolutions
for the 805-P2, -P3 and
-R1 are 0.0
to 299.9 ohms, 0 to 2999 and 0.00
to 99.99 ohms respectively. If a
resistance exceeding full scale is
applied to the input,
OL is indi-
cated on the display.
3.7.3.3 Temperature Units
In kelvin temperature units, the
chosen input is displayed with a
display resolution of
0.1 degree
above
100 kelvin and 0.01 degree
between
1 and 100 kelvin. Note
that this is display resolution and
not system resolution
or accuracy
of the reading. If the sensitivity
of the sensor is too low to support
this resolution, i.e., one bit
play