Omega Products CYD201 Installation Manual

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M789-038A 15 June 1999

OMEGA Model CYD201/CYD208 User’s Manual

WARRANTY

OMEGA warrants this unit to be free of defects in materials and workmanship and to give
satisfactory service for a period of 13 months from date of purchase. OMEGA Warranty adds an
additional one (1) month grace period to the normal one (1) year product warranty to cover handling
and shipping time. This ensures that our Customers receive maximum coverage on each product. If
the unit should malfunction, it must be returned to the factory for evaluation. Our Customer Service
Department will issue an Authorized Return (AR) Number immediately upon phone or written
request. Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or
replaced at no charge. However, this WARRANTY is VOID if the unit shows evidence of having
been tampered with or shows evidence of being damaged as a result of excessive current, heat,
moisture, vibration, or misuse. Components which wear or which are damaged by misuse are not
warranted. These include contact points, fuses, and triacs.

THERE ARE NOT WARRANTIES EXCEPT AS STATED HEREIN. THERE ARE NO OTHER
WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND OF F ITNESS FOR A PARTICULAR PURPOSE. IN
NO EVENT SHALL OMEGA ENGINEERING, INC. BE LIABLE FOR CONSEQUENTIAL,
INCIDENTAL, OR SPECIAL DAMAGES. THE BUYER'S SOLE REMEDY FOR ANY BREACH OF
THIS AGREEMENT BY OMEGA ENGINEERING, INC. , OR ANY BREACH OF ANY WARRANTY
BY OMEGA ENGINEERING, INC., SHALL NOT EX CEED THE PURCHASE PRICE PAID BY THE
PURCHASE TO OMEGA ENGINEERING, INC. FOR THE UNIT OR UNITS OR EQUIPMENT
DIRECTLY AFFECTED BY SUCH BREACH.

RETURN REQUESTS / INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department.
Call toll free in the USA and Canada: 1-800-622-2378; FAX: [phone].

International:

BEFORE RETURNING ANY PRODUCT(S) TO OMEGA,

(AR) NUMBER FROM OUR CUSTOMER SERVICE DEPARTMENT IN ORDER TO AVOID
PROCESSING DELAYS

return package and on any correspondence.

FOR WARRANTY RETURNS:

OMEGA:

1. P.O. Number under which the product was PURCHASED.

2. Model and serial number of the product under warranty.

3. Repair instruction and/or specific problems you are having with the product.

FOR NON-WARRANTY REPA IRS OR CALIB4RATIONS:

repair/calibration charges. Have the following information BEFORE contacting OMEGA:

1. Your P.O. Number to cover COST of the repair/calibration..

2. Model and serial number of the product under warranty.

3. Repair instruction and/or specific problems you are having with the product.
Every precaution for accuracy has been taken in the preparation of this manual, however, OMEGA

ENGINEERING, INC. neither assumes responsibility for any omissions or errors that may appear
nor assumes liability for any damages that result from the use of the products in accordance with
the information contained in the manual.

OMEGA policy is to make running changes, not model changes, whenever an improvement is
possible. That way, our Customers get the latest in technology and engineering.

OMEGA is a registered trademark of OMEGA ENGINEERING, INC.

203-359-1660; FAX; 203-359-7806.

OBTAIN AN AUTHORIZED RETURN

. The assigned AR number should then be marked on the outside of the

Please have the following information available BEFORE contacting

Consult OMEGA for current

© 1998 and 1999 OMEGA ENGINEERING, INC. All rights reserved including illustrations. Nothing
in this manual may be reproduced in any manner, either wholly or in part for any purpose
whatsoever without written permission from OMEGA ENGINEERING, INC. Printed in U.S.A.

A

OMEGA Model CYD201/CYD208 User’s Manual

TABLE OF CONTENTS

Chapter/Paragraph Title Page

1 INTRODUCTION..........................................................................1-1

1.0 General.......................................................................1-1

1.1 Model CYD201/CYD208 System Description.............1-1

1.2 Handling Liquid Helium and Liquid Nitrogen..............1-3

1.2.1 Handling Cryogenic Storage Dewars......................1-3

1.2.2 LHe and LN

1.2.3 Recommended First Aid .........................................1-4

1.3 Electrostatic Discharge...............................................1-4

1.3.1 Identifying ESDS Components ...............................1-5

1.3.2 Handling ESDS Components..................................1-5

1.4 Safety Summary.........................................................1-5

1.5 Safety Symbols...........................................................1-6

2 INSTALLATION...........................................................................2-1

2.0 General.......................................................................2-1

2.1 Inspection and Unpacking..........................................2-1

2.2 Repackaging For Shipment........................................2-1

2.3 Power and Ground Requirements..............................2-2

2.4 Sensor Installation Recommendations.......................2-2

2.4.1 Two-Lead Vs. Four-Lead Measurements................2-3

2.4.2 Connecting Leads to the Sensor.............................2-4

2.4.3 Sensor Mounting.....................................................2-4

2.4.4 Measurement Errors Due to AC Noise....................2-5

2.5 Sensor Input Connections..........................................2-6

2.6 Sensor Curve Definition..............................................2-7

2.7 Rack Mounting............................................................2-7

2.8 Initial Power Up Sequence.........................................2-9

2.9 Power Up Errors.........................................................2-9

Safety Precautions............................1-3

2

3 OPERATION................................................................................3-1

3.0 General.......................................................................3-1

3.1 Units Key....................................................................3-1

3.2 Channel Key (Model CYD208 Only)...........................3-2

3.3 Scan Mode .................................................................3-2

3.4 Setting Dwell Times....................................................3-2

3.5 Alarm Operation .........................................................3-2

3.5.1 Alarm Setpoint ........................................................3-2

3.5.2 Latched and Unlatched Alarms...............................3-3

3.5.3 Alarm Fix Function (Model CYD208 Only)..............3-3

3.6 SoftCal™ Compensations..........................................3-3

3.6.1 SoftCal™ Calibration Procedure.............................3-4

3.6.2 Verifying SoftCal™ Operation.................................3-5

3.6.3 Erasing SoftCal™ Compensations .........................3-5

Table of Contents i

OMEGA Model CYD201/CYD208 User’s Manual

TABLE OF CONTENTS (Continued)

Chapter/Paragraph Title Page

4 REMOTE OPERATION................................................................4-1

4.0 General.......................................................................4-1

4.1 Serial Interface ...........................................................4-1

4.1.1 Serial Interface Connections...................................4-1

4.1.2 Serial Interface Operation.......................................4-3

4.1.3 Sample Basic Program ...........................................4-3

4.1.4 Sample QuickBasic 4.0 Program............................4-4

4.2 Serial Interface Command Summary..........................4-4

5 SERVICE......................................................................................5-1

5.0 General.......................................................................5-1

5.1 Model CYD201 Rear Panel Connections ...................5-1

5.2 Model CYD208 Rear Panel Connections ...................5-2

5.3 Error Code Troubleshooting .......................................5-3

5.4 General Maintenance.................................................5-3

5.5 Fuse Replacement .....................................................5-4

5.6 Line Voltage Configuration.........................................5-4

5.7 Recalibration...............................................................5-5

5.7.1 Current Source Calibration......................................5-5

5.7.2 A/D Converter Calibration.......................................5-6

5.8 Serial Interface Cable and Adapters...........................5-6

6 OPTIONS AND ACCESSORIES..................................................6-1

6.0 General.......................................................................6-1

6.1 Accessories................................................................6-1

6.2 Wires ..........................................................................6-2

6.3 Sensors ......................................................................6-3

APPENDIX A – CURVE TABLES...................................................... A-1

A1.0 General......................................................................A-1

ii Table of Contents

OMEGA Model CYD201/CYD208 User’s Manual

LIST OF ILLUSTRATIONS

Figure No. Title Page

1-1 Typical Cryogenic Dewar..........................................................1-3

2-1 Model CYD201 Sensor Connector J1 Details...........................2-6

2-2 Model CYD208 Sensor Connector J1 Details...........................2-6

2-3 Model 2090 Rack Mounting......................................................2-8

3-1 Model CYD201 Front Panel......................................................3-1

3-2 Model CYD208 Front Panel......................................................3-1

4-1 Serial I/O (RJ-11) Connector Pin Definitions............................4-2

4-2 Serial Interface Connections.....................................................4-2

5-1 Model CYD201 Rear Panel Connections..................................5-1

5-2 Model CYD208 Rear Panel Connections..................................5-2

5-3 Line Voltage Jumper Configuration ..........................................5-4

5-4 Calibration Connections............................................................5-5

5-5 Model CYD200-J10 RJ-11 Cable Assembly Wiring Details......5-6

5-6 Model CYD200-D RJ-11 to DB-25 Adapter Wiring Details.......5-6

5-7 Model CYD200-B RJ-11 to DE-9 Adapter Wiring Details .........5-3

6-1 Serial Interface Adapters..........................................................6-3

LIST OF TABLES

Table No. Title Page

1-1 Model CYD201/CYD208 Specifications....................................1-2

2-1 Line Voltage and Fuse Rating Selection...................................2-2

2-2 Model CYD201/CYD208 Temperature Curves.........................2-7

4-1 Serial Interface Specifications ..................................................4-1

A-1 Curve 0 - DT-500DI-8B Voltage-Temp. Characteristics........... A-1

A-2 Curve 1 - DT-500DI-8A Voltage-Temp. Characteristics........... A-2

A-3 Curve 2 - DT-500DRC-D Voltage-Temp. Characteristics ........ A-3

A-4 Curve 3 - DT-500DRC-E1 Voltage-Temp. Characteristics.......A-4

A-5 Curve 4 - CTI Diode Voltage-Temp. Characteristics................ A-5

A-6 Curve 5 - DT-500DI-8C Voltage-Temp. Characteristics .......... A-6

A-7 Curve 6 - CY-7 Voltage-Temp. Characteristics........................A-7

Table of Contents iii

OMEGA Model CYD201/CYD208 User’s Manual

This Page Intentionally Left Blank

iv Table of Contents

OMEGA Model CYD201/CYD208 User’s Manual

CHAPTER 1

INTRODUCTION

1.0 GENERAL

This chapter covers a general description of the Model CYD201/CYD208
(Paragraph 1.1), Handling Liquid Helium and Liquid Nitrogen (Paragraph 1.2),
Electrostatic Discharge (Paragraph 1.3), Safety Summary (Paragraph 1.4),
and Safety Symbols (Paragraph 1.5).

Due to the OMEGA commitment to continuous product improvement,
modifications may occur to the Model CYD201/CYD208 software with time.
Some of these changes result from Customer feedback about operation on
various cryogenic systems. We encourage comments or suggestions
regarding this instrument. Please return the instrument warranty card to
ensure receipt of future software updates.

1.1 MODEL CYD201/CYD208 GENERAL DESCRIPTION

Model CYD201/CYD208 Digital Thermometers are ideal to monitor critical
temperatures in chemical and materials research, superconductivity
measurements, and low temperature physics. The units feature:

• Broad Temperature Range: 1.4 K to 475 K (–272 °C to 202 °C).

• Single Channel (CYD201) and Eight Channel (CYD208) Models.

• For use with CY-7 Series, DT-500 Series, and other Silicon Diode
Sensors.

• System Accuracy (Instrument with Sensor) with SoftCal™ to within
±0.1 °C or better.

• Temperature display in °C, °F, K, or Sensor Voltage.

• High/Low Alarm Setpoint with Interfacing Alarm Contacts.

• Standard RS-232C Output of Temperature, Input of Settings, and
Alarm Status for Remote Operation.

Introduction 1-1

OMEGA Model CYD201/CYD208 User’s Manual

Table 1-1. Model CYD201/CYD208 Specifications

Display:
Resolution:

Four-digit LED display

0.1 for values > 100 or < –100

0.01 for values between -100<T<100

Temperature Range:

1.4 K to 475 K without probe
23 K to 473 K with probe

System Accuracy:

To within ±0.1K from 177 K to 313 K.
To ±0.2 K or better from 30 K to 373 K.
±1.0 K above 373 K.

Sensor Excitation:
Repeatability:
Input Range:
Hi/Lo Alarm Setpoint:
Alarm Relay:

10 µA constant current

<50 mK

0 to 3 volts with a resolution of 0.1 mV

0.1° resolution
Single SPDT relay, rated 28 VDC or Peak AC, 0.25 A
(3 W max.)

Scan/Dwell:

The Model CYD208 automatically scans all eight channels
with selectable dwell times of 0 (skip), 5, 10, 30 and 60
seconds for each channel.

Connections:
Response Curves*:

Four-lead sensor connection (2 current, 2 voltage).

Standard Curve 10, DT-500DI-8A
(also -8B and -8C), DT-500DRC-D,
DT-500DRC-E1, and CTI Curve C.

* SOFTCAL™ qualified only for CY-7 Series diode sensors.

COMPUTER INTERFACE
Type:

RS-232C Serial Three Wire (Refer to Table 4-1).

MECHANICAL
Ambient Temperature Range:

18 to 28 °C (64 to 82 °F),

or 15 to 35 °C (59 to 95 °F) with reduced accuracy.

Power Requirements:
Dimensions:
Weight:

41 x 106 x 164 mm (1.61 x 4.18 x 6.45 inches).

0.5 kilogram (1.1 Pounds)

90-125 or 210-250 VAC, 50/60 Hz, 3 watts.

NOTES

Product Specifications subject to c hange without notice.

1.

System electronic temperature accurac y in a gi ven temperature range is the

2.

sum of the specifications given for input and out put. Sensor calibration errors
are not included.

1-2 Introduction

OMEGA Model CYD201/CYD208 User’s Manual

1.2 HANDLING LIQUID HELIUM AND LIQUID NITROGEN

Helium and Nitrogen are colorless, odorless, and tasteless gases. They
liquefy when properly cooled. Liquid helium (LHe) and liquid nitrogen (LN

)

2

may be used in conjunction with the Model CYD201 or CYD208. Although
not explosive, there are certain safety considerations in the handling of LHe
and LN

.

2

1.2.1 Handling Cryogenic Storage Dewars

Operate all cryogenic containers (dewars) in
accordance with manufacturer instructions. Safety
instructions are normally posted on the side of
each dewar. Keep cryogenic dewars in a well­ventilated place, protected from the weather, and
away from heat sources. Figure 1-1 shows a
typical cryogenic dewar.

1.2.2 LHe and LN2 Safety Precautions

Transfer LHe and LN2 and operate storage dewar
controls in accordance with manufacturer/supplier
instructions. During transfer, follow all safety
precautions written on the storage dewar and
recommended by the manufacturer.

WARNING

• Liquid helium is a potential asphyxiant and can cause rapid
suffocation without warning. Store and use in an adequately
ventilated area. DO NOT vent the container in confined spaces. DO
NOT enter confined spaces where gas may be present unless area
is well-ventilated. If inhaled, remove to fresh air. If not breathing,
give artificial respiration. If breathing is difficult, give oxygen. Get
medical attention.

• Liquid helium can cause severe frostbite to exposed body parts. DO
NOT touch frosted pipes or valves. For frostbite, consult a
physician immediately. If a physician is unavailable, warm the
affected parts with water that is near body temperature.

Two essential safety aspects of handling LHe are adequate ventilation and
eye and skin protection. Although helium and nitrogen gases are non-toxic,
they are dangerous because they replace air in a normal breathing
atmosphere. Liquid helium is an even greater threat because a small
amount of liquid evaporates to create a large amount of gas. Store and
operate cryogenic dewars in open, well-ventilated areas.

Figure 1-1. Typical

NON-

MAGNETIC

NON-

LIQUID

FLAMMABLE

HELIUM

KEEP

UPRIGHT

Cryogenic Dewar

Introduction 1-3

OMEGA Model CYD201/CYD208 User’s Manual

When transferring LHe and LN2, protect eyes and skin from accidental
contact with liquid or the cold gas issuing from it. Protect eyes with full face
shield or chemical splash goggles; safety glasses (even with side shields)
are inadequate. Always wear special cryogenic gloves (Tempshield
Cryo-Gloves

®

or equivalent) when handling anything that is, or may have
been, in contact with the liquid or cold gas, or with cold pipes or equipment.
Wear long sleeve shirts and cuffless trousers long enough to prevent liquid
from entering shoes.

1.2.3 Recommended First Aid

Post an appropriate Material Safety Data Sheet (MSDS) obtained from the
manufacturer/distributor at every site that stores and uses LHe and LN
MSDS specifies symptoms of overexposure and first aid.

If a person exhibits symptoms of asphyxia such as headache, drowsiness,
dizziness, excitation, excessive salivation, vomiting, or unconsciousness,
remove to fresh air. If breathing is difficult, give oxygen. If breathing stops,
give artificial respiration. Call a physician immediately.

If exposure to cryogenic liquids or cold gases occurs, restore tissue to
normal body temperature (98.6°F) by bathing it in warm water not exceeding
105 °F (40 °C). DO NOT rub the frozen part, either before or after
rewarming. Protect the injured tissue from further damage and infection and
call a physician immediately. Flush exposed eyes thoroughly with warm
water for at least 15 minutes. In case of massive exposure, remove clothing
while showering with warm water. The patient should not drink alcohol or
smoke. Keep warm and rest. Call a physician immediately.

. The

2

1.3 ELECTROSTATIC DISCHARGE

Electrostatic Discharge (ESD) may damage electronic parts, assemblies,
and equipment. ESD is a transfer of electrostatic charge between bodies at
different electrostatic potentials caused by direct contact or induced by an
electrostatic field. The low-energy source that most commonly destroys
Electrostatic Discharge Sensitive (ESDS) devices is the human body, which
generates and retains static electricity. Simply walking across a carpet in
low humidity may generate up to 35,000 volts of static electricity.

Current technology trends toward greater complexity, increased packaging
density, and thinner dielectrics between active elements, which results in
electronic devices with even more ESD sensitivity. Some electronic parts
are more ESDS than others. ESD levels of only a few hundred volts may
damage electronic components such as semiconductors, thick and thin film
resistors, and piezoelectric crystals during testing, handling, repair, or
assembly. Discharge voltages below 4000 volts cannot be seen, felt, or
heard.

1-4 Introduction

OMEGA Model CYD201/CYD208 User’s Manual

1.3.1 Identifying ESDS Components

Below are some industry symbols used to label components as ESDS:

1.3.2 Handling ESDS Components

Observe all precautions necessary to prevent damage to ESDS components
before installation. Bring the device and everything that contacts it to ground
potential by providing a conductive surface and discharge paths. At a
minimum, observe these precautions:

1.

De-energize or disconnect all power and signal sources and loads used
with unit.

2.

Place unit on a grounded conductive work surface.

3.

Ground technician through a conductive wrist strap (or other device)
using 1 M series resistor to protect operator.

4.

Ground any tools, such as soldering equipment, that will contact unit.
Contact with operator's hands provides a sufficient ground for tools that
are otherwise electrically isolated.

5.

Place ESDS devices and assemblies removed from a unit on a
conductive work surface or in a conductive container. An operator
inserting or removing a device or assembly from a container must
maintain contact with a conductive portion of the container. Use only
plastic bags approved for storage of ESD material.

6.

Do not handle ESDS devices unnecessarily or remove from the
packages until actually used or tested.

1.4 SAFETY SUMMARY

Observe these general safety precautions during all phases of instrument
operation, service, and repair. Failure to comply with these precautions or
with specific warnings elsewhere in this manual violates safety standards of
design, manufacture, and intended instrument use. OMEGA assumes no
liability for Customer failure to comply with these requirements.

Ground The Instrument

To minimize shock hazard, connect instrument chassis and cabinet to an
electrical ground. The instrument comes with a 3-conductor AC power
cable. Plug it into an approved three-contact electrical outlet or use a three­contact adapter with the green ground wire firmly secured to an electrical
ground (safety ground) at the power outlet. The power cable jack and
mating plug meet Underwriters Laboratories (UL) and International
Electrotechnical Commission (IEC) safety standards.

Introduction 1-5

OMEGA Model CYD201/CYD208 User’s Manual

t
Y

Do Not Operate In An Explosive Atmosphere

Do not operate the instrument in the presence of flammable gases or fumes.
Operation of any electrical instrument in such an environment constitutes a
definite safety hazard.

Keep Away From Live Circuits

Operating personnel must not remove instrument covers. Refer component
replacement and internal adjustments to qualified maintenance personnel.
Do not replace components with power cable connected. To avoid injuries,
always disconnect power and discharge circuits before touching them.

Do Not Substitute Parts Or Modify Instrument

Do not install substitute parts or perform any unauthorized modification to
the instrument. Return the instrument to an authorized OMEGA Cryotronics,
Inc. representative for service and repair to ensure that safety features are
maintained.

1.5 SAFETY SYMBOLS

Direct current (power line).
Alternating current (power line).
Alternating or direct current (power line).
Three-phase alternating current (power line).

Earth (ground) terminal.

Protective conductor terminal.
Frame or chassis terminal.

On (supply)
Off (supply)

Equipment protected throughout by double insulation or
reinforced insulation (equivalent to Class II of IEC 536 - see
annex H).

Caution: High voltages or temperatures. Background color:
Yellow; Symbol and outline: Black.

Caution or Warning - See instrument documentation.
Background color: Yellow; Symbol and outline: Black.

1-6 Introduction

OMEGA Model CYD201/CYD208 User’s Manual

CHAPTER 2

INSTALLATION

2.0 GENERAL

This chapter covers Inspection and Unpacking (Paragraph 2.1),
Repackaging for Shipment (Paragraph 2.2), Sensor Installation
Recommendations (Paragraph 2.3) Power and Ground Requirements
(Paragraph 2.4), Sensor Curve Definitions (Paragraph 2.5), and Rack
Mounting (Paragraph 2.6).

2.1 INSPECTION AND UNPACKING

Remove packing list and verify receipt of all equipment. For question
about the shipment, please call OMEGA Customer Service Department at
1-800-622-2378 or [phone].

Upon receipt, inspect container and equipment for damage. Note
particularly any evidence of freight damage. Immediately report any damage
to the shipping agent

NOTE:

saved for their examination. After examining and removing contents, save
packing material and carton in the event reshipment is necessary.

2.2 REPACKAGING FOR SHIPMENT

To return the Model CYD201/CYD208, sensor, or accessories for repair or
replacement, obtain a Authorized Return (AR) number from Technical
Service in the United States, or from the authorized sales/service
representative from which the product was purchased. Instruments may not
be accepted without a RGA number. When returning an instrument for
service, OMEGA must have the following information before attempting any
repair.

1. Instrument model and serial number.

2. User name, company, address, and phone number.

3. Malfunction symptoms.

4. Description of system.

5. Authorized Return (AR) number.
Repack the system in its original container (if available). Write AR number

on the outside of the container or on the packing slip. If not available,
consult OMEGA for shipping and packing instructions.

The carrier will not honor any claims unless all shipping material is

Installation 2-1

OMEGA Model CYD201/CYD208 User’s Manual

2.3 POWER AND GROUND REQUIREMENTS

The Model CYD201/CYD208 requires a power source of 90 to 125 or 210 to
250 VAC, 50 or 60 Hz, single phase, 3 Watts. Three-prong detachable
power cord for 120 VAC operation included. Connect to rear panel
UL/IEC/ICEE standard plug. See Table 2-1 for fuse rating.

WARNING: To prevent electrical fire or shock hazards, do not expose
this instrument to rain or excess moisture.

CAUTION: Verify proper fuse installation and AC Line Voltage Selection
Wheel on the Model CYD201/CYD208 rear panel set to available AC line
voltage before inserting power cord and turning on the instrument.
Refer to Chapter 5 to change voltage configuration.

NOTE:

Do not attach the shield to earth ground at the sensor end. It may

introduce noise at the measurement end.

Table 2-1. Line Voltage and Fuse Rating Selection

Select Range Fuse

115
230

To protect operating personnel, the National Electrical Manufacturer’s
Association (NEMA) recommends, and some local codes require, grounded
instrument panels and cabinets. The 3-conductor power cable, when
plugged into an appropriate receptacle, grounds the instrument.

Grounding and shielding signal lines are major concerns when setting up
any precision instrument or system. The CYD201/CYD208 includes ground
isolation of sensor excitation to allow 4-wire measurement of diode voltage
and resistance. Improperly grounding sensor leads and shields can defeat
this feature.

Model CYD201/CYD208 digital logic ties directly to earth ground for
interface communication. The low side of the heater output connects directly
to earth ground. Shield sensor cables whenever possible. Attach the shields
to the connector shield pin.

90 – 125 VAC

210 – 250 VAC

0.2 A (Slow Blow)

0.1 A (Slow Blow)

2.4 SENSOR INSTALLATION RECOMMENDATIONS

See the OMEGA Product Catalog for sensor installation and specifications.
Call OMEGA for copies of application notes or sensor installation questions.
Below are general recommendations on sensor installation:

1. Do not ground the sensor.

2. Shield leads and connect shield wire to SHIELD on screw terminal

connector only. Do not connect shield at other end of cable.

2-2 Installation

OMEGA Model CYD201/CYD208 User’s Manual

3. Keep leads as short as possible.

4. Use twisted-pair wire. Use Duo-Twist™ wire (or equivalent) for two-wire,
or Quad-Twist™ wire (or equivalent) for four-wire applications.

5. Thermally anchor lead wires.

2.4.1 Two-Lead Vs Four-Lead Measurements

In two-lead measurement, the leads that measure sensor voltage also carry
the current. The voltage measured at the instrument is the sum of the
temperature sensor voltage and the IR voltage drop within the two current
leads. Since heat flow down the leads can be critical in a cryogenic
environment, wire of small diameter and significant resistance per foot is
preferred to minimize this heat flow. Consequently, a voltage drop within the
leads may exist.

Four-lead measurement confines current to one pair of leads and measures
sensor voltage with the other lead pair carrying no current.

2.4.1.1 Two-Lead Measurement

Sometimes system constraints dictate
two-lead measurement. Connect the
positive terminals (V+ and I+) together
and the negative terminals (V– and I–)
together at the instrument, then run

Two-Lead

Measurements

two leads to the sensor.
Expect some loss in accuracy; the

voltage measured at the voltmeter equals the sum of the sensor voltage and
the voltage drop across the connecting leads. The exact measurement error
depends on sensor sensitivity and variations resulting from changing
temperature. For example, a 10  lead resistance results in a 0.1 mV
voltage error. The resultant temperature error at liquid helium temperature is
only 3 mK, but, because of the lower sensitivity (dV/dT) of the diode at
higher temperatures, it becomes 10 mK at liquid nitrogen temperature.

I+
V+

V–
I–

2.4.1.2 Four-Lead Measurement

All sensors, both two-lead and four-lead devices,
can be measured in a four-lead configuration to
eliminate the effects of lead resistance. The exact
point at which the connecting leads solder to the

Four-Lead

Diode

two-lead sensor normally results in a negligible
temperature uncertainty.

Installation 2-3

I+

V+

V–

I–

OMEGA Model CYD201/CYD208 User’s Manual

2.4.2 Connecting Leads To The Sensor

Excessive heat flow through connecting leads to any temperature sensor
may differ the temperature between the active sensing element and the
sample to which the sensor mounts. This reflects as a real temperature
offset between what is measured and the true sample temperature.
Eliminate such temperature errors with proper selection and installation of
connecting leads.

To minimize heat flow through the leads, select leads of small diameter and
low thermal conductivity. Phosphor-bronze or Manganin wire is commonly
used in sizes 32 or 36 AWG. These wires have a fairly low thermal
conductivity, yet electrical resistance is not large enough to create
measurement problems.

Thermally anchor lead wires at several temperatures between room
temperature and cryogenic temperatures to guarantee no heat conduction
through the leads to the sensor.

2.4.3 Sensor Mounting

Before installing a diode sensor, identify
which lead is the anode and which is the
cathode. When viewed with the base down
and the leads towards the observer, the
anode is on the right and the cathode is on
the left. The OMEGA CY-7-SD silicon diode
sensor lead configuration is shown to the
right. For other sensors, read accompanying
literature or consult the manufacturer to

Cathode

positively identify sensor leads. Lead identification should remain clear even
after sensor installation. Record the sensor serial number and location.

On the CY-7-SD, the base is the largest flat surface. It is sapphire with gold
metalization over a nickel buffer layer. The base is electrically isolated from
the sensing element and leads; make all thermal contact to the sensor
through the base. A thin braze joint around the sides of the SD package
electrically connect to the sensing element. Avoid contact to the sides with
any electrically conductive material.

When installing the sensor, make sure there are no electrical shorts or
current leakage paths between the leads or between the leads and ground.
If IMI-7031 varnish or epoxy is used, it may soften varnish-type lead
insulations so that high resistance shunts appear between wires if

time for curing is not allowed

Slide Teflon

®

spaghetti tubing over bare leads when the possibility of

.

shorting exists. Avoid putting stress on the device leads and allow for
thermal contractions that occur during cooling which could fracture a solder
joint or lead if installed under tension at room temperature.

DT-470-SD

Diode Sensor Leads

Anode

sufficient

2-4 Installation

OMEGA Model CYD201/CYD208 User’s Manual

For temporary mounting in cold temperature applications, apply a thin layer
of Apiezon

®

N Grease between the sensor and sample to enhance thermal
contact under slight pressure. The preferred method for mounting the
CY-7-SD sensor is the OMEGA CO Adapter.

CAUTION: OMEGA will not warranty replace any device damaged by
user-designed clamps or solder mounting.

®

For semi-permanent mountings, use Stycast epoxy instead of Apiezon
Grease.

NOTE:

Do not apply Stycast epoxy over the CY-7-SD package:

N

sensor stress may shift the readings. In all cases, periodically inspect the
sensor mounting to verify good thermal contact to the mounting surface is
maintained.

2.4.4 Measurement Errors Due To AC Noise

Poorly shielded leads or improperly grounded measurement systems can
introduce AC noise into the sensor leads. In diode sensors, the AC noise
shifts the DC voltage measurement due to the diode non-linear
current/voltage characteristics. When this occurs, measured DC voltage is
too low and the corresponding temperature reading is high. The
measurement error can approach several tenths of a kelvin.
this problem exists, perform either procedure below.

1. Place a capacitor across the diode to shunt induced AC currents.

Capacitor size depends on the noise frequency. If noise is related to
power line frequency, use a 10 µF capacitor. If AC-coupled digital noise
is suspected (digital circuits or interfaces), use a 0.1 to 1 µF capacitor. In
either case, if measured DC voltage increases, there is induced noise in
the measurement system.

2. Measure AC voltage across the diode with an AC voltmeter or

oscilloscope. Most voltmeters do not have the frequency response to
measure noise associated with digital circuits or interfaces (which
operate in the MHz range). For a thorough discussion of this potential
problem, and the magnitude of error which may result, request the paper
“Measurement System-Induced Errors In Diode Thermometry,” J.K.
Krause and B.C. Dodrill, Rev. Sci. Instr. 57 (4), 661, April, 1986.

To greatly reduce potential AC noise, connect twisted leads (pairs) between
the measurement instruments and the diode sensors. Use 32 or 36 AWG
OMEGA Duo-Twist™ Cryogenic Wire, which features phosphor bronze wire
twisted at 3.15 twists per centimeter (8 twists per inch). See the OMEGA
Product Catalog or contact OMEGA for further information.

To determine if

Installation 2-5

OMEGA Model CYD201/CYD208 User’s Manual

2.5 SENSOR INPUT CONNECTIONS

The Model CYD201 has one rear panel 4-pin sensor input connector
designated J1 INPUT 1. The connector pins, numbered 1 thru 4, are shown
below.

J1 INPUT 1

4

3

Figure 2-1. Model CYD201 Sensor Connector J1 Details

The Model CYD208 has a 36-pin “Miniature-D” style connector designated
J1 INPUTS for inputs 1 thru 8. A Model CYD208-D connector is included to
solder interfacing connections to J1. The pin configuration of the Model
CYD208-D is shown below.

Terminal Description

1 +V - Input 1
2 -V - Input 1
3 +V - Input 2
4 -V - Input 2
5 +V - Input 3
6 -V - Input 3
7 +V - Input 4
8 -V - Input 4

9 +V - Input 5
10 -V - Input 5
11 +V - Input 6
12 -V - Input 6
13 +V - Input 7 25 +I - Input 4
14 -V - Input 7 26 -I - Input 4
15 +V - Input 8 27 +I - Input 5
16 -V - Input 8 28 -I - Input 5
17 Shield 29 +I - Input 6
18 Shield 30 -I - Input 6
19 +I - Input 1 31 +I - Input 7
20 -I - Input 1 32 -I - Input 7
21 +I - Input 2 33 +I - Input 8
22 -I - Input 2 34 -I - Input 8
23 +I - Input 3 35 Shield
24 -I - Input 3 36 Shield

Figure 2-2. Model CYD208-D Sensor Connector Details

1

2

Terminal D

4 + Current Out
1 – Current Out
2 – Voltage Sense
3 + Voltage Sense

CASE Shield

123456789101112131415

1920212223242526272829303132333435

Terminal Description

escription

161718

36

2-6 Installation

OMEGA Model CYD201/CYD208 User’s Manual

2.6 SENSOR CURVE DEFINITION

To display accurate temperature, select a response curve that matches the
installed sensor. There are seven standard curves stored within the Model
CYD201/CYD208 numbered 0 through 6 (see Appendix A). Different curves
may be assigned to each channel of the Model CYD208. Find the unit
factory curve configuration inside the front cover of this manual. Curve 6
(CY-7 Curve 10) is the standard curve configuration unless specified
differently upon order.

To determine current curve selection, press and hold
the rear panel SET switch (DIP switch 3). Release
displays the curve number in the display window. The Model CYD208
displays the curve number in the display window and the channel number in
the channel window. To display curves for other channel numbers in the
Model CYD208, press

To change the curve, press
through 6. In the Model CYD208, press
then press

After the new curve selection, turn the SET switch on the rear panel off (0).
The unit returns to normal operation.

UNITS

Table 2-2. Model CYD201/CYD208 Temperature Curves

Curve No. Range (K) Description

CHANNEL

to scroll through the curves.

to scroll through the eight channels.

UNITS

. The instrument scrolls through curves 0

CHANNEL

UNITS

UNITS

to select other channels,

and turn on (1)

key. The CYD201

0
1
2
3
4
5
6

2.7 RACK MOUNTING

The Models CYD201 and CYD208 can install in a standard “size” 1/4 panel
EIA rack space. If you ordered a CYD208-DIN rack mounting adapter, follow
the installation instructions below. See Figure 2-3.

1. Remove front feet on bottom of unit and attach lower rack piece by
threading two of the four screws provided into the front feet holes.

2. Locate the two mounting hole access covers on the top of the unit.
Attach the other rack with the remaining screws.

Installation 2-7

0 – 324.9
0 – 324.9
0 – 324.9
0 – 324.9
0 – 324.9
0 – 324.9
0 – 474.9

DT-500DI-8B
DT-500DI-8A
DT-500DRC-D
DT-500TDC-E1
CTI Curve C
DT-500DI-8C
CY-7 Curve 10

OMEGA Model CYD201/CYD208 User’s Manual

0.265 (6.73)

AB

2.50

(63.5)

1.50
(38.10)

Hole Sizes:

A = 0.189 (0.480) Diameter - 4 Places
B = 0.169 (0.429) Diameter - 2 Places

Model CYD201 or CYD208 Front Panel

0.215 (5.46)

A

1.25

(31.75)

ABA

1.44

(35.58)

Figure 2-3. Model CYD208-DIN Rack Mounting

2-8 Installation

C

L

4.18 (106.17)

1.44

(35.58)

OMEGA Model CYD201/CYD208 User’s Manual

2.8 INITIAL POWER UP SEQUENCE

The test sequence below occurs at power up.

1. All display segments light.

2. The unit displays “-201-” or “-208-”.

3. The instrument begins normal operation. Units currently selected flash.
Model CYD208s also indicate the current channel selected.

2.9 POWER UP ERRORS

On power up, the CYD201/CYD208 checks internal memory. If a problem
exists, an error message displays on the front panel of the instrument.

Er01

“

” indicates a hardware problem in the instrument memory. This error is
not user-correctable. First perform the procedure in Paragraph 5.3. If
unsuccessful, then call the factory.

Er02

“

” indicates a soft error in the instrument memory. To correct this error,
close dip switch 1 on the rear panel for at least 5 seconds, then open it.
Follow the calibration procedure described in Paragraph 5.3 after an error 2
reset.

“OL” indicates a voltage input overload. This can be caused by an open
sensor or diode sensor wired backwards.

Installation 2-9

OMEGA Model CYD201/CYD208 User’s Manual

This Page Intentionally Left Blank

2-10 Installation

OMEGA Model CYD201/CYD208 User’s Manual

CHAPTER 3

OPERATION

3.0 GENERAL

This chapter covers the Units Key (Paragraph 3.1), the Channel key
(Paragraph 3.2), Scan Mode (Paragraph 3.3), Setting Dwell Times
(Paragraph 3.4), Alarm Operation (Paragraph 3.5), SoftCal™
Compensations (Paragraph 3.6), Calibration (Paragraph 3.7), Verifying
SoftCal™ Operation (Paragraph 3.8), and Erasing SoftCal™
Compensations (Paragraph 3.9).

KV°C

UNITS

°F

ON
OFF

Figure 3-1. Model CYD201 Front Panel

KV°C

CYD201 THERMOMETER

UNITS

°F

CHANNEL
ON
OFF

Figure 3-2. Model CYD208 Front Panel

3.1 UNITS KEY

UNITS selects different units of measurement. The thermometer reads in
voltage or temperature (°C, °F, or K). Press
various selections.

UNITS

also determines if SoftCal™ is active. Press and hold

3 seconds. If SoftCal™ is not active, -000- appears in the display.

CYD208 THERMOMETER

UNITS

to scroll through the

UNITS

for

Operation 3-1

OMEGA Model CYD201/CYD208 User’s Manual

3.2 CHANNEL KEY (Model CYD208 Only)
CHANNEL

scrolls through the eight possible sensor channels.

It also
determines if scan mode is activated. Hold 1 to 2 seconds to toggle scan
mode On or Off. A red light glows in the upper left channel display if scan
mode is active.

3.3 SCAN MODE (Model CYD208 Only)

The thermometer can scan 8 channels or monitor 1 channel. To enable
scan mode, press

CHANNEL

for 1 to 2 seconds to toggle scan mode On or
Off. If a light appears in upper left of channel display window, then scan
mode is On. If the light does not appear, the thermometer is in single­channel mode. Repeat action to reverse mode.

3.4 SETTING DWELL TIMES (Model CYD208 Only)

Set the time the thermometer pauses on each channel (dwell) for 5, 10, 30,
or 60 seconds. A dwell time of 0 instructs the thermometer to skip that
particular channel. To set the dwell:

1. Hold

2. While still pressing

CHANNEL

for 3 seconds. Do not release.

CHANNEL

, use

UNITS

to select the desired time;

0 (skip), 5, 10, 30, or 60 seconds.

3. Repeat procedure for each desired channel. Default channel dwell is

5 seconds.

3.5 ALARM OPERATION

This section covers Alarm Setpoint (Paragraph 3.5.1), Latched and
Unlatched Alarms (Paragraph 3.5.2.), and the Alarm Fix Function
(Paragraph 3.5.3).

3.5.1 Alarm Setpoint

The alarm setpoint is a temperature which activates the alarm relay. Set it to
warn of temperatures rising above (high alarm) or falling below (low alarm) a
certain point.

NOTE:

Alarm setpoints work for temperatures, not voltage. If in voltage
mode while setting an alarm setpoint, the thermometer defaults to kelvin for
the alarm setpoint.

To display the alarm setpoint, move the SET switch on the rear panel to
position 1. To change the setpoint:

1. Make sure the SET switch is in position 1.

3-2 Operation

OMEGA Model CYD201/CYD208 User’s Manual

2. Hold

3. Release UNITS when the desired setpoint displays. For a Model

4. Move the SET switch back to position 0 to enable the alarm. When it

The alarm can be connected to another device which triggers when the
alarm activates. The 3-contact terminal block is present on the rear panel as
J3 ALARM. The alarm contacts are designated 1 COM 2 with 1 representing
the normally open state and 2 representing the normally closed state.

UNITS

it is released and pressed again, the temperature direction reverses. If
the temperature display increases, the alarm is a high setpoint. If the
temperature display decreases, the alarm is a low setpoint.

CYD208, press
window and repeat the steps above to set the alarm for each channel

triggers, an alarm status light appears in the upper left of the
temperature display.

until the desired temperature displays.

CHANNEL

to display the desired channel in the channel

UNITS

is a toggle; if

3.5.2 Latched And Unlatched Alarms

Alarms are either latched or unlatched. The alarm is latched when the
LATCH switch is in position 1: the alarm turns On when triggered by the
alarm setpoint, but will
returns to within the high and low setpoint range. The alarm is unlatched
when the LATCH switch is in position 0; the alarm turns On when triggered
by the alarm setpoint, and automatically turns Off when temperatures return
to within the high and low setpoint range.

not

automatically turn Off when the temperature

3.5.3 Alarm Fix Function (Model CYD208 Only)

Set the FIX switch on the Model CYD208 rear panel to OFF (position 0) to
continuously update the alarm relay, depending on the alarm setpoint and
sensor temperature. If the FIX switch is ON (position 1), the relay updates
only when channel 1 input is active.

3.6 SOFTCAL™ COMPENSATIONS

SoftCal™ is a simple, instrument-configured software calibration that
improves system accuracy over a specified temperature range. It reduces
the error between a CY-7 diode and the Standard Curve 10 used by the
instrument. In short, SoftCal™ generates inexpensive calibrations for CY-7
sensors used with OMEGA temperature controllers and monitors.

Operation 3-3

OMEGA Model CYD201/CYD208 User’s Manual

SoftCal™ calibrations are made at three temperature points: liquid helium
(4.2 K), liquid nitrogen (about 77 K), and 305 K. Below is the accuracy* of
the CY-7-SD-13 sensor:

+0.5 K 2 K to <30 K +
+0.25 K 30 K to <60 K +1.0 K 375 K to 475 K
+0.15 K 60 K to <345 K

* These values generally apply to all silicon diode sensors. Only two-point
SoftCal™ calibrations appropriate for CY-7 series Band 11, 11A sensors.

This section covers the SoftCal™ Calibration Procedure (Paragraph 3.6.1),
Verifying SoftCal™ Operation (Paragraph 3.6.2), and Erasing SoftCal™
Compensations (Paragraph 3.6.3).

0.25 K 345 K to <375 K

3.6.1 SoftCal™ Calibration Procedure

1. Turn on thermometer 30 minutes prior to operation.

2. Place the SET switch in position 1.

3. Hold

4. Press

5. Hold

6. Verify sensor stabilization at calibration temperature.

7. Press

8. To enter more than one point, go back to step 5.

9. Return the SET switch to position 0.

UNITS

acts as a toggle. If the display rises, release and press again.

"-SOF-" to indicate the unit is ready to erase the current SoftCal™
calibration. Within 2 seconds press
display changes from "-SOF-" to the current SoftCal™ setting.

setting SoftCal™ for liquid helium, the display reads 4.2 K. If setting for
ice point, the display reads 0 °C.

ready to accept the calibration point. Within 2 seconds, press
enter a new calibration point. (If
the display returns to the alarm temperature). After 15 seconds, the
alarm setpoint temperature displays.

be entered between 1.4 K to 9.9 K. No point may be entered between
10 K and 40 K. Two points may be entered above 40 K.

until 0 kelvin (or equivalent in °C or °F) displays. The key

CAL ENABLE

UNITS

until the sensor temperature displays. For example, if

CAL ENABLE

on rear panel with a pen tip. The display reads

UNITS

again. The temperature

again. "-SOF-" again displays to indicate the unit is

UNITS

is not pressed within 2 seconds,

NOTE:

UNITS

to

One point may

3-4 Operation

OMEGA Model CYD201/CYD208 User’s Manual

3.6.2 Verifying SoftCal™ Operation

Check the status of SoftCal™ by holding
SoftCal™ is not in operation, "-000-" displays.

If the first digit of the display is 1, SoftCal™ is set for below 28 K. If either
the second or third digit is 1, SoftCal™ is set for above 28 K.

UNITS

for 2-3 seconds. If

3.6.3 Erasing SoftCal™ Compensations

When SoftCal™ compensations are erased, the thermometer returns to
normal operation.

1. Move the SET switch to position 1.

2. Hold

3. Press

4. Move the SET switch to position 0.

UNITS

display moves in the wrong direction, release and press again.

from 0 to "-SOF-". The alarm setpoint displays after erasing SoftCal™
compensation.

until the front panel displays 0. This key is a toggle. If the

CAL ENABLE

on rear panel using a pen tip. The display changes

Operation 3-5

OMEGA Model CYD201/CYD208 User’s Manual

This Page Intentionally Left Blank

3-6 Operation

OMEGA Model CYD201/CYD208 User’s Manual

CHAPTER 4

REMOTE OPERATION

4.0 GENERAL

The Model CYD201/CYD208 Digital Thermometer Serial Interface can be
used for both operation and service. This chapter covers the Serial Interface
(Paragraph 4.1) and Serial Interface Commands (Paragraph 4.2).

4.1 SERIAL INTERFACE

The Model CYD201/CYD208 has a serial interface for RS-232C
communications with a host computer. RS-232C is an unbalanced (single
ended), non-terminated line used over short distances (typically 10 feet or
less). The Model CYD201/CYD208 serial interface complies with the
electrical format of the RS-232C Interface Standard. The serial interface
connector is a standard 6 wire RJ-11 modular (telephone) jack.

This section covers Serial Interface Specifications (Table 4-1), Serial
Interface Connections (Paragraph 4.1.1), Serial Interface Hardware
Configuration and Adapters (Figures 4-1 & 4-2), Serial Interface Operation
(Paragraph 4.1.2), and Sample Basic and QuickBasic Programs
(Paragraphs 4.1.3 & 4.1.4 respectively).

Table 4-1. Serial Interface Specifications

Transmission:
Connector:
Timing Format:
Transmission Mode:
Baud Rate:
Bits per Character:
Parity Type:
Data Interface Levels:
Terminator:

Three-Wire
RJ-11 Modular (Telephone) Socket
Asynchronous
Half Duplex
300
1 Start, 7 Data, 1 Parity, 1 Stop
Odd
Transmits/Receives Using EIA Levels
LF (0AH)

4.1.1 Serial Interface Connections

The serial interface connector is a standard 6 wire RJ-11 modular
(telephone) jack. OMEGA Model CYD200-J10 data cables, which maintain
pin 1 polarity, simplify interconnection. OMEGA offers the Model CYD200-D
RJ-11 to DB-25 adapter and Model CYD200-B RJ-11 to DE-9 adapter to
connect to the host computer. See Figure 4-2.

Remote Operation 4-1

OMEGA Model CYD201/CYD208 User’s Manual

J2 SERIAL I/O

PIN DESCRIPTION

1

654321

RS-232C In (RxD)

2

RS-232C In (RxD)

3

RS-232C Ground

4

RS-232C Ground

5

RS-232C Out (TxD)

6

RS-232C Out (TxD)

Figure 4-1. Serial I/O (RJ-11) Connector Pin Definitions

Model CYD200-B RJ-11

to DB-2 5 Adapt er

RS-232C
Interface Output
on rear of Model

CYD201 or

CYD208

To Customer Supplied Computer

DB-25 Serial Interface Connector

Mode l CYD200-B

RJ-11 to DE-9 Adapter

DB-9 Serial Interface Connector

To Cust ome r Supp lie d Compute r

Use whichever adapter that

matches your computer

serial interface connector

RJ-11 Cable Assembly

J2 SERIAL I/O

Model CYD200-J10

Figure 4-2. Serial Interface Connections

4-2 Remote Operation

OMEGA Model CYD201/CYD208 User’s Manual

4.1.2 Serial Interface Operation

Remotely control all thermometer functions, except SoftCal™
compensations from a computer with communications software and modem.
Located on the rear panel is a RJ-11 modular socket designated J2 SERIAL
I/O for host computer connection. Accessories CYD200-J10 (RS-232C
phone cord) and CYD200-D (RJ-11 to DB-25 adapter), as well as a null
modem adapter may be required to link the serial port of the host computer
directly to the thermometer. When programming a Model CYD201/CYD208
from the serial interface, consider the following:

• Type commands in all CAPS.

• The term
appropriate place in the string of digits.

[term]

•
where they appear on a returning character string from the unit.

• Leading zeros and zeros following a decimal point are not needed in a
command string, but they are sent in response to a query.

• Enter temperature to 0.1 degrees. Greater precision truncates.
Temperature is limited from 0 to 475 K.

• Place no space between commands and the variable being sent.

free field

in examples indicates terminating characters placed by the user or

indicates a floating decimal point placed any

4.1.3 Sample Basic Program

10 OPEN “COM1:300,O,7,1,RS” AS #1 ‘Open COM port
11 PRINT “TYPE ‘QUIT’ TO EXIT” ‘Print QUIT message
12 PRINT ‘Print blank line
20 INPUT “ENTER COMMAND”;A$ ‘Get command to send
21 IF A$ = “QUIT” THEN GOTO 100 ‘Look for QUIT then quit
30 A$ = A$ +CHR$(13)+CHR$(10) ‘Adding CR and LF
40 PRINT #1,A$; ‘Sending command string
45 R = INSTR(A$,”W”) ‘Scan CMD for W/QUERRY
46 IF R = 0 THEN GOTO 90 ‘If not a QUERRY skip PRINT
50 FOR Z = 1 TO 500: NEXT Z ‘Short delay
60 LINE INPUT#1,B$ ‘Read back CYD201/CYD208 response
70 PRINT B$; ‘PRINT instrument response
90 GOTO 11 ‘Jump back to the beginning
100 CLOSE #1 ‘Close COM port
101 END ‘End program

Remote Operation 4-3

OMEGA Model CYD201/CYD208 User’s Manual

4.1.4 Sample Quick Basic 4.0 Program

STARTUP: OPEN “COM1:300,O,7,1,RS” FOR RANDOM AS #1

PRINT “TYPE ‘QUIT’ TO EXIT” ‘print ‘QUIT’ message

RESTART: PRINT ‘print blank line

INPUT “ENTER COMMAND”; A$ ‘get command to send
IF A$ = “QUIT” THEN GOTO FINISH ‘check for quit request
A$ = A$ + CHR$(13) + CHR$(10) ‘adding CR and LF
PRINT #1, A$; ‘sending command string
R = INSTR(A$, “W”) ‘scan for W/query
IF R = 0 THEN GOTO REJUMP ‘if not query skip pri nt
FOR Z = 1 TO 500: NEXT Z ‘short delay
LINE INPUT #1, B$ ‘read back CYD201/CYD208 response

PRINT B$; ‘print instrument response
REJUMP: GOTO RESTART ‘jump back to beginning
FINISH: CLOSE #1 ‘close serial port

END ‘end/exit program

4.2 SERIAL INTERFACE COMMAND SUMMARY

Command Function Command Function

F0 Sensor Units for Setpoint Y Scan Dwell Time *

H High Alarm Setpoint YC Scanner Channel Selection *
L Low Alarm Setpoint YH Scan Disable *

R Reset Alarm YS Scan Enable *
WA Switch ID & Alarm Dat a Query WY Scan and Dwell Query *
WS Sensor Reading & Alarm Status Query

* Model CYD208 Only.

‘open the serial port

Below is an explanation of the command list structure.

Command Name

Syntax of user input.

Information returned in

response to query.

Explanation of

returned data.

Brief Description of Function

Alarm Reset.

R

Nothing
Used to reset

R

Input:
Returned:
Remarks:

the alarm.

4-4 Remote Operation

OMEGA Model CYD201/CYD208 User’s Manual

F0 Sets Sensor Units for Temperature Display.

Input:
Returned:
Remarks:

F0x

Nothing
Sets sensor units for the temperature display, where

x

= C (Celsius), F (Fahrenheit), K (kelvin), or V (volts).

H Select High Alarm Setpoint Value.

Input:
Returned:
Remarks:

Example: H300[term]

Hxxx.x

Nothing
Sets high alarm setpoint, where
in units specified by F0 command. If the instrument is set for
volts, the alarm defaults to kelvin.

sets a high alarm setpoint of 300 degrees.

xxx.x

= temperature setpoint

L Select Low Alarm Setpoint Value.

Input:
Returned:
Remarks:

Example: L31.2[term]

Lxxx.x

Nothing
Sets low alarm setpoint, where
in units specified by F0 command. If the instrument is set for
volts, the alarm defaults to kelvin.

sets a low alarm setpoint of 31.2 degrees.

xxx.x

= temperature setpoint

R Alarm Reset.

Input:
Returned:
Remarks:

R

Nothing
Resets the alarm.

Y Channel Dwell Time

Input:
Returned:
Remarks:

Example: Y23[term]

Remote Operation 4-5

Yab

Nothing
Sets dwell time for a given channel, where a = channel 1 - 8,
and b = the dwell time parameter as follows:

0

= zero seconds, 1 = 5 seconds, 2 = 10 seconds,

3

= 30 seconds, 4 = 60 seconds

Setting a dwell time of 0 skips the specified channel in the
sequence.

sets the dwell time for channel 2 to 30 seconds.

(Model CYD208 Only)

.

OMEGA Model CYD201/CYD208 User’s Manual

YC Channel Scanner Channel

Input:
Returned:
Remarks:

YH End Scanning

Input:
Returned:
Remarks:

YS Begin Scanning

Input:
Returned:
Remarks:

YCx

Nothing
Asynchronously selects a scanner channel for readout
independent of scan feature, where x = channel 1 - 8.

(Model CYD208 Only)

YH

Nothing
Halts input scan at current input channel. Place scanner on
hold when sending any other commands to scanner or
unpredictable results may occur.

(Model CYD208 Only)

YS

Nothing
Starts input scan from current input channel. The instrument
skips every channel with a dwell time of zero.

WA Switch ID and Alarm Data.

Input:
Returned:

Remarks:

WA

For a Model CYD201, returns:

[switch ID],[high or low alarm],[alarm sign],[alarm
setpoint](CR)(LF)

For a Model CYD208, returns:

[switch ID],[high or low alarm],[alarm sign],[alarm
setpoint],[active channel number](CR)(LF)

Provides the switch ID and alarm data. The switch ID
parameter is 0 through 3 for the Model CYD201. It is the sum
of 1 if the alarm set enable is set, plus 2 if relay latching is
desired. The switch ID parameter is 0 through 7 for the Model
CYD208. It is the sum of 1 if the alarm set enable is set, plus
2 if relay latching is desired, plus 4 if the alarm fix is enabled.
High or Low Parameter: H = high alarm, L = low alarm.

(Model CYD208 Only)

.

.

.

4-6 Remote Operation

OMEGA Model CYD201/CYD208 User’s Manual

WS Sample Sensor Reading and Alarm Status.

Input:
Returned:

Remarks:

WS

For a Model CYD201, returns:

[sign],[sensor reading],[units],[alarm status] (CR)(LF)

For a Model CYD208, returns:

[current channel],[sign],[sensor reading],[units], [alarm
status](CR)(LF)

Returns the sample sensor reading and alarm status, where

A

= active and I = inactive.

WY Scan Status

Input:
Returned: [scan status],[current channel number],[channel which

Remarks:

WY

caused the alarm state], [channel 1 dwell time],[channel 2
dwell time],...[channel 8 dwell time](CR)(LF)

Returns instrument scan status (scanning or holding),
channel dwell information, and scan position. Scan Status
Parameter: H = holding, S = scanning. Channel Which
Caused the Alarm State Parameter = 1 through 8 or "-" if
alarm is inactive. Channel dwell times are in seconds.
Sending this command with a Model CYD201 returns N to
signify no scanner.

(Model CYD208 Only)

.

Remote Operation 4-7

OMEGA Model CYD201/CYD208 User’s Manual

This Page Intentionally Left Blank

4-8 Remote Operation

OMEGA Model CYD201/CYD208 User’s Manual

CHAPTER 5

SERVICE

5.0 GENERAL

This chapter covers Model CYD201/CYD208 maintenance: Model CYD201
Rear Panel Connections (Paragraph 5.1), Model CYD208 Rear Panel
Connections (Paragraph 5.2), Error Code Troubleshooting (Paragraph 5.3),
General Maintenance (Paragraph 5.4), Fuse Replacement (Paragraph 5.5),
Line Voltage Selection (Paragraph 5.6), Calibration (Paragraph 5.7), and
Serial Interface Cable and Adapters (Paragraph 5.8).

5.1 MODEL CYD201 REAR PANEL CONNECTIONS

Figure 5-1. Model CYD201 Rear Panel Connections

J1 INPUT 1
J2 SERIAL I/O

computer. May require accessories CYD200-J10 (RJ-11 phone cord) and
CYD200-D (RJ-11 to DB-25 adapter).

J3 ALARM

device. Contact 1 is normally open, contact 2 is normally closed.

Switch





LATCH

indicated by temperature change. When off (position 0), turns alarm off or
on (unlatched).

SET
CAL ENABLE

Calibration. See Paragraph 5.7.2.

I ADJ

Calibration. See Paragraph 5.7.1.

Service 5-1

: Accepts circular 4-pin connector temperature sensor (201-MC).

: RJ-11 jack for serial remote communications to a host

: Relay responds to alarm setpoints and can trigger another

: Not used.

switch: When on (position 1), turns alarm on but not off (latched) as

switch: Used in setting alarm setpoints and recalibration.

(Calibration Enable) pushbutton: Used during A/D Converter

(Current Adjust) trim potentiometer: Used during Current Source

OMEGA Model CYD201/CYD208 User’s Manual

5.2 MODEL CYD208 REAR PANEL CONNECTIONS

Figure 5-2. Model CYD208 Rear Panel Connections

J1 INPUTS

adapters. Adapter sits on top of thermometer and accepts up to 8
temperature sensors. Adapter designed for either circular 4-pin (2084) or
stripped wire (2081) sensors.

J2 SERIAL I/O

computer. May require accessories CYD200-J10 (RS-232C phone cord)
and CYD200-D (RJ-11 to DB-25 adapter).

J3 ALARM

device. Contact 1 is normally open, contact 2 is normally closed.

FIX

switch: Switches alarm functions between monitoring all channels

(position 0) or monitoring channel 1 only (position 1).

LATCH

indicated by temperature change. When off (position 0), turns alarm off or
on (unlatched).

SET
CAL ENABLE

Calibration. See Paragraph 5.7.2.

I ADJ

Calibration. See Paragraph 5.7.1.

: Accepts 36-pin “D” style connector (208-MC) and multi-sensor

: RJ-11 jack for serial remote communications to a host

: Relay responds to alarm setpoints and can trigger another

switch: When on (position 1), turns alarm on but not off (latched) as

switch: Used in setting alarm setpoints and recalibration.

(Calibration Enable) pushbutton: Used during A/D Converter

(Current Adjust) trim potentiometer: Used during Current Source

5-2 Service

OMEGA Model CYD201/CYD208 User’s Manual

5.3 ERROR CODE TROUBLESHOOTING

On power up, the CYD201/CYD208 checks internal memory. If a problem
exists, an error message displays on the front panel of the instrument.

Er01

indicates a hardware problem in the instrument memory. This error is

not user-correctable.

Er02

indicates a soft error in the instrument memory. To correct this error,

use the following procedure.

1. Power up the unit and allow it to display Er02.

2. Close DIP Switch 1 (top of the switch pressed in). Leave the switch
closed for at least 5 seconds, then open DIP switch 1 (bottom of the
switch pressed in).

3. Verify the Model CYD201/CYD208 display goes through a normal power
up sequence and then displays 499.9 K.

4. The input(s) of the Model CYD201/CYD208 must now be recalibrated
per in procedure in Paragraph 5.7 before the unit can be used.

OL

indicates a voltage input overload. This can be caused by an open

sensor or diode sensor wired backwards.
Before calling the factory about a persistent problem, try the procedure

below:

WARNING: This procedure erases calibration constants stored in Non­Volatile RAM. If this procedure is used, recalibrate the instrument.

1. With power turned Off, press and hold
While holding

2. If the Model CYD201/CYD208 displays
procedure in Paragraph 5.7. If
CYD201/CYD208 does not respond, contact OMEGA Service.

CAL ENABLE

, turn instrument power On.

Er01

CAL ENABLE

Er02

still displays or if the Model

, follow the Calibration

on the back panel.

5.4 GENERAL MAINTENANCE

Clean the CYD201/CYD208 periodically to remove dust, grease and other
contaminants. Clean the front and back panels and case with a soft cloth
dampened with a mild detergent and water solution.

NOTE:

Do not use aromatic hydrocarbons or chlorinated solvents to clean
the Model CYD201/CYD208. They may react with the silk screen printing on
the back panel.

Service 5-3

OMEGA Model CYD201/CYD208 User’s Manual

5.5 FUSE REPLACEMENT
WARNING: To prevent shock hazard, turn off instrument and

disconnect it from AC line power and all test equipment before
replacing fuse.

1. Turn POWER switch Off and disconnect power cord from unit.
Disconnect all test equipment from unit.

2. Remove all screws from rear panel. Gently pull away rear panel and
remove enclosure cover by sliding it to the back.

3. Remove fuse with a fuse puller. The fuse is located behind the
transformer as shown in Figure 5.3.

4. Replace with a 0.2 A fuse for 110 V (115 VAC) operation or a 0.1 A fuse
for 220 V (230 VAC) operation. Use slow blow fuses.

CAUTION: Replace fuse with the same type and rating as specified by
the line voltage selected.

5. Replace enclosure cover, rear panel, and all screws.

5.6 Line Voltage Configuration

The rear-panel, 3-pronged line power connector permits Model
CYD201/CYD208 operation at either 110 or 220 VAC. The configuration is
indicated on rear panel in the Line Voltage Selection Block. Use the
procedure below to change line voltage.

WARNING: To prevent shock hazard, turn off instrument and
disconnect it from AC line power and all test equipment before
changing line voltage configuration.

1. Turn power switch OFF and disconnect the power cord from the unit.
Disconnect all test equipment from unit.

2. Remove all screws from rear
panel. Gently pull away rear
panel and remove enclosure
cover by sliding it to the back.

3. Modify jumper configuration to
desired line voltage (see
Figure 5-3).

4. Replace fuse to match new
voltage requirements.

5. Replace enclosure cover, rear
panel and all screws.

Figure 5-3

Jumper Configuration

Line Voltage

5-4 Service

OMEGA Model CYD201/CYD208 User’s Manual

5.7 RECALIBRATION

OMEGA calibrates and certifies thermometers to original factory
specifications for a reasonable fee. You can recalibrate the thermometer to
original specifications, but OMEGA will not warrant these calibrations.

Recalibration requires a digital voltmeter (DVM) with 4½ digit resolution or
better; and 25 k and 125 k precision resistors with ±0.01% tolerance or
better.

Recalibration involves current source and analog/digital (A/D) converter
calibration. A/D calibration erases all SoftCal™ compensations; perform it
after current source calibration, not before.

5.7.1 Current Source Calibration

1. Allow 30 minute warm-up to achieve rated specifications.

2. Configure 125 k resistor as shown in Figure 5-4. Set Model CYD208 to
channel 1.

3. Connect DVM voltage leads across the resistor and adjust the I ADJ
trimpot (located on rear panel) until DVM displays a voltage of 1.2500
volts ±100 microvolts.

4. Remove DVM and resistor.

Model CYD201 Model CYD208

NOTE:

Do not use a voltmeter for A/D Converter Calibration.

Figure 5-4. Calibration Connections

Service 5-5

OMEGA Model CYD201/CYD208 User’s Manual

5.7.2 A/D Converter Calibration

NOTE:

Current source calibration

calibration.

1. Allow 30 minute warm-up to achieve rated specifications.

2. Perform current source calibration.

3. Configure 125 k resistor as shown in Figure 5-4. Set Model 208s to
channel 1.

4. Wait 10 seconds for resistor voltage to settle.

5. Press

CAL ENABLE

, then within 2 seconds press

window shows "-CAL-" for approximately 15 seconds.

6. Repeat procedure with 25 k resistor.

7. For Model CYD208, repeat procedure for other 7 channels. See
Figure 2-2 for pin assignments.

5.8 SERIAL INTERFACE CABLE AND ADAPTERS

1234 56

Figure 5-5. Model CYD200-J10 RJ-11 Cable Assembly Wiring Details

TxD
Gnd
Gnd
RxD

must

be performed

YELLOW

GREEN

RED

BLACK

before

UNITS

A/D converter

. The display

123456

13121110987654321

25 24 23 22 21 20 19 18 17 16 15 14

DB-25 CONNECTOR

= NOT
USED

RxD

654321

Gnd

TxD

RJ-11
RECEPTACLE

Figure 5-6. Model CYD200-D RJ-11 to DB-25 Adapter Wiring Details

5-6 Service

OMEGA Model CYD201/CYD208 User’s Manual

54321

9876

DE-9 CONNECTOR

= NOT
USED

RxD

Gnd

TxD

654321

RJ-11
RECEPTACLE

Figure 5-7. Model CYD200-B RJ-11 to DE-9 Adapter Wiring Details

Service 5-7

OMEGA Model CYD201/CYD208 User’s Manual

This Page Intentionally Left Blank

5-8 Service

OMEGA Model CYD201/CYD208 User’s Manual

CHAPTER 6

OPTIONS AND ACCESSORIES

6.0 GENERAL

This chapter lists options, accessories, sensors, wires, and special
equipment available for the Model CYD201/CYD208.

6.1 ACCESSORIES
MODEL DESCRIPTION OF ACCESSORY

201-MC

208-MC

CYD200-J10

CYD200-D

CYD200-B

2010
2080

2081

2082-1

2082-2

2082-3

2082-4

4-pin Mating Connector for Model CYD201 and Model

2084.
36-pin “D” Style Connector for Model CYD208.
RJ-11 to RJ-11 Phone Cord, 10 feet (3 meters). See

Figure 6-1.
RJ-11 to DB-25 Adapter. Connects RJ-11 to RS-232C

Serial Port on rear of computer. See Figure 6-1.
RJ-11 to DE-9 Adapter. Connects RJ-11 to RS-232C

Serial Port on rear of computer. See Figure 6-1.
Model CYD201 calibration connector.
Model CYD208 calibration connector.
Screw Terminal Adapter. Connects Model CYD208 to

multiple sensor/probe assemblies with stripped ends
and non- permanent wiring. Provision for attachment to
top of thermometer. Fitted with “D” type mating
connector.

Stainless steel Sensor Probe with 6-foot (1.83 m) cable
with 4 stripped ends. 4-inch (10 cm) long by

1

/8 inch

(3.2 mm) diameter probe.
Stainless steel Sensor Probe with 6-foot (1.83 m) cable

with 4-pin 201-MC mating connector. 4-inch (10 cm)
long by

Stainless steel Sensor Probe with 12-foot (3.7 m) cable
with 4 stripped ends. 6-inch (15 cm) long by

1

/8 inch (3.2 mm) diameter probe.

1

/8 inch

(3.2 mm) diameter probe.
Stainless steel Sensor Probe with 12-foot (3.7 m) cable

with 4-pin 201-MC mating connector. 6-inch (15 cm)
long by

1

/8 inch (3.2 mm) diameter probe.

Options and Accessories 6-1

OMEGA Model CYD201/CYD208 User’s Manual

ACCESSORIES

(continued)

MODEL DESCRIPTION OF ACCESSORY

Sensor Probe. 12-foot (3.7 m) cable with CY-7-SD-13
sensor in CY mounting adapter, stripped ends. Tempera-

2083-1

ture limit: 325 K (52 °C). Diode sensor epoxied (Stycast)
into center of 0.564 inch (1.43 cm) diameter by 0.20 inch
(5 mm) thick copper disk. 30 AWG copper leads anchored
to disk. Mass (excluding leads): 4.3 grams.

Sensor Probe. 12-foot (3.7 m) cable with CY-7-SD-13
sensor in CY mounting adapter, with 4-pin CYD201-MC
mating connector. Temperature limit: 325 K (52 °C). Diode

2083-2

sensor epoxied (Stycast) into center of 0.564 inch (1.43
cm) diameter by 0.20 inch (5 mm) thick copper disk. 30
AWG copper leads anchored to disk. Mass (excluding
leads): 4.3 grams.

Multi-Connector Adapter. Required with Model CYD208

2084

when using multiple probe/cable assemblies and Model
201-MC mating connectors.

CYD208

-DIN

Mounting Adapter for Rack Installation. For installation in

¼

a

panel EIA rack space. See Figure 2-3.

6.2 MODEL CYD201/CYD208 WIRES
LSCI P/N DESCRIPTION OF CABLE

9001-005

Quad-Twist™ Cryogenic Wire.

phosphor-bronze wire, 36 AWG, 0.127 mm (0.005 inch)

Two twisted pairs,

diameter.

9001-006

Duo-Twist™ Cryogenic Wire.

phosphor-bronze wire, 36 AWG, 0.127 mm (0.005 inch)

Single twisted pair,

diameter.

9001-007

9001-008

—

Quad-Lead™ Cryogenic Wire

flat, 32 AWG, 0.203 mm (0.008 inch) diameter.

Quad-Lead™ Cryogenic Wire

flat, 32 AWG, 0.127 mm (0.005 inch) diameter.
Any quality dual shield twisted pair wire for dewar to

Model CYD201/CYD208 connector.

. Phosphor-bronze wire,

. Phosphor-bronze wire,

6-2 Options and Accessories

OMEGA Model CYD201/CYD208 User’s Manual

6.3 MODEL CYD201/CYD208 SENSORS
SENSOR NO. DESCRIPTION OF SENSOR

The smallest silicon diode Temperature Sensor

Series DT-420

available. Installs on flat surfaces. Same silicon
chip as Series CY-7 and DT-471.

Silicon Diode Miniature Temperature Sensor. Same

Series DT-450

silicon chip as CY-7 designed to install in recesses
as small as 1.6 mm dia. by 3.2 mm deep.

Silicon Diode Temperature Sensor. Repeatable,

Series CY-7

interchangeable, accurate, wide range, customized
for cryogenics.

An economical version of the CY-7 for applications

Series DT-471

where temperature measurements below 10 K are
not required.

Model CYD200- B RJ-11

to DB-2 5 Adapter

RS-232C

Interface Output

on rear of Model

CYD201 or

CYD208

To Customer Supplied Computer

DB-25 Serial Interface Connector

Model CYD200-B

RJ-11 to DE-9 Adapter

DB-9 Serial Interface Connector

To Customer Supplied Com puter

Use whichever adapter that

matches your computer

serial interface connector

Model CYD200-J10

RJ-11 Cable Assembly

J2 SERIAL I/O

Figure 6-1. Serial Interface Adapters

Options and Accessories 6-3

OMEGA Model CYD201/CYD208 User’s Manual

This Page Intentionally Left Blank

6-4 Options and Accessories

OMEGA Model CYD201/CYD208 User’s Manual

APPENDIX A

CURVE TABLES

A1.0 GENERAL

The following curve tables apply to the Model CYD201/CYD208: Curve 0 ­DT-500DI-8B (Table A-1), Curve 1 - DT-500DI-8A (Table A-2), Curve 2 ­DT-500DRC-D (Table A-3), Curve 3 - DT-500DRC-E1 (Table A-4), Curve 4 ­CTI Curve C (Table A-5), Curve 5 - DT-500DI-8C (Table A-6), and Curve 6 ­CY-7 Curve 10 (Table A-7).

Table A-1. Curve 0: DT-500DI-8B Voltage-Temp. Characteristics

Temp. PROM

BP # (K) Voltage

Temp. PROM

BP # (K) Voltage

Temp. PROM

BP # (K) Voltage

29 4.0 2.41773

4.2 2.40475

4.4 2.39217

4.6 2.37946

4.8 2.36668

5.0 2.35378

5.5 2.32126

6.0 2.28869

6.5 2.25643

7.0 2.22480

7.5 2.19395

28 8.0 2.16053

8.5 2.13552

9.0 2.10809

9.5 2.08197

10.0 2.05687

11.0 2.00852

12.0 1.96003

13.0 1.90579

27 14.0 1.85614

15.0 1.80479

26 16.0 1.74703

17.0 1.67479

18.0 1.60665

19.0 1.53675

20.0 1.46370

21.0 1.38832

25 22.0 1.31868

23.0 1.26476
24 24.0 1.21712
23 25.0 1.17857
22 26.0 1.15106
21 27.0 1.13317
20 28.0 1.12169

19 29.0 1.11353
18 30.0 1.10729
17 32.0 1.09810
16 34.0 1.09125
15 36.0 1.08547

38.0 1.08038

14 40.0 1.07549

45.0 1.06400

13 50.0 1.05273

55.0 1.04123

12 60.0 1.02954

65.0 1.01748

11 70.0 1.00528

75.0 0.99263

77.4 0.98666

80.0 0.97988

10 85.0 0.96711

90.0 0.95397

95.0 0.94086

100.0 0.92767

105.0 0.91443

9 110.0 0.90124

115.0 0.88776

120.0 0.87434

125.0 0.86087

130.0 0.84735

135.0 0.83377

8 140.0 0.82032

145.0 0.80647

150.0 0.79274

155.0 0.77896

160.0 0.76513

165.0 0.75125

170.0 0.73733

7 175.0 0.72353

180.0 0.70936

185.0 0.69532

190.0 0.68125

195.0 0.66713

200.0 0.65302

205.0 0.63889

210.0 0.62475

215.0 0.61066

6 220.0 0.59646

225.0 0.58262

230.0 0.56877

235.0 0.55504

5 240.0 0.54136

245.0 0.52801

250.0 0.51469

4 255.0 0.50155

260.0 0.48815

265.0 0.47486

270.0 0.46148

275.0 0.44800

3 280.0 0.43451

285.0 0.42064

290.0 0.40675

295.0 0.39274

2 300.0 0.37875

305.0 0.36436

310.0 0.35002

315.0 0.33559

320.0 0.32109

325.0 0.30656

1 330.0 0.29222

Appendix A A-1

OMEGA Model CYD201/CYD208 User’s Manual

Table A-2. Curve 1: DT-500DI-8A Voltage-Temp. Characteristics

Temp. PROM

BP # (K) Voltage

Temp. PROM

BP # (K) Voltage

Temp. PROM

BP # (K) Voltage

30 4.0 2.46386

4.2 2.44821

4.4 2.43188

4.6 2.41500

4.8 2.39781

29 5.0 2.37578

5.5 2.33823

6.0 2.29906

6.5 2.26440

28 7.0 2.23248

7.5 2.20480

8.0 2.17716

8.5 2.14994

27 9.0 2.12245

9.5 2.10065

10.0 2.07844

11.0 2.03712

12.0 1.99736

13.0 1.95641

26 14.0 1.91202

15.0 1.85236

16.0 1.79177

17.0 1.73193

25 18.0 1.66870

19.0 1.59215

20.0 1.51169

21.0 1.43234
24 22.0 1.34993
23 23.0 1.28434
22 24.0 1.23212
21 25.0 1.18995
20 26.0 1.16027
19 27.0 1.14015
18 28.0 1.12689

17 29.0 1.11741
16 30.0 1.11007
15 32.0 1.09942
14 34.0 1.09178
13 36.0 1.08559
12 38.0 1.07992

40.0 1.07502

45.0 1.06307

50.0 1.05136

55.0 1.03951

11 60.0 1.02744

65.0 1.01475

70.0 1.00193

10 75.0 0.98892

77.4 0.98264

80.0 0.97557

85.0 0.96216

90.0 0.94877

9 95.0 0.93535

100.0 0.92166

105.0 0.90798

110.0 0.89426

115.0 0.88052

120.0 0.86676

125.0 0.85298

8 130.0 0.83936

135.0 0.82531

140.0 0.81142

145.0 0.79749

150.0 0.78351

155.0 0.76950

160.0 0.75544

165.0 0.74135

7 170.0 0.72739

175.0 0.71308

180.0 0.69891

185.0 0.68469

190.0 0.67043

195.0 0.65615

200.0 0.64185

205.0 0.62754

210.0 0.61333

6 215.0 0.59901

220.0 0.58502

225.0 0.57099

230.0 0.55715

5 235.0 0.54327

240.0 0.52983

245.0 0.51639

250.0 0.50302

255.0 0.48965

260.0 0.47625

4 265.0 0.46292

270.0 0.44925

275.0 0.43559

280.0 0.42178

3 285.0 0.40797

290.0 0.39375

295.0 0.37951

300.0 0.36515

2 305.0 0.35078

310.0 0.33599

315.0 0.32121

320.0 0.30643

325.0 0.29159

1 330.0 0.27665

OMEGA Model CYD201/CYD208 User’s Manual

Table A-3. Curve 2: DT-500DRC-D Voltage-Temp. Characteristics

Temp. PROM

BP # (K) Voltage

Temp. PROM

BP # (K) Voltage

Temp. PROM

BP # (K) Voltage

1.4 2.5984

1.5 2.5958

1.6 2.5932

1.7 2.5906

1.8 2.5880

1.9 2.5854

30 2.0 2.5828

2.2 2.5735

2.4 2.5643

2.6 2.5551

2.8 2.5458

29 3.0 2.5366

3.2 2.5226

3.4 2.5086

3.6 2.4946

3.8 2.4807

4.0 2.4667

4.2 2.4527

4.4 2.4387

4.6 2.4247

4.8 2.4108

5.0 2.3968

5.5 2.3618

6.0 2.3269

6.5 2.2919

7.0 2.2570

7.5 2.2220

8.0 2.1871

8.5 2.1521

28 9.0 2.1172

9.5 2.0909

10.0 2.0646

11.5 2.0119

12.0 1.9592

27 13.0 1.9066

14.0 1.8338

26 15.0 1.7610

16.0 1.6984

25 17.0 1.6359

18.0 1.5646

19.0 1.4932

20.0 1.4219

24 21.0 1.3505

22.0 1.3006

23 23.0 1.2507

24.0 1.2114
22 25.0 1.1720
21 26.0 1.1486
20 27.0 1.1308
19 28.0 1.1190
18 29.0 1.1116
17 30.0 1.1058
16 32.0 1.0970
15 34.0 1.0902

36.0 1.0850

38.0 1.0798
14 40.0 1.0746

45.0 1.0633

50.0 1.0520
13 55.0 1.0407

60.0 1.0287

65.0 1.0166
12 70.0 1.0046

75.0 0.99172

80.0 0.97890

85.0 0.96609
11 90.0 0.95327

95.0 0.93987

100.0 0.92647

105.0 0.91307

110.0 0.89966

115.0 0.88626

120.0 0.87286

125.0 0.85946

10 130.0 0.84606

135.0 0.83228

140.0 0.81850

145.0 0.80472

150.0 0.79094

155.0 0.77716

160.0 0.76338

165.0 0.74961

9 170.0 0.73582

175.0 0.72170

180.0 0.70757

185.0 0.69344

190.0 0.67931

195.0 0.65518

200.0 0.65105

205.0 0.63693

210.0 0.62280

215.0 0.60867

8 220.0 0.59455

225.0 0.58080

230.0 0.56707

235.0 0.55334

7 240.0 0.53960

245.0 0.52649

250.0 0.51337

255.0 0.50026

260.0 0.48714

6 265.0 0.47403

270.0 0.46057

275.0 0.44711

280.0 0.43365

5 285.0 0.42019

290.0 0.40613

295.0 0.39208

300.0 0.37802

4 305.0 0.36397

310.0 0.34940

315.0 0.33482

320.0 0.32025

325.0 0.30568

330.0 0.29111

335.0 0.27654

340.0 0.26197

3 345.0 0.24739

350.0 0.23325

355.0 0.21911

360.0 0.20497

2 365.0 0.19083

370.0 0.17774

375.0 0.16464

1 380.0 0.15155

Appendix A A-3

OMEGA Model CYD201/CYD208 User’s Manual

Table A-4. Curve 3: DT-500DRC-E1 Voltage-Temp. Characteristics

Temp. PROM

BP # (K) Voltage

Temp. PROM

BP # (K) Voltage

Temp. PROM

BP # (K) Voltage

30 1.4 2.6591

1.5 2.6567

1.6 2.6542

1.7 2.6518

1.8 2.6494

1.9 2.6470

29 2.0 2.6446

2.2 2.6355

2.4 2.6265

2.6 2.6175

2.8 2.6084

28 3.0 2.5994

3.2 2.5868

3.4 2.5742

3.6 2.5616

3.8 2.5490

27 4.0 2.5364

4.2 2.5221

4.4 2.5077

4.6 2.4934

4.8 2.4791

5.0 2.4648

5.5 2.4290

6.0 2.3932

6.5 2.3574

7.0 2.3216

7.5 2.2858

8.0 2.2500

8.5 2.2142

26 9.0 2.1784

9.5 2.1516

10.0 2.1247

11.0 2.0708

12.0 2.0170

25 13.0 1.9632

14.0 1.9011

15.0 1.8390

16.0 1.7769

17.0 1.7148

18.0 1.6527

19.0 1.5724

20.0 1.4922

21.0 1.4120

22.0 1.3317

23.0 1.2837

24.0 1.2357
21 25.0 1.1877
20 26.0 1.1559
19 27.0 1.1365
18 28.0 1.1239
17 29.0 1.1150
16 30.0 1.1080
15 32.0 1.0981
14 34.0 1.0909
13 36.0 1.0848

38.0 1.0797
12 40.0 1.0746

45.0 1.0630

50.0 1.0515

55.0 1.0399
11 60.0 1.0284

65.0 1.0159

70.0 1.0035

75.0 0.9911

77.35 0.9849

80.0 0.9780

85.0 0.9649

90.0 0.9518

95.0 0.9388
9 100.0 0.9257

105.0 0.9122

110.0 0.8988

115.0 0.8853

120.0 0.8718

125.0 0.8584

8 130.0 0.8449

135.0 0.8311

140.0 0.8173

145.0 0.8035

150.0 0.7896

155.0 0.7758

160.0 0.7620

165.0 0.7482

7 170.0 0.7344

175.0 0.7202

180.0 0.7060

185.0 0.6918

190.0 0.6777

195.0 0.6635

200.0 0.6493

205.0 0.6351

210.0 0.6210

215.0 0.6068

6 220.0 0.5926

225.0 0.5789

230.0 0.5651

235.0 0.5514

240.0 0.5377

245.0 0.5246

250.0 0.5115

255.0 0.4984

260.0 0.4853

4 265.0 0.4722

270.0 0.4588

275.0 0.4454

280.0 0.4320

3 285.0 0.4186

290.0 0.4045

295.0 0.3904

300.0 0.3763

2 305.0 0.3622

310.0 0.3476

315.0 0.3330

320.0 0.3184

325.0 0.3038

1 330.0 0.2893

OMEGA Model CYD201/CYD208 User’s Manual

Table A-5. Curve 4: CTI Diode Voltage-Temp. Characteristics

Temp. PROM

BP # (K) Voltage

Temp. PROM

BP # (K) Voltage

Temp. PROM

BP # (K) Voltage

29 10.0 1.4000
28 11.0 1.3850
27 12.0 1.3656

13.0 1.3400

26 14.0 1.3161

15.0 1.2750

16.0 1.2350

17.0 1.1910
25 18.0 1.1500
24 19.0 1.1290
23 20.0 1.1162

21.0 1.1135

22.0 1.1109

23.0 1.1084

24.0 1.1058

25.0 1.1033

26.0 1.1007

27.0 1.0981

28.0 1.0955

29.0 1.0929

30.0 1.0903

32.0 1.0851

34.0 1.0799
22 36.0 1.0747

38.0 1.0693

40.0 1.0640

45.0 1.0505

50.0 1.0370

55.0 1.0235
21 60.0 1.0100
20 65.0 0.9958

70.0 0.9822

75.0 0.9690
19 77.4 0.9626

80.0 0.9560
18 85.0 0.9440
17 90.0 0.9314
16 95.0 0.9184
15 100.0 0.9049

105.0 0.8907
14 110.0 0.8769
13 115.0 0.8625

120.0 0.8500
12 125.0 0.8376
11 130.0 0.8245

135.0 0.8109
10 140.0 0.7971

145.0 0.7828

150.0 0.7685

155.0 0.7543

160.0 0.7400
9 165.0 0.7255

170.0 0.7114

175.0 0.6972

180.0 0.6830

185.0 0.6690

190.0 0.6545

8 195.0 0.6408

200.0 0.6270

205.0 0.6133

210.0 0.5995

215.0 0.5858

220.0 0.5720

225.0 0.5583

230.0 0.5445

235.0 0.5308

240.0 0.5170

245.0 0.5032

7 250.0 0.4896

255.0 0.4757

260.0 0.4620

265.0 0.4481

6 270.0 0.4341

275.0 0.4197
5 280.0 0.4050
4 285.0 0.3911

290.0 0.3775
3 295.0 0.3640

300.0 0.3510
2 305.0 0.3382

310.0 0.3243

315.0 0.3106
1 320.0 0.2968

Appendix A A-5

OMEGA Model CYD201/CYD208 User’s Manual

Table A-6. Curve 5: DT-500DI-8C Voltage-Temp. Characteristics

Temp. PROM

BP # (K) Voltage

Temp. PROM

BP # (K) Voltage

Temp. PROM

BP # (K) Voltage

29 4.0 2.6187

4.2 2.6074

4.4 2.5956

4.6 2.5834

4.8 2.5709

5.0 2.5580

28 5.2 2.5484

5.4 2.5312

5.6 2.5173

5.8 2.5033

6.0 2.4890

6.5 2.4524

7.0 2.4151

7.5 2.3773

8.0 2.3394

27 8.5 2.2976

9.0 2.2643

9.5 2.2277

10.0 2.1919

10.5 2.1566

11.0 2.1221

11.5 2.0881

12.0 2.0545

12.5 2.0211

13.0 1.9875

13.5 1.9537

14.0 1.9193

14.5 1.8843

15.0 1.8480

15.5 1.8110

16.0 1.7748

26 16.5 1.7441

17.0 1.7047

17.5 1.6702

18.0 1.6361

18.5 1.6022

19.0 1.5676

19.5 1.5316

20.0 1.4950

21.0 1.4218
25 22.0 1.3461
24 23.0 1.2840

23 24.0 1.2317
22 25.0 1.1900
21 26.0 1.1602
20 27.0 1.1402
19 28.0 1.1269
18 29.0 1.1173
17 30.0 1.1100
16 31.0 1.1039

32.0 1.0991

15 33.0 1.0949

34.0 1.0913

14 35.0 1.0879

36.0 1.0850

37.0 1.0822

13 38.0 1.0795

39.0 1.0770

40.0 1.0746

42.0 1.0697

12 44.0 1.0649

46.0 1.0603

48.0 1.0558

50.0 1.0512

52.0 1.0467

54.0 1.0421

56.0 1.0376

58.0 1.0330

11 60.0 1.0285

65.0 1.0168

70.0 1.0049

10 75.0 0.9930

77.4 0.9870

80.0 0.9805

85.0 0.9680

90.0 0.9553

9 95.0 0.9427

100.0 0.9297

105.0 0.9168

110.0 0.9038

115.0 0.8907

8 120.0 0.8777

125.0 0.8643

130.0 0.8510

135.0 0.8377

140.0 0.8243

145.0 0.8108

7 150.0 0.7974

155.0 0.7837

160.0 0.7701

165.0 0.7564

170.0 0.7427

175.0 0.7289

6 180.0 0.7152

185.0 0.7013

190.0 0.6874

195.0 0.6734

200.0 0.6595

205.0 0.6455

210.0 0.6315

215.0 0.6176

5 220.0 0.6036

225.0 0.5898

230.0 0.5761

235.0 0.5625

4 240.0 0.5490

245.0 0.5358

250.0 0.5226

255.0 0.4096

260.0 0.4966

265.0 0.4836

270.0 0.4705

275.0 0.4574

3 280.0 0.4442

285.0 0.4307

290.0 0.4171

295.0 0.4035

2 300.0 0.3898

305.0 0.3758

310.0 0.3618

315.0 0.3477

320.0 0.3336

325.0 0.3194

1 330.0 0.3054

OMEGA Model CYD201/CYD208 User’s Manual

Table A-7. Curve 6: CY-7 Voltage-Temp. Characteristics

Temp. PROM

BP # (K) Voltage

Temp. PROM

BP # (K) Voltage

BP # (K) Voltage

Temp. PROM

29 1.4 1.69808

1.5 1.69674

1.6 1.69521

1.7 1.69355

1.8 1.69177

1.9 1.68987

28 2.0 1.68912

2.1 1.68574

2.2 1.68352

2.3 1.68121

2.4 1.67880

2.5 1.67632

2.6 1.67376

2.7 1.67114

2.8 1.66845

2.9 1.66571

3.0 1.66292

3.1 1.66009

3.2 1.65721

3.3 1.65430

3.4 1.65134

3.5 1.64833

3.6 1.64529

3.7 1.64219

27 3.8 1.64112

3.9 1.63587

4.0 1.63263

4.2 1.62602

4.4 1.61920

4.6 1.61220

4.8 1.60506

5.0 1.59782

5.2 1.59047

5.4 1.58303

5.6 1.57551

5.8 1.56792

6.0 1.56027

6.5 1.54097

7.0 1.52166

7.5 1.50272

8.0 1.48443

8.5 1.46700

26 9.0 1.44850

9.5 1.43488

10.0 1.42013

10.5 1.40615

11.0 1.39287

11.5 1.38021

25 12.0 1.36687

12.5 1.35647

13.0 1.34530

13.5 1.33453

14.0 1.32412

14.5 1.31403

15.0 1.30422

24 15.5 1.29340

16.0 1.28527

16.5 1.27607

17.0 1.26702

17.5 1.25810

18.0 1.24928

18.5 1.24053

19.0 1.23184

19.5 1.22314

23 20.0 1.21555

21.0 1.19645

22.0 1.17705

23.0 1.15558
22 24.0 1.13598
21 25.0 1.12463
20 26.0 1.11896
19 27.0 1.11517
18 28.0 1.11202

29.0 1.10945

30.0 1.10702
17 31.0 1.10465

32.0 1.10263

33.0 1.10060

34.0 1.09864

35.0 1.09675
16 36.0 1.09477

37.0 1.09309

38.0 1.09131

39.0 1.08955

40.0 1.08781

42.0 1.08436
15 44.0 1.08105

46.0 1.07748

48.0 1.07402

50.0 1.07053

52.0 1.06700

54.0 1.06346

56.0 1.05988

58.0 1.05629
14 60.0 1.05277

65.0 1.04353

70.0 1.03425

75.0 1.02482

13 77.4 1.02044

80.0 1.01525

85.0 1.00552

90.0 0.99565

12 95.0 0.98574

100.0 0.97550

105.0 0.96524

110.0 0.95487

11 115.0 0.94455

120.0 0.93383

125.0 0.92317

130.0 0.91243

135.0 0.90161

10 140.0 0.89082

145.0 0.87976

150.0 0.86873

155.0 0.85764

160.0 0.84650

9 165.0 0.83541

170.0 0.82404

175.0 0.81274

180.0 0.80138

185.0 0.78999

190.0 0.77855

8 195.0 0.76717

200.0 0.75554

205.0 0.74398

210.0 0.73238

215.0 0.72075

220.0 0.70908

225.0 0.69737

7 230.0 0.68580

235.0 0.67387

240.0 0.66208

245.0 0.65026

250.0 0.63841

255.0 0.62654

260.0 0.61465

265.0 0.60273

270.0 0.59080

275.0 0.57886

6 280.0 0.56707

285.0 0.55492

290.0 0.54294

295.0 0.53093

300.0 0.51892

Appendix A A-7

OMEGA Model CYD201/CYD208 User’s Manual

Table A-7. Curve 6: CY-7 Voltage-Temp. Characteristics

Temp. PROM

BP # (K) Voltage

305.0 0.50689

310.0 0.49484

315.0 0.48278

320.0 0.47069

325.0 0.45858

330.0 0.44647

335.0 0.43435

5 340.0 0.42238

345.0 0.41003

350.0 0.39783

355.0 0.38561

360.0 0.37337

Temp. PROM

BP # (K) Voltage

365.0 0.36110

370.0 0.34881

375.0 0.33650

380.0 0.32416

385.0 0.31180

4 390.0 0.29958

395.0 0.28700

400.0 0.27456

405.0 0.26211

410.0 0.24963

415.0 0.23714

420.0 0.22463

Temp. PROM

BP # (K) Voltage

425.0 0.21212

430.0 0.19961

3 435.0 0.18696

440.0 0.17464

445.0 0.16221

450.0 0.14985

455.0 0.13759

2 460.0 0.12536

465.0 0.11356

470.0 0.10191

1 475.0 0.09032

(Continued)

NOTES









NOTES









TEMPERATURE



Thermocouple, RTD & Thermistor Probes & Assemblies



Connector Systems and Panels



Wire: Thermocouple, RTD, and Thermistor



Calibrators and Ice Point References



Recorders, Controllers, and Process Monitors



Data Acquisition Modules and Data Loggers



Computer Sensor Interface

PRESSURE/STRAIN



Transducers



Strain Gauges



Load Cells



Pressure Gauges



Instrumentation

FLOW



Rotameters



Flowmeter Systems



Air Velocity Indicators



Turbine/Paddlewheel Systems



Vortex Meters and Flow Computers

pH



Electrodes



Benchtop/Laboratory Meters



Controllers



Calibrators/Simulators



Transmitters