Cannon CT-1000HT User Manual

CONTENTS

INTRODUCTION 1

Overview ............................................................................................................................ 1

Safety features .................................................................................................................... 2

Operator safety ................................................................................................................... 3

Specifications ..................................................................................................................... 4

UNPACKING AND ASSEMBLY 5

Unpacking the CT-1000HT ................................................................................................ 5

Assembly procedure ........................................................................................................... 6

Glass jar installation ........................................................................................................... 6

Inserting viscometer tubes/thermometers........................................................................... 9

Power/probe connections.................................................................................................... 9

Attaching the vent hose .................................................................................................... 10

Filling the bath.................................................................................................................. 10

Draining the Bath ............................................................................................................. 11

BATH OPERATION 13

Front panel........................................................................................................................ 13

Inserting viscometer tubes/thermometers......................................................................... 13

Applying power ................................................................................................................ 14

Setting the bath temperature............................................................................................. 15

Fixed temperature adjustments............................................................................. 15

Variable temperature adjustments......................................................................... 15

Attaining lower temperatures ............................................................................... 16

Adjusting the High Temperature Limit Control ................................................... 16

WARRANTY/RETURN INFORMATION 17

Products limited warranty................................................................................................. 17

Reagent and chemical warranty........................................................................................ 17

Returning a product to CANNON®.................................................................................. 18

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CT-1000HT Constant Temperature Bath

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APPENDIX A — CT-1000HT PROBLEM ANALYSIS 19

APPENDIX B — CHOOSING A TEMPERATURE BATH

LIQUID 21

APPENDIX C — CT-1000HT SPARE PARTS LIST 23

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CT-1000HT Constant Temperature Bath

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CHAPTER

Overview

CT-1000HT function

Temperature range/stability

INTRODUCTION

The CANNON maintain precise temperatures at a wide range of settings for accurate viscosity measurements. Because of its temperature stability and ease of use, it is also suitable for any other application where temperatures must be maintained within close tolerances.

The CANNON® CT-1000HT will maintain temperatures of 25°C to 100°C within 0.01°C, and temperatures of 101°C to 200°C within

0.03°C. The temperature stability of the CT-1000HT meets the accuracy requirements of ASTM D 445 for kinematic viscosity measurements.

A built-in cooling coil, when connected to tap water or a cooling system, permits operation below or slightly above ambient temperature. (T emperature stability at or below ambient may vary depending on the quality of the external cooling unit.)

CT-1000HT Constant Temperature Bath is designed to

Figure 1: The CT-1000

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CT-1000HT Constant Temperature Bath

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Manual

NOTE

Temperature selection

Bath description

This manual is intended to provide information on the installation,

characteristics and operation of the CANNON

CT-1000HT Constant

T emperature Bath.

The CT-1000 video does not contain information regarding temperature selection options above 150°C.

T en of the most commonly-used temperatures for kinematic viscosity measurement can be set by using a switch on the bath front panel. The bath will equilibrate within a fraction of one degree of the desired temperature. A fine-tuning control permits further temperature adjustments. By using the variable temperature adjustment procedure, nearly any temperature within the operating range of the instrument may be obtained.

The bath chamber is a cylindrical clear vessel 300 mm (12 inches) in diameter and 300 mm (12 inches) high. A stainless steel baffle is located in the center of the bath and provides a convenient backdrop for viewing viscometers placed in the bath. The top cover contains seven round holes 51 mm (two inches) in diameter for insertion of viscometer holders. Two additional holes are provided for thermometers. T win fluorescent lamps provide glare-free illumination of the bath.

Safety features

Overheat thermistor

Thermistor detection/cutoff

Liquid-level control float

A solid-state control circuit equipped with a stainless steel-encased thermistor provides proportional temperature control. A motor-driven stirrer ensures that a uniform temperature is maintained throughout the bath.

The bath housing is fabricated from heavy aluminum and coated with a corrosion-resistant epoxy . The top cover consists of three layers; a stainless steel top surface, an insulating layer, and a bottom stainless steel heat reflector.

A thermistor in the bath senses any over -temperature fault condition. If such a condition occurs, all power is removed from the bath until an operator resets the over-temperature limit circuit.

If the control thermistor is disconnected, all power to the bath heaters is cut off.

Operation of the bath is not possible unless it is filled with liquid to a safe operating level. A liquid-level control float prevents the control circuit from heating the bath until the safe operating level is attained. The bath heaters are automatically turned off if the bath liquid drops below the minimum safe level.

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CT-1000HT Constant Temperature Bath

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Operator safety

Please observe the following safety procedures and notices for proper operation of your CT-1000HT bath. Deviation from the installation, operation or maintenance procedures described in this manual may result in a hazardous situation and may void the manufacturer's warranty .

• Make sure that your unit is operated only by qualified personnel

• Make sure that you read and understand all operating instructions and safety precautions listed in this manual before installing or operating your unit. If you have questions regarding instrument operation or documentation, contact CANNON

Instrument Com-

pany.

• Transport the unit with care. Sudden jolts or drops may cause damage to components.

• Observe all warning labels.

• Never remove warning labels.

• Never operate damaged or leaking equipment.

• Never operate the equipment with damaged mains power cables.

• The instrument power cord should only be connected to a suitable AC mains power source (with protective earth ground) matching the specifications of the S/N label.

• Position power cords so that they are not likely to be walked on or pinched by items placed on or against them. Keep all connections as neat as possible.

• To disconnect the power cord, pull it out by the plug. Never pull the cord itself.

• Never operate the unit without appropriate levels of approved bath fluid in the bath.

• Do not add bath fluid to the bath unless the bath temperature is within 10°C of ambient.

• Do not splash liquids on the external surfaces of the bath, including the Pyrex® bath jar.

• Do not obstruct the cooling vent on the top of the bath.

• Always turn off the unit and disconnect the mains cable from the power source before performing approved service or maintenance procedures, or before moving the unit.

• Always empty the bath before moving the unit.

• Refer all service and repairs to qualified personnel.

• Do not attempt to service the unit beyond the service and/or repair procedures detailed in this manual. Contact CANNON® Instrument Company for all additional service/repair needs.

General Caution

In addition to the warnings listed above, additional cautions are posted throughout the manual. These warnings may be designated by an appropriate symbol inside an equilateral triangle. General cautions are indicated with an exclamation point (see diagram, left). Read and follow these important instructions. Failure to observe these instructions can result in permanent damage to the unit, significant property damage, and personal injury.

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CT-1000HT Constant Temperature Bath

Instrument Company

Hot surface cautions (see diagram, left) may be attached on or near hot surfaces of the instrument. Avoid touching these surfaces during instrument operation above 50°C.

Hot Surface Caution

The Protective Conductor Terminal symbol is used to indicate required ground connections for your instrument electrical supply .

Protective Conductor

WARNING

MAINS

AC Power Input Symbol

( O )

Supply OFF Symbol

Specifications

When supplying power to this instrument, connect the protective ground (earth) terminals of the instrument to the protective conductor of the (supplied) line (MAINS) power cord. The main plug for the power cord should only be inserted in a socket outlet (receptacle) provided with a protective ground (earth) contact.

Do not use an extension cord (power

cable) without a protective conductor (grounding). The ~MAINS symbol indicates instructions or connections for the AC

power supply . The AC Power input must match the electrical specifications listed on the label on the rear panel of the instrument. The supplied AC Mains power cord must be attached to the connector labelled ~MAINS. This connection serves as a means of disconnect and should be readily accessible.

The (O) symbol indicates the OFF position for the electrical switches for your unit (AC Mains or accessories).

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CT-1000HT Constant Temperature Bath

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CHAPTER

CAUTION

UNPACKING AND ASSEMBLY

This chapter of the manual provides assistance in unpacking and assembling the CT-1000HT Constant T emperature Bath. For additional assistance, consult the instructional video.

CT-1000HT components are heavy. Obtain necessary assistance before moving heavier packed and unpacked items.

Unpacking the CT-1000HT

The CANNON® CT-1000HT Constant Temperature Bath is shipped in two boxes:

 Box 1 contains the glass jar, front glass panel pieces, jar gasket top,

trimpot adjust screwdriver, Allen wrench, seven hole covers, rubber thermometer holder and instruction manual.

 Box 2 contains the bath housing, including the electronics drawer.

Box 2 also contains a smaller box with the motor and stirrer, including the impellers (2) and mounting plate.

The bath unit housing is shipped completely assembled. However, the glass jar, the glass panels, and the motor and stirrer must be installed in it. T o allow this, some disassembly of the bath unit housing is required. The tools required are a utility knife, Phillips screwdriver, and a 1/8" Allen wrench. The Allen wrench is included with the bath.

Figure 2: Primary bath components after unpacking

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CT-1000HT Constant Temperature Bath

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Assembly procedure

1. Unpack the bath unit housing.

2. Move the bath unit housing to its permanent location on the laboratory bench.

3. Remove all eight screws from the stainless steel top covers (see Figure 3).

4. Disconnect all probes, heaters, and float switch from the rear panel.

Figure 3: Removing screws from top cover

5. Remove the front top cover and rear top cover (see Figure 4 and 5). Use caution when removing the rear top cover because the temperature control probes and heating elements are attached to it.

Figure 4: Removing front cover

Figure 5: Removing rear cover

Glass jar installation

1. Remove the glass jar from its

CAUTION

The glass jar is heavy. Use caution when lifting it.

2. Make sure the Viton® support

3. Place the Viton

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box.

ring is seated properly around the bottom jar opening in the bath unit (see Figure 6).

rubber gasket around the top rim of the jar (see

Figure 6: Checking support ring

Figure 7, next page). The ends of the gasket should meet with no gap when placed around the rim. If necessary , trim one end of the gasket to achieve a snug fit.

CT-1000HT Constant Temperature Bath

Instrument Company

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