Cannon CT-2000 Manual de usuario

CANNON®CT-2000 Constant Temperature Bath

Revision 1.0g—February, 2012; CANNON®Instrument Company

2139 High Tech Road • State College, PA 16803 • USA

CONTENTS

1INTRODUCTION 1

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

Safety features .................................................................................................................... 3

Operator Safety ................................................................................................................. 3

2UNPACKING AND ASSEMBLY 5

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

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

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

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

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

3BATH OPERATION 13

Applying power ................................................................................................................ 13

Cold Start.............................................................................................................. 13

Warm Start ............................................................................................................ 14

Self-test sequence ............................................................................................................. 14

Front panel operations ...................................................................................................... 16

Using the keypad .................................................................................................. 17

Setting bath temperature................................................................................................... 18

Calibrating the CT-2000 ................................................................................................... 18

MENU options.................................................................................................................. 20

Change to (C/F) .................................................................................................... 20

Bath temperature offsets....................................................................................... 20

Communication options.................................................................................................... 21

Full duplex (point-to-point) connections.............................................................. 23

Half duplex and polled (multi-drop) operations................................................... 23

Commands, queries & responses.......................................................................... 23

CANNON®CT-2000 Constant Temperature Bath

Revision 1.0g—February, 2012; CANNON®Instrument Company

2139 High Tech Road • State College, PA 16803 • USA

AAPPENDIX A —MODEL CT-2000 PROBLEM ANALYSIS 29

BAPPENDIX B —CORRECTING SHAFT & IMPELLER

MISALIGNMENT 31

Shaft run-out correction.................................................................................................... 31

CAPPENDIX C —CHOOSING A TEMPERATURE BATH LIQUID 33

DAPPENDIX D —CT-2000 SPARE PARTS LIST 35

EAPPENDIX E — WARRANTY/RETURN INFORMATION 37

Products limited warranty................................................................................................. 37

Reagent and chemical warranty........................................................................................ 37

Returning a product to CANNON®.................................................................................. 38

CANNON®CT-2000 Constant Temperature Bath

Revision 1.0g—February, 2012; CANNON®Instrument Company

2139 High Tech Road • State College, PA 16803 • USA

CHAPTER

INTRODUCTION

Overview

Scope of the manual

This manual is intended to provide information on the installation,

characteristics and operation of the CANNON®CT-2000 Constant

Temperature Bath.

The CT-2000

The CANNON®CT-2000 Constant Temperature Bath is designed to

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 hundredths of one degree Celsius.

Temperature range

The CANNON®CT-2000 is designed to maintain temperatures from

10°C to 150°C.

Figure 1: The CT-2000 Constant Temperature Bath

CANNON®CT-2000 Constant Temperature Bath

Revision 1.0g—February, 2012; CANNON®Instrument Company

2139 High Tech Road • State College, PA 16803 • USA

Temperature selection

The CT-2000 offers convenient keypad entry of temperature settings up

to three decimal places over the entire temperature range of the instru-

ment. The bath temperature will remain stable within hundredths of one

degree of the temperature setting.

Temperature stability

The CANNON®CT-2000 is capable of maintaining temperatures of 10°C

to 100°C within 0.01°C and temperatures of 101°C to 150°C within

0.03°C or closer. (Temperature stability at or below ambient may vary

depending on the quality of the external cooling unit.)

Bath description

The bath chamber is a cylindrical clear vessel 300 mm (12 inches) in

diameter and 300 mm (12 inches) high. A stainless steel baffle coated

with white PTFE 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 smaller holes are provided for

thermometers. Twin fluorescent lamps provide glare-free illumination of

the bath.

Microprocessor circuitry, functioning in tandem with a pair of heaters

and a stainless steel-encased RTD provides stable and accurate tempera-

ture 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.

ASTM D 445 specifications

The CT-2000 temperature control provides the accuracy required by

ASTM D 445 for kinematic viscosity measurements.

Cooling coil

A built-in cooling coil, when connected to tap water or a cooling system,

permits operation to 10° Celsius.

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CANNON®CT-2000 Constant Temperature Bath

Revision 1.0g—February, 2012; CANNON®Instrument Company

2139 High Tech Road • State College, PA 16803 • USA

Safety features

Overheat thermistor

A thermistor in the bath senses any over-temperature fault condition. If

such a condition occurs, all power is removed from the bath heaters until

an operator resets the over-temperature limit circuit.

RTD cutoff detection

If the control RTD is disconnected, all power to the bath heaters is cut

off.

Liquid-level sensor

Operation of the bath is not possible unless it is filled with liquid to a safe

operating level. A liquid-level sensor 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.

Operator Safety

All technicians who use the CT-2000 should follow these basic safety

procedures:

Use appropriate safety precautions for working with high-tempera-

ture liquids/equipment.

Follow instructions in this manual regarding use and maintenance of

the CT-2000.

Do not place the CT-2000 system on an unstable cart or stand. The

CT-2000 should be placed on a stable laboratory table or bench.

If any liquids are spilled into the electronic components of the CT-

2000, remove power from the unit and contact CANNON®Instru-

ment Company immediately.

Do not position power cords so that they are likely to be walked on

or pinched by items placed on or against them. Keep all connections

as neat as possible.

If the CT-2000 will not be used for an extended period of time,

unplug the power cord from the wall outlet. To disconnect the power

cord, pull it out by the plug. Never pull the cord itself.

CAUTION Do not attempt to service the CT-2000 system beyond the basic installa-

tion and troubleshooting guides provided with this manual. Contact

CANNON®Instrument Company regarding service and repair needs.

CAUTION The bath fluid used with the CT-2000 may be dangerous. Use the proper

safety precautions when handling the bath fluid in use (refer to the

Material Safety Data Sheet included with the bath fluid for more detail.)

CANNON®CT-2000 Constant Temperature Bath

Revision 1.0g—February, 2012; CANNON®Instrument Company

2139 High Tech Road • State College, PA 16803 • USA

This page intentionally left blank.

CANNON®CT-2000 Constant Temperature Bath

Revision 1.0g—February, 2012; CANNON®Instrument Company

2139 High Tech Road • State College, PA 16803 • USA

CHAPTER

UNPACKING AND ASSEMBLY

This chapter of the manual provides assistance in unpacking and assem-

bling the CT-2000 Constant Temperature Bath.

Unpacking the CT-2000

1. Remove all components from the shipping container(s).

2. Remove any and all packing materials (Styrofoam, etc.) from the

components.

3. Verify reception of shipped materials by comparing equipment items

with packing/parts list(s). Report missing items to CANNON®

Instrument Company immediately.

4. Inspect each component for signs of damage. Report damages to the

shipper and to the CANNON®Instrument Company immediately.

Damaged items

Retain all packing materials until the instrument is connected and func-

tioning properly. If any component(s) must be returned to CANNON®

Instrument Company, the damaged item(s) should be packaged in the

original shipping container. Refer to APPENDIX E of this manual for

instructions on returning defective equipment. Customers outside the

United States should contact the local CANNON®agent for procedures

on returning products to CANNON® .

The CANNON®CT-2000 Constant Temperature Bath is shipped in

several boxes containing the following:

bath housing, including the electronics drawer

motor and stirrer, including the impeller and mounting plate

glass bath jar Allen wrench

front glass panel pieces (2) seven hole covers

jar gasket top and bottom rubber thermometer holder

instruction manual

The bath unit housing is shipped completely assembled. However, the

glass jar, the glass panels, and the motor and stirrer must be installed. To

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. TheAllen wrench is included with the bath.

CANNON®CT-2000 Constant Temperature Bath

Revision 1.0g—February, 2012; CANNON®Instrument Company

2139 High Tech Road • State College, PA 16803 • USA

Assembly procedure

1. Unpack the bath unit housing

and move it to its permanent

location on a stable labora-

tory bench or table.

2. Remove all eight screws from

the stainless steel top covers

(see Figure 2).

3. Disconnect all external

cabling (probes, heaters, and

float switch) from the upper

rear panel of the CT-2000.

4. Remove the front top cover and rear top cover (see Figures 3 and 4).

Use caution when removing the rear top cover because the tempera-

ture control probes and heating elements are attached to it.

Glass jar installation

1. Remove the glass jar from its box.

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

2. Make sure the rubber

support ring is seated

properly around the

bottom jar opening in the

bath unit (see Figure 5).

3. Place the rubber gasket

around the top rim of the

jar (see Figure 6). The

Figure 5: Seating the support ring

Figure 2: Detaching top cover

Figure 3: Removing

front top cover

Figure 4: Removing

back top cover

CANNON®CT-2000 Constant Temperature Bath

Revision 1.0g—February, 2012; CANNON®Instrument Company

2139 High Tech Road • State College, PA 16803 • USA

rubber may have to be

trimmedslightly to allow the

ends of the rubber gasket to

meet with no gap when

placed around the rim.

4. Remove the large piece of

foam packing from the inside

of the cabinet. Also remove

the small piece of foam from

the float level, located on the

upper left-hand corner of the

inside of the cabinet.

5. Lower the glass jar into the

cabinet so it seats evenly on

the rubber support ring.

6. Unwrap the two glass

panels. Place the thinner of

the two pieces of glass in the

slot closest to the jar (see

Figure 7).

7. Place the wider (tempered)

piece of glass in the front

slot furthest away from the

jar. The middle slot is left

empty as a vapor barrier.

8. Replace the rear top cover.

Align the four holes, then

insert and tighten the screws.

9. Replace the front top cover. Line up the four holes, then insert and

tighten the screws.

10. To ensure that the gasket forms a tight seal with the top covers of the

bath, proceed as follows:

11. Loosen the IEC lock screw securing the AC power cord to the rear

panel of the electronics drawer. Then unplug all three cables (AC

power, rectangular Cinch connector and round Amp connector) from

the rear of the electronics drawer.

12. Pull out the electronics drawer using the handles provided on the

front of the unit. Press down or pull up on the plastic release bars on

either side of the drawer track to release the drawer, then pull the

drawer completely free of the unit and set it aside.

13. When the drawer is removed, locate the four ¼-20 set screws visible

at the top of the drawer opening underneath the bath.

Figure 6: Seating the gasket

Figure 7: Placing inner glass panel

CANNON®CT-2000 Constant Temperature Bath

Revision 1.0g—February, 2012; CANNON®Instrument Company

2139 High Tech Road • State College, PA 16803 • USA

14. Turn the set screws clockwise with the Allen wrench (included with

the bath) until the top of the jar forms a tight seal with the covers.

Make sure you tighten the set screws uniformly so the jar remains

level.

15. Run the AC cord through the rear panel opening.

16. Replace the drawer in the slide tracks and push the drawer back into

its opening. Insert the two power plugs into the rear of the drawer

assembly.

Motor-stirrer

Complete the assembly of the bath by inserting the motor-stirrer per the

instructions below:

1. Take the motor/stirrer from

its box. Remove the two

screws on the top heater

housing and lift off the

housing (see Figure 8).

2. Check the motor-stirrer

impeller blades to make

sure that the flat sections

all lie in the same plane

(seeAPPENDIX B), then

insert the motor stirrer into

the opening provided (see

Figure 9).

NOTE To avoid accidental bending of

the motor shaft, do not hold the

motor assembly by the shaft.

Use care when inserting the

motor shaft and impeller to

prevent damage to delicate

components. Two screws

located on either side of the

opening for the motor stirrer

serve as locating pins for the

motor support pad. Do not

remove these screws; the

holes in the pad fit loosely over

their heads. The motor line

cord should point toward the

rear of the bath (offset slightly

to the right or left). The motor

stirrer should now lie flat on the

top of the bath.

3. Connect all plugs and probes to the correspondingly labeled sockets

at the rear of the CT-2000 bath unit as follows (see Figure 10):

Figure 8: Removing heater housing

Figure 9: Installing motor-stirrer

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