Thermo Scientific NESLAB RTE Instruction Manual

Page 1

No part of this publication may be reproduced or reprinted except for personal use without the prior permission of Thermo Electron.

NESLAB RNESLAB R

NESLAB R

NESLAB RNESLAB R

Refrigerated BathRefrigerated Bath

Refrigerated Bath

Refrigerated BathRefrigerated Bath

Thermo Manual P/N U00694 Rev. 07/13/05

Installation-Operation-Installation-Operation-

Installation-Operation-

Installation-Operation-Installation-OperationBasic ServiceBasic Service

Basic Service

Basic ServiceBasic Service

Visit our Web site at:

http://www.thermo.com/tchttp://www.thermo.com/tc

http://www.thermo.com/tc

http://www.thermo.com/tchttp://www.thermo.com/tc

Product Service Information, Applications Notes, MSDS Forms, e-mail.

TETE

Voice Info: (800) 258-0830

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Table of Contents

Preface

Compliance ..............................................................................................................2

WEEE Compliance...................................................................................................2

Unpacking ................................................................................................................2

Warranty................................................................................................................... 2

After-sale Support ....................................................................................................3

NES-care Extended Warranty Contract...................................................................3

Copyright .................................................................................................................3

Feedback ................................................................................................................. 3

Section I Safety

Warnings..................................................................................................................4

Section II General Information

Quick Reference Operating Procedures................................................................. 6

Description...............................................................................................................7

Specifications...........................................................................................................7

Section III Installation and Operation

Site .........................................................................................................................11

Electrical Requirements......................................................................................... 12

Plumbing Requirements ........................................................................................14

Fluids ..................................................................................................................... 16

Filling Requirements..............................................................................................17

Controller (Digital One/Digital Plus) ......................................................................17

St art Up/Shut Down................................................................................................19

Setup/Tuning Loop ................................................................................................21

Controller (Digital Plus) .........................................................................................22

Computer Setup Loop .......................................................................................... 24

Timer Setup Loop ..................................................................................................25

Offset Setup Loop ..................................................................................................26

Analog A I/O Port - Optional...................................................................................27

High Temperature Cutouts.....................................................................................28

Nitrogen Purge.......................................................................................................29

Accessories............................................................................................................29

Section IV Basic Maintenance

Reservoir Fluid ......................................................................................................33

Reservoir Cleaning ................................................................................................33

Algae ......................................................................................................................33

Condenser Cleaning ..............................................................................................33

Internal Temperature Sensor (rtd1) Calibration .................................................... 34

External Temperature Sensor (rtd2) Calibration ...................................................35

Optional Analog Port/Calibration - Optional..........................................................36

Section V T roubleshooting

Error Codes ...........................................................................................................37

External Sensor Connector ...................................................................................38

Checklist.................................................................................................................39

Service Assistance.................................................................................................40

PID V alues..............................................................................................................40

BOM Decoder ........................................................................................................41

Displaying Software Version Number ....................................................................41

Appendix A Fluids Appendix B NC Serial Communications Protocol Appendix C International Quick Reference Operating Procedures W ARRANTY

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Compliance

WEEE Compliance

Preface

UL Listed to UL3101-1 (UL61010A-1)

Certified to CSA C22.2 No. 1010.1

Complies with IEC/EN 61010-1

Products tested and found to be in compliance with the requirements defined in the EMC standards defined by 89/336/EEC as well as Low Voltage Directive (LVD) 73/23/EEC can be identified by the CE label on the rear of the unit. The testing has demonstrated compliance with the following directives:

LVD, 73/23/EEC EN 610010-1:1993 EMC, 89/336/EEC EN 61326-1:1998 For any additional information, refer to the Letter of Compliance that shipped

with the unit (Declaration of Conformity).

This product is required to comply with the European Union’s Waste Electrical & Electronic Equipment (WEEE) Directive 2002/96/EC. It is marked with the following symbol:

Unpacking

Warranty

Thermo Electron has contracted with one or more recycling/disposal companies in each EU Member State, and this product should be disposed of or recycled through them. Further information on Thermo Electron’s compliance with these Directives, the recyclers in your country, and information on Thermo Electron products which may assist the detection of substances subject to the RoHS Directive are available at: www.thermo.com/WEEERoHS

Retain all cartons and packing material until the unit is operated and found to be in good condition. If the unit shows external or internal damage contact the transportation company and file a damage claim. Under ICC regulations, this is your responsibility.

Units have a warranty against defective parts and workmanship for 24 months from date of shipment. See back page for more details.

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After-sale Support

Thermo Electron Corporation is committed to customer service both during and after the sale. If you have questions concerning the unit operation, contact our Sales Department. If your unit fails to operate properly, or if you have questions concerning spare parts or Service Contracts, contact our Service Department.

Before calling, please obtain the following information:

- unit BOM number_________________________________

- unit serial number ________________________________

- unit software version ______________________________

- voltage of power source ____________________________

The unit’s BOM number and serial number are printed on the name plate label located on the rear of the unit. See page 41 for instructions on how to decode your unit's BOM number. See page 41 for instructions on how to display the software version.

NES-care Extended

Warranty Contract

S/N: 101039026

• Extend p arts and labor coverage for an additional year.

• Worry-free operation.

• Control service costs.

• Eliminate the need to generate repair orders.

• No unexpected repair costs.

Other contract options are available. Please contact Thermo for more information.

Feedback

We appreciate any feedback you can give us on this manual. Please e-mail us at neslabmanuals@thermo.com. Be sure to include the manual part number and the revision date listed on the front cover.

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Warnings

Section I Safety

Warnings are posted throughout the manual. These warnings are designated by an exclamation mark inside an equilateral triangle and text highlighted in bold. Read and follow these important instructions. Failure to observe these instructions can result in permanent damage to the unit, significant property damage, or personal injury or death.

The lightning flash with arrow symbol, within an equilateral triangle, is intended to alert the user to the presence of non-insulated "dangerous voltage" within the unit's enclosure. The voltage may be of significant magnitude to constitute a risk of electrical shock.

This label, engraved into the front of the tank lip, indicates the presence of hot surfaces.

Make sure you read and understand all instructions and safety precautions listed in this manual before installing or operating your unit. If you have any questions concerning the operation of your unit or the information in this manual, contact our Sales Department.

Performance of installation, operation, or maintenance procedures other than those described in this manual may result in a hazardous situation and may void the manufacturer's warranty.

Transport the unit with care. Sudden jolts or drops can damage the refrigeration lines. The units weigh approximately: RTE 7, 60 pounds (27 kilograms); RTE 10, 68 pounds (31 kilograms); RTE 17, 71 pounds (32 kilograms); RTE 740, 87 pounds (39 kilograms). Units should be transported with equipment designed to lift these weights.

Observe all warning labels. Never remove warning labels. Never operate damaged or leaking equipment. Never operate the unit without bath fluid in the bath. The user is responsible for the fluid used. Never use pure ethylene

glycol as a bath fluid, the flash point of 100% ethylene glycol is 111°C. 100% ethylene glycol may produce flammable vapors that can be ignited by an open flame or an ignition source. When mixed with water, ethylene glycol is not flammable. Also, at high temperatures pure ethylene glycol may produce hazardous vapors.

Always turn off the unit and disconnect the line cord from the power source before performing any service or maintenance procedures, or before moving the unit.

Always empty the bath before moving the unit. Never operate equipment with damaged line cords. Refer service and repairs to a qualified technician.

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Indicates heater status. See page 17.

General Information

Section II General Information

Press to start/stop the unit. See page 17.

Indicates refrigeration system status. See page 17.

Indicates the controller is displaying the setpoint. Press the arrow buttons to change the value. See page 18.

Press to mute the alarm. See page

22. Digital Plus controller only.

Press to select external sensor. See page 22. Digital Plus controller only.

Indicates the controller is displaying the unit's low temperature alarm setpoint. Press the arrow buttons to change the value. See page 18.

Press to select the serial communication mode. See page 22. Digital Plus controller only.

Controller. See page 17.

Press to select the timer function. See page 23 Digital Plus controller only.

Press to change the displayed value. See page 17.

Press to sequence through the three indicators and accept the displayed value. See page 17. NOTE: None of the three setpoint indicators are visible unless this key is pressed.

Press to select the

temperature offset mode. See page 23.

Digital Plus controller only.

Indicates the controller is displaying the high temperature alarm setpoint. Press the arrow buttons to change the value. See page 18.

Condenser Access Panel. See page 33.

Reservoir. See page 16.

High Temperature Cutout. See page 28.

Autorefill connection. See page 29.

RS-232/RS-485 connections. See Appendix B. Digital Plus controller only.

1/8"OD Autorefill fluid connection. See page 29.

1/*4" MPT Pumping

Supply Connection. See page 14.

Drain. See page 14.

Optional External Sensor Connector. Digital Plus controller only.

Analog Output Connector. Digital Plus controller only. See page 27.

Circuit Breaker(s).

Power connection. See page 12.

1/8"OD N2 Nitrogen Purge. See page 29.

1/4" MPT Pumping Return Connection. See

page 14.

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Quick Reference Operating Procedures

Installation

Locate the unit on a sturdy work area. Ambient temperatures should be inside the range of +50°F to +104°F (+10°C to +40°C). The maximum operating relative humidity is 80%.

Never place the unit in a location where excessive

General Information

heat, moisture, or corrosive materials are present. The unit has an air-cooled refrigeration system. Air

is drawn through the front panel and discharged through the rear panel. The unit must be positioned so the air intake and discharge are not impeded. A minimum clearance of 12 inches (30 centimeters) at the front and rear of the unit is necessary for adequate ventilation. Inadequate ventilation will reduce cooling capacity and, in extreme cases, can cause compressor failure.

Excessively dusty areas should be avoided and a periodic cleaning scheduleshould be instituted.

The unit will retain its full rated capacity in ambient temperatures up to approximately +75°F (+24°C).

Make sure the voltage of the power source meets the specified voltage, ±10%.

The pump connections are located at the rear of the pump box and are labelled and . These

connections are angled upward so the recirculating fluid will drain back into the reservoir when the hoses are disconnected. Both connections are capped with stainless steel serrated plugs.

The pump lines have ¼" MPT for mating with standard plumbing fittings. For your convenience stainless steel adapters, ¼" FPT to 3/8" O.D. serrated fitting, are provided.

The bath work area has a high and low level marker to guide filling. The markers are 1 inch horizontal slits located in the center of the stainless steel baffle separating the work area and the pump assembly. The correct fluid level falls between these two markers. The unit will not start if the fluid level is below the lower slit.

Operation

Before starting the unit, double-check all electrical and plumbing connections. Make sure the bath is properly filled with fluid.

To start the unit, press . To turn the unit off

press

The illuminates to indicate the heater is on.

The LED indicates the status of the refrigeration system. It illuminates to indicate the refrigera-

tion system is removing heat from the cooling fluid.

Temperature Adjustment

To display the temperature setpoint, press on the controller. The indicator will illuminate and

the display will flash the current setpoint value. To adjust the temperature setpoint, press the arrow buttons until the desired temperature setpoint is

indicated. Press again to confirm the change. The display will rapidly flash the new value for a

short time and then return to the recirculating fluid temperature.

Periodic Maintenance

Periodically inspect the reservoir fluid. If cleaning is necessary, flush the reservoir with a cleaning fluid compatible with your application.

The reservoir fluid should be replaced periodically. Frequency depends on the operating environment and amount of usage.

Before changing the reservoir fluid ensure it is at a safe handling temperature.

Periodic vacuuming of the condenser fins is necessary. The frequency of cleaning depends on the operating environment. We recommend a monthly visual inspection of the condenser after initial installation. After several months, the cleaning frequency will be established.

again.

LED indicates the status of the heater. It

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Description

General Information

The NESLAB RTE Refrigerated Bath/Circulators are designed to provide temperature control for applications requiring a fluid work area or pumping to an external system. Units consist of a non-CFC air-cooled refrigeration system, circulation

pump, seamless stainless steel bath, work area cover, and a microprocessor temperature controller.

Specifications

Temperature Range

Temperature Stability

Cooling Capacity

RTE 7 RTE 10 RTE 17 RTE 740

-25°C to +150°C -22°C to +150°C -40°C to +200°C ±0.01°C

1100

1000

900 800

700 600 500 400 300

Heat Removal (Watts)

200 100

-40-30-20-10 0 10 20 30 40 5060 70 80 90100

A=115/60 RTE-740 units B=230/50 RTE-740 units C=RTE-7, 10, 17

Temperature °C

Pump Capacity

Meters Feet

4.9 16

3.7 12

r P

2.4 8

1.2 4

0.8 1.6 2.4 3.2 4.0 Gpm 3691215Lpm

Flow

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Time to Temperature

115V/60 Hz units

General Information

230V/50 Hz units

RTE-740 units

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Heater (Watts)

115V/60 Hz Models 230V/50 Hz Models

100V/50-60Hz Models

Refrigerant

RTE 7 RTE 10 RTE 17 RTE 740

800 1600 800

2000 2000 2000

800 1200 800

R134a (6 ounces)

R404a (8 ounces)

General Information

Bath Work Area

(W x L x D)

Inches

Centimeters

Bath Volume

Gallons

Liters

Air Flow Requirements

SCFM

Weight

Pounds

Kilograms

65/8 x 7¼ x 6

16.8 x 18.3 x 15.2

1.9

7.2

8¾x 9 3/8 x 6

22.4 x 23.9 x 15.2

2.6

9.8

8¾ x 9 3/8 x 9

22.4 x 23.9 x 22.9

4.5

17.0

65/8 x 7¼ x 6

16.8 x 18.3 x 15.2

1.9

7.2

200170

27.2

1. Specifications subject to change.

2. Baths are tested at temperatures below freezing with denatured alcohol. This fluid is HIGHLY flammable and is not recommended by Thermo. Above 80°C, baths are tested at with silicone oil. This fluid is known to release a formaldehyde vapor (which is carcinogenic) above 150°C.

3. 20°C ambient. 20°C bath temperature using water. Sea level. Measured at the center of the work area, work cover on, no external flow, stable ambient, full refrigeration (RTE-740 in Energy Saving Mode). For some applications, agitation and stability above ambient may be improved by connecting a small length of hose between the pump connections on the rear of the unit.

4. 20°C ambient. 20°C bath temperature using water. Pump fully loaded. Sea level.

5. See next page for unit dimensions.

6. Add approximately 3 pounds (1.4 kilograms) for shipping weight.

30.8

32.2

39.5

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Unitl Dimensions (inches)

General Information

30°

3¼

15/8

Rear View Side View

Unit Dimensions

105°

17/8

1½

RTE 7 RTE 10 RTE 17 RTE 740

Dimension A

Dimension B

Dimension C

Dimension D

Dimension E

Crate Dimensions (D x W x H)

23 5/8 23 5/8 26 5/8 26 5/8

9 1/4 11 3/8 11 3/8 11 3/8

19 20 1/8 20 1/8 20 1/8

17 3/8 17 3/8 20 3/8 20 3/8

10 5/8 10 5/8 10 5/8 12 3/8

26½ x 18 x 33½

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Page 12

Site

Section III Installation and Operation

Locate the unit on a sturdy work area. Ambient temperatures should be inside the range of +50°F to +104°F (+10°C to +40°C). The maximum operating relative humidity is 80%.

Never place the unit in a location where excessive heat, moisture, or corrosive materials are present.

The unit has an air-cooled refrigeration system. Air is drawn through the front panel and discharged through the rear panel. The unit must be positioned so the air intake and discharge are not impeded. A minimum clearance of 12 inches (30 centimeters) at the front and rear of the unit is necessary for adequate ventilation. Inadequate ventilation will reduce cooling capacity and, in extreme cases, can cause compressor failure.

Excessively dusty areas should be avoided and a periodic cleaning schedule should be instituted (see Section IV, Condenser Cleaning).

Using 20°C water as a bath fluid, 115/60 units will retain their full rated capacity in ambient temperatures up to +20°C. Reduce the cooling capacity approxi- mately 15 watts for every 1°C above +20°C, to a maximum ambient temperature of +40°C. For 230/50 units, reduce the cooling capacity approximately 18 watts for every 1°C. Lower reductions in cooling capacity occur as the bath fluid temperature increases.

Installation and Operation

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Page 13

Electrical

Requirements

Installation and Operation

The unit construction provides protection against the risk of electrical shock by grounding appropriate metal parts. The protection may not function unless the power cord is connected to a properly grounded outlet. It is the user's responsibility to assure a proper ground connection is provided.

We recommend the use of a dedicated outlet.

Refer to the serial number label on the rear of the unit to identify the specific electrical requirements of your unit. Ensure the voltage of the power source meets the specified voltage, ±10%.

The RTE-7 is not designed to be used beyond the voltage range or have momentary power interruptions. Install an “un-interruptible power supply” or a line loss detection method.

All units are:

Pollution Category 2

Overcurrent Protection II

The following power options are available:

Unit Amps

Breaker Power Inlet

RTE 7 115/60/1 12 15A IEC 320-C-13

100/50-60/1 12 15A IEC 320-C-13

230/50/1 12 15A IEC 320-C-19

RTE 10 115/60/1 12 15A IEC 320-C-13

100/50-60/1 12 15A IEC 320-C-13

230/50/1 12 15A IEC 320-C-19

RTE 17 115/60/1 16 20A IEC 320-C-19

100/50-60/1 16 20A IEC 320-C-19

230/50/1 12 15A IEC 320-C-19

RTE 740 115/60/1 16 20A IEC 320-C-19

100/50-60/1 16 20A IEC 320-C-19

230/50/1 12 15A IEC 320-C-19

1. Average Amp draw.

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Page 14

Unit Type

115/60/1 15 NEMA 5-15 115/60/1 20 NEMA 5-20

Amperage Plug Type

100/50-60/1 15 NEMA 5-15 100/50-60/1 20 NEMA 5-20 230/50/1 All Country Specific

1. Power cord length, if supplied, is 2 meters.

Power Cord Set

230 Volt, 50 Hertz units do not come with a power cord set. To select the proper power cord, follow these guidelines:

The cord set must consist of a plug, cable and receptacle. If the unit is rated greater than 12 Amps, use a cord set rated for 20A. If the unit is rated less than 12 Amps, use a cord set rated for 15A. The cord set must be approved by local electrical authority or other

acceptable agency.

Ensure the plug is compatible with your local outlets and receptacles.

Installation and Operation

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Page 15

Plumbing Requirements

Ensure the unit is off before connecting tubing to the unit.

To prevent damage to the plumbing lines, always support the fittings while installing/removing the pumping caps and lines.

Hose Connections

The pump connections are located at the rear of the pump box and are labelled

(pump outlet) and (pump inlet). These connections are bent upward

so the recirculating fluid will drain back into the reservoir when the hoses are disconnected. Both connections are capped with stainless steel serrated plugs.

The pump lines have ¼" MPT for mating with standard plumbing fittings. For your convenience stainless steel adapters, ¼" FPT to

/8" O.D. serrated fitting, are provided. (To assure proper fit, they should be installed using 1½ turns of Teflon® tape around the threads.)

Installation and Operation

Drain

Make sure all tubing connections are securely clamped. Avoid running tubing near radiators, hot water pipes, etc. If substantial lengths of tubing are necessary, insulation may be required to prevent loss of cooling capacity. Tubing and insulation are available from Thermo. Contact our Sales Department for more information (see Preface, After-sale Support).

It is important to keep the distance between the unit and the external system as short as possible, and to use the largest diameter tubing practical. Tubing should be straight and without bends. If diameter reductions must be made, make them at the inlet and outlet of the external system, not at the unit.

If substantial lengths of cooling lines are required, they should be pre-filled with bath fluid before connecting them to the unit. This will ensure that an adequate amount of fluid will be in the bath once it is in operation.

Ensure the bath fluid is at a safe handling temperature before draining the unit.

The unit is equipped with a drain located at the back of the unit labelled . To drain the reservoir attach a hose to the barb and loosen the fitting.

The fitting has a stop to prevent it from coming off.

Pumping

The pump is designed to deliver a flow of 15 liters per minute (4 gallons per minute) at 0 feet head. To prevent external circulation, the pump inlet and outlet lines on the rear of the unit are capped. The caps must be removed when external circulation is required.

To properly secure external hose connections to the unit, wrap Teflon® tape around the pipe line threads before installation. Once the hose connections are made, the hoses must be properly plumbed to an external system. It is

important the bath is not in operation until all plumbing is complete.

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Page 16

Circulating to an open container

Outlet

Inlet

Levelling Device

Installation and Operation

Bath (Rear View)

Open Container

A stainless steel leveling device is available to aid circulation to an open vessel. Contact our Sales Department for more information (see Preface).

Support the leveling device over the open container with a ringstand. Stagger the tubes in the leveling device so one tube is submerged in the vessel fluid, and the other tube is level with the fluid surface. Connect the deeper tube to the pump outlet and the shorter tube to the pump inlet.

Adjust the flow rate using the accessory flow control valve connected to the pump outlet, or by partially restricting the outlet tubing. When properly adjusted, the pump inlet will draw an occasional air bubble to prevent over flow, and the pump outlet will force fluid through the submerged tube to prevent aeration of the vessel.

To avoid siphoning the bath work area when the unit is shut off, lift the leveling device out of the vessel and above the level of the unit.

Circulating through two closed-loops

Pump Box

Bath

Work Area

Bath (Top View)

System #1

System #2

The pump can be used to circulate through two closed-loop systems. Connect the shortest practical length of flexible tubing from the pump outlet to the inlet of external system #1. Connect the outlet of system #1 directly into the bath work area. Connect tubing from the bath work area to the inlet of system #2. Connect the outlet of system #2 to the pump inlet.

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Page 17

Fluids

Installation and Operation

The user is always responsible for the fluid used. Never use flammable or corrosive fluids with this unit. The use of chlorine or sodium hypochlorite in the baths will cause pitting that could leave to failure of the refrigeration system.

Handling and disposal of liquids other than water should be done in accordance with the fluid manufacturers specification and/or the MSDS for the fluid used.

For fluid selection consider application requirements, operating temperature range, material compatibility, safety concerns, and environmental issues.

Wetted materials of bath include; 316 and 304 Stainless steels, Ryton® (PPS),

Teflon

Deionized (up to 18 Meg-ohm/cm) and distilled water are recommended to control corrosion and algae bloom. See Water Quality Standards and Recommendation in Appendix A.

(PTFE) and Ethlyene-Propylene rubber (EPDM).

Filling

Requirements

Ethylene glycol, propylene glycol, silicone oil, and filtered water are acceptable fluids.

NOTE: Kinematic viscosity of the selected fluid should not exceed 50 centistokes at the lowest operating temperature.

Please call Thermo customer service to discuss high and low temperature fluid selections. However, we will often refer you to chemical companies specializing in heat transfer fluids.

Ensure the drain on the back of the unit is closed before filling the unit.

NOTE: The unit is equipped with a reservoir level float switch. The switch prevents the unit from starting if the fluid is below the lower slit.

When pumping to an external system, keep extra fluid on hand to maintain the proper level in both the circulating lines and the external system.

Avoid overfilling, fluids expand when heated.

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Page 18

Controller

(Digital One/Digital Plus)

The controller controls temperature using a Proportional-Integral-Derivative (PID) algorithm. It is designed with self-diagnostic features and easy to use operator interface. Two controller options are available: Digital One and Digital Plus. The information on the following two pages applies to both controllers.

Installation and Operation

Digital One Controller

Yes

ON/OFF. Use this key to toggle the unit on or off and to clear error mes- sages.

SCROLL. Use this key

to scroll through the controller's LEDs. It is also

used to save new changes.

YES/ARROW. Use this key to increment numerical values when setting values and to accept new settings.

NO/ARROW. Use this key to decrement numerical values when setting values and to abort new settings.

Indicates refrigeration system status. It illuminates to indicate the refrigeration system is removing heat from the bath fluid. The indicator is off when heat is not being removed.

Indicates heater status. It illuminates to indicate the heater is adding heat from the bath fluid. The indicator is off when heat is not being added.

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Page 19

Installation and Operation

NOTE: The following indications are not visible until is depressed.

Setpoint. Indicates the controller is displaying the current setpoint.

Low Temperature Alarm. Indicates the controller is displaying the current

low temperature alarm.

High Temperature Alarm. Indicates the controller is displaying the current high temperature alarm.

To adjust the displayed value use the arrow buttons. Pressing an arrow button will cause the display to stop flashing and to indicate the new setpoint value. Save the change by pressing SCROLL. The new setpoint value will rapidly flash for two cycles and then the controller will return to the reservoir fluid temperature display.

If SCROLL is not pressed within 60 seconds the change will time out and revert to the original setpoint. The controller will automatically return to the reservoir fluid temperature display.

NOTE: You can not adjust the setpoint closer than 0.1°C of either temperature limit, and you can not adjust either temperature limit within 0.1°C of the setpoint. Trying to do so will cause the indicator to flash and, on Digital Plus controllers, the alarm to beep.

On units with the Digital Plus controller, pressing the Mute button prior to pressing SCROLL will abort any changes and return to the reservoir fluid temperature display.

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Page 20

Start Up/Shut Down (Digital One/Digital Plus)

Installation and Operation

Controller

Pre-Start

Starting

Full Range Cooling

Setpoint

Before starting the unit, recheck all electrical and plumbing connections.

Ensure the bath reservoir is properly filled. The unit will not start if the reservoir fluid level is below the lower horizontal slit.

The unit can be configured for automatic restart. If the unit shuts down as a result of a losing power, once power is restored the unit will restart. See Setup/Tuning Loop on page 21 to enable this feature.

Press Digital Plus units momentarily sound the alarm), then quickly displays the

setpoint before displaying the reservoir fluid temperature. The pump starts and, after a 30 second delay, the refrigeration comes on. The RTE-740 refrigeration system is designed to start with the pump.

NOTE: If the unit's recirculating fluid is outside either temperature limit, the unit will start but the appropriate indicator will flash until the fluid is within the limit.

If refrigeration is needed for operation above 50°C, turn on the Full Range Cooling Mode. See Setup/Tuning Loop on page 21 to enable this feature.

To display/change the setpoint press until illuminates. The display

. The controller does a self-test (sequences through the LEDs, and

will flash the current setpoint value. Use the arrow buttons to change the value. The controller will not allow you to enter a setpoint closer than 0.1°C of either temperature alarm setting, see next page. Attempting to causes the indicator to flash and, on Digital Plus controllers, sounds the alarm.

Once an arrow button is depressed starts to flash. If an arrow button is not pressed within 10 seconds the display will return to the reservoir temperature.

On units with the Digital Plus controller, pressing Mute prior to pressing SCROLL will abort any change and return you to the fluid temperature display.

Once the desired setpoint is displayed, press again to confirm the change. The display will rapidly flash the new value twice and then return to the

recirculating fluid temperature. If the new value is not confirmed within 60 seconds the display will return to the fluid temperature and ignore any change.

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Page 21

Low Temp Alarm

To display/change the low temperature alarm setting press until illuminates. The display will flash the current limit value. Use the arrow buttons

to change the value. You can not set the alarm closer than 0.1°C below the setpoint. Attempting to causes the indicator to flash and, on Digital Plus controllers, sounds the alarm.

On units with the Digital Plus controller, pressing Mute prior to pressing SCROLL will abort any change and return you to the fluid temperature display.

Once an arrow button is depressed starts to flash. If an arrow button is not pressed within 10 seconds the display will return to the current reservoir

temperature.

Installation and Operation

High Temp Alarm

Once the desired setting is displayed, press again to confirm the change. The display will rapidly flash the new value twice and then return to the recircu-

lating fluid temperature. If the new value is not confirmed within 60 seconds the display will return to the fluid temperature and ignore any change.

To display/change the high temperature alarm setting press

until

illuminates. The display will flash the current setting value. Use an the arrow buttons to change the value. You can not set the alarm closer than 0.1°C above the setpoint. Attempting to causes the indicator to flash and, on Digital Plus controllers, sounds the alarm.

On units with the Digital Plus controller, pressing Mute prior to pressing SCROLL will abort any change and return you to the fluid temperature display.

Once an arrow button is depressed starts to flash. If an arrow button is not pressed within 10 seconds the display will return to the current reservoir

temperature.

Once the desired limit is displayed, press again to confirm the change.

Stopping

The display will rapidly flash the new value twice and then return to the recirculating fluid temperature. If the new value is not confirmed within 60 seconds the display will return to the fluid temperature and ignore any change.

To turn the unit off, press . The pump will stop and the refrigeration will shut down. NOTE: The RTE-740 refrigeration system is designed to shut down

thirty seconds after the pump.

Thermo recommends waiting a minute before restarting the unit.

- 20 -

Page 22

Setup/Tuning Loop

(Digital One/Digital Plus)

HOLD

XX.X

The Setup/Tuning Loop is used to tune the controller's PID parameters (CooL HEAt); enable/disable auto restart (AStrt); determine how the unit will react when a fault occurs (FAUlt) — either shut down (on) or continue to run (oFF); to configure the temperature display to indicate to a tenth or a hundredth of a degree (rES); and to enable/disable full range cooling (FrC) and energy saving (ESAuE) modes.

Installation and Operation

NOTE: For RTE-7, 10, and 17 units the COOL PID display only appears if the Energy Saving mode is enabled, see below.

CooL

tunE

CooL

HEAt

AStrt

FAULt

rES

Yes

To enter the loop you must be displaying the reservoir fluid temperature, press and hold and then press . The display will indicate tunE. Use the arrow keys to sequence through the loop and to change a display. Use

to confirm any changes.

Thermo recommends that only a qualified technician change PID parameters. Incorrect PID values will hamper unit performance. See page 40 for factory preset PID values.

Yes

AStrt

oFF

FAULt

oFF

0.1

rES

0.01

Yes

Factory preset = off

Yes

Factory preset = off

Yes

Factory preset = 0.1

RTE-7, 10, 17 only

FrC

ESAuE

StorE

Accept Changes

Yes

All

Changes made in the Tuning/Setup Loop take affect when the StorE prompt. Pressing No at the prompt aborts all changes.

- 21 -

Yes

Factory preset = off

Yes

Factory preset = off

Full range cooling mode allows the refrigeration to operate throughout the entire temperature range. If off, refrigeration is available only below 50°C.

The Energy Saving mode is primarily designed for applications running under a stable load. Enabling the mode saves energy by reducing the unit’s heater power requirements. This can result in substantial energy savings over the life of the unit.

Yes

is pressed at

Page 23

Controller

(Digital Plus Only)

Mute

Sensor

Installation and Operation

Alarm. If the alarm sounds, use this button to toggle the alarm off and on. If

the cause of the alarm is cleared but then reoccurs, the alarm will sound again.

The button is also used to abort changes to the setpoint and temperature alarms. It is also used to abort changes when configuring the unit for external probe, serial communication, timer operation, or offset mode.

NOTE: Pressing and holding any of the following buttons for five seconds takes you to their calibration or setup loop.

External Probe. Pressing the Sensor button displays the external probe temperature and lights the LED indicating that the bath is monitoring and controlling to this temperature. The unit will continue to monitor the internal bath temperature to ensure the bath is running in a safe operating mode.

NOTE: If there is no sensor attached (or the circuit is open), or serial communications is enabled, the button will flash, and the alarm will beep three times. The display will momentarily show an error message and then return to the reservoir fluid temperature.

Computer

NOTE: The temperature display may drift for up to 10-15 seconds when transitioning between temperature sensors. This is normal operation.

Serial Communication. Pressing Computer enables/disables the serial communications mode of operation. In this mode all changes to the setpoint, alarm limits, etc. must now be sent by a remote device using RS-232 or RS-485 protocols. You can still view all settings locally but cannot alter them.

Once enabled, the Computer LED will flash when sending and receiving signals. See Appendix B for additional information.

You can also turn the unit off by pressing but the unit will remain in the serial communication mode. To restart, send another start command.

NOTE: If the unit is shut down in the serial communication mode and you need to start the unit using the local controller, simultaneously depress and hold both arrow keys for approximately 10 seconds. The display will then show the

internal probe temperature, and the alarm will sound. Press the

Computer

LED

and turn off the LED and disable serial communications. Turn the controller off using . You can now start and operate the unit with the keypad.

- 22 -

Page 24

Timer

Timer. Pressing the Timer button enables/disables the Timer function of the bath. You can define the current time, a turn-on time, and a turn-off time.

To setup the bath for timer operation see Timer Setup Loop on page 25.

Offset

If the bath is turned off using with the timer mode enabled, the Timer LED

Installation and Operation

will go out and the timer mode will be disabled. With the bath off, you have to press the Timer button to enable the timer mode and light the LED.

NOTE: Enabling serial communications; time-on not defined; time-off not defined; or clock not set, causes an error condition and disables the TIMER mode. In this case the button will flash, the unit will beep three times, and the display will momentarily show an error message.

If a power disruption occurs, the timer mode is disabled. The Timer Setup Loop will have to be used to restore the settings.

Temperature Offset Mode. Pressing the Offset button, with the bath on, enable/disables the temperature offset mode. This mode changes the temperature displayed on the bath a user defined amount. The LED will be lit when this mode is enabled indicating that the temperature displayed is an offset value. NOTE: The temperature offset only affects the displayed value when the offset mode is enabled, the other setpoint values still dictate unit performance.

To setup the bath for offset mode operation see Offset Setup Loop on page 26. If you press the Offset button when an offset is 0 or not defined, or if serial communications is enabled, the button will flash, the unit will beep three times, and the display will momentarily show an error message (Er53 for offset undefined, Er54 for serial comm on). In either case the function can not be enabled.

NOTE: Use this feature only when the bath is at a stable temperature.

In either local or Computer mode with offset disabled, the unit controls to and displays the calibrated value for the internal or external probe, whichever is selected.

In either local or Computer mode with offset enabled, the unit still controls to the calibrated value, not the offset value, for the internal or external probe. The display shows the calibrated value with the offset value added.

In Computer mode if you send a signal to the bath to display internal or external probe temperatures, the calibrated value is returned. If you send a signal to change the display value the offset value is returned.

- 23 -

Page 25

Computer Setup Loop

(Digital Plus Only)

NOTE: The Computer Setup Loop is not available if the serial communications

mode is enabled. Review/change the settings before entering the mode.

Computer

Installation and Operation

XX.X

The Computer Setup Loop is used to set the serial communications protocol parameters. With the bath on, press and hold the Computer button for five seconds. The controller will display SErL. Press the arrow buttons to toggle between 232 and 485. Press the Computer button to hold the protocol and advance you through the loop to adjust the remaining parameters. Press the arrow buttons to adjust any parameter. When StorE is displayed press YES to accept any new values, NO to abort them.

If the Computer button is not pressed for 60 seconds the function will time-out and the changes will not be saved. Pressing the Mute button will also exit the Computer Setup Loop and return you to the reservoir fluid temperature display.

Once enabled, the Computer LED will flash when sending and receiving signals. See Appendix B for additional serial communication information.

Hold for 5 seconds

SErL

Computer

232

485

A In

Factory preset = RS232

Yes

A In = Analog In, Optional

See page 27.

Computer

19200

9600

bAud

Computer

Addr

Computer

StorE

Yes

ccept All Changes

4800 2400 1200

600 300

1 to 100

Factory preset = 19200

Yes

Factory preset = 1 (RS-485 only)

- 24 -

Page 26

Timer Setup Loop

(Digital Plus Only)

Timer

To set the timer, with the bath on, press and hold the Timer button for five seconds to access the controller's Timer Setup Loop. The display will indicate diSP. Use the arrow buttons to select the desired clock display. Press the Timer button and the controller will display cloc. Use the arrow buttons to display the correct time.

Press the Timer button and the controller will display t-On. Press the arrow buttons to set the desired turn-on time. Press the Timer button and the controller will display t-OFF. Press the arrow buttons to set the desired turn-off time. Pressing the Timer button after entering the clock time will display StorE. Press YES to accept the values, NO to abort them.

If the Timer button is not pressed for 60 seconds the function will time-out and the changes will not be saved. Pressing the Mute will also exit the Timer Setup Loop and return you to the temperature display.

If the bath is turned off using with the timer mode enabled, the Timer LED will go out and the timer mode will be disabled. With the bath off, you have to

press the Timer button to enable the timer mode and light the LED.

NOTE: Enabling serial communications disables the

TIMER mode. If an error condition exists: serial communications enabled; time-on not defined; timeoff not defined; or clock not set, the unit will beep and will not enable the function. The display will then

indicate the reservoir fluid temperature. If a power disruption occurs, the timer mode is

disabled. The Timer Setup Loop will have to be used to restore the settings.

Installation and Operation

- 25 -

Page 27

Offset Setup Loop

(Digital Plus Only)

NOTE: Use this feature only when the bath is at a stable temperature.

Press the Offset button to display the current offset temperature value and illuminate the LED.

Offset

Installation and Operation

To change the value press and hold the Offset button for five seconds to enter the controller's Offset Setup Loop. The bath will alternately flash oFSEt with the current temperature.

Use the arrow buttons to change the value. For example, if the bath is at +40°C and the desired offset is +5°C, change the display to +45°C. Press the Offset button once the desired offset is displayed. (If the Offset button is not pressed the function will time-out and the change will not be saved.) The display will show StorE. Press YES to accept the value, NO to abort it.

If, after pressing YES, the display returns to +40°C, not +45°C, the Offset button was not depressed when you entered the Offset Setup Loop. Press the Offset button to display the offset temperature and illuminate the LED.

XX.X

Offset

OFSEt

Offset

Hold for 5 seconds

xxx.x

Yes

StorE

Yes

ccept All Changes

NOTE: Offset only changes the display of the enabled probe. Setpoint and alarm values will display the non-offset value.

If you press the Offset button when an offset is 0 or not defined, or if serial communications is enabled, the button will flash, the unit will beep three times, and the display will momentarily show an error message (Er53 for offset undefined, Er54 for serial comm on). In either case the function can not be enabled.

With offset disabled, the unit controls to and displays the calibrated value for the internal or external probe, whichever is selected.

With offset enabled, the unit still controls to the calibrated value, not the offset value, for the internal or external probe. The display shows the calibrated value with the offset value added.

- 26 -

Page 28

Analog Port - Optional (Digital Plus Only)

A I/O Analog Port

The 15-pin female receptacle located on the rear of the controller is used for optional analog interface.

The analog signal is setup using the unit's Computer Setup Loop. With the bath on, press and hold the Computer button for five seconds. The controller will display SErL. If needed, press the arrow buttons to toggle between 232,

485, and A In. With A In displayed, press the Computer button again until StorE is displayed, press YES. Use the Computer button to enable/disable the analog signal. The button will flash when A in is enabled.

Contact Ratings, Pins 1, 2, and 3

Maximum Voltage = 30 V AC/DC Maximum Current = 1 Amps @ 30 V Minimum permissible load 10uA, 10mVDC

Pin # Function

1 Status relay NO. Status relay pins 1 and 3 close on start up, and open

on stop and all errors.

Installation and Operation

2 Status relay NC. Status relay pins 2 and 3 open on start up, and close

on stop and all errors.

8 7 6 5 4 3 2 1

15 14 13 12 11 10 9

3 Status relay common 4- 5 Not used 6 Analog Ground. The analog ground is physically separated from the

power ground throughout the unit. To prevent offsets that result from ground currents, the analog and power grounds are only connected at the unit's power supply. Analog ground should only be used as a

reference pin.

7 Temp out. The fluid temperature, as measured by the enabled sensor,

can be read at this pin. The temperature scale is 10mV/°C, referenced

to analog ground, pin 6 (example: +150mV = +15.0°C). 8 Not used 9 Digital output ground, reference for pin 14. Digital output ground should

only be used as a reference pin. 10-13 Not used 14 Digital output +5VDC at 15mA max. 70mA max inrush current. This

power supply energizes on start up and de-energizes on stop and all

errors. 15 Setpoint in. The temperature setpoint can be controlled by applying a

known voltage to this pin. The temperature scale is 10mV/°C, refer-

enced to analog ground, pin 6 (example: +230mV = +23.0°C).

The analog output requires calibration, see page 36.

- 27 -

Page 29

High Temperature Cutouts (Digital One/Digital Plus)

Adjustable High Temperature Cutout

To protect your application, the adjustable High Temperature Cutout ensures the heater will not exceed temperatures that can cause serious damage to your unit. A single temperature sensor is located in the bath fluid. A High Temperature fault occurs when the temperature of the sensor exceeds the set temperature limit. The safety has a range of 0°C to 230±20°C.

In the event of a fault the unit will shut down and the controller will display HtC. The cause of the fault must be identified and corrected before the unit can be manually restarted.

The cutout is not preset and must be adjusted during initial installation. To set the cutout, locate the small black adjustment dial on the rear of the controller. Turn the dial fully clockwise and turn the power switch off then back on.

Installation and Operation

Start the unit. Adjust the setpoint for a few degrees higher than the highest desired fluid temperature and allow the bath to stabilize at the temperature setpoint. Turn the dial counterclockwise until you hear a click and the unit shuts down.

Before you can restart the bath it has to cool down a few degrees. Then, without moving the adjustment dial, turn the power switch off then back on.

NOTE: We recommend rechecking operation if the unit is moved.

High Temperature Cutout

N2 Nitrogen Purge

Non-Adjustable High Temperature Cutout

For added safety, the unit also has a non-adjustable High Temperature Cutout. With fluid in the bath, it is set to trip at 225°C ±8°C.

If the bath is empty, the cutout has a typical trip point of 300°C. The heater temperature can continue to rise after the cutout trips up to approximately 314°C.

There will be no indication the High Temperature Cutout activated other than an audible click. The unit will continue to run but the heater will no longer operate. Service will be required.

- 28 -

Page 30

Nitrogen Purge (Digital One/Digital Plus)

Units are equipped with nitrogen purge line designed to accept a constant flow of dry nitrogen into the reservoir. The nitrogen blankets the cooling fluid reducing fluid evaporation.

Connect your nitrogen line to the N2 1/8" OD tube on the rear of the unit.

Accessories (Digital One/Digital Plus)

Autorefill Control Cable Attachment

Installation and Operation

Autorefill Accessory

The autorefill accessory attaches to the rear of the bath. The autorefill provides makeup water to replace bath fluid lost to evaporation, etc. It will require a tap water source. A reservoir level float switch and logic/signal are already installed in the bath.

When tap water is available, the bath is turned on, and the fluid reaches the lower 1 inch horizontal level indicator located in the reservoir the autorefill begins filling the bath. The autorefill shuts off when the fluid reaches the upper indicator, or if the bath is turned off.

Cap Tube

Tap Water Inlet

Autorefill Module

Power Supply Inlet

Description Part Number

100-115V/50/60Hz 611012000001 200-240V/50/60Hz, No line cord 611028000001

NOTE: Power the Autorefill Accessory with an AC Adapter that is UL Listed with the following ratings:

- Class 2

- Input rated 100-240 VAC, 47-63 Hz, 0.4A

- Output rated 12VDC, 1.25A Max.

- 29 -

Page 31

Reservoir Overflow Device

The overflow device is designed to act as an automatic drain for the unit's reservoir. The assembly is stainless steel with the exception of the drain fitting which is Ryton®. The unit can still be drained as normal, but if the level reaches the middle of the tee it will begin to overflow out the bent tube.

•Drain the unit's reservoir.

•Remove and discard the stop screw from the bottom of the unit's drain housing.

•Remove the unit's drain fitting.

Installation and Operation

•Thread the overflow assembly into the drain

Vertical Tube

housing. (You can remove the vertical tube assembly from the Swagelok® fitting if there is a clearance issue.)

•After threading the overflow assembly in as far as it goes, loosen it back out until the Swagelok® fitting is at the top.

•Install one of the two supplied 4-40 x

Drain Fitting (Install finger tight)

Swagelok® Fitting

Drain Housing

¼” phillips head screws into the bottom of the drain housing where the stop screw use to be. (Make sure this

screw is tight so that the assembly

Overflow Assembly

doesn’t turn and drain the tank.)

•Reinstall the vertical tube assembly into the Swagelok® if it was removed.

•Install the drain fitting into the end of the new assembly - finger tight.

•Install the other supplied 4-40 x ¼"phillips head screw into the bottom of the overflow assembly. (This prevents the drain fitting from falling off the unit.)

Description Part Number

RTE 7 and RTE 10 overflow device 126000000044

RTE 17 overflow device 126000000045

RTE 740 overflow device 126000000049

- 30 -

Page 32

The following accessories are also available from Thermo:

Stainless Steel Test Tube Racks Uni t Test Tubes (maximum) Size (mm) Part Number

RTE 7 49 13 126000000040 RTE 7 25 18 126000000041 RTE 10 72 13 126000000042 RTE 10 42 18 126000000043 RTE 17 72 13 126000000042 RTE 17 42 18 126000000043 RTE 740 49 13 126000000040 RTE 740 25 18 126000000041

External Sensors (Digital Plus only) Description Part Number

6"L X .187"DIA, 6' Lead, Stainless Steel probe 058520 18"L X .187"DIA, 6' Lead, Stainless Steel probe 058521

1.5"L X .187"DIA, 6' Lead, Stainless Steel probe 058522

1.5"L X .062"DIA, 6' Lead, Stainless Steel probe 058523 6"L X .187"DIA, 6' Lead, Teflon® probe 058524 6"L X .187"DIA, 15' Lead, Stainless Steel probe 126000000025 6"L X .187"DIA, 20' Lead, Stainless Steel probe 126000000029 6"L X .187"DIA, 30' Lead, Stainless Steel probe 126000000024

1.5"L X .187"DIA, 30' Lead, Stainless Steel probe 126000000033

GFCI* Breaker Line Cords (115V 60Hz units only)

Installation and Operation

Unit Description Part Number

15 Amp Units 125V/15A 4-6MA 126000000050 20 Amp Units 125V/20A 4-6MA 126000000051

RS-232/485 Communication Cables (Digital Plus only)

Description Part Number

10' Cable Assembly 083258

*Ground Fault Current Interrupter. An electrical safety device which opens a circuit upon observation of electricity leaking to ground through an undefined path, most likely a human being. GFCI receptacles are required by the NEC in many locations.

- 31 -

Page 33

Accessories

(Digital Plus Only)

RPC Remote Box

An RPC can control the bath from a remote location. It mirrors the controller displays; and has the ability to store and run up to 16 programs. It operates by sending and receiving information by RS-485 serial communication. It attaches to the unit by an RS-485 cable with 9-pin D subminature connectors.

The remote can be mounted to the wall with an included wall bracket, or it can be used on a desk top with the wall bracket removed.

Installation and Operation

HEAT

COOL

BATH ON

120.0°C

Typical RPC Display

SETPOINT

Description Part Number

RPC 100-115V/50/60Hz/1Ø 604012000401 (with NEMA 5-15P type plug)

RPC 100-240V/50/60Hz/1Ø 604028000401 (requires country specific line cord, not included)

10' Cable Assembly (included) 083258 25' Cable Assembly 426000000029 50' Cable Assembly 426000000030 75' Cable Assembly 426000000031 100' Cable Assembly 426000000032 200' Cable Assembly 426000000033

NOTE: Power the RPC with an AC Adapter that is UL Listed with the following ratings:

- Class 2

- Input rated 100-240 VAC, 47-63 Hz, 0.4A

- Output rated 12VDC, 1.25A Max.

- 32 -

Page 34

Service Contracts

Reservoir Fluid

Section IV Basic Maintenance

To avoid electrical shock, disconnect the mains cord prior to removing any access panels or covers.

Thermo offers on-site Service Contracts designed to provide extended life and minimal down-time for your unit. For more information, contact our Service Department (see Preface, After-sale Support).

Periodically inspect the reservoir fluid. If cleaning is necessary, flush the reservoir with a cleaning fluid compatible with your application.

The reservoir fluid should be replaced periodically. Frequency depends on the operating environment and time of usage.

Before changing the cooling fluid ensure it is at a safe handling temperature.

Reservoir Cleaning

Algae

Condenser Cleaning

Routine cleaning can be achieved by simply sponging down the seamless

Maintenance

stainless steel tank with tap water. (Dish washing detergent may be used but the tank must be thoroughly rinsed.)

To restrict the growth of algae in the bath, we recommend that all circulation lines be opaque. This will eliminate the entrance of light required for the growth of most common algae.

We recommend the use of Chloramine-T, 1 gram per 3½ liters.

For proper operation, the unit needs to pull substantial amounts of air through a condenser. A build up of dust or debris on the fins of the condenser will lead to a loss of cooling capacity.

Periodic vacuuming of the condenser is necessary. To access the condenser the front grille must be removed.

The unit must be turned off before the front panel is removed.

All units have a one-piece condenser grille assembly held on by spring clips. Carefully pull forward on the bottom of the panel to remove it.

The cleaning frequency depends on the operating environment. After initial installation, we recommend a monthly visual inspection of the condenser. After several months, the cleaning frequency will be established.

- 33 -

Page 35

Internal Temperature

Sensor (rdt1)

Calibration

Press and Hold

X.X

Yes

Should the bath fluid temperature display disagree with your calibrated reference thermometer, the internal temperature sensor (rtd1) may need calibration.

Do not pick calibration points that are outside the safe operating limits of the fluid in your application. For example with water, 90°C and 5°C would be typical calibration points.

Maintenance

CAL

Yes

rtd1

rdt3

A in

Release

NOTE: If it is more convenient, the low-end calibration can be performed before doing the high-end.

Yes

rtd3 is used to calibrate the refrigeration system, contact Thermo.

Optional Display

r1 H

r1 L

Yes

r1 H

r1 L

Run the bath to a suitable highend calibration point. Place a

calibrated reference thermometer

Yes

200.0

in the bath. Ensure the fluid temperature is stabilized. Press

Yes

and hold the NO button and then press the YES button three

times. Release the NO button.

Yes

-40.0

The controller will display CAL.

Yes

Press YES and the controller will display rdt1. Press YES again and the controller will display

r1 H. Press YES again and the

controller will alternately flash

r1 H and the current probe temperature. Use the arrow buttons to adjust the temperature to match the reference thermometer.

Press the SCROLL and NO buttons as shown until

AoUt

Optional Display

StorE is displayed, press YES to accept the new value, press No to abort it.

Repeat for the low-end temperature. Run the bath to a

StorE

suitable low-end calibration point. At the r1 L display use the arrow buttons to adjust the temperature to match a

Yes

ccept All Changes

calibrated reference thermometer.

Press the SCROLL and NO buttons as shown until StorE is displayed, press YES to accept the new value, press NO to abort it.

NOTE: Both the high and low temperatures must be entered for a valid calibration. If power is lost before the procedure is complete, critical data needed for the calculation of calibration parameters will be lost. After pressing the YES button at the StorE prompt wait several seconds before proceeding to ensure that a bad calibration message does not appear. Premature use of the keypad after pressing the YES button may cancel the bad calibration error message.

- 34 -

Page 36

External Temperature

Sensor (rtd2)

Calibration

(Digital Plus Only)

XX.X

Sensor

rtd2

StorE

Hold for 5 seconds

r2 H

Yes Yes

Yes

r2 L

ccept All Changes

When using any external sensor (rtd2) for the first time, Thermo recommends a calibration. This calibration will only affect the temperature read by the external sensor.

Do not pick calibration points that are outside the safe operating limits of the fluid in your application. For example with water, 90°C and 5°C would be typical calibration points.

NOTE: If it is more convenient, the lowend calibration can be performed before doing the high-end.

r2 H

Yes

200.0

Run the bath to a suitable high-end calibration point. Place the sensor and

Yes

a calibrated reference thermometer in the bath. Ensure the fluid temperature

is stabilized. Press and hold the

Yes

r2 L

Yes

-40.0

Yes

Sensor button for five seconds. The controller will display rtd2. Press YES and the controller will display r2 H. Press YES and the display will alternately flash r2 H and the current probe temperature. Use the arrow buttons to adjust the temperature to match the reference thermometer.

Maintenance

Press the SCROLL and NO buttons until StorE is displayed, pressing YES accepts the new value.

Repeat for the low-end temperature. Run the bath to a suitable low-end calibration point. At the r2 L display use the arrow buttons to adjust the temperature to match a calibrated reference thermometer.

Pressing the SCROLL button after the low calibration will display StorE, pressing YES accepts the new value.

If the SCROLL button is not pressed for 60 seconds the function will time-out and the changes will not be saved. Pressing Mute will also exit the calibration and return you to the reservoir fluid temperature display.

- 35 -

Page 37

Optional Analog Port/

Calibration (Digital Plus Only)

Press and Hold

X.X

Yes

Release

485, and A In. With A In displayed, press the Computer button again until StorE is displayed, press YES. The Computer button will flash when A in is

enabled. Use the Computer button to enable/disable the analog signal.

Maintenance

Yes

AoUt

CAL

rtd1

rdt3

A in

StorE

Yes

A iH

A iL

A oH

ccept All Changes

The analog input and output are calibrated at the factory. If you need to recalibrate follow the diagram until the display indicates A in.

Pressing YES at the A in display and the display will indicate A iH. Press YES and the display will alternate between A iH and some value. Apply 2.5V to the analog input pin 15, see page 27 (analog ground is pin 6). Measure the precise value with a voltmeter.

Change the value on the bath display to match the voltmeter reading.

Press SCROLL to check your value and

Yes

A iH

A iL

x.xxxx

Yes

then press SCROLL again to display A iL.

If desired, repeat the procedure for A iL.

Yes

Apply 0V to pin 15. Measure the voltage

and change the displayed value to match it

Pressing YES at the AoUt display and the

Yes

A oH

x.xxxx

display will indicate A oH. Press YES and

the display will alternate between A oH and 2.5000, the bath will set the Temp Out pin 7 output voltage to approximately 2.5V.

Yes

A oL

x.xxxx

Yes

Measure the voltage and change the

displayed value to match it. Press SCROLL to check your value and then

Factory preset values: A iH = 2.5000 A iL = 0.0000 A oH = 2.5000 A oL = -.5000

press SCROLL again to display A oL.

If desired, repeat the procedure for A oL. The display will alternate between A oH and -.5000, the bath will set the Temp Out pin 7 output voltage to approximately

-0.5V. Measure the voltage and change the value to match the meter.

At the StorE display press YES to save the calibration, press No to abort it.

NOTE: If error code Er16 appears you will need to recalibrate.

- 36 -

Page 38

Error Codes

Section V Troubleshooting

On Start Up:

ROM checksum. Check with Thermo Test failure. Locks up the program Display board failure. Clears when display board is fixed Critical checksum failure. Check with Thermo

Operational Errors:

Asynchronous communication error, check serial interface parameters

Bad calibration data entered using Calibration Loop. Redo calibration

Unusual Hardware Conditions

These errors will flash on the display and cannot be cleared. These are internal controller problems.

through - Interrupt errors during runtime

Synchronous communication error

BOM invalid. Contact Thermo

Functional/ Machine Errors

Warnings self-clear after the cause of the error is identified and corrected. Faults require pressing I/0 to clear the error message and then pressing I/0 again to start the unit after the cause of the error is identified and corrected.

Error Display Indication

Low temp setpoint warning/fault, see page 21 Low level warning, fluid below safe operating level High temp setpoint warning/fault, see page 21

Refrigeration sensor shorted Refrigeration sensor open Shorted external temperature sensor (rtd2) Open external temperature sensor (rtd2) Shorted internal temperature sensor (rtd1)

Troubleshooting

Open internal temperature sensor (rtd1) Fluid low level fault - unit shuts down Refrigeration assembly high temp fault - unit shuts down

Continued on next page.

- 37 -

Page 39

External Sensor

1 2 3 4 5

6 7 8 9

Connector

High temp fault - unit shuts down, see page 28

Configuration error

Invalid timer setting, see page 25

Offset setting = 0 or not defined, see page 26

Feature not available because serial communication mode is enabled

Unit reaction to warning/fault errors depend on how the unit is configured, see Setup/Tuning Loop on page 20. The unit is shipped configured to continue running. If any other code appears contact Thermo customer service.

Digital Plus units are equipped with a male 9-pin D-connector located on the rear of the control box. The connector is used with an optional external sensor.

Troubleshooting

Pin # Function

Example

1 3-wire RTD connection A 2 No connection 3 No connection 4 3-wire RTD connection A 5 No connection 6 No connection. 7 3-wire RTD connection B 8 No connection 9 No connection

Hardware Internal Connector Mating Connector

AMP Part# 745492-2 AMP Part# 745491-2

RTD

- 38 -

Page 40

Checklist

Unit will not start

Check the line cord; ensure it is plugged in.

Check the position of the circuit breaker on the rear of the unit.

Check reservoir. Unit will not start if fluid level is below the lower horizontal slit.

On Digital Plus controllers, check Serial Communication Mode on or off.

Check the controller for error codes, see previous page.

Make sure the voltage of the power source meets the specified voltage, ±10%. Refer to the serial number label on the rear of the unit to identify the specific electrical requirements of your unit.

Loss of cooling capacity

Be sure the cooling capacity of the unit has not been exceeded if circulating to an external system.

Proper ventilation is required for heat removal. Ensure ventilation through the front and rear panels is not impeded and the panels are free of dust and debris.

Ice build up on the cooling coils can act as insulation and lower the cooling capacity. Raise the temperature of the bath to de-ice the cooling coil and increase the concentration of non-freezing fluid.

RTE 7 "clicking"

Turn the unit off to initiate the 30 second refrigeration pressure equalization “off” delay. Turn the unit back on to initiate the 30 second refrigeration pressure equalization “on” delay.

The RTE 7 is not designed to be used beyond the voltage range or have momentary power interruptions. Install an “un-interruptible power supply” or a line loss detection method.

Unit not cooling above 50°C

The unit is not in the Full Range Cooling Mode. See Setup Loop on page 21.

No external circulation

Check for obstructions, kinks, or leaks in the circulation tubing.

Circulation will cease when the pump head has been exceeded.

Troubleshooting

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Continued on next page.

Page 41

No/poor temperature control

On Digital Plus controllers, check Serial Communication Mode on or off.

Check controller PID values. See next page for factory preset values. NOTE: Using high viscosity fluids at low temperatures may require PID adjustment, contact Thermo.

Calibrate internal temperature sensor.

Check optional external sensor connection. Perform calibration.

High Temperature Cutout activated, see page 28.

No serial communications

All units are tested for serial communications before they leave the factory. Ensure the Computer indicator on the controller is on.

Check all settings and commands, they must be exact. See Appendix B. Check all wiring for proper connections or possible shorts. Software to verify serial communication is available from Thermo.

Service Assistance

Troubleshooting

PID Values

If, after following these troubleshooting steps, your unit fails to operate properly, contact our Service Department for assistance, see back cover. Before calling, please obtain the following information:

- unit BOM number

- unit serial number

- software version

- voltage of power source

- fluid used

The factory set PID values for most units are:

PI D PI D

Cool 0.6 0.6 0.0 Heat 0.6 0.6 0.0

The factory set COOL PID values for 100V and 115V RTE 740s are:

PI D

Cool 0.4 0.6 0.0

The factory set HEAT PID values for 230V RTE 740s are:

PI D

Heat 1.2 0.6 0.0

Thermo does not recommend changing the PID values. Incorrect PID values will hamper unit performance.

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Page 42

BOM Decoder

Digit#

The Bill of Material (BOM) number helps identify the configuration of your unit. The number is printed on the label located on the rear of the unit.

Displaying Software

Version Number

(Digital One/Digital Plus)

Unit Identifier 271 = R-7 272 = R-10 273 = R-17 274 = R-740

Condenser Cooling Mode 0 = None 1 = Sta ndard Air 9 = Custom

Pump 20 = Z-Pump 99 = Custom

Voltage 03 = 11 5/60/1 11 = 100/50/1, 100/60/1 25 = 230/50/1 99 = Custom

Controller 00 = Digital One 01 = Digital Plus 02 = Digital Plus w/Analog I/O 10mV/ °C 99 = Custom

Reserved 00

These values will be needed when calling Thermo for sales/service information. The controller can display the installed software version number. For example, for a unit with software version 082645.1A:

1. Unit is running normally and displaying reservoir fluid temperature.

2. Press and hold No for at least 10 seconds. The display will show the first two digits, for example: 08.

3. Press

Troubleshooting

The display will show the remaining digits to the left of the decimal, for example: 2645.

4. Press The display will show the decimal point and the digit to the right of the

decimal point, for example, 1 .

5. Press The display will show the revision letter, as its equivalent number, for

example, 1 = A.

6. Press The display will flash between Csu and the software checksum value.

7. Press The display returns to the reservoir fluid temperature.

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Blank Page.

Page 44

Appendix A Fluids

Water Quality Standard and Recommendations

Microbiologicals

(algae, bacteria, fungi) 0 0

Inorganic Chemicals

Calcium <25 <0.6 Chloride <25 <10 Magnesium <12 <0.1 Sulfate <25 <1 Total Hardness <17 <0.05

Unfavorably high total ionized solids (TIS) can accelerate the rate of galvanic corrosion. These contaminants can function as electrolytes which increase the potential for galvanic cell corrosion and lead to localized corrosion such as pitting which can be observed at the studs and on the outside surface of cooling coils. Eventually, the pitting will become so extensive that the coil will leak refrigerant into the water reservoir.

Permissible (PPM) Desirable (PPM)

For example, tap water in the U.S. averages 171 ppm (of NaCl). The recommended level for use in a water system is between 0.5 to 5.0 ppm (of NaCl).

Recommendation: Initially fill the tank with distilled/deionized water. Do not use untreated tap water as the total ionized solids level may be too high.

Maintain this water quality at a resistivity of between 1 to 10 megohm-cm (compensated to 25°C) by using a purification system. Although the initial fill may be as high as 18 megohm-cm (compensated to 25°C), the desired level for long time usage is 1 to 3 megohm-cm (compensated to 25°C).

The above two recommendations will reduce the electrolytic potential of the water and prevent or reduce the galvanic corrosion observed.

Appendix A

A -1

Page 45

RTE Compatibility with

Recommended Fluids

Filtered/Singled Distilled water

This fluid is recommended primarily because it has all microorganisms that cause biological fouling removed through vaporizing and condensing the water. However, distilled water does not remain pure for very long when exposed to the atmosphere. Air-born spores can contaminate the water and activate alga growth. Chloramine-T is a compatible algaecide that can be used to combat growth but a more effective maintenance plan would include switching out the fluid with newly distilled water every six month. The particulates that have been filtered out in the process are also preventative in keeping the system “clean” of contaminants. One thing to note is that distilling water that contains an additive could increase the concentration of that additive in the water.

50/50 Uninhibited Ethylene Glycol/Water

Ethylene glycol is used to depress the freezing point of water as a coolant. We recommend not using the uninhibited (no corrosion additives) above 60°C because it breaks down into acidic byproducts faster at high temperatures. These acidic by-products, especially carbonic acid, are corrosive to copper. The inhibitors are used to control the corrosion rates by passivating the metal surfaces with an inert film. Uninhibited ethylene is more corrosive to copper that plain water so therefore it is not recommended unless it is required for the application.

50/50 Inhibited Ethylene Glycol/ Water

Inhibited glycol can be used to increase the operating temperature range of the fluid but should not be used as a “pre-mixed anticorrosive” solution. Again, this fluid does break down over time at high temperatures. Dow uses a pH standard of 8 to base when the fluid has become corrosive. Dowtherm is an ethylene based product that contains dipotassium phosphates in a 4% concentration. The recommended use of Dowtherm is mixing with distilled or deionized water or water that contains less than 25 ppm chloride and sulfate and less than 100 ppm total hardness of CACO3. The general term, inhibited glycol/water, almost too close to meaning inhibited water. Inhibited water can have many types of additives including chromate that will foul our cooling system very quickly.

Appendix A

50/50 Uninhibited Propylene Glycol/ Water

Although the use of this glycol similar to ethylene glycol, propylene glycol is considered “safe” to use in the food industry. Propylene is less dense than ethylene and therefore will have a tendency to weep more through mechanical seals.

50/50 Inhibited Propylene Glycol/ Water

Same issues as with uninhibited propylene and uninhibited ethylene glycol.

Deionized water (1-3 megohm, compensated)

This water has the ions controlled so that they will not conduct and cause galvanic corrosion between dissimilar metals. Deionized water is aggressive to metal when it is too pure since this is not the normal state of water. The leaching of metallic ions from the metal surface is seen in pitting.

NEVER use flammable or corrosive fluids with this unit. Do not use automotive antifreeze. Commercial antifreeze contains silicates that can damage the unit. Use of automotive antifreeze may void the manufacturer’s warranty.

A -2

Page 46

Appendix B NC Serial Communications Protocol

(Digital Plus Only)

9-pin female

NOTE: This appendix assumes you have a basic understanding of serial communications protocols.

All data is sent and received in binary form, do not use ASCII. In the following pages the binary data is represented in hexadecimal (hex) format.

The NC Serial Communications Protocol is based on a master-slave model. The master is a host computer, while the slave is the bath's controller. Only the master can initiate a communications transaction (half-duplex). The bath ends the transaction by responding to the master’s query. The protocol uses either an RS-232 or RS-485 serial interface with the default parameters: 19200 baud, 1 start bit, 8 data bits, 1 stop bit, no parity, and for RS-485 a selectable address from 1 to 100.

NOTE: Before the unit will communicate, serial communication must be turned on using the controller's Computer button.

The unit can be controlled through your computer’s serial port by using the unit's standard female 9-pin connections.

RS-232 RS-485

1 No Connection 1- 7 No Connection 2TX 8T+ 3RX 9T4 No Connection 5 Signal Ground 6 - 9 No Connection

To connect the bath to your computer, a M/F 9 pin D-Subminiature extension cable will be required. See page 31 for cables available from Thermo.

All commands must be entered in the exact format shown in the tables on the following pages. The tables on the last page of this Appendix show all commands available, their format and responses. Controller responses are either the requested data or an error message. The controller response must be received before the host sends the next command.

The host sends a command embedded in a single communications packet, then waits for the controller’s response. If the command is not understood or the checksums do not agree, the controller responds with an error command. Otherwise, the controller responds with the requested data. If the controller fails to respond within 1 second, the host should re-send the command.

During RS-485 operation the bath will wait at least 5 milliseconds after receiving the checksum byte before asserting its transmitter for the purpose of replying to the host. Therefore, when the host is done sending a command, it must disable its transmitter in less than 5 milliseconds. When the bath is done sending its reply, it will disable its transmitter in less than 5 milliseconds.

B -1

Appendix B

Page 47

NC Serial Communications Protocol

NOTE: All byte values are shown in hex, hex represents the binary values that must be sent to the bath. Do not use ASCII.

The framing of the communications packet in both directions is:

Checksum region

Lead char Addr-MSB Addr-LSB Command n d-bytes d-byte 1 ... d-byte n Checksum CA or CC 00

Lead char RS-232 = CA (hex) RS-485 = CC (hex).

Device address is 1 - 64 hex (1 - 100 decimal)

Addr-msb Most significant byte of device address is 00 hex. Addr-lsb Least significant byte of device address is 01 - 64 hex (1 - 100 decimal) for

RS-485, 01 for RS-232.

Command Command byte (see Table 1). n d-bytes Number of data bytes to follow (00 to 08 hex).

d-byte 1 1st data byte (the qualifier byte is considered a data byte).

... ...

d-byte n nth data byte. Checksum Bitwise inversion of the 1 byte sum of bytes beginning with the most signifi-

cant address byte and ending with the byte preceding the checksum. (To perform a bitwise inversion, "exclusive OR" the one byte sum with FF hex.)

The master requests information by sending one of the Read Functions as shown in Table 1 on page B-4. Since no data is sent to the bath during a read request, the master uses 00 for the number of data bytes following the command byte.

The bath will respond to a Read Function by echoing the lead character, address, and command byte, followed by the requested data and checksum. When the bath sends data, a qualifier byte is sent first, followed by a two byte signed integer (16 bit, MSB sent first). The qualifier byte indicates the precision and units of measure for the requested data as detailed in Table 2.

As an RS-232 example, the master requests to read internal temperature by sending:

command byte

CA 00 01 20 00 DE

0 bytes of data

If the temperature is 62.5°C, the bath would reply:

Appendix B

command byte

The checksum is the bitwise inversion of 21 (00+01+20+00) = 21

byte values are in hex

The qualifier byte of 11 indicates a precision of 1 decimal point and units of °C. The temperature of

62.5°C is 625 decimal = 271 hex.

CA 00 01 20 03 11 02 71 57

3 bytes to follow

The checksum is the bitwise inversion of CB (00+01+20+03+11+FF+97) = 1CB Take the LSB = CB

B - 2

Page 48

The master sets parameters in the bath by sending one of the Set Functions as shown in Table 1. The master does not send a qualifier byte in the data field. The master should be pre-programmed to send the correct precision and units (it could also read the parameter of interest first to decode the correct precision and units needed).

As an RS-485 example, if the master wants to set the setpoint to 30°C, it would send :

command byte

The checksum is the bitwise inversion of 22 (00+03+F0+02+01+2C) = 122 Take the LSB = 22

CC 00 03 F0 02 01 2C DD

The bath responds:

2 bytes to follow

command byte

The temperature of 30.0°C is 300 decimal = 012C hex.

The qualifier byte of 11 indicates a precision of 1 decimal point and units of °C. The temperature of

30.0°C is 300 decimal = 012C hex.

CC 00 03 F0 03 11 01 2C CB

3 bytes to follow

The checksum is the bitwise inversion of 34 (00+03+F0+03+11+01+2C) = 134 Take the LSB = 34

B - 3

Appendix B

Page 49

Table 1 (All bytes are in hex)

RS-232. For RS-485 substitute CC for CA as the lead character.

FUNCTION MASTER SENDS BATH RESPONDS

READ Read Acknowledge CA 00 01 00 00 FE CA 00 01 00 02(v1)(v2)(cs) Read Status* CA 00 01 09 00 F5 CA 00 01 09 05(d1)(d2)(d3)(d4)(d5)(cs) Read Internal Temperature CA 00 01 20 00 DE CA 00 01 20 03(qb)(d1)(d2)(cs) Read External Sensor CA 00 01 21 00 DD CA 00 01 21 03(qb)(d1)(d2)(cs) Read Setpoint (control point) CA 00 01 70 00 8E CA 00 01 70 03(qb)(d1)(d2)(cs) Read Low Temperature Limit CA 00 01 40 00 BE CA 00 01 40 03(qb)(d1)(d2)(cs) Read High Temperature Limit CA 00 01 60 00 9E CA 00 01 60 03(qb)(d1)(d2)(cs) Read Heat Proportional Band (P) CA 00 01 71 00 8D CA 00 01 71 03(qb)(d1)(d2)(cs) Read Heat Integral (I) CA 00 01 72 00 8C CA 00 01 72 03(qb)(d1)(d2)(cs) Read Heat Derivative (D) CA 00 01 73 00 8B CA 00 01 73 03(qb)(d1)(d2)(cs) Read Cool Proportional Band (P) CA 00 01 74 00 84 CA 00 01 74 03(qb)(d1)(d2)(cs) Read Cool Integral (I) CA 00 01 75 00 89 CA 00 01 75 03(qb)(d1)(d2)(cs) Read Cool Derivative (D) CA 00 01 76 00 88 CA 00 01 76 03(qb)(d1)(d2)(cs)

SET Set Setpoint (control point)** CA 00 01 F0 02(d1)(d2)(cs) CA 00 01 F0 03 (qb)(d1)(d2)(cs) Set Low Temperature Limit** CA 00 01 C0 02(d1)(d2)(cs) CA 00 01 C0 03(qb)(d1)(d2)(cs) Set High Temperature Limit** CA 00 01 E0 02(d1)(d2)(cs) CA 00 01 E0 03(qb)(d1)(d2)(cs) Set Heat Proportional Band CA 00 01 F1 02(d1)(d2)(cs) CA 00 01 F1 03(qb)(d1)(d2)(cs) (P = 0.1-99.9) Set Heat Integral (I = 0-9.99) CA 00 01 F2 02(d1)(d2)(cs) CA 00 01 F2 03(qb)(d1)(d2)(cs) Set Heat Derivative (D = 0-5.0) CA 00 01 F3 02(d1)(d2)(cs) CA 00 01 F3 03(qb)(d1)(d2)(cs) Set Cool Proportional Band CA 00 01 F4 02(d1)(d2)(cs) CA 00 01 F4 03(qb)(d1)(d2)(cs) (P = 0.1-99.9) Set Cool Integral (I = 0-9.99) CA 00 01 F5 02(d1)(d2)(cs) CA 00 01 F5 03(qb)(d1)(d2)(cs) Set Cool Derivative (D = 0-5.0) CA 00 01 F6 02(d1)(d2)(cs) CA 00 01 F6 03(qb)(d1)(d2)(cs)

Set On/Off Array CA 00 01 81 088(d1)...(d8)(cs) CA 00 01 81 08(d1)...(d8)(cs)

d1 = unit on/off, d2 = sensor enable, d3 = faults enabled, d4 = mute, d5 = auto restart, d6 = 0.01°C enable, d7 = full range cool enable, d8 = serial comm enable (di: 0 = off, 1 = on, 2 = no change)

For example, to turn the unit on send CA 00 01 81 08 01 02 02 02 02 02 02 02 cs

BATH ERROR RESPONSES Bad Command N/A CA 00 01 0F 02 01 ed cs Bad Checksum N/A CA 00 01 0F 02 03 ed cs

Appendix B

command bytes shown in bold ed = echo back of the command byte as received qb = qualifier byte, see Table 3 v1,v2 = protocol version d1,d2 = 16 bit signed integer of the value being sent or received * See Read Status, Table 2 cs = the checksum of the string (see text) ** limited to the range of the bath

B - 4

Page 50

Table 2 Read Status

BIT d1 d2 d3 b.7 = 1 RTD1 Open Fault RTD2 Open Fault High Fixed Temp Fault b.6 = 1 RTD1 Shorted Fault RTD2 Shorted Fault Low Fixed Temp Fault b.5 = 1 RTD1 Open RTD2 Open Warn High Temp Fault b.4 = 1 RTD1 Shorted RTD2 Shorted Warn Low Temp Fault b.3 = 1 RTD3 Open Fault RTD2 Open Low Level Fault b.2 = 1 RTD3 Shorted Fault RTD2 Shorted High Temp Warn b.1 = 1 RTD3 Open Refrig High Temp Low Temp Warn b.0 = 1 RTD3 Shorted HTC Fault Low Level Warn

BIT d4 d5 b.7 = 1 Buzzer On RTD2 Controlling b.6 = 1 Alarm Muted Heat LED Flashing** b.5 = 1 Unit Faulted Heat LED On** b.4 = 1 Unit Stopping Cool LED Flashing** b.3 = 1 Unit On Col LED On** b.2 = 1 Pump On 0 b.1 = 1 Compressor On 0 b.0 = 1 Heater On 0

**LED bits in REQ STATUS1 byte d5 LED State LED Flashing LED On OFF 0 0 ON 0 1 FLASHING 1 1 Invalid 1 0

b.7 = most significan bit b.0 = least signifcant bit

Table 3 Qualifier Byte

10 hex 0.1 precision, no units of measure 20 hex 0.01 precision, no units of measure 11 hex 0.1 precision, °C units 21 hex 0.01 precision, °C units

Example: The temperature of 45.6 °C would be represented by the qualifier 11 hex, followed by the 2 bytes 01 C8 hex (456 decimal).

Appendix B

B - 5

Page 51

Appendix C International Quick Reference Operating Procedures

Verkorte handleiding

Het apparaat heeft een luchtgekoeld koelsysteem. De luchtinlaat is aan de voorzijde. De luchtuitlaat is aan de twee zijkanten en aan de achterzijde. Plaats het apparaat zo dat de luchtaanvoer niet geblokkeerd is. Bij onvoldoende luchtdoorstroming zal het koelvermogen afnemen. In extreme gevallen zal de compressor uitvallen. Een minimale afstand van 12 inches (30 centimeter) aan de voor- en achterkant van de unit is noodzakelijk voor een goede ventilatie.

Wanneer u wilt circuleren naar een extern systeem, dient u altijd extra vloeistof achter de hand te houden om het juiste vloeistofniveau, zowel in het interne als het externe gedeelte van het systeem, te handhaven.

Gebruik het apparaat nooit wanneer het reservoir leeg is.

Het apparaat is voorzien van een afvoer, welke bevestigd is aan de achterkant van het apparaat.

Plaats het apparaat niet in stoffige, corrosieve en/of vochtige ruimtes. Maak het apparaat regelmatig schoon. Voor een goede werking moet het apparaat voldoende lucht door de condensor laten stromen. Een ophoping van stof of andere deeltjes zullen het koelvermogen nadelig beïnvloeden. Het apparaat zal de opgegeven specificaties halen tot een omgevingstemperatuur van ongeveer +77°F(+25°C).

Het voltage moet voldoen aan het opgegeven voltage, ±10%.

De aansluitingen voor de waterslangen zijn gelabeld en bevinden zich aan de achterzijde. De aansluitingen zijn naar boven gericht, zodat de recirculatievloeistof terug in het reservoir stroomt als de slangen afgekoppeld zijn. Beide connectoren zijn van roestvrijstaal. De aansluitingen zijn ¼ inch FPT zodat er standaard aansluitmateriaal gebruikt kan worden. Voor uw gemak zijn er slangpilaren bijgesloten.

De slangaansluitingen zijn bevestigd aan de achterkant van het apparaat en zijn voorzien van het

label en . Deze roestvrijstalen aansluitingen kunnen aangesloten worden op een 3/8

inch ID flexibele slang. Verwijder de roestvrijstalen schroefdoppen, indien externe circulatie gewenst is.

Bevestig de aan de ingang van uw applicatie. Bevestig de aan de uitgang van uw applicatie.

Vul nu het reservoir tot het volgende niveau: tussen de horizontale markeringen op de roestvrijstalen scheidingsplaat, die de werkruimte van het pompgedeelte scheidt.

Gebruik nooit brandbare of andere koelvloeistoffen die het toestel kunnen beschadigen. De vloeistof die u gaat gebruiken moet een viscositeit hebben van 50 centistokes of minder bij lage temperatuur werking. Kraanwater wordt in het algemeen aanbevolen wanneer u bij temperaturen werkt van +8°C tot +80°C.

Operationeel gebruik

Alvorens het apparaat in gebruik te nemen, dient u eerst alle elektrische- en slangaansluitingen te controleren. Tevens dient u te controleren of het systeem gevuld is met koelvloeistof.

Om het apparaat te starten druk op . Om het

apparaat uit te schakelen druk nogmaals op .

Temperatuur Instelling

Druk op om de ingestelde temperatuur te zien. De indicator licht op en de ingestelde waarde knippert.

Druk op de knop met het pijltje totdat de gewenste temperatuur is ingesteld. Druk nogmaals op om de

wijziging te bevestigen. De display knippert enkele malen snel en zal dan weer de actuele temperatuur laten zien.

Periodiek onderhoud

Controleer regelmatig de vloeistof. Als de vloeistof ververst moet worden handel dan als volgt: Laat de vloeistof uit het apparaat lopen. Aan de achterzijde van het apparaat bevindt zich een afvoerkraantje. Spoel het reservoir door met een spoelvloeistof die geschikt is voor het apparaat en de koelvloeistof. Het is noodzakelijk om de ribben van de condensor regelmatig schoon te maken met behulp van een stofzuiger.

Check de condensor maandelijks. Na enige maanden kunt u de frequentie van het schoonmaken bepalen.

C-1

Page 52

WARRANTY

Thermo Electron Corporation warrants for 24 months from date of shipment any Thermo unit according to the following terms.

Any part of the unit manufactured or supplied by Thermo and found in the reasonable judgment of Thermo to be defective in material or workmanship will be repaired at an authorized Thermo Repair Depot without charge for parts or labor. The unit, including any defective part must be returned to an authorized Thermo Repair Depot within the warranty period. The expense of returning the unit to the authorized Thermo Repair Depot for warranty service will be paid for by the buyer. Thermo's responsibility in respect to warranty claims is limited to performing the required repairs or replacements, and no claim of breach of warranty shall be cause for cancellation or recision of the contract of sales of any unit. With respect to units that qualify for field service repairs, Thermo’s responsibility is limited to the component parts necessary for the repair and the labor that is required on site to perform the repair. Any travel labor or mileage charges are the financial responsibility of the buyer.

The buyer shall be responsible for any evaluation or warranty service call (including labor charges) if no defects are found with the Thermo product.

This warranty does not cover any unit that has been subject to misuse, neglect, or accident. This warranty does not apply to any damage to the unit that is the result of improper installation or maintenance, or to any unit that has been operated or maintained in any way contrary to the operating or maintenance instructions specified in Thermo’s Instruction and Operation Manual. This warranty does not cover any unit that has been altered or modified so as to change its intended use.

In addition, this warranty does not extend to repairs made by the use of parts, accessories, or fluids which are either incompatible with the unit or adversely affect its operation, performance, or durability.

Thermo reserves the right to change or improve the design of any unit without assuming any obligation to modify any unit previously manufactured.

THE FOREGOING EXPRESS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OR MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

Thermo's OBLIGATION UNDER THIS WARRANTY IS STRICTLY AND EXCLUSIVELY LIMITED TO THE REPAIR OR REPLACEMENT OF DEFECTIVE COMPONENT PARTS AND Thermo DOES NOT ASSUME OR AUTHORIZE ANYONE TO ASSUME FOR IT ANY OTHER OBLIGATION.

Thermo ASSUMES NO RESPONSIBILITY FOR INCIDENTAL, CONSEQUENTIAL, OR OTHER DAMAGES INCLUDING, BUT NOT LIMITED TO LOSS OR DAMAGE TO PROPERTY, LOSS OF PROFITS OR REVENUE, LOSS OF THE UNIT, LOSS OF TIME, OR INCONVENIENCE.

This warranty applies to units sold in the United States. Any units sold elsewhere are warranted by the affiliated marketing company of Thermo. This warranty and all matters arising pursuant to it shall be governed by the law of the State of New Hampshire, United States. All legal actions brought in relation hereto shall be filed in the appropriate state or federal courts in New Hampshire, unless waived by Thermo.

Thermo Scientific NESLAB RTE Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual