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Neslab RTE Refrigerated Bath

1. 40 30 20 10 0 10 20 30 40 5060 70 80 90100 Temperature C Pump Capacity i y Meters Feet 4 9 16 o 37 12 a a 2 4 8 1 2 4 0 8 16 24 3 2 4 0 Gpm 3 6 9 12 15 Lpm Time to Temperature 90 gt gt 115V 60 Hz units 80 Fluid Water c 5 E he Le 0 i NDS 40 N SIT Fluid Specific Heat 0 6 25 50 75 100 125 150 Time Minutes 230V 50 Hz units 90 80 F Fluid Water A RTE 7 Oo a ee IKN AL T b RTE 0 E I HZ IN NTN C RTE 17 SOUT NN TAL EON TAN Nel TES EE 25 50 75 100 125 150 RTE 740 units 80 70 60 50 40 30 Ke Temperature C N o N z oo o 10 20 30 40 50 60 70 Time Minutes Q RTE7 RTE10 RTE17 RTE 740 Dd Heater Watts S 115V 60 Hz Models 800 1600 800 El 230V 50 Hz Models 2000 2000 2000 S 100V 50 60Hz Models 800 1200 800 2 Refrigerant R134a 6 ounces R404a 8 ounces S Bath Work Area Wx L x D Inches 65 8 x 7 4 xX 6 85x 9 3 8 x 6 8 x 9 3 8 x 9 65 8 x 7 4x6 Centimeters 16 8 x 18 3 x 15 2 22 4 x 23 9 x 15 2 22 4 x 23 9 x 22 9 16 8 x 18 3 x 15 2 Bath Volume Gallons 1 9 2 6 4 5 1 9 Liters 7 2 9 8 17 0 7 2 Air Flow Requirements SCFM 170 200 Weight Pounds 60 68 71 87 Kilograms 27 2 30 8 32 2 39 5 1 Specifications subject to change 2 Baths are tested at temperatures below freezing with denatured alcohol Thi
2. 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 specializ ing in heat transfer fluids Ensure the drain on the back of the unit is closed before filling the unit 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 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 A Avoid overfilling fluids expand when heated 6 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 5 Y 2 D e Qa o Ke o e gt Digital One Controller ON OFF Use
3. Condenser Cleaning A 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 andtime of usage Before changing the cooling fluid ensure it is at a safe handling tem perature Routine cleaning can be achieved by simply sponging down the seamless 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 3 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 o
4. 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 then press SCROLL again to display A iL If desired repeat the procedure for AiL Apply OV to pin 15 Measure the voltage and change the displayed value to match it Pressing YES at the AoUt display and the 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 Measure the voltage and change the displayed value to match it Press SCROLL to check your value and then press SCROLL again to display A oL Factory preset values AiH 2 5000 AiL 0 0000 j hole 2 5000 If desired repeat the procedure for A oL AoL 5000 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 Section V Troubleshooting Error Codes On Start Up amp GG ROM checksum Check with Thermo ErG i Testfailure Locks up the program Er ld Display board failure Clears when display board is fixed E G4 Critical checksum failure Check with Thermo Operational Errors Er 15 Asynchronous communic
5. S a 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 3 HEAT CONTROL SENSOR INTERNAL coor 120 0 C SETPOINT EXTERNAL SENSOR 40 0 C SETPOINT 35 5 C SENSOR OFF TIMER OFF OFFSET OFF Typical RPC Display Description Part Number RPC 100 115V 50 60Hz 15 604012000401 with NEMA 5 15P type plug RPC 100 240V 50 60Hz2 1 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 A Service Contracts Reservoir Fluid Reservoir Cleaning Algae
6. 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 concentra tion 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 CACOS 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 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 ten dency 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 t
7. 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 Hold for 5 seconds Offset t A OFSEt ja gt XXX X Y o Accept All Changes NOTE Offset only changes the display ofthe 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 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 senda signal to change the display value the offset value is returned 296 A
8. 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 low O Hold for 5 seconds end calibration can be performed before doing the high end Run the bath to a suitable high end calibration point Place the sensor and acalibrated reference thermometer in the bath Ensure the fluid temperature is stabilized Press and hold the 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 Accept All Changes buttons to adjust the temperature to match the reference thermometer 5 5 D 5 0 O 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 calibra tion 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 di
9. press W The display will indicate tunE Use the arrow keys to sequence through the loop and to change a display Use to confirm any changes cot NOTE For RTE 7 10 and 17 units the COOL PID display only appears if the Energy Saving CooL Thermo recommends that only a qualified technician change PID parameters Incorrect PID values will hamper unit perfor mance See page 40 for factory preset PID values N mode is enabled 5 see below V gt 77 2 D le gt o gt Qa O T tet le Ml AN Yes NY Factory preset off AN Yes WA Factory preset off yee ZN 5 ao Factory preset 0 1 Factory preset off Full range cooling mode allows the refrigeration to operate throughout the entire temperature range If y off refrigeration is available only below 50 C Yes RTE 7 10 17 only ESAUE lt gt N Factory preset off 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 Accept All Changes AN Changes made in the Tuning Setup Loop take affect when is pressed at the StorE prompt Pressing at the prompt aborts all changes 21 c E ae a e D S c E Ly S a Controller Digital Plus Only Mute Na
10. properly grounded outlet It is the user s responsibility to assure a proper ground connec tion 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 ora line loss detection method All units are Pollution Category 2 Overcurrent Protection II The following power options are available Breaker Power Inlet Amps RTE7 12 12 12 12 12 12 16 16 12 16 16 12 115 60 1 100 50 60 1 230 50 1 115 60 1 100 50 60 1 230 50 1 115 60 1 100 50 60 1 230 50 1 RTE740 115 60 1 100 50 60 1 230 50 1 IEC 320 C 13 IEC 320 C 13 IEC 320 C 19 IEC 320 C 13 IEC 320 C 13 IEC 320 C 19 IEC 320 C 19 IEC 320 C 19 IEC 320 C 19 IEC 320 C 19 IEC 320 C 19 IEC 320 C 19 RTE 10 RTE 17 1 Average Amp draw lt 12 Unit Type Amperage Plug Type 115 60 1 15 NEMA 5 15 115 60 1 NEMA 5 20 100 50 60 1 NEMA 5 15 100 50 60 1 NEMA 5 20 230 50 1 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 3 o 2 D
11. 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 ora line loss detection method 4 fe o 0 gt fo fe 3 Ke 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 Continued on next page 39 ke fe lt n En Q gt Service Assistance PID Values 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 hig
12. 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 gt YES ARROW Use this key to increment numerical values when setting values and to accept new settings 5 ao NO ARROW Use this key to decrement numerical values when setting values and to abort new settings a 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 17 c O g Lu D a ce D S c E Ly S 0 gt 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 lowtemperature alarm High Temperature Alarm Indicates the controller is displaying the current hightemperature 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 th
13. us at neslabmanuals thermo com Be sure to include the manual part number and the revision date listed on the front cover 3 Warnings A A Section 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 poun
14. 01 20 00 DE O bytes of data byte values are in hex If the temperature is 62 5 the bath would reply 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 command byte 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 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 The checksum is the bitwise inversion of 22 command byte 00 03 F0 02 01 2C 122 Take the LSB 22 CC 00 03 FO 02 01 2C DD 2 bytes to follow The temperature of 30 0 C is 300 decimal 012C hex The bath responds The qualifier byte of 11 indicates a precision of 1 decimal point and units of C The temperature of 7 80 0 C is 300 decimal 012C hex command byte a 7 CC 00 03 FO 03 11 01 2C CB The checksum is the bitwise inversion of 34 3 bytes to follow 00 03 F0 03 11 01 2C 134 Take the LSB 34 g xipuaddy Table 1 All bytes are in hex RS 232 For RS 485 substitute CC for CA as the lead charact
15. R 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 appropri ate state or federal courts in New Hampshire unless waived by Thermo
16. Sensor Computer 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 communi cations 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 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
17. Steel Test Tube Racks Unit Test Tubes maximum Size mm Part Number RTE7 49 13 126000000040 RTE7 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 uonesedg pue uonelle1su External Sensors Digital Plus only Description Part Number 6 LX 187 DIA 6 Lead Stainless Steel probe 058520 18 LX 187 DIA 6 Lead Stainless Steel probe 058521 1 5 LX 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 LX 187 DIA 15 Lead Stainless Steel probe 126000000025 6 LX 187 DIA 20 Lead Stainless Steel probe 126000000029 6 L X 187 DIA 30 Lead Stainless Steel probe 126000000024 1 5 LX 187 DIA 30 Lead Stainless Steel probe 126000000033 GFCI Breaker Line Cords 115V 60Hz units only 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 c he o ce D c T
18. YES again and the Yes rtd3 is used to calibrate the controller will alternately flash ln system contact r1 H and the current probe temperature Use the arrow ermo buttons to adjust the temperature to match the reference thermometer Press the SCROLL and NO buttons as shown until 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 suitable low end calibration point At the r1 L display use the arrow buttons to adjust the temperature to match a Accept 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 calibra tion 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 External Temperature Sensor rtd2 Calibration Digital Plus Only 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
19. ate LED Flashing OFF 0 ON 0 FLASHING 1 Invalid 1 b 7 most significan bit b 0 least signifcant bit Table 3 Qualifier Byte RTD2 Open Fault RTD2 Shorted Fault RTD2 Open Warn RTD2 Shorted Warn RTD2 Open RTD2 Shorted Refrig High Temp HTC Fault RTD2 Controlling Heat LED Flashing Heat LED On Cool LED Flashing Col LED On LED On 0 1 1 0 0 1 precision no units of measure 0 01 precision no units of measure 0 1 precision C units 0 01 precision C units High Fixed Temp Fault Low Fixed Temp Fault High Temp Fault Low Temp Fault Low Level Fault High Temp Warn Low Temp Warn Low Level Warn 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 g xipuaddy 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 Plaats het apparaat niet in stoffige corrosieve en of vochtige ruimtes Maak het apparaat regelmatig schoon Voor een
20. ation 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 External Sensor Connector Digital Plus units are equipped with a male 9 pin D connector located on the o rear of the control box The connector is used with an optional external sensor ql o Pin Function 3 wire RTD connection A 6829 Gp eal Example No connection No connection 3 wire RTD connection A No connection Noconnection 3 wire RTD connection B No connection No connection RTD D fe Y D Q gt b OAN DOA REN Hardware Internal Connector Mating Connector AMP Part 745492 2 AMP Partit 745491 2 38 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
21. ation error check serial interface parameters Er 16 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 ECU through Er 13 Interrupt errors during runtime Er l Synchronous communication error Conf BOM invalid Contact Thermo Functional Machine Errors Warnings self clear after the cause of the error is identified and corrected Faults require pressing 1 0 to clear the error message and then pressing 3 1 0 again to start the unit after the cause of the error is identified and corrected Es Error Display Indication a Lot Low temp setpoint warning fault see page 21 a Add Low level warning fluid below safe operating level HE High temp setpoint warning fault see page 21 Er 11 Refrigeration sensor shorted Er 18 Refrigeration sensor open Ere Shorted external temperature sensor rtd2 Eres Open external temperature sensor rtd2 EG Shorted internal temperature sensor rtd1 E 265 Open internal temperature sensor rtd1 LL Fluid low level fault unit shuts down RHE Refrigeration assembly high temp fault unit shuts down Continued on next page 37 HEL High temp fault unit shuts down see page 28 Er 5 Configuration error ErSe Invalid timer setting see page 25 Er53 Offset setting 0 or not defined see page 26 cron Feature not available because serial communic
22. d1 d2 cs CA0001 E003 qb d1 d2 cs CA 00 01 F1 02 d1 d2 cs CA0001 F103 ab d1 d2 cs CA00 01 F2 02 d1 d2 cs CA00 01 F3 02 d1 d2 cs CA 00 01 F4 02 d1 d2 cs CA00 01 F203 ab d1 d2 cs CA 0001 F303 qb d1 d2 cs CA00 01 F403 qb d1 d2 cs CA 00 01 F5 02 d1 d2 cs CA 00 01 F6 02 d1 d2 cs CA 00 01 F5 03 ab d1 d2 cs CA 0001 F6 03 ab d1 d2 cs Appendix B Set On Off Array CA 00 01 81 088 d1 d8 cs CA00 01 81 08 d1 d8 cs di 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 BATHERROR RESPONSES Bad Command N A CA 00 01 OF 02 01 edcs Bad Checksum N A CA 00 01 OF 02 03 ed cs ed echo back of the command byte as received v1 v2 protocol version See Read Status Table 2 limited to the range of the bath command bytes shown in bold qb qualifier byte see Table 3 d1 d2 16 bit signed integer of the value being sent or received cs the checksum of the string see text Table 2 Read Status LED bits in REQ STATUS1 byte d5 RTD1 Open Fault RTD1 Shorted Fault RTD1 Open RTD1 Shorted RTD3 Open Fault RTD3 Shorted Fault RTD3 Open RTD3 Shorted Buzzer On Alarm Muted Unit Faulted Unit Stopping Unit On Pump On Compressor On Heater On LED St
23. ds 27 kilograms RTE 10 68 pounds 31 kilograms RTE 17 71 pounds 32 kilograms RTE 740 87 pounds 39 kilograms Units should be trans ported 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 AE Section Il General Information Indicates heater status See page 17 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 MG Mute Press to mute the alarm See page 22 Digital Plus controller only Press to select ex
24. e o gt Qa o T tet e 3 E The cord set must consist of a plug cable and receptacle Milf the unit is rated greater than 12 Amps use a cord set rated for 20A Milf the unit is rated less than 12 Amps use a cord set rated for 15A E The cord set must be approved by local electrical authority or other acceptable agency MEnsure the plug is compatible with your local outlets and receptacles 24 3 c O g Lu D a ce D S c E Ly S 7 Plumbing Requirements Ensure the unit is off before connecting tubing to the unit A To prevent damage to the plumbing lines always support the fittings Drain while installing removing the pumping caps and lines Hose Connections The pump connections are located atthe rear of the pump box and are labelled gt pump outlet and pumpinlet 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 1 4 MPT for mating with standard plumbing fittings For your convenience stainless steel adapters 1 4 FPT to s O D serrated fitting are provided To assure proper fit they should be installed using 1 2 turns of Teflon tape around the threads Make sure all tubing connections are securely clamped Avoid running tubing near radiators hot water pipes etc If substa
25. e number is printed on the label located on the rear of the unit Unit Identifier Pump Reserved 271 R 7 20 Z Pump 272 R 10 99 Custom 273 R 17 274 R 740 Condenser Cooling Mode Voltage Controller 0 None 03 115 60 1 00 Digital One 1 Standard Air 11 100 50 1 100 60 1 01 Digital Plus 9 Custom 25 230 50 1 02 Digital Plus w Analog I O 10mV C 99 Custom 99 Custom These values willbe needed when calling Thermo for sales service information The controller can display the installed software version number For example for aunit with software version 082645 1A 1 Unitis running normally and displaying reservoir fluid temperature 2 Press and hold for at least 10 seconds The display will show the first two digits for example 08 3 Press 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 e o 0 3 e e d 3 Q 41 Blank Page Appendix A Fluids Water Quality Standard and Recommendations Permissible PPM Desirable PPM Microbiologicals algae bacteria
26. e 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 4 MPT for mating with standard plumbing fittings For your convenience stainless steel adapters 1 4 FPT to 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 again The LED indicates the status of the heater It illuminates to indicate the heater is on The e LED indicates the status of the refrigera tion system It illuminates to indicate the refrigera tion system is removing heat from the cooling fluid Temperature Adjustment To display the temperature setpoint press Og the controller The i 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 T
27. e reservoir fluid tempera ture 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 18 Start Up Shut Down Digital One Digital Plus Pre Start Starting Full Range Cooling Setpoint Controller 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 5 o 2 D e gt g gt a O T a le 3 Press The controller does a self test sequences through the LEDs and Digital Plus units momentarily sound the alarm then quickly displays the setpoint b
28. e 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 14 Circulating to an open container Levelling Device gt Outlet Inlet 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 5 Y 2 D le gt o Qa O Ke g le gt 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 4 gt Pump Box System 1 Bath Work Area Syst
29. e 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 time Yes off not defined or clock not set the unit will beep and lt gt Y will not enable the function The display will then indicate the reservoir fluid temperature Hold for 5 seconds If a power disruption occurs the timer mode is disabled The Timer Setup Loop will have to be used to restore the settings gt CLoc J XX XX Timer lt gt XX XX Accept All Changes 25 Si a 2 D e 3 E gt Qa o Le g9 e c g Lu D a ce D c E Ly S 0 Offset Setup Loop Digital Plus Only Offset 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 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 currenttemperature 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
30. ead 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 Isb 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 1 data byte the qualifier byte is considered a data byte d byte n n data byte Checksum Bitwise inversion ofthe 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 The checksum is the bitwise inversion of 21 command byte 00 01 20 00 21 CA 00
31. ed 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 EN610010 1 1993 EMC 89 336 EEC EN61326 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 amp Electronic Equipment WEEE Directive 2002 96 EC It is marked with the following symbol 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 After sale Support NES care Extended Warranty C
32. efore 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 gt illuminates The display 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 me 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 t
33. em 2 Bath Top View 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 15 c fe a e D c c fe E E 3 a Fluids A A Filling Requirements 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 PTFE and Ethlyene Propylene rubber EPDM Deionized up to 18 Meg ohm cm and distilled water are recommended to control corrosion and algae bloom See Water Quality Standards and Recom mendation in Appendix A Ethylene glycol propylene glycol silicone oil and filtered water are acceptable fluids
34. ep 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 gt Y 2 D e o Qa O Le le gt Temperature Offset Mode Pressing the Offset button with the bath on enable disables the temperature offset mode This mode changes the tempera ture 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 va
35. equired 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 com mands available their format and responses Controller responses are either the requested data or an error message The controller response mustbe 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 g xipuaddy During RS 485 operation the bath will wait at least 5 milliseconds after receiv ing the checksum byte before asserting its transmitter for the purpose of replying to the host Therefore when the hostis 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 a 2s T a o lt 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 L
36. er FUNCTION READ Read Acknowledge Read Status Read Internal Temperature Read External Sensor Read Setpoint control point Read Low Temperature Limit Read High Temperature Limit Read Heat Proportional Band P CA 00 01 71 00 8D Read Heat Integral 1 Read Heat Derivative D Read Cool Proportional Band P CA 00 01 74 00 84 Read Cool Integral 1 Read Cool Derivative D SET Set Setpoint control point Set Low Temperature Limit Set High Temperature Limit Set Heat Proportional Band P 0 1 99 9 Set Heat Integral 0 9 99 Set Heat Derivative D 0 5 0 Set Cool Proportional Band P 0 1 99 9 Set Cool Integral 0 9 99 Set Cool Derivative D 0 5 0 MASTER SENDS BATH RESPONDS CA 00 01 00 00 FE CA 0001 00 02 v1 v2 cs CA 00 01 09 00 F5 CA0001 0905 d1 d2 d3 d4 d5 cs CA 00 01 20 00 DE CA 00 01 2003 qb d1 d2 cs CA 00 01 21 00 DD CA 00 01 21 03 qb d1 d2 cs CA 00 01 70 00 8E CA 00 01 70 03 qb d1 d2 cs CA 00 01 40 00 BE CA 00 01 40 03 qb d1 d2 cs CA 00 01 60 00 9E CA 00 01 60 03 qb d1 d2 cs CA 0001 71 03 qb d1 d2 cs CA 00 01 72 00 8C CA 0001 7203 qb d1 d2 cs CA 00 01 73 00 8B CA 00 01 73 03 qb d1 d2 cs CA 00 01 74 03 qb d1 d2 cs CA 00 01 75 00 89 CA 0001 75 03 qb d1 d2 cs CA 00 01 76 00 88 CA 00 01 76 03 qb d1 d2 cs CA 00 01 FO 02 d1 d2 cs CA 00 01 FO 03 qb d1 d2 cs CA0001C002 d1 d2 cs CA0001C003 qb d1 d2 cs CA 00 01 EO 02
37. erceeecusdecepneseeceisspandivtseeveusbidevereeueieeeseegiens 22 Computer Setup LOOP sion ennemis ter entente 24 Timer Setup Loop sisi 25 Offset Setup LOO on 26 Analog A VO Port ODONAl ne Aanbieden A E A LERTE 27 High Temperature CULOUIS easier serinin REEE eree Eaa ieor 28 Nitrogen RUJE EEE 29 ACCOSSOMIOS nit 29 Section IV Basic Maintenance Reservoir EUA AEN 33 Reservoir Cleaning A sise 33 ANG AS tod 33 Condenser CICA MING zn een teerd ee cree eee 33 Internal Temperature Sensor rtd1 Calibration annae neen eneen veneneenen 34 External Temperature Sensor rtd2 Calibration aaneen eenn ennneneeennenn 35 Optional Analog Port Calibration Optional nnen eener nerenneeenenn 36 Section V Troubleshooting Emor COS suscrita eerste 37 External Sensor COMMGCIOR rra 38 GheCkliStz2 ize inro ete tinten A RAR Are EN AAA AR mA 39 SEVICE ASSISTANCE cti 40 PID ValUSS ye ce tase best Shi ea aa aaa a a E 40 BOM Decoder antennen edere de 41 Displaying Software Version Number nnee nereneeereneeenenneerennnen 41 Appendix A Fluids Appendix B NC Serial Communications Protocol Appendix C International Quick Reference Operating Procedures WARRANTY Compliance WEEE Compliance Unpacking Warranty Preface UL Listedto 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 defin
38. ff 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 egueuazuIen o o o Internal Temperature Sensor rdt1 Calibration Press and Hold EG Press 3 times Release Optional Display Should the bath fluid temperature display disagree with your calibrated refer ence 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 NOTE If it is more convenient the low end calibration can be performed before doing the high end Run the bath to a suitable high end calibration point Place a calibrated reference thermometer rl H AN in the bath Ensure the fluid AN temperature is stabilized Press and hold the NO button and then press the YES button three No V times Release the NO button Yes N The controller will display CAL seu Press YES and the controller will display rdt1 Press YES again and the controller will display r1 H Press
39. fungi 0 0 Inorganic Chemicals Calcium lt 25 lt 0 6 Chloride lt 25 lt 10 Magnesium lt 12 lt 0 1 Sulfate lt 25 lt 1 Total Hardness lt 17 lt 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 For example tap water in the U S averages 171 ppm of NaCl The recom mended 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 y xipuaddy RTE Compatibility with Recommended Fluids Appendix A Filtered Singled Distilled water This fluid is recommended primaril
40. goede werking moet het apparaat voldoende lucht door de condensor laten stromen Een ophoping van stof of andere deeltjes zullen het koelvermogen nadelig be nvloeden 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 Vainch 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 gt en Deze roesivrijstalen aansluitingen kunnen aangesloten worden op een s inch ID flexibele slang Verwijder de roestvrijstalen schroefdoppen indien externe circulatie gewenst is Bevestig de gt 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 hebbe
41. h viscosity fluids at low temperatures may require PID adjust ment contact Thermo Calibrate internaltemperature 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 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 P D P D Cool 0 6 0 6 0 0 Heat 06 0 6 0 0 The factory set COOL PID values for 100V and 115V RTE 740s are P D Cool 0 4 0 6 0 0 The factory set HEAT PID values for 230V RTE 740s are P D Heat 12 0 6 0 0 Thermo does not recommend changing the PID values Incorrect PID values will hamper unit performance 40 BOM Decoder Digit 1 Displaying Software Version Number Digital One Digital Plus The Bill of Material BOM number helps identify the configuration of your unit Th
42. he 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 neces sary 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 Description The NESLAB RTE Refrigerated Bath Circulators are designedto 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 la gt D 5 h e 3 3 A le Specifications RTE7 RTE 10 RTE 17 RTE 740 Temperature Range 25 C to 150 C 22 C to 150C 40 to 200 C Temperature Stability Cooling Capacity CO Ye LEA ET SE TT Heat Removal Watts A 115 60 RTE 740 unit AF B ne RTE 740 units
43. his unit Do not use automotive anti freeze Commercial antifreeze contains silicates that can damage the unit Use of automotive antifreeze may void the manufacturer s warranty Digital Plus Only jew uid 6 6829 Appendix B NC Serial Communications Protocol 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 L 2 TX 8 T 3 RX 9 T En 4 No Connection 5 Signal Ground 6 9 NoConnection To connect the bath to your computer a M F 9 pin D Subminiature extension cable will be r
44. idealvac com deal vacuum products 505 872 0037 idealvac com No part of this publication may be repro duced or reprinted except for personal use withoutthe prior permission of Thermo Electron NESLAB RTE Refrigerated Bath Thermo Manual P N U00694 Rev 07 13 05 Installation Operation Basic Service Uus Visit our Web site at http www thermo com tc Product Service Information Applications Notes MSDS Forms e mail Voice Info 800 258 0830 Table of Contents Preface Compliance rasante WEEE Compliance cuicos dated divan LITA ACKIING sese cias WartanWV ceda Atter sale SUPPOTT Hess attente nr ee E ne dinar nt nee tnt NES care Extended Warranty Contract ll E Section Safety Wai cesos dit Section Il General Information Quick Reference Operating Procedures DESENPUON ES end is SPSCHCAONS saneren Adie kee ele AA AA Sates eA Section Ill Installation and Operation KC 11 Electrical Requirements sn 12 Plumbing Requirements sise 14 CS cece eg em EE E cette 16 Filing R QUIT MENTS oia aneka ennen 17 Controller Digital One Digital PIUS nennen nennen vennverenennerenneee enn 17 Start Up Shut DOW azen RAR ikan Nn alin AD em ikan 19 Setup TUNING LOOP siii aE E teresa tea 21 Controller Digital PIUS sis cecceceevevossa
45. l 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 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 Nitrogen Purge Digital One Digital Plus Accessories Digital One Digital Plus y The autorefill accessory attaches to the rear ofthe bath The autorefill provides El makeup water to replace bath fluid lost to evaporation e
46. 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 5 72 2 D e gt o 3 Qa O Le o e gt 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 capac ity 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 tempera ture 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 11 Electrical Requirements A c Lu a fe he c 8 J 0 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
47. lue 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 c D a fe D c 8 s S 0 Computer Setup Loop Digital Plus Only Computer NOTE The Computer Setup Loopis not available ifthe serial communications mode is enabled Review change the settings before entering the mode 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 abortthem 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 com
48. munication information Koetsen Computer Fadtory pres e Raats zz A In Analog In Optional n LY See page 27 Factory preset 19200 No Vv Computer y A Yes Factory preset 1 1 to 100 RS 485 only y Computer a Yes Accept All Changes 24 XX Timer Setup Loop Digital Plus Only X Timer Timer 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 aA 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 hav
49. n 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 FORA PARTICULAR PURPOSE Thermo s OBLIGATION UNDER THIS WARRANTY IS STRICTLY AND EXCLUSIVELY LIMITED TO THE RE PAIR OR REPLACEMENT OF DEFECTIVE COMPONENT PARTS AND Thermo DOES NOT ASSUME OR AUTHORIZE ANYONE TO ASSUME FORIT ANY OTHER OBLIGATION Thermo ASSUMES NO RESPONSIBILITY FOR INCIDENTAL CONSEQUENTIAL OR OTHER DAMAGES INCLUDING BUT NOT LIMITED TO LOSS O
50. n 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 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 Operationeel gebruik Alvorens het apparaat in gebruik te nemen dient u eerst alle elektrische en slangaansluitingen te controleren Tevens dient ute controleren of het systeem gevuld is met koelvloeistof y N 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 la 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
51. nalog Port Optional Digital PI GT us Only A W 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 O 30 V gt 72 D le o gt a O T le Minimum permissible load 10uA 10mVDC Pin Function 5 1 Status relay NO Status relay pins 1 and 3 close on start up and open Z on stop and all errors z z x 2 Status relay NC Status relay pins 2 and 3 open on start up and close e OS on stop and all errors z 6 le 3 Status relay common ESA 45 Notused 6 Analog Ground The analog ground is physically separated fromthe 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 b
52. nds 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 Y 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 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 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 290 Setup Tuning Loop Digital One Digital Plus 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 FAUIt either shut down on or continue to run oFF to configure the temperature display to indicate to a tenth ora hundredth of a degree rES and to enable disable full range cooling FrC V and energy saving ESAUE modes To enter the loop you must be displaying the reservoir fluid temperature press and hold and then
53. ntial lengths of tubing are necessary insulation may be required to prevent loss of cooling capacity Tubing andinsulation 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 EA 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 Onc
54. o the fluid temperature and ignore any change 1095 lt 2 a e D Z c E ic S 0 E Low Temp Alarm High Temp Alarm Stopping To display change the low temperature alarm setting press until lle 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 ll starts to flash If an arrow button is not pressed within 10 seconas the display will return to the current reservoir temperature 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 X 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 sou
55. ontract Copyright Feedback 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 units 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 Thermo Electron Newington Nn oseon usa INN ce 800 258 0830 603 436 9444 BOM 271203200100 S N 101039026 115 VOLT 60HZ 1PH 9AMP R134A XX OZ HIGH XXX PSI LOW XXX PSIG e Extend parts and labor coverage for an additional year e Worry free operation e Control service costs e Eliminate the need to generate repair orders e No unexpected repair costs Other contract options are available Please contact Thermo for more information 2005 Thermo Electron Corp 623 2087 All rights reserved This document is for informational purposes only and is subject to change without notice We appreciate any feedback you can give us on this manual Please e mail
56. s 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 Unitl Dimensions inches c z Lu es ik Rear View Side View Unit Dimensions RTE 10 RTE 17 RTE 740 Dimension A 23 5 8 26 5 8 26 5 8 Dimension B 11 3 8 11 3 8 11 3 8 Dimension C 20 1 8 20 1 8 20 1 8 Dimension D 17 3 8 20 3 8 20 3 8 Dimension E 10 5 8 10 5 8 12 3 8 Crate Dimensions 262 x 18 x 33 Dx Wx H 10 Site A Section Ill 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
57. splay NOTE Both the high and low temperatures must be entered for a valid calibra tion 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 35 S E E Optional Analog Port Calibration Digital Plus Only Press and Hold Press 3 times Release Accept All Changes 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 The Computer button will flash when A in is enabled Use the Computer button to enable disable the analog signal 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
58. 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 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 evaluatio
59. tal Plus controller only Circuit Breaker s Power connection See page 12 1 8 OD N2 Nitrogen Purge See page 29 ef 1 4 MPT Pumping Return Connection See page 14 See page 14 lt Lu O 2 de S 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 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 gt and p These connections are angled upward so th
60. tc It will require a tap 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 reduc ing fluid evaporation Connect your nitrogen line to the N2 t s OD tube on the rear of the unit Autorefill Accessory water source A reservoir level float switch and logic signal are already installed in the bath 3 Y v D le o gt Qa fe Ke D g9 le 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 Autorefill Control Cable Attachment Cap Tube Wi Inl Tap Water Inlet Power Supply Inlet Autorefill Module 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 O he a fe Ke O Le opd 7 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 R
61. ternal 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 communication mode See page 22 Digital Plus controller only See page 14 Condenser Access Panel See page 33 ii Drain y P function See page 23 Digital Plus controller Press to select the serial Reservoir See page 16 Autorefill connection y ha 118100 Autorefill fluid connection See page 29 Cp MPT Pumping Supply Connection See Ue Press to change the displayed value See page 17 Yes la gt 5 h e 3 A e 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 ress to select the timer Indicates the controller is displaying the high temperature alarm setpoint Press the arrow buttons to change the value See page 18 only Controller See page 17 Optional External Sensor 4 Connector Digital Plus controller only High Temperature Cutout See page 28 Analog Output Connector Digital Plus controller only page 29 See page 27 RS 232 RS 485 connections See Appendix B Digi
62. 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 o internal probe temperature and the alarm will sound Press the LED Computer 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 Timer Offset 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 If the bath is turned off using with the timer mode enabled the Timer LED mm 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 be
63. y 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 by products 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
64. y 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 Not used Digital output ground reference for pin 14 Digital output ground should only be used as a reference pin 10 13 Notused 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 c O g Lu D a ce D S c E Ly S 0 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 initia
65. yton 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 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 Afterthreading the overflow assembly in as far as it goes loosen it back out until the Swagelok fitting is at the top Drain Fitting Install Install one of the two supplied 4 40 x finger tight Ya 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 Swagelok Fitting Drain Housing 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 14 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 The following accessories are also available from Thermo Stainless

Neslab RTE Refrigerated Bath

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