With Watlow 96 Controller only
Contents
1. Step Description 1 Start at 23 C 2 Go to 85 C as fast as possible 3 Soak at 85 C for 30 minutes Time will not start until temperature is within 3 C 82 C 4 Goto 0 C as fast as possible 5 Soak at 0 C for 30 minutes Time will not start until temperature is within 3 C 3 C 6 Jump back to Step 2 of this profile 1 Repeat 3 times for a total of 4 cycles 7 Go to 23 C as fast as possible 8 End with a hold at 23 C Lower Upper Lower Upper FILE 1 Step 1 FLE i Step 5 EEP EEP 5 EYP EPE EYP of H SP 23 0 Hour Hour 8 PU in 10 PA in 0 SEC SEL l LJdE 3 FILE 1 Step 2 FILE 1 Step 6 EEP e EEP 6 EYP EPE EYP Ji SP 85 0 JF i Hour a JS Pad PA in JL 3 SEL i EEP 1 Step 7 FLE i Step 3 EYP EPE EEP 3 SP 23 0 EYP of Hour FH Hour 8 PA in H PAdin 30 SEL i SEL a FILE 1 Step 8 LydE 3 EEP 8 FILE i Step 4 EYP End EEP 4 End HOLd SEYP EPE SP 0 0 Hour a PIU in H SEC I Page 4 4 TestEquity 105 Temperature Chamber Chapter 4 Temperature Controller Profile Example 2 This profile will be stored in File 2 Cycle between 50 C and 10 C Go to each temperature in 20 minutes 50 C and 10 C 60 C 20 Minutes 3 C minute2. Chapter 7 Maintenance 7 1 Preventive Maintenance Schedule 7 1 Daily or As Needed 7 1 Every 6 Months 7 1 Every 12 Months 7 1 How to clean the chamber interior and exterior 7 2 How to listen for abnormal noise or vibration 7 2 How to inspect the door seal 7 2 How to clean the condenser 7 2 How to inspect the electrical refrigeration compartment 7 3 How to verify the chamber performance 7 4 How to verify the calibration 7 5 Temperature Controller Calibration 7 6 Temperature Controller Calibration Procedure 7 6 Theory of Operation 7 7 Overview 7 7 Heating System 7 7 Refrigeration System 7 7 Troubleshooting _ 7 8 Refrigeration System Charging Instructions 7 9 R 410A Charge 7 9 Recommended Spare Parts 7 10 Major Electrical Parts 7 10 Major Refrigeration Parts 7 10 General Parts _ 7 10 Series 96 Temperature Controller Setup Parameters _ 7 11 Chapter 8 Warranty 8 1 Chapter 9 Drawings 9 1 Chapter 1 Safety Chapter 1 Safety Instructions Introduction Follow all CAUTION notices to prevent damage to the chamber or your test sample Failure to follow all CAUTION notices may void your warranty CAUTION may also indicate a potentially hazardous situation which if not avoided may result in minor or moderate personal injury WARNING indicates a potentially hazardous situation which if not avoided could result in death or serious injury The safety alert symbol A precedes a general CAUTION or WARNING s
3. Replace with MDL 3 10
4. e Valve cycling noise How to inspect the door seal The door and chamber opening have silicone gaskets to minimize thermal losses and moisture migration e Inspect the gaskets for dirt and tears e Repair minor tears with a high quality RTV silicone such as GE RTV167 e Check the integrity of the door seal by closing the door on a sheet of paper With the door closed slowly pull the paper You should feel the resistance Repeat this all around the door at several places e If the seal is not tight on the latch side adjust the latch bracket The latch bracket is mounted to the chamber and has slotted holes to permit adjustment e If the seal is not tight on the hinge side adjust the door hinge The hinges have a slotted hole on the door side to permit adjustment How to clean the condenser 1 Unplug the chamber from the power source 2 Remove the condenser grille from the front of the chamber 3 Clean the condenser fins with a vacuum cleaner NOTE You may need to clean the condenser more frequently if the chamber is in a dusty environment You may be able to clean the condenser less frequently if the chamber is in a very clean environment Page 7 2 TestEquity 105 Temperature Chamber Chapter 7 Maintenance How to inspect the electrical refrigeration compartment WARNING Wear safety goggles when inspecting the electrical refrigeration compartment to protect against a refrigerant line which could break Unplug th
5. of menus ZA CAUTION The Series 96 User s Manual is a general manual and is written by the manufacturer Watlow for a wide variety of applications and configurations Not all features or functions are applicable Only the capabilities of a model 96A0 CKDR AABB as described on page A 7 of the Series 96 User s Manual are applicable CAUTION The Series 96 Temperature Controller has been properly configured by TestEquity to match the chamber s system requirements and to perform optimally over a wide range of operating conditions Improper modifications to these setup values can result in erratic performance and unreliable operation Do not attempt to modify the setup values unless you thoroughly understand what you are doing If there is any doubt please call TestEquity before proceeding Security Features The Series 96 Temperature Controller has several levels of security to prevent unauthorized users from changing critical configuration parameters Only the Set Point Program and Operations menus are configured to Change meaning full user access is possible All other menus are configured to Read Only TestEquity does not recommend that these security levels be changed for most applications However there will be times when Change is necessary For example you may need to access to Setup Page in order to change from C to F display To change these levels of security see the Lockout Menu p
6. Pb 1 Propband 1 4 0 Due 1 Output 1 Menu rE 1 Reset 1 0 30 SEE Setup Page cA I Rate 1 0 00 DE N Output 1 heat 6 5 1 Burst 1 no CE Cycle Timei_______ 3 0 Qu t ce Output 2 Menu db _ 1 DeadBandI_ 0 0 SEE Setup Page DE 2 Output 2 cool P ide PID 2 Menu PEr Operations Page Gu 3 Output 3 Menu Pb 2 Propband2____ 5 0 C SEE Setup Page cE g Reset2 0 05 DE 3 Outputs AL rA 2 Rate2 0 0 REY Alarm Type 3 Proc be Se Burst2__ int AY Alarm Hysteresis 3 1 7 CE 2 Cycle Time2________ 10 0 LAEJ Latchinga3____________ YES db g DeadBand2_____ 0 0 5 IL 3 Silencing 3 no d3 Alarm Active Sides 3 both AL ED Alarm Menu 1 9c 3 Alarm Logic 3 __ __ALO PEr Operations Page Anu3 Alarm Annunciation 3___ YES AJL o Alarm 3 Low 42 0 AJh Alarm 3 High 105 0 opt 130 0 Due Y Output 4 Menu SEE Setup Page bAUd Baud Rate 9600 Factory Page Addr Adress Cis QL bL Global Menu Lockout Menu SEE Setup Page Factory Page n Units Type US SP Set Point Lock chng C F CorF C Program Menu Lock ___ chng Er Input Error Latching nLAT Operations Page Mode _ chng PLSP Power Limit Set Point ___ 400 0 Setup Page Lock read PL A High Power Limit Above _ 0 0 Calibration Menu Lock__ read PL b High Power Limit Below _ 100 0 PLP Open Loop Detect OFF PEYP Program Type ti TestEquity 105 Temperature Chamber Page 7 11 Chapter 8 Warrant Chapter 8 Warranty TestEquity Inc Limited Warranty TestEquity Inc Test
7. only the Temperature Controller is operational When both the TEMP and POWER Switches are ON the chamber s temperature conditioning system will function to maintain the temperature set point The TEMP Switch illuminates when it is ON Summary of Chamber Operation 1 Turn the POWER Switch ON 2 Enter the desired temperature set point on the Temperature Controller 3 Load your test sample in the chamber 4 Turn the TEMP Switch ON TestEquity 105 Temperature Chamber Page 3 1 Chapter 3 Operation Loading the Chamber A WARNING A WARNING A WARNING A WARNING A WARNING Al CAUTION Al CAUTION Do NOT put items in the chamber that could burn or explode at high temperatures This chamber uses open wire heating elements that generate surface temperatures over 1000 F This is NOT an explosion proof chamber Do NOT put items in the chamber that can emit corrosive vapors or substances This chamber is NOT a curing oven There are NO provisions for venting fumes The chamber door must remain closed while the chamber is operating If you need to open the door while the chamber is operating wear safety goggles to prevent the high velocity airflow from blowing particles or objects into your eyes This chamber operates at extreme temperatures Avoid contact with air objects and surfaces that are hot or cold to prevent severe burns or frostbite Protective gloves are recommended If your test sample is ener
8. ESI EQUITY Half Cube Model 105 Temperature Chamber Operation and Service Manual TestEquity Inc 2450 Turquoise Circle Thousand Oaks CA 91320 Support 877 512 3457 Toll Free 805 480 3697 Corporate 800 732 3457 805 498 9933 http chamber testequity com Rev 1 4 Table of Contents Chapter 1 Safety Instructions 1 1 Introduction 1 1 Installation Safety Notices 1 1 Operation Safety Notices 1 1 Chapter 2 Installation 2 1 Unpacking 2 1 Preparation For Use 2 1 Installation Location 2 1 Reversible Chamber Door 2 1 Chapter 3 Operation 3 1 Introduction 3 1 Front Panel Switches 3 1 POWER Switch 3 1 TEMP Switch 3 1 Summary of Chamber Operation _ 3 1 Loading the Chamber 3 2 Performance Considerations 3 3 Avoiding Moisture 3 3 Internal Test Fixtures 3 3 Chapter 4 Temperature Controller 4 1 Introduction__ 4 1 Security Features 4 1 Temperature Controller Keys and Displays 4 2 Static Set Point Control 4 2 Profile Control _ 43 Entering A Profile 4 3 Running A Profile 4 3 Profile Example 1 4 4 Profile Example 2 4 5 Alarm Set Points __ 4 6 Resetting an Alarm Condition 4 6 RS 232 Interface __ 4 6 GPIB Interface Optional 4 6 Chapter 5 Frequently Asked Questions 5 1 Chapter 6 Specifications 6 1 Model 105 Chamber Specifications 6 1 Series 96 Temperature Controller Specifications 6 2 _ TableotContnts______________
9. if your test sample is energized Running A Profile To select a profile press the Infinity key once The will put you in the Pre run mode and the profile mode indicator will flash Each press of the key will scroll you through the Pre run Menu Here you can select a profile and step number to start or to resume a running profile Use the O or O key to enter the desired File Step or Resume condition that you want to start running To run the profile press the key The profile mode indicator will remain ON indicating that the profile is running Hint If you only have one profile and want to start at step number one simply press the key twice You may monitor the current step condition of a running profile by pressing the key Each press of this key will scroll you through the current step parameters To end a running profile press the key once TestEquity 105 Temperature Chamber Page 4 3 Chapter 4 Temperature Controller Profile Example 1 This profile will be stored in File 1 Cycle between 85 C and 0 C Go to each temperature as fast as possible Soak at each temperature for 30 minutes Temperature must be within 3 C before the soak time will start Total number of cycles is 4 End by holding at 23 C
10. is any doubt please call TestEquity before proceeding TestEquity 105 Temperature Chamber Page 1 1 Chapter 1 Safety Al CAUTION A WARNING A WARNING A WARNING A WARNING A WARNING Al CAUTION Al CAUTION Page 1 2 Always verify that the Series 96 Temperature Controller temp alarm settings for high and low limits are set to temperatures that are appropriate for your test sample Do NOT put items in the chamber that could burn or explode at high temperatures This chamber uses open wire heating elements which generate surface temperatures over 1000 F This is NOT an explosion proof chamber Do NOT put items in the chamber that can emit corrosive vapors or substances This chamber is NOT a curing oven There are NO provisions for venting fumes The chamber door must remain closed while the chamber is operating If you need to open the door while the chamber is operating wear safety goggles to prevent the high velocity airflow from blowing particles or objects into your eyes This chamber operates at extreme temperatures Avoid contact with air objects and surfaces that are hot or cold to prevent severe burns or frostbite Protective gloves are recommended If your test sample is energized it may be capable of raising the workspace temperature beyond safe limits This could occur if your test sample exceeds the live load rating of the chamber or if the chamber s refrigeration system fails You are
11. line voltage measures no less than 110 VAC Heat is on all If temperature controller light 1 is OFF a Solid State Relay SSR1 is defective the time b Temperature controller is defective Does not cool at If temperature controller light 2 is ON a Refrigerant leak all Compressor is running b Plugged capillary tube If temperature controller light 2 is ON a Relay CR2 is defective Compressor is not running b Compressor is defective Cools too slowly If temperature controller light 2 is ON a Chamber interior is overloaded or does not cool Compressor is running b Test sample is energized giving off 6 heat down to 40 C c Port plug is not in port d Refrigerant leak e Solenoid valve SV1 may be defective in closed position f Solenoid valve SV2 may be defective in open position g Aux temperature controller TCR2 is adjusted too high or is defective Cools all the After temperature controller light 2 is ON a Relay CR2 CR3 or TM1 is defective time for more than 10 seconds Temperature If tuning PID control parameters in a Re enter values as shipped from varies more temperature controller were changed TestEquity than 0 5 C or If tuning PID control parameters in a Control parameters may need to be POT temperature controller are as shipped from changed for your unique test conditions 1 C total TestEquity If tuning PID control parameters in a Control parameters may need to be temperature controller are as shippe
12. temperature controller to accurately display a temperature measurement when compared to a standard The controller display accuracy is 0 55 C 1 LSD However the total measurement accuracy in the chamber includes the thermocouple sensor wire accuracy Thermocouple wire accuracy is 1 C or 0 75 of reading whichever is greater Therefore total system accuracy over the chamber s typical operating range is typically 1 55 C 1 LSD This is not a measurement of chamber performance Can I operate the chamber on its side No the chamber can only be operated in the upright position Operating the chamber on its side will cause permanent damage to the refrigeration system and void the warranty I m not going to use the chamber for a while Is there anything I should do to prepare it for storage Perform ALL the steps in the Preventive Maintenance Schedule before placing the chamber into storage This will ensure that the chamber will be ready to operate when it is taken out of storage If the chamber has a problem and is still under warranty these problems should be resolved before being placed into storage since the warranty period starts from the date of shipment The chamber should be stored in a conditioned environment Do not store it outside or where it will be subjected to dirt or excessive moisture I haven t used the chamber for a while Is there anything I should do to prepare it for operation Perform ALL the steps in the Pr
13. the air plenum The electrical control system will turn the compressor ON if cooling is required to maintain the temperature set point The control system will turn the compressor OFF if heat is required continuously for more than a predetermined time The system uses refrigerant R 410A High pressure liquid refrigerant is fed from the condenser through the liquid line filter drier to the capillary tubes The capillary tubes feed the finned evaporator coil which is located in the air plenum where heat is absorbed to provide cooling within the chamber The capillary tubes reduce the pressure of the refrigerant to the evaporating or low side pressure The reduction of pressure on the liquid refrigerant causes it to boil or vaporize absorbing heat which provides a cooling effect The refrigerant vapor travels through the suction line to the compressor suction inlet The compressor takes the low pressure vapor and compresses it increasing both the pressure and the temperature The hot high pressure vapor exits the compressor discharge valve and into the condenser As the high pressure vapor passes through the condenser it is cooled by a fan which blows ambient air across the finned condenser surface The vapor condenses into a liquid and the cycle is repeated The temperature controller s cool output controls the liquid line solenoid valve SV1 When SV1 is ON liquid refrigerant flows through the main capillary tube to the evaporator providing f
14. way to adjust what the temperature controller displays compared to what is measured at some point other than the controller s sensor is with the Calibration Offset parameter See page 5 3 of the Series 96 User s Manual for details Calibration verification should be performed with the Calibration Offset set to 0 0 zero Total system accuracy in the chamber includes the controller plus the thermocouple wire accuracy Total system accuracy over the chamber s operating range is typically 1 55 C 1 LSD The easiest way to verify the instrumentation accuracy is with an independent calibrated temperature sensor and display Place the sensor inside the chamber near the chamber s conditioner fan grille If the readings agree within the specified limits then no calibration adjustments are necessary TestEquity 105 Temperature Chamber Page 7 5 Chapter 7 Maintenance Temperature Controller Calibration CAUTION TestEquity does not recommend performing the controller calibration procedures unless you have verified that the controller is actually out of calibration See How to verify the calibration in the previous page before performing the Temperature Controller Calibration Procedure To calibrate the Series 96 Temperature Controller you will need to access the Factory Page This menu is configured to Read Only To change the level of security to Change see the Lockout Menu page 6 19 of
15. Control Tolerance The Temperature Controller uses a thermocouple control sensor which is located in the intake airflow within the air plenum Control tolerance is a measure of how much the temperature varies after stabilization at the control sensor It is a measure of the relative variations NOT the absolute accuracy of the readout The control tolerance specification for this chamber is 0 5 C or a total of 1 C For example the temperature set point may be 10 0 C The actual temperature varies between 9 9 C and 10 6 C This corresponds to 0 6 C and 0 1 C or a total of 0 7 C of RELATIVE variations These specifications are for an empty chamber The addition of a test sample may effect the control variations In some instances the test sample will reduce these variations TestEquity 105 Temperature Chamber Page 5 1 Chapter 5 Frequently Asked Questions Uniformity Also known as Gradients This is a measure of variations in temperature at different locations throughout the chamber interior at the same time after stabilization The uniformity specification for this chamber is 1 0 C or a total of 2 C when measured at least 2 away from the chamber interior walls These specifications are for an empty chamber The addition of a test sample may effect the temperature uniformity For example an energized test sample will produce a higher temperature near the sample Controller Accuracy This is the ability of the
16. Equity warrants Environmental Chambers Equipment manufactured by TestEquity and supplied under this contract to be free from defects in materials and workmanship under normal use and proper maintenance TestEquity will repair or replace any defective part for a period of THREE YEARS from the date of invoice TestEquity reserves the right to require any defective part be returned freight prepaid to TestEquity s factory or to inspect any defective part at the Purchaser s site TestEquity shall have sole discretion to determine whether any part is defective and whether any defective part will be repaired or replaced This limited warranty shall extend to any standard chamber accessory and component part which is normally sold by TestEquity Non standard accessories and component parts specified by the Purchaser shall be warranted only to the extent of the original manufacturer s warranty if any exists If the repair or replacement is performed in the FIRST YEAR from the date of invoice TestEquity will also pay for the labor associated with the repair at the Purchaser s site subject to TestEquity s prior approval During the SECOND and THIRD YEAR of the warranty period Purchaser will be responsible for the installation and cost of installation of replacement or repaired parts Purchaser shall notify TestEquity in writing of any alleged defect within 10 days after its discovery within the warranty period TestEquity reserves the right to satisf
17. Soak at each temperature for 1 hour Total number of cycles is 10 End by holding at 23 C Step Description 1 Start at 23 C 2 Go to 50 C in 20 minutes 3 Soak at 20 C for 1 hour 4 Goto 10 C in 20 minutes 5 Soak at 10 C for 1 hour 6 Jump back to Step 2 of this profile 2 Repeat 9 times for a total of 10 cycles 7 Go to 23 C in 20 minutes 8 End with a hold at 23 C Lower Upper Lower Upper FILE c Step 1 FILE g Step 5 EEP EEP 5 EYP EPE EYP of SP 23 0 Hour i Hour 8 PA in PA im ga SEL ga SEC l LJdE OFF FILE c Step 2 FILE g Step 6 EEP E EEP 6 EYP EPE EYP Ji SP 500 JF e Hour JS Pad PU in cu JL 9 SEC 8 EEP 7 Step 7 FILE _ ej Step3 EYP EPE EEP 3 SP 230 EYP ofH Hour FH Hour fi PA im cu PA in FH SEC SEL FILE e LuUdE OFF EEP 8 Step 8 FILE 0 Step 4 EYP End EEP 4 End HOLd SEYP EPE SP 100 Hour Pain co SEL 0 TestEquity 105 Temperature Chamber Page 4 5 Chapter 4 Temperature Controller Alarm Set Points The temperature controller has an alarm which provides
18. The Upper Display shows the actual chamber workspace temperature The Lower Display shows the desired Set Point To enter a temperature Set Point simply press the O or key to enter the desired temperature Page 4 2 TestEquity 105 Temperature Chamber Chapter 4 Temperature Controller Profile Control A profile consists of temperature set points that vary over time Profiles are entered in the Program Menu The Series 96 Controller can store two profiles with up to 8 steps in each file The files may be linked to create a single 16 step profile Profile programming details can be found in Chapter 7 of the Series 96 User s Manual References to Event Outputs Rate and Wait for Event Input are not applicable Entering A Profile To enter the Program Menu press the O Advance key Each press of the O key will scroll you through the Program Menu Use the O or O key to enter the desired value at each prompt Programming Hints e The first step in a program should be an initialization step of 1 second e The next to last step establishes a condition to end on For example you may want to end the program by holding at 23 C so this step would be to go to 23 C e TestEquity recommends having the end step type to be Hold TestEquity does NOT recommend using an end step type of Off This does not turn off the chamber fan The chamber temperature can reach 50 C just from heat generated by the fan and even higher
19. age 6 19 of the Series 96 User s Manual TestEquity 105 Temperature Chamber Page 4 1 Chapter 4 Temperature Controller Temperature Controller Keys and Displays Output Indicator Lights Indicates controller output activity 1 Heat 3 Limit Alarm 2 Cool 4 Computer Interface Activity Profile Mode 10 20 30 40 Indicator Light On if in Profile Mode Upper Display Indicates actual chamber temperature during operation or the value of the parameter in the lower display Up Key Lower Display e Changes the upper Indicates temperature set point during operation or the parameter whose value appears in the display to a higher value or moves up through a list of values e Moves from menu to upper display menu in a page e Increases the set point value in lower display Down Key e Changes the upper Advance Key Infinity Home Key oe on Advances the lower display through e Returns to the Home Page through a list of P the configuration parameters To process actual display and custom values reverse direction press and hold this toolbar key while repeatedly pressing the Up e Resets a latching alarm te aaa to key e Resets a latching input sensor error e Decreases the set point value in lower display Figure 4 1 Temperature Controller Keys and Displays Static Set Point Control The Temperature Controller is in Static Set Point mode when it is not running a profile
20. and permit moisture migration due to condensation into the insulation which will eventually impact performance and lead to premature rusting of the outer cabinet Fixtures should be constructed of stainless steel This also applies to all screws and fasteners All welds should be passivated To prevent rust and corrosion never use iron or mild steel even if it is painted or plated Aluminum may be used However since the specific heat of aluminum is double that of steel it represents a greater load and will have more impact on the chamber performance Make sure that all connectors wiring pc boards and auxiliary components can withstand the temperature extremes that they will be subjected to In some cases these components may not be able to last after repeated tests and should be considered expendable TestEquity 105 Temperature Chamber Page 3 3 Chapter 4 Temperature Controller Chapter 4 Temperature Controller Introduction This chapter provides an overview on how to operate the Series 96 Temperature Controller The Series 96 Controller provides easy single set point operation and profile programming A large LED readout indicates the actual chamber temperature with 0 1 C or F display resolution The Series 96 Controller can store two profiles with up to 8 steps in each file The built in alarm turns off all chamber functions in the event of an excess high or low temperature condition The user interface is organized into pages
21. art up installation or maintenance of the Equipment including start up installation or maintenance not in accordance with TestEquity s written procedures 3 Defects or damages resulting from or arising out of abuse misuse neglect intentional damage accident fire flood earthquake or any other act of God This warranty as to Equipment is LIMITED to repair or replacement of parts or Equipment in the determination of TestEquity Inc THE FORGOING LIMITED WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES INCLUDING THE IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE AND MERCHANTABILITY TestEquity Inc DISCLAIMS ANY LIABILITY FOR ANY DAMAGES RESULTING FROM DELAY OR LOSS OF USE IN SERVICE OR REPAIR OR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THE EQUIPMENT EXCEPT AS STATED IN THIS PARAGRAPH This limited warranty cannot be modified in any way except in writing by both TestEquity and Purchaser Invalidation of any one or more of the provisions of this limited warranty shall in no way affect any of the other provisions hereof which remain in full force and effect This limited warranty shall be extended only to the first Purchaser of this Equipment and is not transferable TestEquity 105 Temperature Chamber Page 8 1 Chapter 9 Drawings Chapter 9 Drawings TestEquity 105 Temperature Chamber Page 9 1 Electrical Subpanel Component Location e e e u gt i
22. connect the thermocouple calibrator to terminals 6 and 7 Set the type J calibrator to simulate 32 F 0 C Allow 10 seconds for the controller to stabilize 7 Set Thermocouple Calibration 32 Calibration 1 Menu tof YE 5 Press the O key to store type J thermocouple calibration and move to the next prompt 8 Rewire for operation and verify calibration Page 7 6 TestEquity 105 Temperature Chamber Chapter 7 Maintenance Theory of Operation Overview The chamber is heated by a nichrome heater Cooling is accomplished by a single stage refrigeration system The air is circulated by a propeller fan The heater evaporator and fan are located within an air plenum which is on the back wall of the chamber interior Refer to the electrical and refrigeration drawings to identify the items referenced below Heating System The chamber is heated by an open element nichrome heater HT1 The heater is located in the air plenum The temperature controller provides a time proportioned output to a solid state relay SSR1 This turns the heater on off as required to maintain the temperature set point A fusible heat limiter HL provides failsafe protection against a catastrophic failure by opening the heater circuit at 192 C Refrigeration System Cooling is accomplished by a single stage refrigeration system The refrigeration system provides cooling to the chamber interior through a finned evaporator coil which is located in
23. d DO NOT defeat the ground or polarization feature This device MUST be plugged into a properly grounded and polarized outlet CAUTION The minimum clearance you should allow for proper ventilation must be at least 12 from the rear of the chamber CAUTION This chamber is designed for operation in a conditioned laboratory environment Operation above 30 C 85 F or below 16 C 60 F ambient room temperature is NOT recommended Reversible Chamber Door The chamber door can be mounted to open from the left or right side The chamber cabinet has mounting holes on both sides for the hinges and door latch If you reverse the door see How to inspect the door seal in the Maintenance chapter of this manual to make sure the hinges and door latch are adjusted correctly TestEquity 105 Temperature Chamber Page 2 1 Chapter 3 Operation Chapter 3 Operation Introduction The Front Panel Switches control power to the temperature controller and all chamber functions The Temperature Controller controls the temperature of the chamber The Temperature Controller automatically turns the refrigeration system on or off as required based on the deviation from temperature set point Front Panel Switches POWER Switch The POWER Switch controls power to the entire chamber The POWER Switch illuminates when it is ON TEMP Switch The TEMP Switch enables all chamber functions When the TEMP Switch is OFF and the Power Switch is ON
24. d from changed for your unique test conditions TestEquity and only occurs in cool mode b Solenoid valve SV1 may be defective in open position Compressors If control parameters in temperature a Re enter values as shipped from turn on and off controller were changed TestEquity too frequently If control parameters in temperature a Control parameters may need to be i controller are as shipped from TestEquity changed for your unique test conditions b Time delay relay TM1 setting may need to be changed for your unique test conditions or may be defective c Solenoid valve SV1 may be defective in open position Page 7 8 TestEquity 105 Temperature Chamber Chapter 7 Maintenance Refrigeration System Charging Instructions WARNING Repair of the refrigeration system must be performed only by a properly trained mechanic Do NOT substitute any component Do NOT substitute refrigerants Improper repairs will void the warranty These instructions are intended as guidelines for repairing TestEquity chambers Details such as how to attach a gauge manifold are not covered These are NOT do it yourself instructions R 410A Charge The proper charging procedure is as follows 1 Repair any leaks before recharging Replace the filter drier 2 Evacuate the system to 100 microns DO NOT GUESS You must use a micron gauge 3 Use a charging scale to weigh in 5 5 ounces of R 410A DO NOT GUESS You must use a charging scal
25. e This is a critically charged system 4 Verify the cooling performance as outlined in How to verify the chamber performance TestEquity 105 Temperature Chamber Page 7 9 Chapter 7 Maintenance Recommended Spare Parts Replacement parts are available from TestEquity Parts are generally in stock and ready for immediate shipment Next day delivery is always available If you cannot risk being out of service for even one day then you should purchase critical spare parts in advance Although most parts are standard and available from a variety of local distributors some parts are either harder to find or custom The following is a list of the kinds of parts that you may want to purchase in advance Electrical Parts Temperature Controller Relays Fuse Heat Limiter Circulator Motor and Fan Switch Refrigeration Parts Solenoid Valve Capillary Tube Expansion Valve Condensing Unit Major Electrical Parts Description Mfr Mfr Part No Ref Part Qty UOM Arc Suppressor ITW Paktron 104M06QC100 AS1 AS2 200115 2 ea Circulator Motor Fasco D215 FM1 200133 1 ea Fuse 3 10A Bussman MDL 3 10 Fl 200130 1 ea Heater Air CUSTOM CUSTOM HTI 200132 1 ea Line Cord 14 3 SJT Carol W1950 70 01 200135 1 ea Relay DPDT Tyco P amp B T92P11A22 120 CR1 CR2 200128 1 ea Relay SPDT Omron G2R 1 T AC120 CR3 CR4 200160 2 ea Relay Time Delay NCC Q1T 00010 341 TM1 200149 1 ea Solid State Re
26. e power cord Remove the top cover Inspect for signs of refrigeration tubing abrasion Inspect for signs of deterioration of foam insulation around refrigeration tubing Inspect for oil around refrigeration valves fittings and joints This may be a sign of leaks Inspect for loose hardware and tighten as required Check for loose wires and burned insulation near terminals Pon ey ae ee A Inspect for signs of insect or rodent infestation Yes it does happen TestEquity 105 Temperature Chamber Page 7 3 Chapter 7 Maintenance How to verify the chamber performance These tests verify the performance of the heating refrigeration electrical controls temperature controller and air circulation systems The chamber should meet all published performance specifications if all of these tests are successfully passed These tests assume that the Temperature Controller s setup and tuning values have not been changed from the values as shipped from TestEquity Also the Controller high limit must be set to over 85 C 88 C would be fine and the low limit set to 42 C If the chamber fails any of these tests it should be removed from service to prevent further damage until the cause of the problem is determined and resolved 1 The chamber interior should be empty and at ambient temperature approximately 23 C 2 Plug the chamber into a 120 VAC outlet Turn the POWER Switch ON and the TEMP Switch OFF 3 Set the Temperature Co
27. er End Temp Start Temp to gt 23 C 0C 10 C 20 C 30 C 35 C 40 C 423 C e 3 min 5 min 7min 10min 13min 22 min 85 C 8 min 13 min 15 min 17min 20min 23min 31 min Heat Up Transition Time empty chamber End Temp Start Temp to gt 23 C 50 C 85 C 423 C ween 1 5 min 6 min 0 C 2 min 4min 7 5 min 20 C 3 min 5 min 8 min 40 C 45min 75min 11min Note Transition times are measured after a 30 minute soak at the start temperature To calculate rate of change for a particular condition take the difference between the Start Temp and End Temp and divide by the Transition Time Cool Down Example empty From 85 C to 20 C 105 C 17 min 6 18 C min Heat Up Example empty From 40 C to 85 C 125 C 11 min 11 36 C min Power Requirements Input Voltage standard Current Draw Workspace Dimensions Outside Dimensions Min Installed Clearance Access Ports Weight 120 VAC nominal 110 to 126 VAC Single Phase 60 Hz 10 A maximum Recommended Service 15 A 12 W x9 Hx 8 D 0 5 cubic feet 16 5 W x 25 H x 20 D nominal Door latch adds 2 to width Circulator motor housing adds 2 to depth in rear 12 from the rear 2 Port on left and right side two total Supplied with foam plugs 114 pounds NOTE Performance is typical and based on operation at 23 C 73 F ambient and nominal input voltage Designed for use in a normal conditioned laboratory Operation at higher ambient temperatures will re
28. eventive Maintenance Schedule before placing the chamber back into service This will ensure that nothing has been damaged and that a leak has not developed Can Should I put a filter in front of the condenser air inlet No TestEquity does not recommend this Just follow the maintenance procedures and clean the condenser fins periodically How often should I charge the refrigeration system This chamber uses a closed loop refrigeration system Just like your refrigerator at home it does not need periodic charging If the charge is low this means that there is a leak Leaks should be repaired before recharging What kind of Freon does the chamber use The word Freon is a DuPont registered trade name for their CFC based refrigerants and is incorrectly used as a generic term for refrigerants TestEquity chambers do not use CFC based refrigerants The system uses R 410A which is also known as DuPont Suva 410A Page 5 2 TestEquity 105 001 Temperature Chamber Chapter 6 Specifications Chapter 6 Specifications Model 105 Chamber Specifications 40 C to 100 C optional to 130 C 0 5 C 0 2 C Typical Measured at the control sensor after stabilization Temperature Range Control Tolerance Uniformity 1 0 C 0 5 C Typical Variations throughout the chamber after stabilization Live Load Capacity 23 C 0 C 10 C 20 C 30 C 40 C Watts 200 W 175W 165W 145 W 90 W 10 W Cool Down Transition Time empty chamb
29. gized it may be capable of raising the workspace temperature beyond safe limits This could occur if your test sample exceeds the live load rating of the chamber or if the chamber s refrigeration system fails To prevent damage to your test sample and the chamber s compressor do not exceed the live load rating of the chamber Live Load Capacity for Model 105 Temp 23 C 0 C 10 C 20 C 30 C 40 C Watts 200 W 175 W 165 W 145 W 90 W 10 W Page 3 2 TestEquity 105 Temperature Chamber Chapter 3 Operation Performance Considerations The performance of all chambers are significantly effected by the characteristics of your test sample Factors include size weight material shape and power dissipation if energized The test sample should be placed in the chamber in a manner that allows for air circulation The air plenum is located on the back wall of the chamber where air is sucked in from the bottom and exits from the top You should not place the test sample directly on the chamber floor It should be placed on the shelf Multiple test samples should be distributed throughout the chamber to ensure even airflow and minimize temperature gradients If necessary an additional shelf should be used to evenly distribute the load Verify that the temperature gradients are within acceptable limits by measuring the chamber temperature at strategic points using a multipoint thermocouple meter or datalogge
30. lay 10A Omron G3NE 210T US DC24 SSRI 200177 1 ea Switch SPST Rocker Carlingswitch LRA211 RA B 125N SWI 2 200023 2 ea Temperature Controller Watlow 96A0 CKDR AABB TCR1 200127 1 ea Temperature Controller Aux Athena 88 A A T59 TCR2 200161 1 ea Major Refrigeration Parts Description Mfr Mfr Part No Ref Part Qty UOM Accumulator CUSTOM CUSTOM 9 100313 1 ea Capillary Tube 0 031 x 9 ft JB TC 31 5 6 100320 2 ea Condensing Unit Copeland M4FL 0033 IAA 017 1 100308 1 ea Evaporator Coil CUSTOM CUSTOM 7 100309 1 ea Expansion Valve Suction Cooling Danfoss 068U2027 8 100314 1 ea Filter Drier Sporlan C 032 S 2 100312 1 ea Solenoid Valve Sporlan E3S123 1 4 x 1 4 ODM 3 100310 2 ea Solenoid Valve Coil Sporlan MKC 1 120 50 60 4 SV1 2 100011 2 ea General Parts Description Mfr Mfr Part No Ref Part Qty UOM Door Latch Chamber Workspace _ Southco A7 10 301 20 300216 1 ea Fan Alum CCW CUSTOM CUSTOM 300218 1 ea Gasket Chamber Side CUSTOM CUSTOM Specify if for 130 C 1 ea Gasket Door Side CUSTOM CUSTOM Specify if for 130 C 1 ea Port Plug Foam 2 for 100 C CUSTOM CUSTOM 300222 2 ea Port Plug Silicone 2 for 130 C CUSTOM CUSTOM 300419 2 ea Shelf CUSTOM 300217 TE 1051 1 ea Page 7 10 TestEquity 105 Temperature Chamber Chapter 7 Maintenance Series 96 Temperature C
31. ler Set Point to 23 0 C The chamber should begin to heat up The compressor should turn off 16 This concludes the chamber performance verification tests 17 Let the chamber heat up to 23 C before turning the TEMP Switch OFF To prevent condensation inside the chamber is always a good idea NOT to turn the chamber off while it is still cold Page 7 4 TestEquity 105 Temperature Chamber Chapter 7 Maintenance How to verify the calibration CAUTION TestEquity does not recommend performing the controller calibration procedures unless you have verified that the controller is actually out of calibration TestEquity recommends verifying the calibration before attempting to actually perform a calibration The microprocessor based instrumentation used in TestEquity chambers seldom goes out of calibration If you try to calibrate the instrumentation before determining that calibration is necessary you may make it worse if done incorrectly Variations in temperature throughout the chamber interior are NOT a measurement of accuracy These variations called gradients are a function of the physical design of the chamber and its airflow the characteristics of the test sample and how it is oriented in the chamber You cannot calibrate to improve gradients The common practice of measuring multiple points in the chamber and adjusting the temperature controller s calibration to correct for these errors is incorrect The correct
32. ntroller Set Point to 85 0 C and turn the TEMP Switch ON 4 The Temperature Controller s 1 light should be ON continuously and the 2 light should be OFF 5 The chamber should heat up to about 80 C and begin controlling 1 light cycles ON OFF within 5 minutes 6 The chamber temperature should slowly increase and stabilize to 85 0 C It should NOT overshoot beyond 85 0 C by more than 1 0 C and the compressor should NOT need to turn ON in order to maintain 85 0 C 7 After stabilization the chamber temperature should vary no more than 0 5 C or a total of 1 C 8 Let the chamber stay at 85 C for 30 minutes 9 After 30 minutes at 85 C set the Temperature Controller Set Point to 20 0 C 10 The Temperature Controller s 2 light should turn ON The compressor should also turn ON 11 The chamber should cool down to about 15 C and begin controlling 2 light cycles ON OFF within approximately 15 minutes 12 The 2 light will ultimately remain OFF and the 1 light should cycle ON OFF while maintaining 20 0 C It should NOT undershoot beyond 20 0 C by more than 1 0 C and the compressor should NOT need to turn OFF in order to maintain 20 0 C 13 After stabilization the chamber temperature should vary no more than 0 5 C or a total of 1 C 14 Set the Temperature Controller Set Point to 40 0 C The chamber should reach 40 0 C within approximately 14 minutes 15 Set the Temperature Control
33. odify the chamber to cool faster or colder Unfortunately there is nothing you can do to improve upon the designed in performance TestEquity does NOT recommend using CO2 or LN2 in this chamber to achieve colder or faster cooling due to reliability and safety considerations so it is NOT an available option Modifying the chamber to add CO2 or LN2 will permanently damage the chamber and void the warranty Why is there water ice snow in the chamber Any time the ambient air is subjected to temperatures below the dewpoint moisture will condense out of the air The effect is ice or frost during low temperature operation When the chamber is heated above 0 C the ice or frost will turn into water To avoid moisture condensation make sure the port plugs are inserted at all times Also avoid opening the chamber door while the chamber is operating at temperatures below room ambient When a low temperature test is completed warm the chamber to at least room ambient before opening the chamber door and before removing your test sample My test specification requires convection heat only Can I turn the circulator motor off NO This will damage the heating and refrigeration systems and void the warranty You need a gravity convection oven for that kind of test How accurate is the chamber That s a loaded question There is no chamber accuracy specification as such The answer requires an understanding of several performance parameters
34. ommodate a null modem cable To communicate with the controller from a PC you need to run software that uses the Modbus RTU protocol Modbus programming register numbers are on page A 3 of the Series 96 User s Manual RS 232C programming resources can be downloaded from http chamber testequity com rs232 html GPIB Interface Optional The optional GPIB interface consists of an external converter box that connects to the chamber s RS 232C interface GPIB programming resources can be downloaded from http chamber testequity com gpib html Page 4 6 TestEquity 105 Temperature Chamber Chapter 5 Frequently Asked Questions Chapter 5 Frequently Asked Questions Why does my chamber heat or cool slower than the published specifications You can determine if the chamber is operating properly by following the procedure in How to verify the chamber performance Performance is significantly effected by the characteristics of your test sample Factors include size weight material shape and power dissipation if energized The test sample should be placed in the chamber in a manner that allows for air circulation You should not place the test sample directly on the chamber floor It should be placed on the shelf Multiple test samples should be distributed throughout the chamber to ensure even airflow and minimize temperature gradients If necessary an additional shelf should be used to evenly distribute the load How can I m
35. ontroller Setup Parameters For more detailed instructions see the Series 96 User s Manual Z CAUTION The Series 96 User s Manual is a general manual and is written by the manufacturer Watlow for a wide variety of applications and configurations Not all features or functions are applicable Only the capabilities of a model 96A0 CKDR AABB as described on page A 7 of the Series 96 User s Manual are applicable CAUTION The Series 96 Temperature Controller has been properly configured by TestEquity to match the chamber s system requirements and to perform optimally over a wide range of operating conditions Improper modifications to these setup values can result in erratic performance and unreliable operation Do not attempt to modify the setup values unless you thoroughly understand what you are doing If there is any doubt please call TestEquity before proceeding Setup Page Operations Page ImP 1 Input 1 Menu US Er User Menu SEE Setup Page OPEr Operations Page En I Sensor Type tc Aut Auto tune OFF ta I Input Type 1 t RESP Auto tune Set Point 90 cl I Range Low 1 41 0 CAL I Calibration Offset 0 0 ch 1 Range High 1 105 0 opt 130 0 dEC I Decimal 1 0 0 P Id PID 1 Menu FEr 1 Input Software Filter 1___1 0 PEr Operations Page
36. protection against an excess high or low temperature condition If the high or low limits are exceeded the controller will turn off all chamber functions heating cooling and fan The Alarm values are set in the Operations Page To change the Alarm values 1 Press the O AND key simultaneously for 3 seconds until you see in the lower display 2 Press the O or key until you see AL P 9 in the upper display It may already be at this prompt 3 Press the key once You will see in the lower display This is the Low Temperature Limit 4 Press the O or key adjust the Low Temperature Limit as required It should be set at least 5 C lower than the lowest temperature you will be operating but not lower than 42 C 5 Press the key once You will see in the lower display This is the High Temperature Limit 6 Press the O or O key adjust the High Temperature Limit as required It should be set at least 5 C higher than the highest temperature you will be operating but not higher than 105 C 7 Press the key once to return to the Home Page Resetting an Alarm Condition In an alarm condition the upper display will alternately flash between and low temperature limit or high temperature limit An alarm condition thas has been corrected can be reset by pressing the key once RS 232 Interface The Temperature Controller has an RS 232C interface A DB 9 connector is located on the rear panel It is wired to acc
37. r You may find that the temperature throughout the chamber is even but always different from what the temperature controller indicates The correct way to adjust what the temperature controller displays compared to what is measured at some point other than the controller s sensor is with the Calibration Offset parameter See page 5 2 of the Series 96 User s Manual for details Avoiding Moisture Any time the ambient air is subjected to temperatures below the dewpoint moisture will condense out of the air The effect is ice or frost during low temperature operation When the chamber is heated above 0 C the ice or frost will turn into water To avoid moisture condensation make sure the port plugs are inserted at all times Also avoid opening the chamber door while the chamber is operating at temperatures below room ambient When a low temperature test is completed warm the chamber to at least room ambient before opening the chamber door and before removing your test sample Internal Test Fixtures Some applications require internal fixtures to support test samples and provide a convenient method of connecting wires and sensors Fixtures must be designed to minimize their impact on chamber functionality and performance Fixtures should be designed for easy removal to permit maintenance and cleaning of the chamber The chamber liner should never be drilled or screwed into This will compromise the integrity of the liner
38. r e Listen for abnormal noise or vibration Every 6 Months e Inspect the door seal e Clean the condenser e Inspect the electrical refrigeration compartment e Verify the chamber performance Every 12 Months e Verify the calibration TestEquity 105 Temperature Chamber Page 7 1 Chapter 7 Maintenance How to clean the chamber interior and exterior e Wipe or vacuum out all debris e Clean surfaces with a damp cloth mild detergent or stainless steel cleaner Avoid cleaners that are abrasive or leave a residue NEVER use steel wool e If you clean the interior with something other than water you may want to operate the chamber at high temperature approximately 85 C after cleaning This helps to bake out any residue Remove the port plugs to permit the residual vapors to escape e Clean the silicone door gaskets with a damp cloth or mild detergent e Clean the exterior painted surfaces with a damp cloth or mild detergent If you are using a detergent test a small inconspicuous area to make sure it does not damage the finish How to listen for abnormal noise or vibration You should become familiar with normal operating noises Being able to recognize changes from normal operating noises can be a valuable way to identify problems and prevent further damage Examples of noises to be aware of include e Circulator motor noise with compressor off e Compressor start up and running noise e Condenser fan noise
39. responsible for providing thermal protection devices to your test sample To prevent damage to your test sample and the chamber s compressor do not exceed the live load rating of the chamber TestEquity 105 Temperature Chamber Chapter 2 Installation Chapter 2 Installation Unpacking Inspect the shipping container for any signs of visible damage Notify the carrier and TestEquity immediately if there are signs of shipping damage 1 Cut the bands that hold the packaging together 2 Remove the top cover and top foam inserts 3 Remove the outer box 4 Carefully lift the chamber off the pallet This should be done with at least two people Preparation For Use Inspect the chamber for signs of shipping damage Read this entire manual Select a suitable location to install the chamber Connect to a 120 VAC 60 Hz power source with a minimum 15 Amp breaker AP eee u Perform following the procedure How to verify the chamber performance in the Maintenance chapter of this manual to make sure that no damage has occurred in shipment Installation Location The chamber will produce a moderate amount of heat during normal operation Locate the chamber in an area with adequate ventilation to prevent excessive heat build up The chamber must be on a solid and level surface that is rated to hold at least 100 pounds WARNING The power cord is equipped with a NEMA 5 15P grounded polarized plug To prevent a shock hazar
40. sult in decreased cooling performance Low end limit derates to 38 C when operating above 27 C 80 F ambient Operation above 30 C 85 F or below 16 C 60 F ambient is not recommended TestEquity 105 Temperature Chamber Page 6 1 Chapter 6 Specifications Series 96 Temperature Controller Specifications Specifications as configured for the TestEquity Model 105 Chamber Accuracy amp Sensor Conformity 0 55 C 1 LSD with type T thermocouple input Stability 0 1 C C rise in ambient Communications RS 232C serial communications with Modbus RTU protocol Safety amp Agency Approvals UL916 listed File E185611 c UL NEMA 4X CE EMC and LVD Displays Process 4 seven segment red LED 0 4 H Interface Display 4 seven segment green LED 0 244 H Selectable C or F Alarm User adjustable temperature limits Turns off chamber if high or low limits are exceeded Data Retention Retention upon power failure via nonvolatile memory seven years for battery backed RAM Note Total system accuracy in the chamber includes thermocouple wire accuracy Thermocouple wire accuracy is 1 C or 0 75 of reading whichever is greater Therefore total system accuracy over the chamber s operating range is typically 1 55 C 1 LSD Page 6 2 TestEquity 105 Temperature Chamber Chapter 7 Maintenance Chapter 7 Maintenance Preventive Maintenance Schedule Daily or As Needed e Clean chamber interior and exterio
41. tatement The electrical hazard symbol A precedes an electric shock hazard CAUTION or WARNING statement Installation Safety Notices AA WARNING The power cord is equipped with a NEMA 5 15P grounded polarized plug To prevent a shock hazard DO NOT defeat the ground or polarization feature This device MUST be plugged into a properly grounded and polarized outlet CAUTION The minimum clearance you should allow for proper ventilation must be at least 12 from the rear of the chamber CAUTION This chamber is designed for operation in a conditioned laboratory environment Operation above 30 C 85 F or below 16 C 60 F ambient room temperature is NOT recommended Operation Safety Notices ZA CAUTION The Series 96 User s Manual is a general manual and is written by the manufacturer Watlow for a wide variety of applications and configurations Not all features or functions are applicable Only the capabilities of a model 96A0 CKDR AABB as described on page A 7 of the Series 96 User s Manual are applicable ZA CAUTION The Series 96 Temperature Controller has been properly configured by TestEquity to match the chamber s system requirements and to perform optimally over a wide range of operating conditions Improper modifications to these setup values can result in erratic performance and unreliable operation Do not attempt to modify the setup values unless you thoroughly understand what you are doing If there
42. the Series 96 User s Manual Note that the temperature chamber uses a type T thermocouple and the controller is normally configured as such However the calibration menu and procedure requires a type J calibrator Temperature Controller Calibration Procedure Warm up the unit for 20 minutes To enter a calibration menu enter the Factory Page by holding down the AND keys for six seconds Once in the Factory Page use the the O or Y keys to select the Calibration 1 Menu e in fl You can restore the original factory calibration with Restore Factory Calibration Calibration 1 Menu or revert to the default parameter range selections with Default Settings dF L E Calibration 1 Menu Equipment Required e Type J thermocouple calibrator to 32 F 0 C e Precision millivolt source 0 to 50 mV minimum range 0 002 mV resolution Setup and Calibration 1 Connect the millivolt source to the controller terminals 6 and 7 with copper wire 2 Enter 50 000 mV from the millivolt source Allow at least 10 seconds to stabilize 3 Set Thermocouple Calibration 5 0mV Calibration 1 Menu to YES Press the key to store 50 000 mV input and move to the next prompt 4 Enter 0 000 mV from the millivolt source Allow at least 10 seconds to stabilize 5 Set Thermocouple Calibration OmV Calibration 1 Menu to YE amp S Press the O key to store 0 000 mV input and move to the next prompt 6 Disconnect the millivolt source and
43. ull capacity cooling When SV1 is OFF liquid refrigerant flows through a restriction capillary tube before the main capillary tube providing reduced capacity cooling The temperature set point is ultimately controlled by cycling heat against the reduced capacity cooling as long as the compressor remains ON The suction cooling expansion valve senses the suction line temperature and injects liquid refrigerant to cool the return gas within safe limits At low chamber temperatures aux temperature controller TCR2 disables the suction cooling expansion valve through SV2 while locking SV1 ON regardless of temperature controller s cool output status TestEquity 105 Temperature Chamber Page 7 7 Chapter 7 Maintenance Troubleshooting SYMPTOM CONDITION POSSIBLE CAUSES Chamber does If POWER and TEMP switches are ON a Relay CRI is defective not function temperature controller light 4 is OFF If POWER and TEMP switches are ON a Chamber temperature has exceeded the temperature controller light 4 is ON Alarm limits Does not heat If controller light 1 is ON circulator fan is a The Heat Limiter HL is open up at all ON b The Heater HTI is open c Solid State Relay SSR1 is defective d Temperature controller is defective Heats up too If temperature controller light 1 is ON a Chamber interior is overloaded slow Compressor is not running b Port plug is not in port c Verify that input
44. y the labor portion of this limited warranty either through its own service personnel or an authorized agent In order to provide expeditious service TestEquity reserves the right to satisfy its limited warranty obligation by sending replacement parts to be installed by the Purchaser if they can be installed easily without special tools or training TestEquity reserves the right to satisfy this limited warranty by requiring the Purchaser to return the Equipment to TestEquity when such return is feasible The following parts are excluded from this limited warranty and are sold as is or are considered expendable interior light bulb viewing window paint and cosmetic surface finishes and treatments and port plugs Refrigerant costs are covered in the FIRST YEAR only This limited warranty shall extend in full to Equipment installed within continental United States and Canada For all other locations Purchaser is responsible for all labor costs for repairs or parts installation and for all shipping costs associated with providing replacement parts This limited warranty does not cover 1 Defects or damages arising as the result of shipment by common carriers or private transportation unless TestEquity undertakes shipment and transportation of the Equipment to Purchaser s site or contractually assumes the risk of damage to the Equipment in shipment 2 Defects or damages arising out of or as the result of mishandling modification or improper st
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