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CONTROLLED ENVIRONMENT CHAMBER

1. Cleaning Cooling System Nozzle Orifice Before performing any service the pressurized CO must be bled from the system Refer to Section 4 2 1 4 47 Clearing a clogged Cooling Nozzle Occasionally the Cooling Nozzle shown in Figure 8 0 2 may become clogged due to impurities in the CO small pieces of dirt or small pieces of Teflon sealing tape breaking free and lodging in the nozzle Figure 8 0 1 Cooling nozzle orifice Item 2 the Cooling Nozzle Cleaning Tool is provided to help clear such blockages If the nozzle is extremely clogged it may be necessary to completely remove the nozzle clear the orifice and reinstall it If the system is not producing a cooling effect after clearing the nozzle make sure the CO tank is full and the manual valve is fully open If the valve does not fully close when the system is turned OFF a small piece of dirt etc may have lodged in the valve seal The valve may be taken apart to inspect the seal Remove AC Power from the unit Remove the solenoid from the valve stem Using a wrench carefully unscrew the valve stem from the upper portion of the valve bogy The stem contains a plunger with a round red seal on the top Make sure the seal is clean and free of debris Also check the valve internally for obstructions After cleaning carefully replace the Valve Stem and Solenoid For help with any other problems please contact ETS 3 07 48 9 0
2. 3 2 Controller Operation 3 2 1 Set Point Adjust 1 2 3 Press and hold the button The letters rh will appear followed by the current set point value While holding the button the current set point value and rh will alternately appear in the microprocessor display To adjust the set point higher press the button To adjust the set point lower press the Y button Release the button 3 2 2 Humidification System To operate the Model 5518 Humidification System 1 2 3 Read the Humidifier operating instructions Plug the Humidifier into the HUMIDIFY outlet on the Side Interface Panel Adjust the RH set point to a value above the ambient RH conditions Turn on the RH INCREASE switch on the Model 5518 Front Panel This will not automatically apply power to the Humidifier Turning on the RH INCREASE switch only makes the HUMIDIFY outlet available to the microprocessor controller When the controller activates the outlet the small green LED in the upper left corner of the RH display will illuminate The humidifier will activate and begin pushing a fine water mist into the chamber The controller will determine the amount of humidification needed to maintain the desired set point in the chamber If less than the full output capacity of the humidifier is needed the controller will provide pulses of power to the unit to limit the output The humi
3. Tune attempts will generally result in a successful Tune bAnd 10 0 Proportional Band for humidifier int t 0 5 Integral Time in minutes The integral time is responsible for calculating how much output should be coming from the humidifying and dehumidifying systems to maintain the desired conditions der t 2 0 Derivative Time in seconds The derivative time in combination with the dAC is responsible for keeping the environment moving toward the set point following a pre determined curve set by the dAC in combination with the bAnd The curve is followed to help avoid set point overshoots Shortening the derivative time will cause the controller to recover slowly from disturbances Lengthening the derivative time may cause oscillations dAC 1 0 Recommended The Derivative Approach Control determines how guickly the unit will reach the set point without overshooting The dAC creates a gently sloping exponential curve that the system must follow when approaching the set point The smaller the number the guicker the unit will allow the set point to be reached The dAC multiplied by the band determines where the beginning 25 of the approach curve will be located A larger dAC setting will cause the beginning of the dAC curve to be further away from the set point The larger setting will control overshoots better but will cause responses to disturbances to be slower CYC t 2 0 Recommended Cycle
4. F Cooling Systems The Model 5518 Chamber includes the ETS Model 5463 Liquid Carbon Dioxide Cooling System as a standard feature Other cooling options include ETS Model 5473 150 510BTU hr Thermoelectric cooling System ETS Model 5466 Liquid Nitrogen Cooling System 4 2 1 Model 5463 Liquid CO Cooling System The Liquid CO Cooling System is already installed onto the Model 5518 Chamber The Solenoid Control Valve is wired into the PC Board which is controlled by the microprocessor temperature controller All the user needs to do 30 is connect the Transfer Hose to the appropriate liquid CO cylinder with dip tube NOTE CO gas will not work The Gas Cooling System enables the temperature within the Model 5518 Chamber to be reduced below freezing 32 F 0 C 1 The System utilizes Liquid CO gt Carbon Dioxide as the cooling medium CO is user supplied 50lb CO tanks are readily available from local bottled gas companies NOTE Liquid CO with a Dip Tube must be specified The DIP Tube allows liquid to be siphoned from the bottom of the tank CO Gas without DIP Tube will not provide cooling with this system The CO is allowed to evaporate expand from a liquid to a gas within the chamber The phase change of the CO produces a large cooling effect The temperature directly in front of the nozzle will be near 100 F The microprocessor temperature controller will monitor the chamb
5. SPAN adjustment pot on the Sensor Interface Board is far more accurate than this microprocessor setting ZEro 0 0 Do Not Change Zero sensor error see SPAn 28 3 3 6 NOTE The Model 5518 Sensor Interface Board includes an internal ZERO adjustment pot that is far more accurate than the microprocessor setting PERFORMANCE DATA ChEK oFF Select control accuracy monitor rEAD Var Read control accuracy monitor TECH Ct A Read Autotune cycle data Using the Autotune function is not recommended VEr software version rSEt none Do Not Change f the unit is reset all programmed information will be lost Each parameter must be re entered manually LEVL 4 Level 4 Level 4 is a hidden level This allows locked functions to be inaccessible to any unauthorized user Access to Level 4 is gained through VEr in Level 3 Press and hold and Y for ten seconds Enter Level 4 at LoCK release and Y together LoCK LEV 2 Select from three lock options LEV 3 Locks Level 3 and 4 only Technical Functions LEV 2 Locks Levels 2 3 and 4 only Configuration and Technical Functions ALL Locks all functions unrestricted LEVL VEr dAtA SP LK Note Locked functions and options may be read ProG Auto Program mode auto exit switch Auto exit returns display to normal if 60 seconds of key inactivity select StAy to disable no AL oFF Disable SP2 alarm
6. of indicating calcium sulfate CaSO in a clear plastic column located outside the chamber and 5 16 I D tubing to interface the drying column with the pump The tubing connects to the chamber through the quick connect fittings on the right side of the Chamber The desiccant column may be placed on top of or next to the Chamber 2 2 1 2 The air pump is internally connected to the humidity controller All the user needs to do is connect the desiccant column into the system using the provided 5 16 ID Tubing The desiccant removes moisture from the air This dried air is then forced back into the chamber working space The desiccant contains an indicator that turns the normally blue colored desiccant pink as it absorbs moisture When the cylinder is mostly pink the desiccant should be renewed or replaced A 2 5 lb desiccant column is available as an option or multiple 1 Ib columns can be connected in series This will extend the time between desiccant changes but will reduce the air flow thereby increasing the drying time Unit Specifications 1 Average air flow rate 0 67 cfm 19 Ipm 2 Air dried to a dewpoint of 100 F 3 Capacity for water vapor 100 grams max 4 Power 115 VAC 60 Hz 1 1 Amps 230 VAC 50 Hz 0 6 Amps e Desiccant Column working pressure 90 psig max 6 Contents 1 Ib of 8 mesh CaSO Indicating Desiccant 7 All connections are made using 5 16 ID tubing 1 4 ID x 5 16 OD hose ba
7. off when only humidification is needed and vice versa Doubling bnd 2 helps prevent flip flopping around the set point CyC 2 1 0 Recommended Cycle time means how often the unit can potentially be turned on and then off in succession The ETS Model 5461 Dehumidifier may be safely turned on and off once a second but the pump will be excessively noisy DO NOT DECREASE THE CYCLE TIME BELOW 1 0 SECOND when operating this system ETS Model 5478 Self Regenerating Dehumidification System solenoid valve CyC 2 may be set as low as 0 5 second but short times will accelerate valve wear The recommended Cycle Time is 5 0 seconds To extend the life of the internal solenoid valve the cycle time may be increased but control may suffer 26 3 3 4 If using any other dehumidification system determine the minimum cycle time at which the unit can safely operate consult the manufacturer s instructions for the unit NOTE All functions in Level 2 3 amp 4 are locked and may not be altered unless unlocked See section 2 4 5 Level 4 LEVL 2 Level 2 Level 2 is the controller configuration level The controller is capable of being configured in an unlimited number of ways However the parameters needed to control the Humidity Operating Systems with the ETS Model 554 Humidity Sensor are programmed and locked MANUAL CONTROL MODES SP1 P Read SP1 output percentage power Read only hAnd off SP1 Manual percenta
8. persists contact ETS Turn on the humidifier POWER switch The power indicator light will turn on immediately and the internal blower will begin to operate when powered by the controller When the basin is full the automatic water level switch will activate and provide power to the ultrasonic transducer When this happens the unit will start producing a fine mist Rotate the MIST INTENSITY control This control determines how fast the water is converted from a liquid to a mist For most applications set the control at ll position Rotating the knob clockwise II will produce a denser mist rotating the knob counter clockwise I will produce a finer mist When operating at high temperatures or in large enclosures set the knob at maximum ll for best results 2 1 2 Operation Once the System has been properly set up the user does not have to do anything else to operate the system Operation will be under the control of the Model 5518 Microprocessor Humidity Controller Refer to Section 3 2 Microprocessor Humidity Controller Operation 1 Remove the green Caplug covering the Chamber Vent The vent inside the chamber is the 1 25mm orifice on the right wall the green plug is located here The vent passes through to the outside right wall The 1 25mm barb on the outside should remain open 12 2 Set the Humidity Controller set point to a value above ambient humidity Refer to Section 3 2 1 Microprocessor Humidity
9. Controller Operation 3 Turn on the RH INCREASE switch on the Model 5518 front control panel This will not automatically turn on the Humidifier Turning on the RH INCREASE switch only makes the humidifier available to the Microprocessor Controller When the microprocessor tells the Humidifier to activate the small green LED in the upper left corner of the microprocessor will light The Humidifier will begin producing a mist and the pump will force it into the chamber through the Humidity Input Barb 4 The microprocessor will determine the amount of humidification needed to maintain the desired set point If less than the full capacity of the Humidifier is needed the controller will provide pulses of power to the unit to limit the output The Humidifier will be turned on and off cyclically to obtain an average humidity output lower than the full capacity of the Humidifier NOTE To obtain a smooth even humidity output the Cycle Time CYC t should be set to 1 0 second Longer cycle times will create longer gaps between humidification pulses DO NOT SET THE CYCLE TIME LESS THAN 1 0 SECOND Shorter pulses may damage the Model 5472 2 1 3 1 Operating Precautions The humidifier should operate reliably if the following precautions are observed 1 Always run the humidifier directly to the chamber Never attempt to combine the humidifier output with another air or gas source 2 Always provide a vent on the cha
10. For manual control should a sensor fail record typical SP1 P values beforehand PL 1 100 Set SP1 power limit percentage 100 to 096 of the duty cycle Limits maximum SP1 heater output power during warm up and in proportional band PL 2 100 Set SP2 power limit percentage 100 to 096 of the duty cycle Limits maximum SP2 cooling output power during warm up and in proportional band SP2 OPERATING MODES SP2 A Cool Main SP2 operating mode 40 5 3 5 Must remain in Cool mode properly to operate the cooling system If use of the Model 5463 Liquid Carbon Dioxide System is not needed it is recommended that SP2 A be set as nonE The output to the cool valve will be disabled and will not click on and off unnecessarily SP2 b nonE Subsidiary SP2 mode latch sequence Non linear dehumidify proportional band INPUT SELECTION AND RANGING C to F conversion A total of 4 settings must be modified to change scales These include hi SC lo SC unit and ZEro See Level 3 For these settings there will be two sets of values in parenthesis The first one is the C setting the second is the F setting diSP 0 1 Select display resolution hi SC 100 212 0 Sets Sensor full scale The sensor full scale is also the upper limit for the set point Lo SC 0 0 32 0 Sets Sensor minimum The sensor minimum is also the lower limit for the sensor set point inPt Lin1 Selects a L
11. Ibs 0 45kg of Desiccant Std b Model 5478 Self Regenerating Dehumidification System requires external air compressor or house air at 50 100 psi 2 c Model 5465 Dry Gas Dehumidification System 8 CALCOMMS Computer Software Interface Package Optional Allows remote monitoring charting and reprogramming of the Microprocessor Controllers from a PC 1 1 1 Front Panel Description The front panel of the Model 5518 Chamber is shown in Figure 1 0 3 CONTROLLED ENVIRONMENT CHAMBER Figure 1 0 3 Model 5518 Chamber Front Panel 1 1 1 1 Microprocessor Controllers The Model 5518 utilizes CAL 3300 microprocessor control modules to control the humidity and temperature in the chamber The controllers may be operated as stand alone units or as part of a computer controlled system using the optional CALCOMMS software package that can control monitor and log up to 32 control modules 16 Chambers simultaneously The 3300 module displays the measured parameter continuously and the set point at the touch of a button It can perform a single ramp soak cycle Point source LEDs in both modules display the operating status of the control function Front panel ON OFF switches enable the respective operating systems to be placed in standby without disturbing controller settings Controllers can be programmed as either ON OFF or as proportional control PID where the process is constantly monitored and power to the 3 operating
12. control the flow of gas from the user supplied regulated nitrogen tank or other dry air source The 14 quick disconnect fitting supplied is connected to the regulated air output The supplied 14 tubing connects the dry air source to the AIR IN chamber fitting on the side panel NOTE 2 3 a ES 888298888 Make all connections prior to turning on the dry air The pressure from the dry gas source must be limited to 50psi If using a tank secure it properly so that it cannot tip over and cause property damage or bodily injury This is a one way system where gas is injected into the chamber to purge out the wet air The hose barb fitting on the chamber must be left open or be used to vent the gas to prevent pressure build up Operation is similar to the desiccant pump system where the controller pulses the valve to regulate the amount of dry gas entering the chamber Dry nitrogen is capable of reducing the humidity in the chamber to less than 1 RH but due to mechanical considerations the lower limit of the chamber is specified at lt 5 System Performance Chamber performance pertains to the ability of the chamber to reach and then hold a given humidity level along with humidity gradients It is not only a function of the chamber but of the temperature operating systems and controllers used Figure 2 0 2 are charts showing the time typically required to decrease and increase humidity Blue RH Red T C plus humidity
13. gradients using the optional CALCOMMS software package for the standard Model 5518 configuration Other operating systems will exhibit different performance characteristics HUMIDITY 1 00 90 80 70 60 50 40 30 20 10 o Rate of decrease Rate of increase HUMIDITY GRADIENTS A 4315180 9 4 518 RH Top C SD Ton RH 46 5 MIO C MID RH 23 i E 457 Low C 285 Low C 9 7 Low RH 1 i 81 5 Low RH Increase temperature constant low RH Increase RH constant temperature Figure 2 0 2 Typical Humidity Temperature performance charts 3 0 MICROPROCESSOR HUMIDITY CONTROLLER 3 1 Description The Microprocessor Humidity Controller in conjunction with the Model 554 temperature compensated RH sensor is capable of controlling the relative humidity in the chamber working space by supplying a proportionally controlled power output to the Humidification System and or Dehumidification System The controller provides low voltage 5 VDC 15mA control signals to the INCREASE and DECREASE solid state relays located on the PC Board When the low voltage signal is applied to the relay Input the Output of the relay closes and allows AC Power to flow to the connected device When the RH FUNCTION switches on the front panel are in the OFF 0 position AC power is manually disconnected from the control relays and no humidification or dehumidification can take place until the switch is p
14. m Lowest RH Bl Highest RH Relative Humidity 96 32 40 50 60 70 80 90 100 110 120 130 Temperature Farenheit Figure 1 0 1 Model 5518 Dew point performance chart The overall dimensions of the Model 5518 are 54 Wx25 5 Dx22 H 137x65x56cm The usable interior working space measures 39 Wx20 Dx21 H 99x51x54cm 1 1 Chambers Controllers amp Operating Systems The controllers and dehumidifier pump are housed in a separate compartment on the right side of the Chamber as shown in Figure 1 0 2 Figure 1 0 2 Model 5518 Controlled Environment Chamber The systems are accessible via the removable white acrylic panel on the right side of the Chamber Controllers and Operating Systems that are available with the Model 5518 are as follows 1 Microprocessor Temperature Controller with single ramp soak constant temperature momentary set point display Std Model 554 Temperature compensated RH and RTD Temperature Sensor 3 Integrated 500 Watt Heater Std Choice of Cooling Systems a Model 5463 Liquid to Gas CO Cooling System Std b Model 5473 150W 400W 510 1360 BTU Thermoelectric Cooling System c Model 5566 Liquid Nitrogen Cooling System Microprocessor Humidity Controller single ramp soak constant temperature momentary set point display Std Model 5462 Ultrasonic Humidification System Std Choice of Dehumidification Systems a Model 5461 Desiccant Pump Dehumidification System 1 0
15. open end of the tubing should be exhausted outside the working environment 5 Connect the Transfer Hose to the COs Tank and Valve as shown in Figure 4 0 1 Figure 4 0 1 CO2 cylinder hook up a Connect the Female Quick Disconnect fitting to the Male Quick Disconnect fitting Pull back on the collar of the female fitting and place it onto the male fitting release the collar These fittings should mate to form a leak free seal b Connect the other end of the transfer hose Large Brass Fitting to the CO Oylinder Tighten the fitting onto the tank using a wrench 4 2 1 3 Operation The user does not have to do anything else to operate the system Total operation will be under the control of the microprocessor temperature controller The temperature controller is a PID microprocessor with a time proportioned AC voltage output Refer to Section 5 2 Microprocessor Temperature Controller Operation for a full description of operation 32 The user should periodically monitor both the status of the CO cylinder and the cooling performance of the system to check for an exhausted CO tank 4 2 1 4 Changing CO Tank Before disconnecting any fittings or attempting to change the tank all of the CO2 must be vented from the system Venting the CO will relieve any pressure in the system Failure to bleed the system may result in injury To bleed the pressure from the line 1 Turn ON the Cooling Valve Turn on the T
16. other warranties and the Seller denies any other promise guarantee or warranty with respect to the equipment or accessories and in particular as to its or their suitability for the purposes of the buyer or its or their performance either quantitatively or qualitatively or as to the products which it may produce and the buyer is expected to expressly waive rights to any warranty other than that stated herein ETS must be notified before any equipment is returned for repair ETS will issue an RMA Return Material Authorization number for return of equipment Equipment should be shipped prepaid and insured in the original packaging If the original packaging is not available the equipment must be packed in a sufficiently large box or boxes if applicable of double wall construction with substantial packing around all sides The RMA number description of the problem along with the contact name and telephone number must be included in formal paperwork and enclosed with the instrument Round trip freight and related charges are the owner s responsibility 49 WARNING WOODEN CRATES MUST NOT BE USED PACKAGING OF DELICATE INSTRUMENTS IN WOODEN CRATES SUBSTANTIALLY INCREASES THE CONTENT S SUSCEPTIBILITY TO SHOCK DAMAGE DO NOT PLACE INSTRUMENTS OR ACCESSORIES INSIDE OTHER INSTRUMENTS OR CHAMBERS ELECTRO TECH SYSTEMS INC WILL NOT ASSUME RESPONSIBILITY FOR ADDITIONAL COST OF REPAIR DUE TO DAMAGE INCURRED DURING SHIPMENT AS A RESULT OF POOR PAC
17. right wall the 1 25mm barb on the outside should remain open Set the Humidity Controller set point to a value below the ambient humidity Refer to Model 5518 Microprocessor Humidity Controller Operation Turn on the RH DECREASE switch on the front panel This will not automatically turn on the dehumidification system Turning on the RH DECREASE switch only makes the dehumidification system available to the microprocessor controller When the controller tells Dehumidification System to activate the small red LED on the lower right side of the microprocessor display will light The internal air pump will begin moving The pump will draw moist air from the Chamber working space and force it through the desiccant column The dried air will then be returned to the chamber The microprocessor controller will determine the amount of drying needed to maintain the desired set point If less than the full drying capacity of the Desiccant Dehumidification System is needed the controller will provide pulses of power to the unit to limit the quantity of dried air coming into the chamber The pump will be turned on and off cyclically to obtain an average input of dried air less than the full capacity of the Dehumidification System To achieve a smooth even dehumidification process the humidity microprocessor Cycle Time 2 CYC 2 should be set to 2 0 seconds Longer cycle times will create longer gaps between dried air puls
18. system pulsed at a rate that maintains the parameter measured at the sensor to within 0 2 of the set point Refer to Sections 3 0 and 5 0 respectively for a full explanation of all functions and features 1 1 1 2 Front Panel Switches 1 2 POWER The Main Power Switch is the black rocker switch located directly below the Temperature Controller to the left of the Fan Power Knob This switch disconnects all power going to the Chamber Systems I is ON O is OFF FAN The Fan ON OFF Knob is located to the right of the Power Switch This switch controls the circulation fans inside the cabinet workspace TEMP Allows the user to manually disable the Temperature Control System Pushing this switch to the Off 0 position manually disconnects the low voltage control signal from either of the Temperature Control Relays independently The Microprocessor will still show the Temperature in the display the set point may still be adjusted the internal LEDs will still illuminate and the AC Power will still be sent to the solid state Control Relays The Relay Output will open because the low voltage control signal will no longer be connected to the Relay therefore the corresponding Temperature system will not receive AC Power and will not operate RH Allows the user to manually disable the Humidity Control System Pushing this switch to the Off 0 p
19. time means how often the unit can potentially be turned on and then off in succession The ETS Model 5462 and Model 5472 Humidifiers may each be safely turned on and off once a second DO NOT DECREASE CYCLE TIME BELOW 1 0 SECOND when operating these systems The shorter the cycle time the greater the degree of precision that may be achieved with the controller If using any other humidification system determine the minimum cycle time at which the unit can safely operate consult the manufacturer s instructions for the unit oFSt 0 0 Do Not Change The Offset Manual Reset control is only usable when the integral time int t is turned off Since the integral time is being used the offset control may be ignored SP LK oFF Locks the set point preventing unauthorized adjustment SP2 OPERATING PARAMETERS The SP2 parameters can be configured in a variety of ways In the Model 5518 Humidity Controller the SP2 parameters are used to tailor the Dehumidification System output for best RH control SET 2 0 0 Setpoint 2 allows the user to create a setpoint offset for the Dehumidification System It is generally not used for the Desiccant Dehumidification System bnd 2 20 0 Recommended Bnd 2 should generally be equal to bAnd The increase and decrease system will work within the same proportional band helping to prevent overlap in the system s operation i e the Dehumidification System will have a tendency to stay
20. to the sensor 1 2 Figure 1 0 5b Inside left side Figure 1 0 5c Inside right side Controlled Environment Description The controlled environment section of the Chamber is 13 ft 0 32 m with a useable internal working space of 39 Wx20 Dx21 H 99x51x54 cm Located on the rear wall is an aluminum panel that protrudes 4 inside and contains the heater thermal safety switch and 110 cfm fans that are controlled by an ON OFF knob located on the front panel Also included is an accessory North American GFI power outlet Mounted to the top of the unit is a weather tight 18 Watt fluorescent light controlled by an ON OFF switch located on the front panel 1 3 The optional thermoelectric cooling system is mounted to the rear wall behind the aluminum panel when the chamber is so equipped The wall separating the controlled environment from the electronics compartment is 0 25 acrylic and contains the humidity and temperature sensor dry air in out ports plus the gas cooling orifice fitting The humidifier output is located on the upper middle portion of the wall The left hand side of the Chamber consists of a 12 W x 4 H 30 5x10cm opening with a hinged access door secured by 3 2 turn latches Towards the rear is a 1 25 32mm ID access hole for feeding cables and tubing to instrumentation placed inside This hole should be sealed using the soft putty compound provided The front of the Chamber consists of a large door containin
21. 34 NPT plastic compression fitting The input is configured at the factory to accept the signal from the ETS Model 554 Humidity Temperature Sensor The Model 554 signals are both 0 1VDC corresponding 0 100 RH and 0 100 C 32 212 F respectively 4 Sensor Interface PC Board The Sensor Interface PC Board shown in Figure 1 0 3 is a dual channel device used to convert the 0 1VDC outputs from the Temperature and RH sensors into 0 50mVDC signals for input to the respective microprocessor controllers Each channel includes a ZERO adjustment potentiometer and a SPAN adjustment potentiometer This PC Board should be calibrated every time the Model 554 Sensor is recalibrated Refer to Section 7 0 for calibration procedure Figure 1 0 3 Interface board adjustments 1 1 2 Side Interface Panel Description All user connections to the Chamber except the humidifier input and the high pressure liquid CO connection are made through the Side Interface Panel shown in Figure 1 0 4 Power connections Operating Systems connections and the Computer interface are all located on this panel The 5 Side Interface Panel is a modular layout that is modified to meet the specifications of the Operating Systems ordered with the Model 5518 Chamber Tube fittings may be added removed and power outlets may be added removed The following sections will describe the main features of the Side Interface Panel in the Standard Model 5518 Configuration For
22. CONTROLLED ENVIRONMENT CHAMBER Model 5518 Operating Manual 3 07 electro tech systems inc 3101 Mt Carmel Avenue Glenside PA 19038 Tel 215 887 2196 Fax 215 887 0131 www electrotechsystems com TABLE OF CONTENTS 1 0 MODEL 5518 CONTROLLED ENVIRONMENT CHAMBER 2 0 3 0 1 1 Chamber Controllers amp Operating Systems 1 1 1 Front Panel Description 1 1 2 Side Interface Panel Description 1 1 3 Operating Systems Compartment 1 2 Controlled Environment Description 1 3 General Specifications 1 4 Unpacking chamber HUMIDITY OPERATING SYSTEMS 2 1 Humidification System 2 1 1 Set up 2 1 2 Operation 2 2 _ Dehumidification System 2 2 1 Desiccant Pump Dehumidification System 2 2 2 Self Regenerating Dehumidification System 2 2 3 Dry Gas Dehumidification System 2 3 System Performance MICROPROCESSOR HUMIDITY CONTROLLER 3 4 Description 3 1 1 Controller Specifications 3 2 Controller Operation 3 2 1 Set Point Adjust 3 2 2 Humidification System 3 2 3 Dehumidification System 3 3 Programming the Microprocessor Controller 3 3 14 Accessing the Programming Menu 3 3 2 LEVL C Level C 3 3 3 LEVL 1 Level 1 3 3 4 LEVL 2 Level 2 3 3 5 LEVL 3 Level 3 3 3 6 LEVL 4 Level 4 mb o o Now 4 0 5 0 6 0 7 0 8 0 9 0 TEMPERATURE OPERATING SYSTEMS 4 1 Heating System 4 2 Cooling Systems 4 2 1 Liquid CO Cooling System 4 2 2 Thermoelectric Cooling System Model 5473 4 2 3 Liq
23. Cleaning Humidifier Transducer 1 Always unplug the humidifier from the Model 5518 Chamber before cleaning Empty all the water from the unit Pour water out or soak it up with a sponge 2 3 4 Disconnect or remove the water tank Clean the surface of the transducer using distilled vinegar and a soft clean cloth This is very important f the transducer is not kept clean it will fail Using distilled or deionized water keeps the build up to a minimum but cleaning with distilled vinegar cannot be ignored NOTE Do not use any tools with metal parts or sharp edges to clean the transducer Scratching the transducer may cause fatal damage to the unit To clean thick or heavy deposits pour a small amount of vinegar into the humidifier until the transducer surface is completely covered Let stand for 30 60 minutes Wipe clean with a soft cloth If further cleaning is needed a soft plastic bristle brush may be used to gently clean the transducer surface Never leave water in the humidifier or water tank when the humidifier is not in service Always empty all water and thoroughly dry all parts of the humidifier when it is to be stored or taken out of service for any period longer than one week Do not seal the water tank in storage Leave the top off to allow the air to completely dry the tank Any residual moisture will encourage bacterial growth Never clean any parts of the humidifier with water above 120 F
24. EMP DECREASE switch on the front panel and adjust the set point several degrees below the temperature inside the chamber Wait for the Cool Valve to turn ON 2 While the Cool Valve is open turn off the manual valve on top of the CO tank This will shut off the CO supply to the system The CO will bleed out of the cooling nozzle into the chamber When all the CO is out of the system the flow of gas from the nozzle will stop 3 Using a wrench disconnect the Transfer Hose loosen the large brass fitting from the CO tank 4 Replace the empty tank with a fresh Liquid CO tank Then using a wrench reconnect the transfer hose 5 Turn OFF the TEMP DECREASE switch on the front panel This will close the Cool Valve 6 After the system is turned OFF open the manual valve on top of the CO cylinder The Transfer Hose and Cool Valve will now be pressurized If any leaks occur close the manual valve on top of the CO cylinder and tighten any fittings that are leaking Open the manual valve and recheck for leaks 4 2 1 5 Specifications and Performance 1 Cooling Capacity The Model 5463 CO Gas Cooling System when used in the ETS Model 5518 Chamber with a full 50 Ib CO tank will provide cooling to below 32 F 0 C The total CO consumption rate for the system depends upon the temperature that is being maintained The following chart shows the approximate consumption rate for the syst
25. Fans 2x110 cfm 6230 I min ON OFF Access Ports right side 2x4 6mm Quick disconnects 1x1 25 4mm Hose barb 1x112 31 4mm cable pass through located on left side Lighting 18W sealed fluorescent ON OFF Sw Dimensions Overall 54 Wx25 5 Dx22 H 137x65x56cm Working space useable 39 Wx20 Dx21 H 99x51x54 cm Weight 120 lbs 55 kg Operating Systems Dehumidify Desiccant Pump 1 0 Ib 0 45kg CaSO 0 6cfm Humidify Ultrasonic Capacity Distilled Water 0 5 gal 1 9 I tank Flow rate lt 0 1 cfm max Heat Electric 500W Cool CO Liquid to gas conversion Power Voltage 115 230VAC 50 60Hz Specify Current 8 10 Amps 1 4 Unpacking Chamber The standard Model 5518 Controlled Environment Chamber is shipped in 2 separate cartons The chamber is double boxed in double wall custom cartons and the accessories shown in Figure 1 0 6 are packed in a second double walled carton Ultrasonic Humidifier 5 lb Jar of Desiccant 1 lb Desiccant Column Humidifier Hose Dehumidifier Tubing Pliable Sealer Cooling Nozzle Cleaning Tool Figure 1 0 6 Model 5518 Accessory box contents Upon receipt immediately inspect the cartons for any visible damage If any shipping damage is noticed unpack the chamber and inspect it for damage Take pictures of any abnormalities observed Save all cartons until it is certain that they will no longer be needed If the Chamber has to be returned to ET
26. KAGING
27. S for any reason the original packaging must be used NOTE Report any damage immediately to the common carrier delivering the System and to ETS All damage claims must originate from the recipient Failure to report damage in a timely manner may result in the claim not being paid ETS will not be responsible for damaged or lost components if not reported to ETS within 30 days of shipment Save all cartons and packing material until the Model 5518 System is installed and operating 10 2 0 HUMIDITY OPERATING SYSTEMS 2 1 Humidification System The Model 5518 Chamber includes an ETS Model 5462 Ultrasonic Humidification System The humidifier is a separate unit that sits adjacent to the right side of the Chamber The humidifier is connected to the chamber by attaching the 1 I D clear tubing provided to the input barb located on the upper right corner of the Side Access Panel left of the cooling valve input Refer to the Set up instructions below before using the Humidifier The Model 5462 Ultrasonic Humidifier shown in Figure 2 0 1 produces a fine water mist through ultrasonic action The mist is forced from the humidifier into the chamber by a small quiet fan The fan draws in ambient air This is not a closed loop system Figure 2 0 1 Model 5462 Ultrasonic Humidification System 2 1 4 Set up The Model 5518 comes with green Caplugs covering the mist output and the chamber vent These Caplugs must b
28. WARRANTY Electro Tech Systems Inc warrants its equipment accessories and parts of its manufacture to be and remain free from defects in material and workmanship for a period of one 1 year from date of invoice and will at the discretion of Seller either replace or repair without charge F O B Glenside similar equipment or a similar part to replace any equipment or part of its manufacture which within the above stated time is proved to have been defective at the time it was sold All equipment claimed defective must be returned properly identified to the Seller or presented to one of its agents for inspection This warranty only applies to equipment operated in accordance with Seller s operating instructions Seller s warranty with respect to those parts of the equipment purchased from other manufacturers shall be subject only to that manufacturer s warranty The Seller s liability hereunder is expressly limited to repairing or replacing any parts of the equipment manufactured by the manufacturer and found to have been defective The Seller shall not be liable for damage resulting or claimed to result from any cause whatsoever This warranty becomes null and void should the equipment or any part thereof be abused or modified by the customer of if used in any application other than that for which it was intended This warranty to replace or repair is the only warranty either expressed or implied or provided by law and is in lieu of all
29. annunciator AL Select on to disable AL diS S dir Do Not Change Display sensitivity DEr S 0 1 Do Not Change Derivative sensitivity 29 4 0 TEMPERATURE OPERATING SYSTEMS 4 1 4 2 Heating System The Model 5518 Chamber contains 2 250 Watt Electric Heaters 500 Watts total The heater is an integral part of the chamber located behind the white aluminum panel inside the Chamber workspace Since the heater is already installed there is no additional set up required After turning ON the TEMP INCREASE switch the microprocessor temperature controller governs the operation of the Heating System 1 The controller will determine the amount of heat needed to maintain the desired set point Power will be applied to the heater as a series of time proportioned pulses Refer to Section 4 2 Microprocessor Temperature Controller Operation for details The electric heating element and indicator light are located on white aluminum panel containing the fans located on the inside rear wall the heater is hidden from view The heater indicator light will illuminate to indicate when power is being applied to the heater The microprocessor LED s will illuminate at the same time A thermal safety switch also on the Panel is connected in series with the heater Power to the heater will be cut off if the temperature within the chamber exceeds 135 F 58 C The acrylic chamber will begin to melt at 150
30. appropriate to maintain the desired set point in the chamber For best results the Cycle Time CyC t should be set as short as possible The minimum cycle time for the 500 Watt Heater in the Model 5518 Chamber is 1 0 second Shorter times may damage the controller 5 2 3 Cooling System The Gas Cooling System may be disabled if it is not needed or if not connected to a gas tank In LEVEL 2 of the Programming Menu adjust SP1 P from Cool to nonE This will manually disable only the cooling system and prevent the solenoid valve from clicking on and off unnecessarily The Heating System will be unaffected To operate the Model 5518 Cooling System 1 2 Adjust the set point to a value below the ambient temperature Turn on the TEMP DECREASE switch on the front of the Control Panel This will not automatically apply power to the cooling system Turning on the TEMP DECREASE switch only makes the cooling system the available to microprocessor controller When the controller activates the cooling system the small red LED in the lower right corner of the temperature controller display will illuminate The microprocessor will determine the amount of cooling needed to maintain the desired set point in the enclosure 36 If less than the full output capacity of the cooling system is needed the controller will provide pulses of power to the unit to limit the output The cooling system will be turned on and off cy
31. ation settings it will only change the units displayed LEVL 3 Level 3 Level 3 is the output configuration level There are also features for calibration adjustment and performance data reading OUTPUT CONFIGURATION SP1 d SSd1 Do not change Assigns humidification control to the appropriate output SP2 d SSd2 Do not change Assigns dehumidification control to the appropriate output SAFETY SETTINGS Burn uP SC Do Not Change Sensor burnout break protection This safety setting is not applicable for RH control it is meant as a high temperature low temperature cutoff for heating applications to protect the surroundings from damage due to sensor failure rEv d 1r 2d Do Not Change Select output modes Direct Reverse Select Reverse for Humidification and Direct for Dehumidification rEv 1n 2n Do Not Change Selects Microprocessor LED display mode Normal mode is selected for each LED In normal mode the lower left red LED will light when the microprocessor calls for dehumidification and the upper left green LED will light when the microprocessor calls for humidification SPAn 60 Do Not Change Changing the SPAn will affect unit calibration NOTE The calibration settings SPAn amp ZEro should not be altered All calibration should be performed on the Model 554 Sensor Temp amp RH directly or through the calibration potentiometers on the Model 5518 Sensor Interface Board The
32. ative Time in seconds The derivative time in combination with the dAC is responsible for keeping the environment moving toward the set point following a pre determined curve set 38 by the dAC in combination with the bAnd The curve is followed to help avoid set point overshoots Shortening the derivative time will cause the controller to recover slowly from disturbances Lengthening the derivative time may cause oscillations dAC 1 0 Recommended The Derivative Approach Control determines how quickly the unit will reach the set point without overshooting The dAC creates a gently sloping exponential curve that the system must follow when approaching the set point The smaller the number the quicker the unit will allow the set point to be reached The dAC multiplied by the band determines where the beginning of the approach curve will be located A larger dAC setting will cause the beginning of the dAC curve to be further away from the set point The larger setting will control overshoots better but will cause responses to disturbances to be slower CYC t 1 0 Recommended Cycle time means how often the unit can potentially be turned on and then off in succession The ETS 500 Watt heater may be safely turned on and off once a second DO NOT DECREASE CYCLE TIME BELOW 1 0 SECOND when operating this system The shorter the cycle time the greater the degree of precision that may be achieved with the controller If using any
33. cal Functions ALL Locks all functions unrestricted LEVL VEr dAtA SP LK 42 Note Locked functions and options may be read ProG Auto Program mode auto exit switch Auto exit returns display to normal after 60 seconds of key inactivity select StAy to disable no AL OFF Disable SP2 alarm annunciator AL Select on to disable AL diS S dir Do Not Change Display sensitivity DEr S 0 1 Do Not Change Derivative sensitivity 6 0 CALCOMMS COMPUTER INTERFACE Optional The standard CALCOMMS Applications Software provides enhanced display charting and alarming The Optional CALgrafix Process Monitoring amp Configuration and CALopc Server for interfacing with OPC compatible client software software packages are also available The software communicates with Windows 95 98 p2000 NT XP using the MODBUS protocol via a fully isolated RS 485 multiple units link for CALCOMMS The graphic WINDOWS based software provides PC supervision of any combination up to 32 control modules with the capability of remote adjustment instrument configuration cloning saving and retrieving instrument settings to files together with logging and charting Up to 12 controller readings can be shown live on the screen in real time Gwm mint Ln idd hd eh ne EMO MENU aiis E c EBD ms Controller Configuration Charting Controller Activity To gain full benefit of CALCOMMS software it is recommended that
34. clically to obtain an average output lower than the full capacity of the cooling system appropriate to maintain the desired set point in the enclosure For best results the Cycle Time 2 CyC 2 for the Gas Cooling System should be set as short as possible The minimum cycle time is 1 0 seconds 3 0 recommended 5 3 Programming the Microprocessor Controller 5 3 1 Accessing the Programming Menu 5 3 2 1 5 To access the Controller Program Menu press the and Y buttons simultaneously for three 3 seconds The controller will enter the Menu on Level 1 in the tunE function If using the CalComm Computer Program refer to the CALCOMM section of the Manual To scroll to different parameters within a Level press the lt button to scroll right and the button to scroll left To change a parameter or change Levels press and hold the button Press the or Y buttons to change the parameter All factory programmed values listed here are optimized for use with the ETS Model 5463 Liguid Carbon Dioxide Cooling System and the ETS Model 5474L s 500 Watt Heating System Other systems may reguire different settings If the Model 5518 Chamber has different systems the information programmed into the controllers will be different Information on the specific program is provided separately if not contact ETS To exit the menu press and hold v for three seconds LEVL C Lev
35. d on However no dry air will be allowed into the chamber workspace until the 3 way control valve is energized b Turning on the RH DECREASE switch makes the 3 way control valve available to the Microprocessor Controller When the microprocessor tells the control valve to energize the large red LED in the lower right corner of the Humidity Microprocessor will light The valve will open and dried air will flow into the chamber workspace 5 The microprocessor will determine the amount of drying needed to maintain the desired set point If less than the full drying capacity of the Self Regenerating Dehumidification System is needed the controller will provide pulses of power to the control valve to limit the quantity of dried air coming into the chamber The controller will open and close the control valve cyclically to obtain an average input of dried air less than the full capacity of the system To achieve a smooth even dehumidification process the humidity microprocessor Cycle Time 2 CYC 2 should be set to a low value However a short cycle time will prematurely wear out the control valve As a compromise CYC 2 should be set to 5 0 seconds Shorter cycle times will afford better low humidity control at the desired set point but at the risk of accelerating valve wear 2 2 3 Model 5465 Dry Gas Dehumidification System Optional This system consists of a solenoid valve installed inside the operating systems compartment to
36. difier will be turned on and off cyclically to obtain an average humidity output lower than the full capacity of the humidifier appropriate to maintain the desired set point in the enclosure For best results the Cycle Time CyC t should be set as short as possible Refer to the Humidification System instructions for 22 minimum cycle time recommendations The minimum cycle time for the ETS Model 5462 is 1 0 second 3 2 3 Dehumidification System The Dehumidification System air pump is located inside the Chamber control cavity The desiccant column is attached externally through the fittings labeled AIR IN and AIR OUT on the Side Interface Panel To operate the Model 5518 Dehumidification System 1 2 3 Read the operating instructions for the Dehumidification System being used Adjust the set point to a value below the ambient RH conditions Turn on the RH DECREASE switch on the front of the Model 5518 control panel This will not automatically apply power to the dehumidification system Turning on the RH DECREASE switch only makes the dehumidification system available to the microprocessor controller When the controller activates the outlet the small red LED in the lower right corner of the RH display will illuminate The microprocessor will determine the amount of dehumidification needed to maintain the desired set point in the enclosure If less than the full output capacity of the dehum
37. e removed before set up and operation The Humidifier must be used with distilled or de ionized water ONLY Different operating conditions will consume different amounts of water Leaving water in the tank longer than 1 2 weeks is not recommended Always refresh the water supply to prevent the growth of bacteria and other things that will degrade water quality NEVER add anti bacterial growth treatment to this water it will damage the humidifier Fill the water tank USE Distilled or Deionized water ONLY Remove the water tank from the humidifier unit and inspect it for small cracks or any other damage that may have occurred during shipping a small crack will allow air to enter the tank which can cause the water to overflow the basin and possibly damage the unit After inspection fill the tank 34 full with distilled or deionized water ONLY user provided NOTE Using tap water will destroy the ultrasonic transducer and the associated electronics Tap water will also cause a white dust to form on all surfaces including the humidity sensor which will also be destroyed Replace the tank on the humidifier unit The water will automatically drain from the tank into the basin and stop when the basin is full If the tank is not installed properly or the humidifier is not on a level surface water may continue to flow after the basin is full If this occurs remove the top immediately check for problems and try again If the problem
38. el C Level C is only visible when the controller is fitted with the COMMS option RS 485 computer interface card Level C is responsible for the communication protocol for the unit when interfacing with a PC The values in Level C must match the values on the computer screen to establish communication Addr 1 Instrument Communication Address This address may be changed to any number suitable to the user bAud 9600 The baud rate should be set as high as possible dAtA 18n1 Do Not Change The data format should not change 37 5 3 3 DbuG off Do Not Change Debugging is an advanced feature that will not be covered in this manual LEVL 1 Level 1 Level 1 is the programming level The Proportional Integral and Derivative controls are adjusted here The combination of PID values is virtually limitless This allows the controller to be used in a wide variety of applications However this flexibility can also lead to confusion when programming the controllers in the Model 5518 s limited mode of operation To avoid confusion this section will discuss which parameters may be adjusted and which parameters should not be adjusted All Parameters are programmed at the ETS Factory to match the Operating Systems shipped with the Chamber The programmed values will control the chamber within specifications For tighter control the user may want to adjust the values The values listed here are for standard chambers onl
39. em at different temperatures assuming a full 50lb CO tank and room ambient temperature of 72 F 23 C 33 4 2 2 4 2 3 Time approx to empty CO tank 62 F 16 7 C 6 hours 52 F 11 1 C 3 hours 2 hours 32 F 0 C 1 hour NOTE These consumption rates are for maintaining the above temperatures When lowering the temperature from room ambient to the set point temperature the consumption rate will be higher The consumption rate will be as shown once the set point temperature is reached 2 To lower the CO consumption rate and extend the operating time per tank insulation should be added to the chamber Adding insulation will reduce heat loss and aid in stabilizing the chamber temperature especially at low temperatures 4 2 1 6 Maintenance and Troubleshooting The Model 5463 Liquid CO Cooling System should provide years of trouble free service Other than changing CO tanks when depleted very little servicing is required Refer to Section 8 2 for cleaning the nozzle orifice Thermoelectric Cooling System The Model 5473 Series of thermoelectric electric cooling systems are available as an option Refer to the Appendix for operating instructions if this option is installed in the Model 5518 Chamber Liquid Nitrogen Cooling System The Model 5466 Liquid Nitrogen Cooling System operation is similar to the standard liquid CO2 System installed Most liquid nitrogen supply tanks also provide n
40. er temperature and proportionally control the solenoid valve to provide the appropriate amount of cooling to maintain the desired set point 4 2 1 1 Cooling System Accessories 1 Liquid CO Transfer Hose consists of a 4 long with Braided Stainless Steel Safety Shield b Brass High Pressure Fitting for mating to Liquid CO tank c Brass Quick Disconnect female for mating to Valve Input 2 Cooling Nozzle Cleaning Tool 4 2 1 2 Liquid CO Tank Connections 1 Secure the CO cylinder to a wall using an approved securing belt or clamp Failure to secure the cylinder to a wall or other suitable stationary object may result in serious injury to personnel should CO cylinder fall over 2 The CO cylinder contains liquid carbon dioxide under extremely high pressure 800 1000 psi Care must be exercised at all times when working with this cylinder The manual valve on top of the cylinder 31 should be closed fully clockwise when the cooling system is not in use 4 Although CO is non toxic it can cause asphyxiation if not used in areas with adequate ventilation The Model 5518 Chamber is equipped with a Chamber Vent 1 White Hose Barb located in the middle of the Black Panel on the right side of the Chamber The spent CO gas will escape from the Chamber Vent and dissipate into the room atmosphere To vent the gas outside of the room or building connect an appropriate length of 1 ID tubing to the Vent Hose Barb The
41. es DO NOT SET THE CYCLE TIME LESS THAN 1 0 SECOND Shorter pulses may damage the Model 5461 pump 2 2 1 4 Renewing desiccant The desiccant can be renewed approximately ten 10 times before having to be replaced The granules must be removed from the drying column Disconnect the IN OUT tubing Unscrew the plastic cap on top of the unit and remove the felt pad Spread the desiccant evenly 1 2 granules deep on a metal or glass tray Heat the desiccant for approximately one 1 hour at about 400 F 2002C It should be allowed to cool in an airtight container before refilling the acrylic drying column The felt filters should also be pre dried at 200 F 100 C for about 30 minutes before assembly 2 2 2 Self Regenerating Dehumidification System Optional The Model 5478 Self Regenerating Dehumidification System is capable of drying the Model 5518 Chamber from 5096 RH to 1296 RH in less than 3 hours at room temperature 2 2 2 1 Description The Model 5478 Self Regenerating Dehumidification System requires 50 100 psi of air pressure at 2 6 cfm to operate Since air must be provided continuously either a separate air compressor or house air should be used for long term dehumidification applications to ensure reliable long term air The basic Self Regenerating Dehumidification System consists of a dual column self regenerating desiccant dryer utilizing molecular sieve desiccant and a 3 way control valve The dual column dryer operate
42. fferent systems the information programmed into the controller will be different Information on the specific program will be provided separately in the Appendix 5 To exit the menu press and hold lt v for three seconds LEVL C Level C Level C is only visible when the unit is fitted with the COMMS option RS 485 computer interface card Level C is responsible for the communication protocol for the unit when interfacing with a PC The values in Level C must match the values on the computer screen to establish communication Addr 2 Instrument Communication Address This address may be changed to any number suitable to the user bAud 9600 The baud rate should be set as high as possible dAtA 18n1 Do Not Change The data format should not change DbuG off Do Not Change Debugging is an advanced feature that will not be covered in this manual LEVL 1 Level 1 Level 1 is the programming level The Proportional Integral and Derivative controls are adjusted here The combination of PID values is virtually limitless This allows the controller to be used in a wide variety of applications However this flexibility can also lead to confusion when programming the controller in the Model 5518 s limited mode of operation To avoid confusion this section will discuss which parameters may be adjusted and which parameters should not be adjusted 24 All Parameters are programmed at ETS to match the Operating Sys
43. g a pair of 8 20cm dia ports to accept gloves or optional iris ports The standard Model 5518 is equipped with accordion sleeves with removable 10 size latex rubber gloves other sizes and types of gloves tgtbh6bare available Silicon rubber iris ports or a solid door are also available as options A hinged door secured by 10 2 turn latches with an access opening of 32 W x 14 H 81x36cm enables large objects to be placed inside To the right of the front door is the humidity and temperature control module This module is easily removed for servicing by loosening the four 4 captive mounting screws General Specifications Chamber Material 3 8 6mm clear amp white acrylic Construction PS30 polished welded seams Doors 3 8 9mm clear acrylic 2 turn latches Seal va 6mm Poron non setting gasket Gloves when configured 018 0 5mm replaceable hands natural rubber accordion sleeves 8 20 3cm ports Operating Range Humidity 10 to gt 98 Temp Std lt 32 135 F 0 55 C Controllers Type 2x CAL 3300 single ramp soak cycle 1x CAL 3300 opt 3 parameter linear input Resolution 0 1 0 1 Set Pt Tracking 0 1 Rec Out 0 1Vdc 0 20ma 4 20ma Computer IF MODBUS proto Via RS485 PC with W98 or higher NT Sensor Type Temp compensated RH Temp RH Capacitive film 0 to 100 non condensing Temp RTD 40 to 140 F 40 to 60 C Accuracy 1 5 RH 72 F 22 C 0 5 F 0 3 C
44. ge power control For manual control should a sensor fail record typical SP1 P values beforehand PL 1 100 Set SP1 power limit percentage 100 to 0 of the duty cycle Limits maximum SP1 humidifier output power during warm up and in proportional band PL 2 100 Set SP2 power limit percentage 100 to 0 of the duty cycle Limits maximum SP2 dehumidifier output power during warm up and in proportional band SP2 OPERATING MODES SP2 A Cool Main SP2 operating mode Must remain in Cool mode to properly operate the dehumidification system SP2 b nonE Subsidary SP2 mode latch sequence Non linear dehumidify proportional band INPUT SELECTION AND RANGING The following settings are used to calibrate the input of the unit for use with the ETS Model 554 RH Sensor diSP 0 1 Select display resolution hi SC 100 0 Sets Sensor full scale The sensor full scale is also the upper limit for the setpoint 27 3 3 5 Lo SC 0 0 Sets Sensor minimum The sensor minimum is also the lower limit for the sensor set point inPt Lin 1 Selects a Linear Input Voltage setting 0 50mV for use with the ETS Model 554 Humidity Sensor amp Sensor Interface PC Board 0 1VDC Input 0 50mVDC Output unit rh Selects process units The process units can be changed independent of the calibration settings In other words changing the setting from rh to any other units will not affect the calibr
45. gured with an RS 485 interface card The converter is a 9 pin 9 pin in line style connector The converter is gray and bears the label RS 232 TO RS 485 Model 485SDD9R If the computer has only a USB port contact ETS for the correct adapter 6 1 3 Connections 1 Connect the supplied 9 pin male female sub D cable to the RS 485 COMM PORT on the Side Interface Panel 2 Connect the other end of the cable to the RS485 side of the RS 485 232 converter 3 Connect the RS 232 side of the converter into the appropriate Comm Port on the PC 6 1 4 Software Installation Software installation instructions can be found on pp 9 11 in the CALCOMMS Manual The CALCOMMS Manual is separate from the CAL 3300 Users Manual It is the manual with the color cover Operation After installing the computer program and making the appropriate wiring connections to a PC turn to pg 11 in the CALCOMMS Manual This section is titled GETTING STARTED Follow the directions to begin operating the program 6 2 1 MODBUS Addresses 44 7 0 The MODBUS address is found in Level C The following addresses are preset at the factory TEMPERATURE controller address is set to 1 HUMIDITY controller address is set to 2 6 2 2 Open Communications Instructions for opening communication are found on pg 13 of the CALCOMMS manual 6 3 Logging and Charting Instructions for operating the Logging and Charting functions of the CALCOMMS program begi
46. hange Changing the SPAn will affect unit calibration NOTE The calibration settings SPAn amp ZEro should not be altered All calibration should be performed on the Model 554 Sensor Temp amp RH directly or through the calibration potentiometers on the Model 5518 Sensor Interface Board The SPAN adjustment pot on the Sensor Interface Board is far more accurate than the microprocessor setting ZEro 0 0 32 0 Zero sensor error see SPAn NOTE The Model 5518 Sensor Interface Board includes an internal ZERO adjustment pot that is far more accurate than the microprocessor setting PERFORMANCE DATA ChEK oFF Select control accuracy monitor rEAD Var Read control accuracy monitor TECH Ct A Read Autotune cycle data Using the Autotune function is not recommended VEr software version rSEt none Do Not Change f the unit is reset all programmed information will be lost Each parameter must be re entered manually LEVL 4 Level 4 Level 4 is a hidden level This allows locked functions to be inaccessible to any unauthorized user Access to Level 4 is gained through VEr in Level 3 Press and hold and Y for ten seconds Enter Level 4 at LoCK release and Y together LoCK LEV 2 Select from three lock options LEV 3 Locks Level 3 and 4 only Technical Functions LEV 2 Locks Levels 2 3 and 4 only Configuration and Techni
47. idification system is needed the controller will provide pulses of power to the unit to limit the output The dehumidification system will be turned on and off cyclically to obtain an average output lower than the full capacity of the dehumidification system appropriate to maintain the desired set point in the chamber For best results the Cycle Time 2 CyC 2 should be set as short as possible See the Dehumidification System instructions for cycle time recommendations ETS Model 5461 minimum cycle time is 2 0 seconds ETS Model 5478 minimum cycle time is 5 0 seconds 3 3 Programming the Microprocessor Controller 3 3 1 Accessing the Programming Menu 23 3 3 2 3 3 3 1 To access the Controller Program Menu press the and buttons simultaneously for three 3 seconds The controller will enter the Menu on Level 1 in the tunE function If using the CalComm Computer Program refer to Section 6 0 2 To scroll to different parameters within a Level press the button to scroll right and the Y button to scroll left 3 To change a parameter or change Levels press and hold the button Press the lt or Y buttons to change the parameter 4 All factory programmed values listed here are optimized for use with the ETS Model 5461 Desiccant Dehumidification System and ETS Model 5462 Ultrasonic Humidification System Other systems may require different settings If the Model 5518 Chamber has di
48. in the lower right hand corner of the main PC Board Pin 1 Humidity and is the first pin starting from the right side of the connector About 2 00 o clock as shown in Figure 7 0 2 Pin 4 Temperature and Pin 2 Ground e Figure 7 0 2 Sensor input connector Set the signal source to 0 000 VDC ground Using the Meter measure at the sensor inputs on each of the microprocessor controllers positions 1 and 2 Measuring at the RH Microprocessor adjust R3 for a reading of 0 000mVDC Measuring at the Temperature Microprocessor adjust R1 for a reading of 0 000mVDC Set the signal source to 1 000 VDC Measuring at the RH Microprocessor adjust R4 for a reading of 50 000mVDC Measuring at the Temperature Microprocessor adjust R2 for a reading of 50 000 mVDC Check the actual RH Microprocessor display to verify it shows 0 100 RH for and input of 0 1VDC at the sensor jack pint Adjust R3 amp R4 if necessary 46 10 Check the actual Temperature microprocessor display to verify it shows 0 100 C 32 212 F for an input of 0 1VDC at the sensor jack pin4 Adjust R1 amp R2 if necessary 8 0 MAINTENANCE The Model 5518 requires very little additional maintenance from that described in the individual operating systems sections except for the periodic cleaning of the humidifier and the cooling orifice For specific maintenance requirements contact ETS at 215 887 2196 for assistance or to obtain an RMA 8 1 8 2
49. inear Input Voltage setting 0 50mV for use with the ETS Model 554 RTD Temperature Sensor amp Sensor Interface PC Board 0 1VDC Input 0 50mVDC Output unit C F Selects process units The process units can be changed independent of the calibration settings In other words changing the setting from C to F or any other units will not affect the calibration settings it will only change the units displayed LEVL 3 Level 3 Level 3 is the output configuration level There are also features for calibration adjustment and performance data reading OUTPUT CONFIGURATION SP1 d SSd1 Do not change Assigns heating control to the appropriate output SP2 d SSd2 Do not change Assigns cooling control to the appropriate output SAFETY SETTINGS Burn uP SC Do Not Change Sensor burnout break protection This safety setting will protect a system if the sensor quits working All systems will be shut down if the temperature rises above the hi SC setting 41 5 3 6 rEv d 1r 2d Do Not Change Select output modes Direct Reverse Select Reverse for Heating and Direct for Cooling rEv 1n 2n Do Not Change Selects Temperature LED display mode Normal mode is selected for each LED In normal mode the lower left red LED will light when the microprocessor calls for the cooling system and the upper left green LED will light when the microprocessor calls for the heating system SPAn 60 Do Not C
50. itrogen gas If the Dry Gas Dehumidification option is installed this cooling configuration should be used The main difference between the two systems is that the Liquid Nitrogen System requires a cryogenic valve and hose assembly Refer to the Appendix for operating instructions if this option is installed in the Model 5518 Chamber 34 5 0 MICROPROCESSOR TEMPERATURE CONTROLLER 5 1 5 2 System Description The Microprocessor Temperature Controller in conjunction with the Model 554 RTD Temperature Sensor is capable of controlling the temperature in the Model 5518 Chamber by supplying a proportionally controlled power output to the Heating and or Cooling Systems The Controller provides low voltage 5 VDC 15mA control signals to the INCREASE and DECREASE solid state relays located on the PC Board When the low voltage signal is applied to the relay Input the Output of the relay closes and allows AC Power to flow to the connected device When the TEMP Function switches on the front panel are in the OFF 0 position power is manually disconnected from the control relays and no heating or cooling can take place until the switch is placed in the ON I position All devices in the Model 5518 are connected through terminals on the PC Board 5 1 1 Controller Specifications Refer to Section 3 1 1 Specifications Humidity Controller Controller Operation 5 2 1 Set Point Adj
51. laced in the ON I position All devices in the Model 5518 are connected using terminals on the PC Board 3 1 1 Controller Specifications Controller Sensor Sensor input std linear 0 1 0V Temperature compensated Accuracy 0 1 Humidity Capacitive film Resolution 40 1 of digital readout Range 0 100 10mV RH Calibration accuracy 0 25 max input Range 0 100 10mV RH Sampling frequency Input 10 Hz CUC 2 sec Accuracy 2 RH 73 F 23 C Display High Brightness LED Temperature RTD Reading 0 4 10mm Green Range 40 to 185 F 40 to 85 C 10mV C Set Point Same as Reading Accuracy 0 9 F 0 5 C SP1 Flashing square Green Size 0 625 dia x 6 5 L 15mm x 165m SP2 Flashing round Red Cable length 6 5 2m SP3 Alarm None Housing Polycarbonate Black Ral 7016 Controls Compliance EN50081 2 EN50082 2 Control module Function Up Down buttons Front Panel INCR ON OFF DECR ON OFF Power Input 90 240VAC 50 60 Hz AC output control current 1 000 VA max Std configuration 4A Heater Control 8A Solenoids 2A extra low turnoff leakage current Ramp Soak 1 cycle Communications Optional MODBUS protocol Windows 95 98 2000 NT XP 200MHz 16MB RAM min CALCOMMS only Multiple unit link RS 485 Software Standard CALCOMMS Applications Software Optional CALgrafix Process Monitoring amp Configuration Software CALopc Server Software for use with user software
52. mber being humidified 3 Clean the ultrasonic transducer frequently and thoroughly Any dirt or particle build up on the transducer will stress the electronics Once the electronics overheat and stop working the humidifier must be replaced With frequent cleaning the electronics should operate reliably for many years Clean the surface of the transducer using distilled vinegar and a soft clean cloth 4 Use Distilled or Deionized water only 2 2 Dehumidification System The Model 5518 Chamber includes an ETS Model 5461 Desiccant Pump Dehumidification System as standard As an option the Model 5478 Self Regenerating Dehumidification System and the Model 5465 Dry Gas Dehumidification System are available Operation of each system is described below 2 2 1 Desiccant Pump Dehumidification System The Model 5461 Dehumidification System shown in Figure 2 0 2 is a closed loop system designed to reduce the relative humidity in the Model 5518 Chamber to less than 10 RH The pump is installed in the control section of the chamber When paired with the Microprocessor Humidity Controller the humidity inside the chamber can be controlled without disturbance to within 0 2 RH of the set point at the sensor Figure 2 0 2 Desiccant Pump Dehumidification System Fittings shown are not included with the Model 5518 2 2 1 1 Description The Dehumidification System includes a small air pump located inside the Chamber control cavity 1 0 Ib
53. n on pg 21 of the CALCOMMS Manual CALIBRATION The only components of the Model 5518 Controlled Environment System that requires periodic calibration are the Microprocessor Controllers and Temperature Humidity sensor It is recommended that this section be returned to ETS for calibration However the user can check the overall system calibration as follows Place the sensor of a known calibrated temperature and humidity meter as close as possible to the System sensor After the temperature and humidity within the chamber has stabilized compare the readings They should be within the combined tolerance of the two measuring devices To return equipment to ETS for calibration or repair it is first necessary to obtain a RMA number Call 215 887 2196 To remove the Control Panel and sensor first gain access to the operating systems compartment by removing the 8 screws holding the right side panel in place Unplug all connections to the front Control Panel Loosen the 4 captive screws holding the Control Panel and remove Remove the sensor by loosening the compression fitting inside the controlled environment section Return both the Control Panel and sensor to ETS 7 1 Sensor Interface Board Figure 7 0 1 Interface board adjustments 7 1 1 Equipment Required UM 0 1 VDC signal source 2 Digital Voltmeter 7 1 2 Calibration Procedure 1 Attach the 0 1 VDC signal source to Pins 1 amp 4 of the Sensor Input connector located
54. o corresponds to an output of O 1VDC The analog output is a direct voltage reading from the sensors This connector is configured as an Analog Voltage 0 1VDC Output for monitoring the temperature and or humidity performance using a chart recorder or any other analog input device The minimum acceptable input impedance for the analog recording device is 20K ohms Input impedance lower than 20K ohms will affect sensor accuracy of the entire system Analog Voltage Output Wiring Connections Temperature Positive Pin 9 RH Positive Pin 1 Common Gnd Pin 4 1 1 2 3 DEHUMIDIFY IN OUT The Desiccant Pump Dehumidification System uses a pair of Quick Disconnect fittings The Pump is inside the Chamber Control Cavity and the Desiccant Column is outside the Chamber These two fittings AIR IN amp AIR OUT connect the Column into the Dehumidify loop Refer to Section 2 2 1 Dehumidification System 1 1 2 4 CO2 Input Connection When using the standard Liquid CO2 Cooling System a brass quick disconnect fitting is located in the top right corner of the acrylic Side Panel This fitting protrudes through the acrylic panel as shown in Figure 1 0 5a for connection to the user supplied liquid CO gas tank Refer to Section 4 2 1 Cooling System Operating Systems Compartment The Operating Systems compartment shown in Figures 1 0 5a b amp c contains the control electronics dehumidifier pump fluorescent light ballast plus access
55. osition manually disconnects the low voltage control signal from either of the Humidity Control Relays independently The Microprocessor will still show the Relative Humidity in the display the set point may still be adjusted the internal LEDs will still illuminate and the AC Power will still be sent to the solid state Control Relays The Relay Output will open because the low voltage control signal will no longer be connected to the Relay therefore the Humidity systems will not receive AC Power and will not operate LIGHT The Light Switch is located to the right of the POWER Switches left of the FAN Speed Knob This switch controls the overhead light installed in the Chamber workspace 1 1 1 3 Sensors amp PC Boards The Sensor Input and Control Relays are contained on a PC Board located at the rear of the Front Panel 1 Switches The switches are mounted to the front panel refer to Figure 1 0 3 2 Relays The solid state relays are removable and mounted in sockets secured with plastic cable ties on the PC Board 3 Sensor Input The Sensor Input is the 5 pin DIN jack located in the lower right corner of the PC Board The ETS Model 554 RH Sensor consists of a Temperature Compensated Relative Humidity Sensor and a RTD Temperature Sensor and is plugged into this jack The Sensor Head Sensing Elements must be in the Model 5518 Chamber environment The sensor is held in place on the divider wall with a
56. other configurations specific installation instructions will be included Figure 1 0 4 Model 5518 Side Interface Panel 1 1 2 1 AC Power Mains Labeled POWER this Universal IEC power connector is located on the bottom left corner of the panel The Voltage supplied Mains must match the Chamber Voltage All Chambers are 115 VAC 60 Hz unless otherwise specified 1 1 2 2 COMM PORT RS 485 amp Analog Voltage Outputs The Comm Port is the 9 pin subminiature D jack sub D located directly above the AC Power Cord Input This connector is used for both the analog sensor output signals and the optional RS 485 communications output from both the Temperature and Humidity Microprocessor Controllers Comms access to either or both units is gained through this jack Refer to Section 6 0 CALCOMMS Computer Interface 1 RS 485 Computer Interface The RS 485 portion of the Comm Port is active with controllers fitted with the COMMS option See Section 1 2 1 LEVL C The COMMS option allows the microprocessor to communicate with a PC running the CALCOMMS software RS 485 Wiring Connections Tx Rx Pin 7 Tx Rx Pin2 Ground Pin 4 If using the CALCOMM computer program refer to Section 6 0 CALCOMMS Computer Interface for set up instructions 2 Analog Voltage Output The Analog Voltage Output is always active Temperatures of 0 100 C 32 212 F correspond to an output of 0 1VDC Relative Humidity of 0 100 RH als
57. other heating system determine the minimum cycle time at which the unit can safely operate slightly shorter cycle times may be used for smaller heaters oFSt 0 0 Do Not Change The Offset Manual Reset control is only usable when the integral time int t is turned off Since the integral time is being used the offset control may be ignored SP LK oFF Locks the set point preventing unauthorized adjustment SP2 OPERATING PARAMETERS The SP2 parameters can be configured in a variety of ways In the Model 5518 temperature controller the SP2 parameters are used to tailor the cooling system output for best temperature control The SP2 parameters are all shown in C SET 2 0 0 Set point 2 allows the user to create a set point offset for the cooling system It is generally not used for the Gas Cooling System When a thermoelectric cooler or refrigerated cooling system is used this setting may be increased or decreased to determine the point at which the cooling system will activate These systems are operated in On Off mode instead of within a proportional band 39 5 3 4 bnd 2 2 0 Band 2 should generally be equal to bAnd The heating and cooling system will work within the same proportional band helping to prevent overlap in the system s operation i e the cooling system will have a tendency to stay off when only heating is needed and vice versa When a thermoelectric cooler or refrigerated cooling
58. rb adapters are included to adapt from the 2 OD fittings on the Side Interface Panel to the desiccant column 8 Plastic cap is fitted with O Ring gasket 9 Desiccator coil spring cadmium plated steel The system delivers air dried to a dew point of 100 F At room temperature the system will lower the humidity in the Model 5518 Chamber from 5096 RH to 1296 RH in about 2 hours 2 2 1 3 Desiccant Dehumidification System Set Up 1 Place the desiccant column somewhere near the chamber Next to or on top of the chamber are good locations 2 Cut 2 pieces of the 5 16 ID tubing long enough to connect the desiccant column to the Side Interface Panel of the Chamber Connect one piece of the tubing from the fitting labeled DEHUMIDIFY OUT on the Side Interface Panel to the lower fitting on the desiccant column To connect the hose barb adapters to the OD tubing fittings Push the barb adapter into the fitting as far as possible The tube will lock into place automatically To release the adapter push in on the collar of the fitting and gently pull out the adapter Connect the second piece of tubing between the upper fitting on the desiccant column and the fitting labeled DEHUMIDIFY IN on the Side Interface Panel of the Chamber The chamber vent inside of the Chamber is the 1 25mm opening on the right wall the green plug should be placed in the opening The vent passes through to the outside
59. s continuously to assure a constant supply of dried air on demand The 3 way control valve controls the flow of dried air into the chamber workspace The dryer and valve are mounted inside the control section of the Chamber The compressed air is passed on to the dual column dryer where it is forced through one of the desiccant columns The desiccant removes the moisture and dries the air down to a dew point of 40 F minimum The dried air is then split in two directions Most of the dried air is sent to the output A small portion of the dried air is diverted from the main flow 17 and directed into the second column to regenerate the desiccant in the second column The flow into the second column is in the opposite direction from the flow in the first column The dried air under high pressure forces out any moisture in the second column through the dryer vent located internally Every 30 seconds the process reverses and the second column will dry the air while the first column is regenerating The flip flop process continues as long as the system is in use The dried air not used for regeneration is sent to the dryer output The output of the dryer is attached to the 3 way control valve When dry air is needed in the chamber the valve is energized and opens to allow dry air to flow into the workspace When the valve is not energized the dry air is vented 2 2 2 2 Unit Specifications 1 The average flow rate from the uni
60. system is used this setting may be increased or decreased to determine the point at which the cooling system will activate These systems are operated in On Off mode instead of within a proportional band CyC 2 5 0 Recommended Cycle time means how often the unit can potentially be turned on and then off in succession 5 0 SECONDS is the recommended cycle time for the ETS Model 5463 Cooling System to achieve good control and extended valve life The ETS Model 5463 solenoid valve CyC 2 may be set as low as 0 5 second but short times will accelerate valve wear DO NOT DECREASE THE CyC 2 BELOW 0 5 SECOND when operating this system The cycle time may be increased above 3 0 seconds to extend valve life but control may suffer If using any other cooling system determine the minimum cycle time at which the unit can safely operate consult the manufacturer s instructions for the unit NOTE All functions in Level 2 3 amp 4 may be locked so that they may not be altered unless unlocked See section 4 4 5 Level 4 LEVL 2 Level 2 Level 2 is the controller configuration level The controller is capable of being configured in an unlimited number of ways However the parameters needed to control the temperature operating systems with the ETS Model 554 Temperature Sensor are programmed and locked MANUAL CONTROL MODES SP1 P Read SP1 output percentage power Read only hAnd off SP1 Manual percentage power control
61. t is 0 26 cfm 7 3 lpm 2 Air dried to a minimum dew point of 40 F with a saturated input at 90 F 3 Power 115 VAC 60 Hz 4 30Amps 230 VAC 50 Hz 2 15Amps 4 Dryer unit may be used with compressed air systems up to 120 psig 5 Dual column dryer uses a molecular sieve desiccant 2 2 2 3 Self Regenerating Dehumidification System Set Up The standard self regenerating dehumidification system is contained entirely within the chamber control section If house air is used a quick disconnect air fitting will be installed on the Chamber Side Interface Panel 2 2 2 4 Operation To operate the self regenerating system proceed as follows 1 Open the chamber vent by removing the supplied 1 25mm green Caplug 2 The Chamber Vent inside of the chamber is the 1 25mm opening on the right wall the green plug should be removed The vent passes through to the outside right wall the 1 25mm barb on the outside should also remain open 18 The Model 5478 is a positive pressure system Without adequate ventilation the System will pressurize the working space Pressurizing the Chamber is not recommended and may cause damage 3 Set the microprocessor humidity controller set point to a value below ambient humidity 4 Turn on the RH DECREASE switch on the front panel This will do two things a It will activate the dual column dryer It will begin producing dry air as soon as the RH DECREASE switch is turne
62. tems shipped with the Chamber The programmed values will control the Chamber within specifications For better control the user may adjust the values The values listed here are for standard chambers only Non standard units may have different values than those listed here The following settings are approximations that will allow any user to achieve good RH control at any set point approximately 42 0 depending on the specific conditions However as the user becomes familiar with each parameter and it s effect on RH control the user will be able to program the unit to control within ever tightening tolerances Control of 0 2 RH or better is achievable with this system tunE oFF The Autotune function may be used to help determine the optimum operating conditions for a given set of operating systems and chamber volume The Autotune operates using the Humidifier only The Dehumidification System will be disabled during an auto tune The Tune At Set Point At SP option is recommended with the Model 5518 Occasionally the message Tune Fail will appear in the microprocessor display after the unit attempts an autotune The user will need to clear the Tune Fail message and attempt another autotune To clear the message turn the Model 5518 Main Power Switch Off and then On again When power is re applied the message will no longer be displayed A Tune Fail may be caused by many variables However performing multiple
63. the PC be fitted with a Pentium processor although a 486 will work and is running WINDOWS 95 98 2000 XP or Windows NT programs A minimum of 16 MB RAM is recommended to run the program slightly less is acceptable together with sufficient free hard disc space to meet logging reguirements Because the controllers are stand alone they do not need PC supervision for their normal function and will continue to control the process unaffected by failure of any part of the communications loop When used with the Model 5518 Chamber the Temperature amp Humidity Microprocessor COMM PORTS are wired together in parallel One RS 485 COMM PORT common to both Controllers is located on the Side Interface Panel of the Model 5518 Chamber 43 6 1 6 2 Set up and Installation Refer to pp 2 amp 3 in the CALCOMMS Manual 6 1 1 RS 485 COMM PORT RS 485 is a half duplex serial communications link and is the standard most commonly used for industrial applications due to its high noise immunity and multi drop capability It enables a PC to communicate with up to 32 instruments over distances of over 1200 meters and requires the addition of an RS 485 interface card or a separate RS 232 485 converter A RS 485 USB converter is also available The RS 485 COMM PORT is a 9 pin subminiature D female connector located on the Side Interface Panel 6 1 2 RS 232 485 Converter The RS 232 485 Converter is not required if the computer is confi
64. uid Nitrogen Cooling System MICROPROCESSOR TEMPERATURE CONTROLLER 5 1 System Description 5 1 1 Controller Specifications 5 2 Controller Operation 5 2 1 Set Point Adjust 5 2 2 Heating System 5 2 3 Cooling System 5 3 Programming the Microprocessor Controller 5 3 1 Accessing the Programming Menu 5 3 2 LEVL C Level C 5 3 3 LEVL 1 Level 1 5 3 4 LEVL 2 Level 2 5 3 5 LEVL 3 Level 3 5 3 6 LEVL 4 Level 4 CALCOMMS COMPUTER INTERFACE 6 1 Set up and Installation 6 2 Operation 6 3 Logging and Charting CALIBRATION 7 1 Sensor Interface Board MAINTENANCE 8 1 Cleaning Humidifier Transducer 8 2 Cleaning Cooling System Nozzle WARRANTY 1 0 Model 5518 CONTROLLED ENVIRONMENT CHAMBER Many applications require a controlled environment for testing fabricating and or storage The Model 5518 Microprocessor Controlled Environmental Chamber is a completely integrated system fabricated from 0 375 clear and white acrylic that provides the user with excellent visibility inside the controlled environment section It includes glove ports equipment and sample access doors circulating fans lighting and accessory power outlets The standard Chamber is capable of precisely controlling temperatures from lt 32 135 F lt 0 55 C and humidity from 5 98 RH NOTE The entire humidity range cannot be obtained at all temperatures due primarily to dew point considerations as shown in Figure 1 0 1 ETS Model 518 Performance Chart
65. ust 1 Press and hold the button The letters C or F depending on set up will appear followed by the current set point value While holding the button the current set point value and C or F will alternately appear in the microprocessor display 2 To adjust the set point higher press the button To adjust the set point lower press the Y button 3 Release the button 5 2 2 Heating System 35 To operate the Model 5518 Heating System 1 2 3 Adjust the Temperature set point to a value above the ambient temperature Turn on the TEMP INCREASE switch on the front of the Control Panel This will not automatically apply power to the heaters Turning on the TEMP INCREASE switch only makes the heaters available to the microprocessor controller When the microprocessor activates the heaters the small green LED in the upper left corner of the Temperature display will illuminate The red neon light on the Fan Panel will also illuminate to indicate that the heaters are receiving power The controller will determine the amount of heating needed to maintain the desired set point in the enclosure If less than the full output capacity of the heater is needed the controller will provide pulses of power to the unit to limit the output The heater will be turned on and off cyclically to obtain an average temperature output lower than the full capacity of the heater
66. y Non standard units may have different values than those listed here The following settings are approximations that will allow any user to achieve good temperature control at any set point approximately 1 0 C depending on the specific conditions However as the user becomes familiar with each parameter and it s effect on temperature control the user will be able to program the unit to control within ever tightening tolerances Control of 0 2 C or better is achievable with this system tunE oFF The Autotune function may be used to help determine the optimum operating conditions for a given set of operating systems and chamber volume The Autotune operates using the heater only The cooling system will be disabled during an auto tune The Tune At Set point At SP option is recommended with the Model 5518 Chamber Occasionally the message Tune Fail will appear in the microprocessor display after the unit attempts an autotune The user will need to clear the Tune Fail message and attempt another autotune To clear the message turn the Model 532 Main Power Switch Off and then On again When power is re applied the message will no longer be displayed bAnd 2 0 Proportional Band for the heaters int t 1 0 Integral Time in minutes The integral time is responsible for calculating how much output should be coming from the heating and cooling Systems to maintain the desired conditions der t 1 Deriv

CONTROLLED ENVIRONMENT CHAMBER

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