Home

EC127 user manual - Sun Electronic Systems

image

Contents

1. 79 SECTION 7 SPECIFICATIONS wasecscscasesesonssinsonassei soveissonteasondsouetadesensteas enake OL SECTION 8 MAINTENANCE Renee vane ea ai OO INNER CHAMBER AIR CIRCULATION EVAPORATOR CLEANING 83 REFRIGERATION SYSTEM CONDENSER 83 SECTION 9 CHAMBER REPAIR a ana OD TEMPERATURE CONTROLLER SECTION REMOVAL AND 85 HEATER ELEMENT REMOVAL AND REPLACEMENT 85 FAILSAFE THERMOSTAT REMOVAL AND 86 REFRIGERATION SYSTEM CHARGING 86 VAC 3 WIRE SCHEMATIC WITH VAC COOL VALVE 87 VAC 3 WIRE SCHEMATIC WITH VDC COOL VALVE enake 88 220 VAC 3 WIRE SCHEMATIC WITH VAC COOL 89 220 VAC 3 WIRE SCHEMATIC WITH VDC COOL VALVE nana 90 SECTION 10 5 5005 91 SECTION 11 52 JS 4 27 0112 SECTION1 GENERAL INFORMATION INTRODUCTION Congratulations on your purchase of the EC127 Environmental Chamber Your new cham ber was manufactured under stringent guality control procedures to insure trouble free operation for many years of service If you should encounter difficu
2. 2 gt 17 LOCAL PROGRAMMING EXAMPLE kk 18 SECTION 3 OPERATION AND COMMAND OVERVIEW cssssssssssssssssscsscssessessessessesees 23 COMMAND OVERVIEW aia oh iG hii ae A je ie 23 CONTROL PANEL de lene 23 PARAMETERSENTRY 24 R5 232 422 SERJAL INTERFACE San jana 24 RS232 CABLE WIRING DIAGRAM FOR 127 enake 25 GPIB 1EEE 488 PARALLELINTERFACE a iii AM poniji eoe EE red kda 26 POWER HEAT AND COOL ENABLE ON OFF CONTROL 2 27 COOL BOOST TCO s n ani pitje RN di nes in NE SU edini 28 TEMPERATURE CONTROL 8 22202022 2 0 000000000000000000 00000 28 TEMPERATURE SAFETY LIMIT COMMANDS 222222222 2 1 2 1 0 000100000000000 000000000009 29 CONTROL LOOP PARAMETER COMMANDS 0 29 LOCAL PROGRAM COMMANDS 30 MODEL 1 COMPATIBILITY 5 31 DEVICE VO COMMANDS voc ae sleeves nine leni Vin ib Sada See kan NESE oes 31 SET DEFAULT SDER eu Sieg ate waa nanny aaa aaa ae 31 SET INTERRUPT MENU 51 RANA pe 33 REMOTE INTERRUPT CHARACTERS 33 PROBE CAL
3. 5 27 DESCRIP TON reeet Soviet Ai tess Age 6 OPERATIONAL MODES 6 USER PROBES osli V 6 FRONT PANEL 7 REMOTE GPIB OR RS232 422 OPERATION 7 127 FRONT VIEW iii iii E 8 EGC127 REAR VIEW isis is odse S jajo ea E s bats le ii pali ih tel hili 8 127 INNER CHAMBER VIEW 5 E 9 EC127 INNER CHAMBER AIR BAFFLE REMOVED 9 EC127 CONTROL SECTION SEPARATED 10 127 MAIN CONTROLLER AND SCANNER BOARDS 11 27 RIGHT SIDE PANEL REMOVED 12 27 13 127 FRONT PANEL za a Ne 14 SECTION 2 RECEIVING SAFETY AND INSTALLATION 00 0 15 INITIAL INSPECTION AND aken 15 LOST DAMAGED EQUIPMENT cs neje dd od 15 SAFETY CONSIDERATION S 15 127 CHAMBER INSTALLANON pn 16 INTRIAL START vt na ae Ba a nu SN BOE AR Ree hi eh eee es 16
4. 29 E 2 5 5 2904 BIT O 8 z O 8 14 1 d UJMUJUEA 30d TUNO NEUT SAD mois YSI 14 LOH JINId 29 EC127 ver 0112 88 220 V c 3 WIRE SCHEMATIC WITH V COOL VALVE JS 6002 Ge emiga PPA JegwnN Jupunsog 2215 91 ZHO9 0G 2 022 2193 SWALSAS OINONJOJTII NNS zo T to ONISNIANOD SN NOLLVTNOAIA NIM T ZA 00 LA 5 35 NO 38019 89 advSlivi TVLIN IS N ZZ ZZ t Q 1009 vA JATVA SSVdAd LOH ANIA 93 mM 55 SS ij T dav 1000 1009 415008 1003 1s008 1003 0 1 42153 za NI HOLIMSOMAJIN L olyZ SEvr MOGIS VSI LU MOTIS VSL GEA ov
5. 127 0112 220 3 WIRE SCHEMATIC WITH V VALVE 1 2 09 0 1 1800 8 dHUST ZHB9 0022 22154 5 315 5 9140415373 NNS NUJ LINN ONISNJUNODD Abe NOI 18 INOdID IY 01491034132 918 1 007 2 5055354409 Agee 7 meer 5 858 amp 5193 5 55 sme S AUX6 1 S AUX6 HAT HEAT WAT HEAT AHd 5 34981193 79130 18 339348 NI HD1IMSOAJIM 854 ae U Hd MS ESTE E 455855555 z o sad a 21 1000 T lt 1002 NIH 110 1000 819 NO MS 3 OO JI 15008 1009 i ind 15008 1002 466 20 559 lt 810 8 8 29 BAIA 15008 1002 19 01140 1 SSUJAHLOH R 8 14 NDZ ba 20 559 0109 8 BATA SSUdA 10 110 559448 0109 ta VIM 3702 N Meg BABE Ned 35075 559 0100 Ned 35079 2 1 SE N AJLUM Malem 009 q 8 aia 15908 071 48133 m 2 a MOTS 14 5 2904 29 ATW EC127
6. 15Vd Vog 354 NA av 9 E 87 27 0112 110 WITH V COOL VALVE 1 2 08 071 dDWEST ZHB9 ABTT 242154 SWJLSAS JINOJLIJIJ NAS 80553444029 LINN INISNJOINOJ 00 meer gt ABIT 919 NDILYTNOXID 19 855 NJIUJH ysg WAT HEAT HEAT 1N3N M 14951193 79134 18 SATA 1009 919 JAVA 15008 1002 15 01180 JAT SATA 5594 LOH 204121 194 559248 0102 200421 TA IZ S AUXx6 AUX6 JOH NO MS 4 COMP 1 S AUX3 1 S AUX7 S s aUx7 1 s AIR HEAT S AUX3 AIR HEAT 20 1002 19 ind 1002 819 z 5 20 18008 1002 ind 15008 7009 21 559 1 1 SS dAg 10H 20 550948 0703 110 559248 102 31492 55320 4 NIB JeAST NAD H Hud 38079 35012 009 GND 29354 NI HOLIMSOYIIW ZFAILSAFE AZLADJSNHUNI WASP 91 91 dJlUM 1019 20002 NEUT NEUT NEUT HOT 55 22 0 Sd 1 4 133
7. The Model EC127 contains interrupt assignment values for the local alarm serial interface and GPIB interface SRQ interrupt The values are stored in non volatile memory eliminating the need to reload after a power interruption The interrupt values may be set locally from the control panel by depressing the SINT ENTER keys followed by responding to the menu oriented questions on the control panel display with a YES NO or numeric response The format of the menu is as follows SINT Enter Set Interrupts Yes No BUZZ LP TIMEOUT Yes No BUZZ LP Done Yes No BUZZ Single T O Yes No INT LP TIMEOUT Yes No INT LP Done Yes No INT SINGLE T O Yes No DEVIATION INT Yes No CMD ERROR INT S Yes No BKPNT INTERRUPT Yes No P_POLL 1 8 0 NO ALL R s INT s OFF Yes No Enter Set Interrupt mode Enter Yes or No Enter Y to enable BUZZER after each temperature segment time out during Local Program execution Enter Y to enable BUZZER when the end of a Local Program is encountered Enter Y to enable BUZZER at the end of each temperature segment time out in single temp mode Enter Y to enable Time out Interrupts after each temperature segment time out during Local Program execution Enter Y to enable LP Done interrupt when the end of a Local program is encountered Enter Y to enable a Single Temp Time out interrupt at the end of each temperature segment in single temp mode Enter Y to enable DEVIAT
8. 5 to 5 Enter or 2 D A Output 1 0 to 5V 2 5 to 5 Enter or 2 D A Output 1 0 to 5V 2 5 to 5 Enter or 2 D A Output 1 0 to 5V 2 5 to 5 Enter 1 or 2 Serial Port 1 232 2 422 Enter 1 or 2 RS CHAR ECHO ON Y or N Baud Rate 1 9600 to 6 300 RS DTR CTS ON Y N Buzzer Volume O lt OFF to 3 Chart 1 on A Yes or No Enter Low Value Enter High Value Chart CH 2 on Yes or No Enter Low Value Enter High Value TRIG Scan Probe 1 K 2 J 3 T Enabled 0 8 2 32 Enter Y for serial port character echo Enter 1 thru 6 1 9600 BAUD 2 4800 BAUD 3 2400 BAUD 4 1200 BAUD 5 600 BAUD 6 300 BAUD Enter Yes for hardware handshake Enter 0 1 SOFT 2 MEDIUM 3 LOUD Chart chamber probe temperature on D A output channel A Enter Yes or No If entered YES the controller asks Enter Lowest value to chart in units for this channel Enter Highest value to chart in units for this channel Chart user probe on D A output channel B Enter Yes or No If entered YES the controller asks Enter Lowest value to chart in units for this channel Enter Highest value to chart in units for this channel Enter tolerance at which controller detects that the temperature setpoint is reached For information only can t change K type should be default for information only can t change 2 should be default EC127 ver 0112 SET INTERRUPT MENU SINT
9. Y N Y power on 2 Y N Y cmd error last command 3 Y N Y time out LED is 4 Y N Y waiting for WAIT1 timeout 5 Y N Y C1 is enables heat enable 6 Y N Y C1 is enabled cool enable 7 Y N Y valid SETI has been entered 8 Y N Y waiting for WAIT2 timeout 9 Y N Y C2 is enabled 10 Y N Y C2 is enabled 11 Y N SET2 has been entered 12 Y N Y lt DEVLI exceeded 13 Y N is ramping 14 Y N Y DEVL2 exceeded 15 Y N Y C2 is ramping 16 Y N Y C1 lt LOL1 17 Y N Y C1 gt UPLI1 18 Y N Y C2 lt LOL2 19 Y N Y C2 gt UPL2 20 Y N Y waiting ata BKPNT 21 Y N LP run mode 22 Y N LP remote store mode 23 Y N Y in local LP edit mode 24 Y N Y waiting to run LP at TOD 25 Y N Y GPIB bus timeout 26 Y N Y in local lockout Restrictions Remote only read only not stored in LP 70 EC127 ver 0112 STOP Function Terminate local program execution and single temperature segment execution Syntax STOP Description If in Local Program operation the STOP command terminates local program execution in the controller If running in single temperature mode then entering the STOP command terminates the temperature segment and sets SET lt NONE and WAIT FOREVER Restrictions None See Also RUN Example DELP 0 clear LP area 0 STORE 0 ready controller for accepting LP commands 22 send LP commands END terminate store operation LIST 0
10. 0 STORE 0 ready controller for accepting LP commands KEF send LP commands END terminate store operation LIST 0 display local program controller displays local program RUN 0 execute local program STOP terminate local program activity 72 127 0112 T Function Examine current chamber temperature in Syntax T Description The T command is a 1 controller compatible command which examines the present temperature associated with the chamber probe The response is always in degrees centigrade Restrictions Remote interface command only See Also TEMP C1 Example SET 25 0 Set current set temperature to 25 C After ramp period ended Examine current chamber temperature 25 1 Actual chamber temperature returned Examine current chamber temperature 25 1 Actual chamber temperature returned TEMP Function Examine current chamber temperature Syntax TEMP Description The TEMP command is an EC1x command which provides the means for a remote interface to read the present value of the chamber probe This value is normally displayed on the first line of the front panel LCD display The units for the chamber probe are set in the CAL menu for F C or K Restrictions Remote Interface command only See Also 1 Example TEMP read chamber probe 25 0 controller response 25 0 units EC127 ver 0112 73 TIME Function Set or examine time of day Syntax
11. 17 GROUND 2 TXD RS232 TRANSMIT DATA 3 RXD RS232 RECEIVE DATA 5 CTS RS232 CLEAR SEND 20 DTR RS232 DATA TERM READY 12 4TXD RS422 TRAN DATA 25 RS422 TRAN DATA 10 4RXD RS422 REC DATA 4 23 RXD RS422 REC DATA 9 CTS RS422 CTS 22 CTS RS422 CTS 11 DTR RS422 DTR 24 DTR RS422 DTR 25 When enabled following ASCII interrupt characters are sent out over serial port The interrupt character is followed by a carriage return line feed Interrupts will not be sent during a normal transfer of data SINGLE TEMPERATURE TIME OUT I COMMAND ERROR CMD ERROR LP TIME OUT LP DONE DEVIATION LIMIT UPL1 EXCEEDED LOL1 EXCEEDED POWER GOING DOWN POWER UP NO AUTO CONTINUE POWER UP AUTO CONTINUE BREAK POINT x N couo v GPIB IEEE 488 PARALLEL INTERFACE The EC127 chamber incorporates a IEEE 488 standard interface for communication with host controller The GPIB interface supports TALK LISTEN SPOL serial poll and PPOL parallel polling When CMD ERROR INT S are enabled via SINT menu the GPIB port sends a CMD ERROR SRQ interrupt on commands received with errors If command error interrupts are disabled then no response is sent to the GPIB port if command errors are detected In all cases the only data that is sent to the GPIB interface by the controller is that which is requested by a command received by the controller The GPIB port does not respond with OK after commands that do not send bac
12. 2 AN3 Analog Input Channel 3 AO 0 Analog Output Channel A AO 1 Analog Output Channel AO_2 Analog Output Channel C AO 3 Analog Output Channel RV 9 220 OHM Pull Up Resistor to 12VDC 10 11 GROUND 12 IL3 0 20mA Current Source LEAD 13 IL3 0 20mA Current Source LEAD 14 15 No connection Communication interfaces may read and write data from to the analog I O interface by issuing the following instructions Analog I O Interface I O Commands OUT3 analog output channel number 0 3 0 255 IN3 analog input channel number 1 3 Im EC127 ver 0112 37 PROBE INTERFACE The EC127 controller has 4 thermocouple connected to it Channel 1 is the chamber probe Channel 2 is the user probe Channel 3 and Channel 4 probes are used to sense internal temperatures of the refrigeration system Channel 3 and 4 probes are fixed K type thermocouples and are not user changeable Channel and 2 probe inputs on the Model EC127 accept several different types of sensors The type of probe and the calibration for the probe selected is accomplished by running the CAL menu from the local control panel refer to Section 3 The following represents the connections to the probe connector located inside the controller section for either the Chamber channel or the USER channel The factory default probe type is K narrow and most likely you will never have a reason to change the type PROB
13. 22 127 0112 SECTION3 OPERATION AND COMMAND OVERVIEW The Model EC127 is very adaptable to your test system requirements Whether issuing commands from local front panel keyboard or remotely from the IEEE 488 GPIB or RS 232 422 serial interface you have full control of all the Model EC127 capabilities This chapter starts off with a command overview section to assist users who are new to the operation of the chamber followed by sections which define in detail the operation of the Default Interrupt and Calibrate Menus Setting of the mechanical fail safe was covered in section 2 Section 5 contains an alphabeti cally sorted detailed description for all commands which is to be used as a detailed programming reference COMMAND OVERVIEW This section groups the various commands available for the Model EC127 by function and gives a brief definition for the command Consult Section 5 for a detailed definition on a particular command Commands from the local control panel described in the following sections may require several keystrokes followed by depressing the ENTER key Commands from the GPIB interface are terminated with the EOI and or a line feed character Command lines from the RS 232 422 interface may be terminated with a line feed or carriage return character or both carriage return and line feed characters Numeric values with leading and trailing zeros and spaces are accepted and integer fixed and floating point values
14. PANEL REMOVED 26 Pin Flat Cable To Front Panel Controller Board EC127 ver 0112 127 MAIN CONTROLLER AND SCANNER BOARDS 12 Power V sei Input _ Switching Controlle Sebi a Power Transformer Fuse User Probe Scanner Probe hamber Probe 127 ver 0112 11 12 EC127 RIGHT SIDE PANEL REMOVED Control Section pulled out 2 Valve Compa rtment EC127 ver 0112 127 0112 EC127 REAR PANEL REMOVED Heater Element Terminals a Mechanical Failsafe 4 t ni v me 4 A Aime 2 o Z ma Circuit Breaker Main Line 13 14 EC127 FRONT PANEL EC127 ver 0112 SECTION2 RECEIVING SAFETY ANDINSTALLATION INITIAL INSPECTION AND UNPACKING Inspect the shipping container for obvious damage If the shipping container is damaged then a written note on the bill of landing describing the damage should be made while the delivery person is still on the premises Unpack the EC127 and save all packing material in case the unit needs to be returned Verify the contents of the carton matches that of the items listed on the packing slip LOST OR DAMAGED EQUIPMENT If you determine that the goods described on the packing slip are lost or damaged first notify the transportation company to
15. Section 3 N GAS PURGE OPTION No Needle Valve N2 Gas Purge When product you are testing reguires a 1 8 NPT Nipple NI nja dry nitrogen environment to prevent water conden sation or oxidation the nitrogen gas purge option is useful This option provides access to purge N gas into the chamber through an 1 8 NPT nipple located on the back of the chamber PORT AND WINDOW OPTIONS Standard port and door options are available at the time of order Standard options include 1 2 3 and 4 diameter round feed through ports that can be mounted in the door and or sides of the chamber Hinged or a pull off door can be ordered as well as a window door Please call with your special requirements EC127 ver 0112 79 80 127 0112 SECTION 7 SPECIFICATIONS Chamber Volume Internal Dim Temperature Range With Cool Boost Option Temp Resolution User Probe Battery Backup TEEE 488 Bus RS232 Bus RS422 Bus Max Rate of Change without boost Airflow CFM Vertical Power Req Shipping Weight SAFETY Probe Malfunction Controller Malfunction Temperature limits EC127 ver 0112 2 7 cu ft 20 W x 12 Hx 19 D 30 to 200 C 40 to 200 C 0 02 deg Yes Yes Yes Yes Yes 5 0 minute 300 cu ft min 1500 Watts 120 lbs Open Short Probe Detection Hardware Watch Dog Timer Upper and Lower software limits and Adjustable Thermostat 81 82 127 0112 SECTION8 M
16. a program The other form of the breakpoint command displays the value of one of the I variables 0 9 which is useful for breakpoints that are placed within FOR NEXT loops Restrictions Breakpoints values displayed on front panel display To read over remote bus issue BKPNT command See Also BKPNT BKPNTC Example editing from the local keyboard EDIT 0 edit program 0 END controller response BKPNT100 set breakpoint 100 END controller response FOR 2 1 10 begin FOR NEXT loop END controller response BKPNTI2 set breakpoint for I variable 2 END controller response NEXTI2 end FOR NEXT loop END controller response END terminate program entry EC127 ver 0112 39 Function Remote bus command to continue from breakpoint Syntax BKPNTC Description When the BKPNT interrupt is enabled by the SINT menu and a local program is started via a remote RUN command then when a BKPNT is reached during local program execution the breakpoint interrupt is sent to the appropriate remote bus The host controller upon receiving the breakpoint interrupt may issue a BKPNT command to read the value of the breakpoint issue com mands and then issue a BKPNTC to continue local program execution Restrictions Remote only command BKPNT Function Remote bus command to read value of breakpoint Syntax BKPNT Description When the BKPNT interrupt is enabled by the SINT menu and a local program is started via a remote RUN com
17. brate Then the chamber is instructed to go to temp point 1 After stabilizing at point 1 the command is issued to offset the probe you are calibrating The chamber is then set to point 2 which should be 50 deg or more from 1 and by using the CALB command the gain is adjusted for the probe you are calibrating See cal to a standard section in this manual for an example NOTE Number 9 is the default cal access code If it is changed then the new access code number will need to be used in this command 42 127 ver 0112 CHANNEL 1 OUTPUT ENABLES CLOFF Function Disable chamber cooling Syntax CION ENABLE AIR HEATING CION ENABLE AIR COOLING C1OFF DISABLE AIR HEATING C1OFF DISABLE AIR COOLING Description These remote commands permit a remote interface to enable or disable the air heating or cooling functions Front panel switches are provided for these functions when running the chamber locally When editing local programs from the front panel keyboard depressing the switch on the front panel enters its function either ON or OFF If the opposite action is desired cancel the entry and re enter to get the correct action All local programs default to heat and cool enables ON at the beginning Restrictions None See Also CON COFF HOFF HON Example disable chamber heating CHANNEL 2 COOL BOOST OUTPUT ENABLES C2ON C2OFF Function Enables disables cool
18. display local program controller displays local program RUN 0 execute local program STOP terminate local program activity STOPE9 Function To perform a reset of controller software Syntax STOP key E key 9 key or STOPE9 Description The STOPE9 command will restore SDEF and SINT parameters to factory default settings clear all local programs and initialize all controller variables and data structures This command does not modify the sensor calibration data This command is a software reboot command and is useful if you suspect that the controller is not functioning properly After issuing this command the controller will go to power off When power is turned on a RAM ERROR message is normal CAUTION All local programs will be erased EC127 ver 0112 71 STORE Function Stores a down loaded local program from a remote interface Syntax STOREm or STORE m Description The STORE command allows a remote interface to down load a local program to the con trollers local memory where identifies one of ten possible local program areas 0 thru 9 Once down loaded local programs may be executed by issuing a RUN command Prior to downloading a program to the controller the local program must be cleared by using the DELP command Local programs can be displayed or uploaded by using the LIST command Restrictions Remote interface command only See Also LIST RUN DELP STOP Example DELP 0 clear LP area
19. for chamber to stabilize after reaching set point 8 Now enter CALBn 9 lt temp2 gt where 1 or 2 and lt temp2 gt is the meter temperature reading in current scale units Now you have both offset the probe and gain adjusted the probe you are calibrat ing to match your temperature meter 36 EC127 ver 0112 SECTION4 INPUT OUTPUT INTERFA CES AUX ANALOG I O INTERFACE The analog I O interface is useful for interfacing with sensors instrumentation and control devices The most common use of the analog output interface is for driving an analog chart recorder A communication interface may output 8 bit data to up to 4 different channels of analog output designated channel 0 3 In addition a communication interface may read an 8 bit value corre sponding to the analog voltage present on up to 3 channels of analog input designated channels AN_1 3 In the SDEF menu analog output channels may be independently defined as uni polar with a 5V output range or bi polar with 5V to 5v output range Analog output channel 3 pro vides a separate 0 to 20mA current source associated with the voltage output range of 0 to 5V uni polar Analog input channels accept a 0 to 5V input The A D and D A data is 0 at low level and 255 at high level The pin assignments for the analog I O interface are as follows Analog I O Interface 12 DB15 PIN DESCRIPTION No Connection ANI Analog Input Channel 1 AN2 Analog Input Channel
20. obtain the correct procedure for returning merchandise for repair or replacement Then call Sun Systems for a return authorization number so that we may best handle the merchandise when it is returned SAFETY CONSIDERATIONS Please take a moment to read the following safety precautions If for any reason you do not fully understand the meaning of the cautions contact Sun Systems customer service before proceed ing CAUTION Before placing the chamber into normal service set the bimetal fail safe sensor This will be covered in detail shortly CAUTION Disconnect all electrical power sources before attempting any type of access or service to the chamber to prevent electrical shock CAUTION Always operate the chamber with the case grounded to earth ground The ground pin on the line cord is wired to the chamber case Do not defeat its purpose Verify that the power outlet to be used has an earth ground and meets your local electrical codes CAUTION Verify that the source of electrical power is compatible with the manufactured configu ration of the chamber indicated on the rear of the unit Check both voltage and current rating of your line outlet CAUTION Avoid personal contact with the interior portions of the test chamber area to prevent burns from heat or cold CAUTION Operate the chamber in a cool well ventilated area The refrigeration system requires unobstructed air flow around the chamber for cooling CAUTION Do no
21. opposite action is desired cancel the entry and re ENTER to get the correct action All local programs default to CON at the beginning Restrictions None See Also COFF HON HOFF C1ON CION CLOFF C10FF Example CON Enable chamber cooling operation 44 EC127 ver 0112 Function Examine the present control value Syntax CSETI Description The CSET1 command allows for examining the present value temperature that the control ler is attempting to control to During ramping this value is alternatively displayed on LINE2 of the front panel LCD display Restrictions None See Also C1 TEMP Example assumes scale in degrees C 1 10 define temperature segment RATE1 10 C m WAIT1 30 wait 30 min examine present temperature 25 0 controller response 25 0 C SET1 35 0 set new final temperature 35 0 C wait 30 seconds CSET1 examine present ramp target temperature 30 0 controller response 30 0 C EC127 ver 0112 45 DELL Function Delete current line during local program edit Syntax DELL Description The delete line DELL command allows for deleting program lines during local program editing on the front panel keyboard The line currently displayed will be deleted when the DELL command is entered Restrictions Local front panel command only See Also DELP Example EDIT 2 edit local program 2 GOSUB 0 controller response first line of LP DOWN ARROW use up down a
22. slo ed iii Neg eas di dela oe NS SVA ad tes 65 SCALE ponjo tai ren oe a aa 66 ENA ME RS Ne Sie a ale ee PADE RE ey UNI en eee eI ae 67 SETU tiki ee oje 68 SIND NE A O AO OO STNA NOV 69 STATUS ra ek AA a bedni in deti 70 STOP neso uh E E NR dali 71 STOPES os a penton Si Pok ak 71 a Rot Rig Rata RA ei Ra ae 72 Apa e tn 73 NR PS ST Sate Lee SIN SJE PIR NIK NAL ANANAS SS a VN IE ee 73 TME A oi NE A ril SR ni E 74 ei es peers Eee ih elise 74 nine ina ini PARO aud 15 75 pene E viii 70 Ni Ai eat Mek Rain Nala adie TI NA Sol Na ke 78 SECTION 6 127 OPTIONS una a Ai POWEROPTIONS none Bask ve Reed eld tih 79 EC127 ver 0112 3 COOLING OPTIONS nie kt aaah ae tS eden ne 79 N2 GAS PURGE OPTION NO NEEDLE 79 PORT AND WINDOW OPTIONS apa bina ao
23. suction service valve is the one nearest the rear panel To be sure of the charge reclaim any refrigerant in the system then slowly fill one pound of R404a into the system The charging is done with the compres sor not running by charging into the high side 86 EC127 ver 0112 110 V WITH V COOL VALVE sb 35545 Cebl VI 7580681 155 ZHDY IVA SIT DUI SWALSAS DINNLIJTI NNS 3 W09 aly NOILYWIAII TA JINT LLVA oor 007 ANIN MS NV ZZS k 7095 A AWA SSVJAH LOH ZA JATVA SSVdAH 0702 TA asia 5 Nada AIWAN 9 5 1 0003 MONTEE NNN Le tare arr aa ss ss 3 uae HHH 7 2 35075 z aava ome tini v HHH aiva dav 70544052 42123 N aaya EHH NJIVA N LOH 9105 Ag CIJA E saadwor DVA
24. to for ever For best operation the temperature segment should be entered RATE SETI then Waitl Restrictions Range from 99 59 59 to 00 00 01 See Also SETI SET RATE WAIT Example RATE1 10 define temperature segment rate 10 C min WAIT1 00 10 30 waitel0 min 30 sec examine current chamber probe temperature 25 0 controller response 25 0 C SET1 35 0 set new temperature 35 C after 1 minute set temperature is reached wait period begins after 1 more minute WAIT1 examine wait setting 00 09 30 controller response 9 min 30 sec remaining EC127 ver 0112 77 WAIT Function Syntax Description Set or examine the temperature segment wait period WAIT hh mm ss WAIT mm WAIT F OREVER WAIT set wait in hours minutes seconds set wait in minutes only mm 00 to 59 set WAIT to forever examine current wait setting The WAIT command provides timing for the length of time the controller has maintained the set temperature The AT SET TRIGGER variable in the SDEF menu determines when timing is started Once the wait period begins the wait time continues regardless of changes in chamber temperature When running local program the next command in the program is executed after the wait period has timed out In single temperature mode the controller continues to maintain the set temperature after the wait period timeout During the wait period examination of WAIT returns the
25. upper temperature limits prevent setting temperatures in violation of the limit setting In addition upper and lower temperature limit commands shall generate an interrupt to the active remote device if the chamber exceed one of the temperature limits If the chamber tempera ture exceeds the upper temperature limit the controller will automatically turn off chamber heating If the chamber temperature exceeds the lower temperature limit the controller will automatically turn off chamber cooling The deviation limit generates an interrupt to the remote interface if enabled in the SINT menu if the chamber temperature exceeds the tolerance you specified via DEVL command LOLIznnn n Set chamber lower temperature limit LOLI Examine lower temperature limit UPL1 nnn n Set chamber upper temperature limit Examine upper temperature limit DEVL1 nnn n Sets maximum chamber temperature deviation limit DEVLI Examine deviation limit CONTROL LOOP PARAMETER COMMANDS The Model EC127 permits the user to modify PID characteristics with these commands When examining PID coefficients P I and D are displayed approximately 3 seconds apart with the value following a P I and D on control panel display These commands typically apply to unigue circumstances which involve varying loads of mass or radiant power The PID coefficients are set at the factory for normal operation If it is necessary to change the default settings SUN can provide a P
26. 6 i sat DAVNE rho ANN Is ce a 46 sitni eat Sen be etina 47 Beh ote Rae ie Balin ees BRE 48 Ren ei ine E bej pues ika oa ra ajo ques 49 FOR NEXT NE se ee DNA A A oe a AR ae a 50 GOSUBI A 51 TOBE GN ote eed GUE ER I NE i ee Ee el aah 52 lene pause 52 VARIABLES Ge MA NA NA RV A ee ee ties 53 53 54 pli Polni po 54 55 55 56 OBE 56 Oi NA hod MASNI VR RI MAIN EI ore 57 ina obi Penn 57 ats tati 59 59 IMI Nr RN Ue 60 60 eee SEN SEN MEN ABER Ce kA RI ehh S Rahne BERS 61 JA ENI 62 NA a ANNO ad MEN EDEM RR JE 63 64 sija Rap vedeli luni
27. AINTENANCE The EC127 chamber was designed to reguire minimal maintenance The only two areas that reguire attention are the following First keep the air inlet at the inner chamber evaporator coil clean and unobstructed Secondly to periodically clean the refrigeration condenser coil that is located in the bottom compartment INNER CHAMBER AIR CIRCULATION EVAPORATOR CLEANING The inner chamber evaporator must be kept clean and unobstructed to allow proper air flow circulation inside the chamber To clean the evaporator pick out any foreign material that may have lodged in the evaporator coil fins Then use low pressure shop air to blow away small particles when necessary REFRIGERATION SYSTEM CONDENSER CLEANING The refrigeration systems condensing coil is located in the chamber bottom section left side A cooling fan blows room air over the condensing coil and the compressor to cool them If dust collects on the condensing coil heat transfer from the coil can be reduced thus causing loss of refrigeration efficiency Therefore periodic cleaning of the condenser is recommended How often the condenser needs to be cleaned will be a function of how dusty your area where the chamber is being used is The chamber controller monitors the compressor temperature during operation If the compressor temperature over heats the controller will automatically shut the compressor off for 3 minutes and display a ES error message on the front panel LCD for 10 sec
28. BRAT ON MANU 5 eni 34 iN el USE oh en pie aide NI eh np eal 35 SECTION 4 INPUT OUTPUT INTERFACES I7 AUX ANAL OG VO NT RAA kO E e a E 37 PROBE INTERFACE a a oe statin NU NA A la Ni ea 38 CONNECTION DIAGRAM FOR PROBE SENSOR 2 24240200000 0 000000000 38 SECTION 5 DETAILED COMMAND 8 0 4 30 A A EO TO Bite geet REN 39 Sis hee bee BS Ate Rie At aA 40 2 EC127 ver 0112 Sen redi nA nei id A Si da 40 EEA AE AA NA ees PG ATA ROA EO 41 CRES ln SA in a Ren ale ia Rob pause ke tni da ke EE 41 ANA AEO MNA nd hs NANESE MO RTU NS iki 42 CALEN CALAN ee 42 CION 43 E2ON C2OB 43 SARNO E eae 44 ne Stein eerie vanes ei ii eee 44 BN as ENI Ej 45 ua E ni be AA eb E na di bb Srb nut ht enih 4
29. BY USE OF THIS PRODUCT OR FOR ANY INCIDENTAL DAMAGES OR FOR ANY CONSEQUENTIAL DAMAGES BEFORE USING PURCHASER SHALL DETERMINE THE SUITABILITY OF THIS PROD UCT VIA THIS DOCUMENT FOR HIS INTENDED USE AND PURCHASER ASSUMES ALL RISK AND LIABILITY WHATSOEVER IN CONNECTION THEREWITH NO STATEMENT OR RECOMMENDATION NOT CONTAINED HEREIN SHALL HAVE ANY FORCE OR EF FECT UNLESS IN AGREEMENT SIGNED BY AN OFFICER OF SUN ELECTRONIC SYS TEMS INC EC127 ver 0112 5 EC127 DESCRIPTION The Model EC127 subjects objects placed in chamber area to either heated or cooled air which circulates from the intake in the rear of the test chamber area up and across the roof of the test chamber inside a baffle and vertically downwards back into the test chamber area Inside the test chamber area baffle resistance heaters heat the circulating air and the refrigeration systems evaporator cools the air The controller in the Model EC127 automatically maintains the desired temperature and rate of change of temperature in the chamber test area The controller uses Propor tional Integral and Derivative PID control technigues If necessary you may tailor the characteris tics of the PID algorithms independently for both heat and cool The Model EC127 is instructed to control temperature either by issuing single segment control commands or by writing and executing local control programs which are stored in the controllers battery backed RAM Single commands and programs m
30. E TYPE CONNECTION INFORMATION 2 WIRE RTD PIN 1 RTD OUT PIN 4 RTD IN Gump 3 to 4 3 WIRE RTD PIN 1 RTD 3 4 RIDIN 4 WIRE RTD PIN 1 2 RTD OUT PIN 3 4 RTD IN THERMOCOUPLE PIN 7 LEAD PIN 6 LEAD SOLID STATE PIN 5 LEAD PIN 8 LEAD CURRENT 20mA PIN 5 LEAD PIN 6 LEAD 5 PIN 7 LEAD PIN 6 LEAD RTD SS 2 WIRE Si 2 E ADD 2 IC 0 20mA PROBE _ CURRENT 5 ai 0 5 H LIJE Q 6 2 gt THERMOCOUPLE 9 7 Os PROBE SENSUOR CONNECTIONS CONNECTION DIAGRAM FOR PROBE SENSOR 38 EC127 ver 0112 SECTION 5 DETAILED COMMAND DESCRIPTIONS BKPNT Function Local program breakpoint or pause command Syntax BKPNTnnn display number nnn at breakpoint BKPNTIm display I variable value at breakpoint Description The breakpoint command allows for local program operation to be suspended until the ENTER key is depressed on the front panel display or until the remote controller issues a BKPNTC command This command permits program debugging by providing convenient pauses in local program execution such that an operator may examine local program performance and is also useful when a host controller may wish to perform I O at a point in the local program One form of the breakpoint command displays a number on the front panel display when encountered which is useful for identifying different breakpoints within
31. ID Application note containing an instructional overview on how to set the PID coefficients for a particular chamber and load PID1 n nn n nn air Heat PID coefficients D PID1 Examine Heat PID coefficients PID1 n nn n nn Set Cool PID coefficients P I D PIDC Examine Cool PID coefficients PWMP nn Set PWM period 2 to 30 seconds PWMP Examine present PWMP value EC127 ver 0112 29 LOCAL PROGRAM COMMANDS The Model EC127 provides commands to control the flow of local programs which permit automatic test operation by the chamber Up to 10 programs may be entered into the controller either from the local control panel or from either the GPIB or RS 232 422 interfaces Programs may call other programs as subroutines with the GOSUBn instruction The Model EC127 provides 10 global integer variables designated the letter The variable may be used in a FOR In NEXT In statements for multiple pass loops the variable may be used in IN and OUT instruction for communication with Model EC127 I O interfaces and it may be used in an arithmetic expressions containing additions and subtractions The END instruction designates the end of a program or subroutine And the red END command is used to terminate the edit mode A program is entered into the Model EC127 locally from the front panel by using the EDIT m function where m is the number of the program 0 thru 9 Programs may be down loaded
32. ION Interrupts Enter Y to enable Command Error Interrupts Enter Yes to enable breakpoint Interrupts Enter 0 to disable parallel poll or 1 thru 8 to set bit position for parallel poll Enter Yes or No Cal Menu ACCESS Code NUMBER Enter number 0 to 9 REMOTE INTERRUPT CHARACTERS Condition EC127 ver 0112 Serial Port GPIB Port HEX 33 serial poll result No Interrupt n a 00 Single T O INT I 41 Command Error INT CMD ERROR 42 LP Time out INT P 43 LP Done INT E 45 DEVIATION INT D 46 OVER Temperature INT O 47 UNDER Temperature INT U 4A GPIB Lock up INT n a 4F POWER Going Down none POWER Up no auto cont Z none POWER Up auto cont X none BKPNT B 50 PROBE CALIBRATION MENU For reading the chamber and user probes the Model EC127 contains two electrically iso lated high performance probe front ends capable of interfacing to a variety of different probe types This menu permits you to select a probe type calibrate the probe and to select the units of measure for each probe This menu is only used for the chamber and user probes The type of probes pro vided by the factory are K type narrow range Note that the user will probably not need to use this menu for actual probe calibration Please see cal to a standard calibration commands that follow for user periodic probe calibration CAL Enter CAL mode NOTE After CAL is entered the EC127 will display the current types of pro
33. MODEL 127 TEMPERATURE TEST USER MANUAL Covers Model EC127 Environmental Chamber The information in this document has been carefully checked and is believed to be entirely reliable No responsibility however is assumed for inaccuracies Further more such information does not convey to the purchaser of the product described any license under the patent rights of SUN ELECTRONIC SYSTEMS INC or others Sun Systems strives constantly to improve the guality and performance of all of its products in design construction and cost As a conseguence SUN ELECTRONIC SYSTEMS INC reserves the right to change specifications or other data contained herein without notice Any software firmware designs and any other programs in Sun Systems products remain the sole property of SUN ELECTRONIC SYSTEMS INC and may not be copied by any means Purchase of said product constitutes agreement that software rights remain to the benefit of SUN ELECTRONIC SYSTEMS INC Upon purchase Sun Systems grants perpetual license for use by the customer Copyright NOVEMBER 1995 by SUN ELECTRONIC SYSTEMS INC REVA 0112 Sun Electronic Systems Inc Tel 321 383 9400 info sunelectronics com Contents SECTION 1 9 9240 040000 O INTRODUCTION seti pie bie ie 5 LIMITED WARRANTY INFORMATION osa obod RADA
34. Nj k In Read input port number j address into integer variable In In read value of integer variable In OUTJ k I Write to output port number j address data An I variable may also be used in data field NOTE Decimal SET DEFAULT MENU SDEF The Model EC127 contains default values which may be tailored to your individual test system reguirements The values are stored in non volatile memory eliminating the need to reload after a power interruption The default values may be set locally from the control panel by depress ing the SDEF ENTER keys followed by responding to the menu oriented guestions on the control panel display with either a YES or NO response or a numeric value As you run the menu s the current settings are shown within parentheses To keep the current settings and go to the next prompt just press the enter key The format of the menu is as follows green SDEF then ENTER sto run Set Default mode EC127 ver 0112 31 Set Defaults Y N Enter Yes or No GPIB Address 0 30 Enter GPIB address GPIB Lockup Time 2 59 5 Enter GPIB interface max Time out Pre Time 0 59 sec Power Down Restart 0 59 min lockup time If Time 0 then GPIB Lock up interrupts are disabled Enter GPIB SRQ or Serial Interface early interrupt generation before actual wait period time out Disables automatic restart of controller above set minutes D A Output A 1 0 to 5V 2
35. S 232 or RS 422 serial interfaces Local keyboard function may be unlocked thru the use of the RTL command Local keyboard lockout operation for host processors communicating over the IEEE 488 interface is bus interface command The syntax varies according to the particular host computer Restrictions RS 232 422 remote interface command only Each host GPIB interface uses unique syntax for local lockout commands See Also RTL Example LLO lockout local keyboard run sensitive testing RTL unlock local keyboard 54 EC127 ver 0112 LOL1 Function Set or examine the lower temperature limit Syntax LOL1 nnn n Set lower limit LOL1 Examine lower limit Description The LOLI command allows for setting the lower temperature limit which is the lowest temperature valve that the controller will accept as a setpoint If the chamber probe temperature should ever go below the LOLI setting the cool enable will be turned off automatically An inter rupt will also be generated if enabled Restrictions Temperature values for the LOL1 command must range between 50 C and the UPL1 setting See Also UTL LTL Example If scale is set to C LOL1 20 0 set LOLI to 20 C LOL1 examine LOLI 20 0 controller response 20 C LTL Function Set or examine the lower temperature limit Syntax LTL nnn n u Set LTL where u variable units C F K LTL Examine LTL default units Description The LTL command is an EC1x compati
36. TIME hh mm ss set time of day TIME examine present time of day Description The TIME command is useful for documenting report outputs and for starting local pro grams at a specific time of day Time is entered and displayed in a 24 hour format 1 hours hh range from 00 to 23 minutes mm range from 00 to 59 and seconds ss range from 00 to 59 Restrictions None See Also RUN mTIME hh mm ss Example TIME 13 30 00 set time to 1 30 PM TIME examine time of day 13 30 00 controller response TIMEE Function Reads the accumulated elapsed time in hours that the chamber has been running Syntax TIMEE examine accumulated elapsed hours Description The TIMEE command is an EC1x compatible command which keeps track of the amount of time in hours that the chamber has been running The elapsed time is saved in EEROM to protect against RAM memory loss The time is updated whenever the unit is turned off or when a TIMEE command is received and at least one hour has elapsed since the last update Restrictions None Example TIMEE examine elapsed hours 32 37 controller response is 32 37 Hours 74 EC127 ver 0112 UPL1 Function Set or examine the upper temperature limit Syntax UPLI lt nnn n set the high temperature limit 205 max to see what upper limit is set for Description The UPL1 command allows setting the upper limit in current chamber probe scale that a set temperature can be set If an attempt is mad
37. are converted as required Commands are not case sensitive If an error is made during command entry either locally or remotely a COMMAND ERROR message is displayed To determine the cause of the error you may press the Key followed by the ENTER Key from the local keyboard or enter from a remote interface The controller will pro vide a 2 line response The first line will be a copy of the last command received The second line will be either a pointer to the error or an explanation of the error If there was no error in the last command received the controller will respond with a two line OK OK message CONTROL PANEL OPERATORS To permit easy command entry and local program generation the following operators on the local control panel permit command entry command cancellation menu decisions single command line editing during STOP mode and program editing during EDIT mode UP DOWN ARROWS editing during Local Program editing DELL Delete current program line DELP n Delete local program number LEFT ARROW Character backspace during command entry CANCEL Cancels present command entry EC127 ver 0112 23 ENTER JEnters command into Model EC127 controller inserts a line into the local program in edit YES NO Operators for SDEK SINT and CAL menu s PARAMETER ENTRY Parameters are used for numeric data entry delimiters and function operators in command lines 0 9 Numeric data depicted as n
38. ay be issued from either the local control panel located on the front of the chamber or remotely from either the RS 232 422 serial interface or the GPIB interface OPERATIONAL MODES Temperature testing usually involves testing an object at one or several different tempera tures In the case of more than one temperature the rate of change from one temperature to another and the time waiting at a particular temperature are considerations In the single temperature mode the Model EC127 accepts single commands defining an individual temperature segment containing rate of change from the present temperature to the final temperature wait time at the final tempera ture and final temperature setpoint information At the end of a wait period notification is given to the source of the command If multiple temperature segments are to be performed by the Model EC127 automatically the Model EC127 can be programmed by entering the EDIT mode and the program can then be executed by entering the RUN mode The Model EC127 stores up to 10 pro grams into battery backed memory The number of temperature segments resident in each program is only limited by the Model EC127 s controller internal memory space Programs can also call other programs as subroutines The Model EC127 contains setup modes which are menu driven on the controllers front panel The CAL mode permits selection of temperature scale probe type and probe calibration for both the chamber and USER
39. beginning value until the beginning value is equal to or greater than the ending value or decrements the beginning value when the minus option is used until the beginning value is equal to or less than the ending value The number of loop executions is equal to the absolute value of the ending value minus the beginning value Without regard to the beginning and ending values the loop is always executed one time FOR NEXT loops may be nested four deep when considering the first loop as nest 1 Restrictions None See Also GOSUB Example DELP 2 clear program 2 STORE 2 load local program 2 FOR 15 1 5 FOR I variable 5 step 1 2 3 4 FOR 5 15 FOR I variable 2 5 I variable 5 dec step 5 4 3 2 Pass 1 step 5 4 3 Pass 2 step 5 4 Pass 3 step 5 Pass 4 BKPNT I2 set breakpoint display I variable 2 NEXT I2 end FOR NEXT nest 2 NEXT I5 end FOR NEXT nest 1 END end program store RUN 2 run program 2 When the program is run the breakpoint value will display the step sequence for the FOR NEXT 12 variable loop 50 EC127 ver 0112 GOSUB Function Execute local program as a subroutine Syntax GOSUBm or GOSUB m Description The GOSUB command allows local programs to be called by other local programs as sub routines At the end of a local program called by a GOSUB command execution commences at the command following the GOSUB command in the calling program Nesting is supported for four levels of nes
40. bes that are connected Type K from the factory CAL Probes Y or N Enter Y if you really want to calibrate probes Enter N if you only desire to change temperature scale for the CHAMBER and or USER probe CAL Chamber Probe Y or N Enter Y to calibrate chamber probe ENTER CAL ACCESS CODE At this point the menu is asking for an access number to lessen the chance of unauthorized entry into the CAL routine The default is 9 and can be changed in SINT menu 385 RTD Y N DIN 43760 392 RTD Y N J Thermo Narrow Y N J Thermo Wide Y N K Thermo Narrow Y N K Thermo Wide Y N 34 EC127 ver 0112 Solid State Y N Voltage Input Y N Current Input Y N if temperature probes was selected Probe at ICE WATER Y N set probe to 0 deg C Probe at 100C BOILING WATER Y N set probe to 100 deg Temperature Units 1 lt C 2 3 K Enter 1 2 or 3 if voltage or current was selected Low Level Input Y N supply low level signal to front end Enter Low Value enter low end process value High Level Input Y N supply high level signal Enter High Value enter high end process value repeat same process as above for user probe If a NO answer was given to probes prompt then you are asked if you wish to change the units of measure for each channel CAL TOA STANDARD Cal to a standard allows for fine calibration to your in house temperature reference instru ment These CAL commands allow for si
41. ble command which allows for setting the lower tem perature limit which the controller will attempt to control The units for the LTL command are those as selected in the CAL menu for the chamber probe or the optional u units The optional u units can be accepted remotely only and will be converted automatically to default units Restrictions Temperature values for the LTL command must range between 200 C and the UTL setting See Also UTL UPL1 LOLI Example If scale is set to C LTL 100 0 set LTL to 100 C LTL examine LTL 100 0 controller response 100 C EC127 ver 0112 55 M Function Set or examine the current wait at temperature time Syntax nnn nM Set the temperature segment wait time M Examine the current temperature wait time Description command is a 01 controller compatible command which either sets the current temperature segment wait time sometimes referred as soak period or allows a remote interface to examine the current setting When setting wait times nnn n represents the wait time in minutes If wait time is equal to forever returns 19999 Restrictions Remote command only See Also WAITI WAIT Example 12 1M Set wait time for 12 1 minutes M Examine wait time 12 1 Response from controller WAIT1 Examine wait time with WAIT command 00 12 06 Response from controller OFF Function Turn off chamber power Syntax OFF Description The OFF command turns off the power t
42. boost option Syntax C2ON enable cool boost option 2 disable cool boost option Description These remote commands permit a remote interface to enable or disable the cool boost option Restrictions Only operational with optional cool boost feature EC127 ver 0112 43 Function Disable chamber cooling Syntax Description The COFF command is an 1 controller compatable command which permits a remote interface to disable chamber cooling by the controller The front panel COOL switch also disables controller cool function when depressed if cooling was enabled When editing local programs from the front panel keyboard depressing the COOL switch on the front panel ENTERs either CON or If the opposite action is desired cancel the entry and re ENTER to get the correct action local programs default to CON at the beginning Restrictions None See Also CON HOFF HON CION C1OFF Example COFF disable chamber cooling CON Function Enable chamber cooling Syntax CON Description The CON command is and EC1x compatible commamd which permits a remote interface to enable chamber cooling operation The COOL switch located on the front panel can also enable chamber cooling operation if depressed when cooling is disabled When editing local programs from the front panel keyboard depressing the COOL switch on the front panel either CON COFF If the
43. d Local program execution may be prematurely termi nated by issuing a STOP command Restrictions None See Also RUN EDIT STOP STORE LIST END Example This program lists the current program in local program 0 from a remote interface and then prepares for executing the program at 5 00 PM LIST 0 list local program 0 controller response FOR 2 0 10 set FOR loop for 10 loops 1 10 define temp segment 1 RATE1 10 C m 1 15 wait 15 minutes SET1 55 0 set final temp to 55 0 C SET1 125 0 define temp segment 2 rate 10 C m wait 15 minutes final temp 125 0 C NEXT 12 mark end of FOR loop 12 END mark end of local prog and end of STORE RUN OTIME 17 00 00 run local prog 0 at 5 00 PM 64 EC127 ver 0112 S Function Transmit and receive data from the GPIB to the RS 232 422 Serial Interface Syntax ISSS SSS transmit string sss sss to the serial intf 5 receive string from serial interface Description The S command 15 a 1 compatible command which allows the GPIB interface to transmit ASCII data to the RS 232 422 serial interface or receive data from the serial interface Care should be taken that a serial device does not transmit data to the controller until an S command has been issued since data received from a serial device without an S command pending will be inter preted as command data for the chamber controller An S command is reguired for each string of characters termi
44. e to set a temperature above the UPLI limit a command error will result If the chamber temperature should exceed the UPLI setting the heat enable will be turned off thus disabling further heating An interrupt will be also generated if enabled See Also UTL LTL UTL Function Set or examine the upper temperature limit Syntax nnn nUTL TCO1 compatible set UTL in C UTL TCO1 compatible examine UTL in C UTL nnn n u Set UTL variable units UTL Examine UTL variable units Description The 01 compatible commands provide for setting and examining UTL in degrees cen tigrade only If temperature units are desired to be the same as that set in the CAL menu for the SCALE variable then the UTL nnn n UTL command formats should be used If the chamber temperature exceeds the UTL setting then an over temperature interrupt will be generated to the active remote interface and the heat output will be disabled Restrictions 1 compatible commands operate from the remote interface only See Also LTL UPL1 LOLI Example If scale is set to F 150 0UTL set UTL to 150 C UTL examine UTL in C 150 0 controller response 150 0 C UTL examine UTL in units of SCALE F 302 0 controller response 302 F EC127 ver 0112 75 Function Examine the version number of the software in the controller Syntax VER Description The VER command is an EC1x compatible command which allows the user to check t
45. efined by the command from the chamber present temperature to the temperature defined by the SETI command plus the time specified by the WAITI command to soak at the temperature defined by the SETI command The units accepted by the SETI command are those chosen in the probe CAL menu For best results a temperature segment should be entered as RATE1 WAITI then SETI Restrictions value set by the SETI command must range between the values set for LOL and UPL1 commands See Also RATEJ WAITI LOLI UPL1 SET RATE WAIT Example If SCALE for the chamber probe is in C RATEI 10 0 set ramping rate for 10 0 C minute WAIT1 5 set wait 5 minutes read present chamber temperature 25 0 controller response for example 25 0 C 5 1 35 0 set new setpoint for example 35 SETI examine present set temp 35 0 controller response after waiting 30 seconds read present chamber temperature 30 0 controller response up 5 in one half min 68 EC127 ver 0112 SINT Function Set or examine the set interrupt parameters Syntax SINT xxxxxxxxxxn Sets SINT parameters SINT where x is Y or N character where nis a digit from Oto 8 Examines the SINT parameters by returning an 11 character string where position Y all remote serial RS port interrupts off Y single timeout interrupt enabled Y deviation interrupt enabled Y Local Program LP timeout interrupt enabled Y Local Program LP done inter
46. ent Reverse steps 5 and 6 for installation FAILSAFE THERMOSTAT REMOVAL AND REPLACEMENT The failsafe thermostat is located internally on the rear of the chamber If replacement of the failsafe is deemed necessary follow the procedure below STEP 1 Unplug the chamber from the line voltage Insure that the interior of the chamber has had time to reach ambient temperature REMOVE CHAMBER BACK PLATE STEP 2 Remove the 6 screws located on the perimeter of the chamber back plate and care fully remove back STEP 3 Remove the fiberglass insulation which covers the failsafe thermostat Locate the thermostat and disconnect the 2 wires attached inline to the thermostat utilizing quick disconnect terminals STEP 4 Remove the 3 6 screws which hold the thermostat to the rear wall of the test chamber and remove the thermostat REPLACEMENT Reverse steps 2 thru 4 Calibrate the thermostat under the procedures described in section 2 of this manual REFRIGERATION SYSTEM CHARGING The refrigeration system in the EC127 chamber uses one pound of R404a HP62 environ mentally safe refrigerant The compressor uses POE oil NOTE for the warranty to remain valid any service to the refrigeration system must be performed by a service person recognized by Sun Sys tems To assess the refrigeration condensing unit remove the left side chamber cover Once the left side cover is removed you will see the suction service valve and high side service valve The
47. ep NEXT Im NEXT Im marks the end of the FOR loop Im nnnn integer Im to 16 bit signed integer value where m o thru 9 where nnnn 32767 thru 32768 GOSUB m GOSUB calls a program as a subroutine may be nested 4 deep where m 0 thru 9 30 EC127 ver 0112 End of program statement Or return if called LIST m List program to a remote interface STORE fm Store program from a remote interface MODEL TC01 EC0X COMPATIBILITY COMMANDS The Model EC127 provides limited upwards compatibility with our Model 1 tempera ture controller and our ECOx series environmental chambers as described below Consult your TCO1 manual for a complete definition of these commands nnn nC Set Chamber Temperature deg C Examine Chamber Temperature deg nnn nM Set Time at Temperature Wait time minutes M Examine Time at Temperature minutes T Examine Chamber Temperature in deg C always nnnUTL Set Upper Temperature Limit deg C UTL Examine Upper Temperature Limit deg C 1555 555 Transfer String sss sss received from GPIB to RS 232 422 interface S Transfer next string received from RS 232 422 interface to GPIB DEVICE I O COMMANDS The device I O commands permit communication from the local control panel or from host computer to or from the many I O devices resident in the Model EC127 Consult Section 4 for the proper format of the command for the particular device you wish to communicate with I
48. erational when the chamber has been ordered with the optional LCO2 or LN2 Cool Boost To enable cool boost from local front panel Press yellow Channel 2 down enable key LED will come on signifying that boost is enabled Press key again to disable boost LED will go off To enable cool boost remotely Send 2 to enable cool boost Send C2OFE to disable cool boost To enable or disable cool boost in a local program When in edit mode and at location in program where you wish to enable or disable cool boost press the Channel 2 down enable key Press enter if it is the function you want If you get the wrong function 1 2 when you want 2 press green shift CANCEL to delete that line and press enable key again to get correct enable disable function Press enter to store it in the local program TEMPERATURE CONTROL COMMANDS Temperature control commands allow you to set or examine temperature segment param eters A temperature segment in the Model EC127 is defined by the rate of change of temperature RATE from the present chamber temperature to the final temperature SET and by the amount of time to wait WAIT at the final temperature before continuing with the next temperature segment providing time out indication Upon detection of a SET command the controller uses the values as given by the RATE and WAIT commands and initiates the proper action to implement the next temperature segment For best operation ente
49. from a remote interface using the STORE command Command DELL permits deleting program lines during local edit DELP m deletes program m where m is 0 thru 9 A program is executed using the RUN m and prematurely terminated with the STOP command Debug assistance and host computer synchronization is provided with the BKPNT nn or BKPNT Im commands which permit the operator to place breakpoints in the program that suspend program execution until the enter key is depressed on the local control panel or until a remote BKPNTC command is received BKPNT nn displays the value nn and BKPNT Im displays the value of Im when encountered during local prog execution The remote BKPNT command is provided so that the host computer may determine the breakpoint value EDIT m EDIT program m m 0 thru 9 RUN m RUN program m m 0 thru 9 RUN mTIME nn program m at time of day STOP STOP all program execution DELL DELETE LINE currently being displayed during edit mode DELP m DELETE PROGRAM m m 0 9 BKPNT nnn BREAKPOINT suspends program operation and display Integer Bkpnt nnn value BKPNT Im BREAKPOINT suspends program operation and display current Im value FOR Im m 0 thru 9 starting integer value ending integer value FOR statement marks the beginning of a loop The Im variable is either incriminated default or decremented from the starting integer to the ending integer FOR statements may be nested 4 de
50. hamber will ramp to 40 deg and after being at the set temperature for 1 minute and 10 sec it will time out Time out 15 indicated via the buzzer and or the LED on the front panel In this single temperature setting mode the controller will continue to hold the SET temperature until instructed to go to another SET point The RATE setting will stay in effect until changed by another RATE command so if the RATE is going to be the same it is not necessary to enter it again If the time out buzzer feature is not needed it is also not necessary to enter a WAIT command Thus in the simplest case the only command needed is the SET lt number gt command when running in the single temperature set mode SETTING THE CHAMBER FAILSAFE The EC127 chamber has a redundant independent to the electronic controller latching over temperature protection circuit The redundant circuit consists of a bimetal adjustable temperature sensor and a remote trigger coil in the chambers power line breaker When the temperature in the chamber exceeds the bimetal sensor setting its contacts close and thus cause the rear panel breaker EC127 ver 0112 17 to trip off When the breaker trips power is removed from heating circuit compressor and bimetal fail safe sensor circuit The FAILSAFE LED on the front panel will light to indicate the FAILSAFE lockout state Power to the electronic controller is not removed however it is locked out of operation until the rear breaker is rese
51. he version of software that the EC127 chamber is running Version 1 06 and up will also display on the front panel when the unit is turned on Restrictions RS232 422 remote interface command only See Also Version number will also appear at the back of the first page of your EC127 user manual Example VER 76 EC127 ver 0112 1 Function Set or examine the temperature segment wait period Syntax WAITI lt hh mm ss set wait in hours minutes seconds WAIT1 mm set wait in minutes only mm 00 to 59 WAIT 1 F OREVER set WAIT to forever WAIT1 examine current wait setting Description For most testing applications it is necessary to control temperature to a set point and after reaching the set point stay there for some period of time The WAIT1 command determines the time that the controller will maintain the set temperature after the set temperature reached is within the value specified in AT SET TRIGGER variable in the SDEF menu Once the wait period begins the wait time continues regardless of changes in chamber temperature When running a local program the next command in the program is executed after the wait period is timed out In single temperature mode the controller generates time out indication then continues to maintain the set temperature after the wait period time out During the wait period examination of WAITI returns the time remaining in the wait period After the end of a wait time out the WAIT1 is reset
52. he interrupts may be turned off The parallel poll bit as set in the SINT menu can be used to increase interrupt service speed when there are a number of interrupting devices on the GPIB bus The following interrupt values are sent to the GPIB port Many of the interrupts may be disabled the SINT menu IEEE 488 interrupt values are the value received when a serial poll is conducted CONDITION HEX DECIMAL NO INTERRUPT 00 0 SINGLE TIME OUT 41 65 COMMAND ERROR 42 66 LP TIME OUT 43 67 LP DONE 45 69 DEVIATION INT 46 70 UPL1 EXCEEDED 47 71 LOLI EXCEEDED 4A 74 GPIB LOCKUP 4F 79 BKPNT 50 80 POWER HEAT AND COOL ENABLE ON OFF CONTROL COMMANDS These commands turn the Model EC127 main power on off and enable or disable the heat and cool functions On the Model EC127 control panel these functions have separate function keys The switches operate in a push on push off or alternate action fashion The indicator is on when the function is enabled The following commands are for remote operation only When the Model EC127 main power is OFF and the unit is plugged in the controller will only accept the ON com mand from a remote interface ON Model 27 main power OFF Turn Model EC127 main power off C1ON Enable air heat function C1OFF Disable air heat Function Enable air cool function C1OFF Disable air cool function EC127 ver 0112 27 COOL BOOST LCO2 AND LN2 Note This feature is only op
53. ictions Chamber dynamics limit the maximum ramping rate See Also SET WAIT RATE1 SETI WAIT1 Example If SCALE for the chamber probe is in C RATE 10 0 set ramping rate for 10 0 C minute RATE examine present ramping rate 10 0 controller response 10 0 C min TEMP read present chamber temperature 25 0 controller response for example 25 0 C SET 35 0 set new setpoint for example 35 C after waiting 30 seconds TEMP read present chamber temperature 30 0 controller response up 5 C in one half min EC127 ver 0112 61 RTL Function RS 232 422 Command to unlock local keyboard Syntax RTL Description The Return to Local RTL command may be issued from a host processor to unlock the local keyboard The RTL command only applies to host computers communicating over the RS 232 or RS 422 serial interfaces Local keyboard function may be locked thru the use of the LLO com mand Local keyboard unlock operation for host processors communicating over the IEEE 488 interface varies according to the particular host computer syntax requirements Restrictions RS 232 422 remote interface command only GPIB interface host computers use the IEEE 488 return to local command See Also LLO Example LLO lockout local keyboard run sensitive testing RTL unlock local keyboard 62 EC127 ver 0112 RUN Function Starts the execution of a local program Syntax RUNm or RUN m Description The RUN command initiates the executi
54. ill cause the chamber to go to 50 deg at a rate of 3 deg minute and stay there for 5 minutes After the 5 minutes at 50 deg the buzzer will buzz and BKPNT 1 will be displayed To continue from the breakpoint press ENTER The chamber will then go to 0 deg at a rate of 2 deg minute and stay there for 7 and one half minutes Then BKPNT 2 will be executed press enter to continue Then the above will be repeated 5 times by the FOR NEXT loop To enter the program in program 0 perform the following key strokes red SHIFT sto delete existing prog 0 if any DELP 0 blue ENTER red SHIFT create a program EDIT 18 EC127 ver 0112 0 blue ENTER free memory is displayed then line 1 is displayed if program is empty then END is displayed NOTE While in edit mode red up and down arrow keys allow you to move in local program The red DELL allows you to delete the current displayed program line A line can be inserted in front of the current displayed program line by entering the new line red SHIFT FOR 0 6 blue ENTER 1 WAITI ENTER SETI EC127 ver 0112 19 0 ENTER red SHIFT BKPNT ENTER WAITI ENTER SETI 0 ENTER red SHIFT 20 EC127 ver 0112 BKPNT 2 ENTER red SHIFT NEXT 0 ENTER red SHIFT END ENTER local edit now done To run the program green SHIFT RUN 0 ENTER EC127 ver 0112 21
55. ing or remote local program downloading Syntax END LP Description The END command terminates program editing when editing local programs from the local keyboard and terminates remote program downloading when using the STORE command from a remote host computer Restrictions None See Also EDIT STORE Example This example illustrates entering a local program from the front panel keyboard The local program consists of a call to LP 2 a breakpoint which displays the number 1 and a call to LP 5 EDIT 0 edit local prog 0 END controller response on LCD display GOSUB 2 enter prog call to local prog 2 END controller response BKPNTI enter breakpoint between calls to LP 2 and LP 5 END controller response GOSUB 5 enter prog call to local prog 5 END controller response END end local program editing EC127 ver 0112 49 FOR NEXT Function Loop definition command for local programming Syntax FOR Im lt Beginning Value gt lt Ending Value gt or FOR Im lt Beginning Value gt lt Ending Value gt or FOR Im lt Beginning Value gt lt Ending Value gt NEXT Im Description The FOR NEXT loop command provides looping capability for local program operation Commands contained within the boundaries between the FOR statement and the NEXT statement are repeated as defined by the FOR statement The beginning or ending value may be any integer value or an I variable value The FOR NEXT loop either increments the
56. k data since handshaking is a inherent bus feature Last command status can be determined through the use of the command or the STATUS command if polling is preferred over interrupts The SDEF menu allows you to set the GPIB address and the GPIB LOCKUP TIME which is the length of time that the controller will wait for the host to accept data before generating a GPIB LOCKUP interrupt The SINT menu also provides the ability to set up the parallel poll bit The bus signal pin assignments are as follows PIN SIGNAL PIN SIGNAL 1 DIO1 13 DIO5 2 DIO2 14 DIO6 3 DIO3 15 DIO7 4 DIO4 16 DIO8 17 6 DAV 18 GND 7 NRED 19 GND 8 NDAC 20 GND 9 IFC 21 GND 10 SRQ 22 GND 11 23 GND 12 SHIELD 24 GND LOGIC 26 EC127 ver 0112 The EC127 recognizes a line feed with or without EOI set or EOI set during last charac ter as an input line terminator The controller when talking will send a line feed with EOI set as the line terminator The chamber will pull the SRO line low if it needs to send an interrupt If the host computer does not perform a serial poll before another interrupt is generated then the EC127 will display SRO OVERFLOW on the front panel This message is to inform the user that interrupts have not been read by the host computer The message can be ignored if you do not wish to provide an interrupt handler in your host software Also by disabling interrupts in the SINT menu or via the SINT command t
57. loor right side Also unplug the 2 wire power input cable from the I O board The controller elec tronics is now free to be removed REPLACEMENT Reverse steps 1 5 HEATER ELEMENT REMOVAL AND REPLACEMENT The heating elements are located behind the air baffle located inside the test chamber area Follow the procedure below for removal and replacement STEP1 Unplug the chamber from the line voltage Insure that the heating elements and the interior of the chamber have had time to reach ambient temperature REMOVE AIR BAFFLE STEP2 Remove the 2 6 32 screws located at the top of the evaporator cover STEP3 Remove the 2 6 32 screws located on the ceiling of the test chamber that hold the air baffle REMOVE CHAMBER BACK PLATE STEP 4 Remove the 6 screws located on the perimeter of the chamber back plate and remove back EC127 ver 0112 85 HEATER ELEMENT REMOVAL STEP 5 Carefully remove the fiberglass insulation from the heater mounting area Remove the 6 32 nut and flat washer from each side of the heater element Remove the wired ring terminals from the heater element mounts STEP 6 Remove the next 6 32 nut and beveled washer from both mounting sides NOTE When re installing always place the wide part of the bevel washer towards the ceramic insulator Tighten the nut finger tight plus 3 4 of a turn or use 4 inch pounds of torgue REPLACEMENT Defective heater elements are replaced with new ceramic insulators and new heater elem
58. lt data gt where device number of ANALOG PORT is 3 where address of ANALOG PORT is achannel 0 to 3 where data of ANALOG PORT is a base ten number from 0 to 255 The A D to D A data is 0 at low level and 255 at high level OUT3 c x where c ischannel 0 1 2 or3 where x is base ten number from 0 to 255 The A D to D A is 0 low level and 255 at high level when 0 represents Ov for Ov to 5v output range low level represents 5v for 5v to 5v output range represents OmA for OmA to 20mA output range EC127 ver 0112 57 when x 255 represents 5v for Ov to 5v output range high level represents 5v for 5v to 5v output range represents 20mA for OmA to 20mA output range Note The unit will accept a data value larger than 255 ie 0 low value 255 high value 256 low value 511 high value 512 low value etc In order for the OUT3 command to work properly in a local program you must use an integer value from 0 255 Assuming 0 5V analog output range to obtain the integer value you need to pro duce the correct voltage you must divide the desired voltage by 5V and multiply this result by 255 Vint Vx 5 255 To obtain 1V 1 5 255 51 you would issue the command OUT3 2 51 and to produce 5V you would issue the command OUT3 2 255 5 5 255 255 Formulas to determine decimal numbers from 0 255 to provide desired voltage 0 5V Range desired ie V 0 x lt 0 X x 255 V 5V x 255 5 Fo
59. lties with the use or operation of your cham ber contact Sun Systems Customer Service Department between the hours of 9 00 and 5 00 EST As with all Sun Systems products we would appreciate any comments suggestions or criticisms that you may have or develop regarding your evaluation of this equipment Please address your comments to Sun Electronic Systems Inc 1845 Shepard Drive Titusville FL 32780 Tel 321 383 9400 Fax 321 383 9412 Website www sunelectronics com Email info sunelectronics com LIMITED WARRANTY INFORMATION SUN ELECTRONIC SYSTEMS INC WARRANTS THIS PRODUCT TO THE ORIGI NAL PURCHASER TO BE FREE FROM DEFECTS IN MATERIAL AND WORKMANSHIP AND TO OPERATE WITHIN APPLICABLE SPECIFICATIONS FOR A PERIOD OF ONE 1 YEAR FROM THE DATE OF SHIPMENT PROVIDED IT IS USED UNDER NORMAL OPER ATING CONDITIONS THIS WARRANTY DOES NOT APPLY TO SEALED ASSEMBLIES WHICH HAVE BEEN OPENED OR TO ANY ITEM WHICH HAS BEEN REPAIRED OR AL TERED WITHOUT SUN SYSTEMS AUTHORIZATION RISK OF LOSS OR DAMAGE TO THE PRODUCT SHALL PASS TO THE CUSTOMER UPON DELIVERY BY SUN SYSTEMS TO THE CARRIER AT SUN SYSTEMS PREMISES WE WILL REPAIR OR AT OUR OPTION REPLACE AT NO CHARGE ANY OF OUR PRODUCTS WHICH IN SUN SYSTEMS JUDGMENT ARE FOUND TO BE DEFECTIVE UNDER THE TERMS OF THIS WARRANTY EXCEPT FOR SUCH REPAIR OR REPLACE MENT SUN SYSTEMS WILL NOT BE LIABLE FOR ANY LOSS OR DAMAGE TO PERSONS OR PROPERTY CAUSED EITHER DIRECTLY OR INDIRECTLY
60. mand then when a BKPNT is reached during local program execution the breakpoint interrupt is sent to the appropriate remote bus The host controller upon receiving the breakpoint interrupt may issue a BKPNT command to read the value of the breakpoint and issue a BKPNTC to continue local program execution Restrictions Remote only command 40 EC127 ver 0112 Function Set or examine the current set temperature in deg C Syntax nnn nC set current set temperature examine current set temperature Description The command is a TCO controller compatible command which either sets the current set temperature or examines the controller for the current set temperature The set or response is in degrees centigrade always The C command returns with a value of 1999 if the current set tempera ture is egual to none Restrictions Remote interface command only See Also SETI SET Example 150 0C Set current set temperature to 150 0 deg C C Send command to examine current set temp 150 0 Controller response temp 150 deg C SET Examine current set temp with SET command 150 0 Controller response C1 Function Examine the chamber probe temperature Syntax Cl Description The C1 command permits a remote interface to examine the value of the CHAMBER probe The units of measure for the chamber probe are set in the CAL menu Units may be set in F C or K The chamber probe value is normally displayed on the top li
61. mple offset and gain adjust to the chamber and user probe readings without requiring removing the probes from the chamber Unless the type of probe is to be changed it is recommended that these commands be used when calibration of the chamber or user probe is required To use these commands you will need an accurate temperature meter to use as the standard to which you will calibrate the chamber To perform chamber calibration do the following 1 Place the probe of your temperature meter in the chamber close to the chamber or user probe that you will be calibrating 2 Clear any existing cal to standard data by issuing the following command from the front panel CALCn 9 where n 1 for chamber probe or n 2 for the user probe 3 Set the chamber to go to the low temperature point for cal point 1 A temperature such as 10 deg C or whatever temperature you wish 4 Allow 10 minutes for the chamber to stabilize after reaching set point 5 Now enter CALAn 9 lt templ gt where n 1 for chamber probe or n 2 for the user probe and the lt temp1 gt value is the temperature reading in current scale units that your standard meter is reading At this point you have offset the probes calibration Next to also do a gain adjustment on the probe you are calibrating do the following 6 Set the chamber to go to the high temperature cal point 2 A temperature such as 125 deg C or whatever temperature you wish EC127 ver 0112 35 7 Allow 10 minutes
62. nated with a carriage return and or line feed to be transferred to the GPIB interface GPIB lock up time is inhibited for the S command to allow time for a serial device to respond to a prompt message Restrictions GPIB remote interface command only See Also n a Example these commands must originate from the GPIB interface S GPIB interface sends request for reply prior to sending a prompt message to insure that the reply message is sent to the GPIB interface by the controller status the string send status is sent from the controllers serial interface to prompt serial interface device Im OK controller response transfers message received from serial interface to the GPIB interface EC127 ver 0112 65 SCALE1 Function Examine present scale for the chamber or user probes Syntax SCALE 1 examine chamber probe scale SCALE 2 examine user probe scale Description The SCALE command allows a remote interface to examine the present scale of units for the chamber or user probe The scale of units for the two probes are set in the CAL menu Temperature units may or K Restrictions Remote interface command only See Also CAL Menu Example SCALE 1 examine chamber probe scale controller response degrees Centigrade SCALE 2 examine USER probe scale F controller response degrees F 66 EC127 ver 0112 SDEF Function Set or examine the EC127 defaults Syntax SDEF to run SDEF menu from front
63. nce all packing material has been removed check inside the inner chamber also and it is plugged into the power line the Model EC127 is ready for operation Press the white power key located on the front panel After self check is complete the Model EC127 should power up with the LCD display indicating chamber probe temperature and USER probe temperature The blowers located in the rear of unit should be operating The unit is now ready to accept commands INITIAL START UP To get acquainted with the chamber front panel operation we will set a single temperature control segment A segment consists of three parameters The RATE of change of temperature in degrees per minute determines how fast you want the temperature to move Second the WAIT time or amount of time you wish to stay at a new temperature Thirdly the SET temperature you wish to go to To set a single temperature segment 1 First enable the heat and cool outputs press the yellow CH 1 Air Enable up arrow for heat and CH 1 Air Enable down arrow for cool 2 Set the rate of change of temperature to 2 deg min 1 2 blue ENTER 3 Next set the wait time to 1 minute and 10 sec 16 127 ver 0112 WAITI 0 blue ENTER 4 Set the target temperature to 40 degrees SETI 4 0 blue ENTER Enable the heat and cool outputs press the yellow 1 Air Enable up arrow for heat and 1 Air Enable down arrow for cool The LED s are on when enabled The c
64. ne of the front panel LCD display Restrictions Remote interface command only See Also C2 T TEMP Example C1 examine USER channel probe value 25 0 controller response 25 0 units 127 ver 0112 41 2 Function Examine the USER probe temperature Syntax 2 Description The C2 command permits a remote interface to examine the value of the USER probe The units of measure for the USER probe are set in the CAL menu Units may be set in F C or K The USER probe value is normally displayed on the second line of the front panel LCD display Restrictions Remote interface command only See Also 1 TEMP Example C2 examine USER channel probe value 25 0 controller response 25 0 units CAL TO A STANDARD CALCn CALAn CALBn Function To calibrate the chamber probes to match the readings of an in house temperature standard meter Syntax CALCn 9 Clear existing cal to standard data n 1 or 2 CALAn 9 lt templ gt Offset probe to read lt temp1 gt CALBn 9 lt temp2 gt Gain adjust probe to read lt temp2 gt Description These three commands are used to perform fine calibration of the chamber and user probes so that their readings will match the reading of an in house temperature meter First any existing cal data is erased using the CALCn 9 command where n 1 for chamber probe n 2 for user probe Then the meters probe is placed in the chamber in close proximity to the probe you wish to cali
65. ner probes have been enabled In Set Default Menu SDEF scroll down to Enabled and select 2 SRQ OVERFLOW This message is to inform the user that interrupts have not been read by the host computer This mesage can be ignored if you do not wish to provide an interrupt handler in your host software For further information refer to Section 3 GPIB IEEE 488 Parallel Interface EC127 ver 0112 93
66. nn n in following sections 8 Numeric delimiters eor E Exponent for scientific notation Set variable left side egual to value right side Examine variable left side RS 232 422 SERIAL INTERFACE The EC127 provides for RS232 or RS422 remote control The primary difference between RS232 and RS422 is the type of line drivers and receivers used RS232 is the most common of the two serial interfaces used today The serial port s operation depends on whether CMD ERROR INT S are enable or disabled in the SINT menu If command error interrupts are disabled no indication to the host computer communicating to the serial interface is given as to whether a command was accepted or rejected To determine last command status the command may be used If command error interrupts are enabled the controller responds with ERROR message if the command received was rejected If the command was accepted and the type of command does not invoke a reply i e such as a SET nnn n command the controller will reply with an OK message If the accepted command invokes a reply then the reply is sent without the OK message The CMD ERROR INT ENABLED mode is convenient since every command sent to the controller generates a reply back to the host computer thereby providing a handshake The RS port operating parameters are set up in the SDEF menu The SDEF menu allows setting of the BAUD RATE RS232 or RS422 levels ECHO on off and whether to use hard
67. o the chamber As long as the chamber is connected to an appropriate line voltage the controller in the chamber is still power on The OFF command turns off the front panel display indicators and switch functions except for the POWER switch In addition commands received over the remote interfaces are ignored except for the ON command Depressing the POWER switch when the chamber is ON results in the same function as the OFF command Restrictions Remote interface command only See Also ON Example OFF Turn OFF chamber 56 EC127 ver 0112 Function Turn on power to chamber Syntax ON Description The ON command enables power and function of the chamber When the chamber is plugged in to an appropriate line voltage the controller is powered on and can accept a power on command from either the front panel by depressing the power switch or from a remote interface by using the ON command Restrictions Remote interface command only See Also OFF Example ON Turn on chamber power OUT Function Output data to the AUX port USER bus SPI port or A D port Syntax OUT lt device number gt lt address gt lt data gt Description The OUT command permits data to be transferred to an output device such as the digital to analog convertors For a complete description on operating with an I O device consult the particu lar device section Restrictions None See Also IN Example OUT lt device number gt lt address gt
68. oard contains keys for numerical data commands program instructions and menu control Some of the keys perform more than one function The alternate key functions are printed in green or red To access the alternate key function the corre sponding color shift key is used During command entry the second LCD line displays the entries as they are keyed in The entry may be edited using the green shift backup or green shift cancel keys prior to entering the command via the enter key In addition to the 2 line LCD display a buzzer and LED indicators provide positive indication of system function Key functions not required to run the EC127 are defeated automatically by the controller software REMOTE GPIB OR RS232 422 OPERATION The Model EC127 can be operated remotely from a host computer via the built in IEEE 488 standard GPIB interface or either the RS 232 or RS 422 serial interfaces Individual commands may be sent to the Model EC127 or programs may be down loaded and executed further relieving the host computer Section 3 provides detailed information on programming commands EC127 ver 0112 7 EC127 FRONT VIEW 0 Side Port optional Front Panel Control Section optional RS232 RS422 EC127 REAR VIEW Blower Motors EC127 ver 0112 EC127 INNER VIEW AIR DEFLECTOR EC127 INNER CHAMBER AIR BAFFLE REMOVED EC127 ver 0112 10 EC127 CONTROL SECTION SEPARATED LEFT SIDE
69. on of local program defined by m where m selects a local program in the range of 0 to 9 Local programs are entered into the controller using the EDIT command from the local keyboard or down loaded from a remote host computer using the STORE command Local program execution may be prematurely terminated by issuing a STOP command Restrictions None See Also RUN TIME EDIT STOP STORE END Example This example downloads a simple program from remote processor and then executes the program Scale in C DELP 0 delete current program 0 STORE 0 prepare controller for entering local prog FOR 2 0 10 set FOR loop for 10 loops 1 10 define temp segment 1 RATE1 10 C m WAIT 1 15 wait 15 minutes SET1 55 0 set final temp to 55 0 C SET1 125 0 define temp segment 2 rate 10 C m wait 15 minutes final temp 125 0 C NEXT 12 mark end of FOR loop 12 END mark end of local prog and end of STORE RUN 0 run local prog 0 EC127 ver 0112 63 RUN TIME OF DAY Function Starts the execution of a local program at a specific time of day Syntax RUNmTIME hh mm ss or RUN mTIME hh mm ss Description The RUN TIME command initiates the execution of local program defined by m where m selects a local program in the range of 0 to 9 at a specific time of day Local programs are entered into the controller using the EDIT command from the local keyboard or down loaded from a remote host computer using the STORE comman
70. onds E5 overtemp error may be caused by a dirty condenser or obstructed cooling airflow To clean the condenser coil perform the following steps 1 Unplug the chamber from the power line 2 Remove left side outer chamber panel to gain access to coil that is located in bottom compartment left side Using a low pressure shop air hose blow dust off condenser coil and out of the chamber compartment 4 Replace side panel EC127 ver 0112 83 84 127 0112 SECTION9 REPAIR TEMPERATURE CONTROLLER SECTION REMOVAL AND REPLACEMENT The temperature controller section is located on the bottom of the chamber front The con troller electronics is located in a pull out drawer for easy access Follow the procedure outlined below for the removal and replacement of the controller section STEP 1 Remove all electrical power from the chamber unplug the chamber from the line voltage Insure that all of the components of the chamber have reached ambient temperature STEP 2 Remove chamber right side panel STEP 3 Remove screws located on controller front bottom edge and screws on left edge that go through chamber left side panel STEP 4 Carefully slide controller drawer out far enough to gain access to the connectors STEP 5 First unplug the three green probe connectors and the in line molex 5 pin plug STEP 6 Disconnect the 26 pin flat cable from the I O board that is mounted on the chamber f
71. panel SDEF aaaaaaan a Y N 1 or 0 0 to 3 SDEF Description When you wish to setup all EC127 default parameters then you must enter SDEF from the front panel to enter the set defaults menu The menu operation is covered in Section 3 of this manual under SDEF MENU When controlling the EC127 via a remote host computer the SDEF and SDEF commands can be used to read and change selected EC127 default parameters When the SDEF command is received the EC127 sends an 8 character string to the active remote port To modify the available default parameters the remote host sends SDEF aaaaaaan where character position 1 Y N Y dual loop control mode 2 Y N Y RS char echo on 3 Y N on D A 4 Y N Y chart C2 on D A 5 Y N Y optional printer on 6 Y N 1 to D A 7 Y N Y PID 2 to D A D 8 0 to 3 buzzer volume 0 off Note For front panel entry into local programs a 1 may be used in leu of a and 0 rather than Restrictions Remote command or local front panel menu The SDEF command may be stored in LP to modify on the fly EC127 ver 0112 67 SETI Function Set or examine temperature segment final temperature Syntax SETI lt nnn n Set segment final temperature SETI Examine segment final temperature Description The SETI command allows for setting or examining the final temperature within a tempera ture segment The temperature segment consists of the change of temperature d
72. port or A D port Syntax IN lt device number gt lt address gt Im Description The IN command allows data read capability from the analog port Data values read are stored in a variable For proper operation of the device interface consult the appropriate section describing the device in full Restrictions None See Also OUT I variables Example IN3 2 12 Read A D channel 2 into I var 2 EC127 ver 0112 53 LIST Function List a local program from a remote interface Syntax LISTm or LIST m Description The LIST command permits a remote interface to upload a local program from the control ler This command allows a remote operator to verify the results of a STORE instruction which downloads programs to the controller In addition some communication programs allow for captur ing data to text files In this manner local programs can be maintained on a personal computer and down loaded or uploaded if required Restrictions Remote interface command only See Also STORE Example DELP 0 clear local program 0 STORE 0 ready controller for local program down load KEF send local program END end down load LIST 0 request upload of LP 0 EEN local program displayed LLO Function RS 232 422 Command to lockout local keyboard Syntax LLO Description The Local Lockout LLO command may be issued from a host processor to lockout the local keyboard The LLO command only applies to host computers communicating over the R
73. probes The SDEF mode permits modification of default parameters such as GPIB address D A output configurations alarm function and buzzer loudness etc The SINT mode permits modification of interrupt configuration parameters such as GPIB SRQ func tions CHAMBER AND USER PROBES The EC127 has two measurement probes located in the chamber The chamber probe is hidden from view behind the top air baffle It measures the air temperature just before the air exits the plenum and flows into the work space The chamber probe is normally the control probe unless a special control mode is selected The USER probe is accessible within the test chamber area The user probe is provided for whatever need you may have Some common uses are to measure or control the actual temperature of a sample under test or to measure or control air temperature near 6 EC127 ver 0112 the sample The USER probe is electrically isolated from other chamber electronics permitting the probe to be directly attached to devices containing voltages up to 240 volts relative to chamber earth ground In the CAL menu the type of probe used can be changed but the default user probe type is a K thermocouple The chamber and user probes values are displayed on the chamber control panel and may be read remotely by a host computer FRONT PANEL OPERATION The Model EC127 can operate in a stand alone configuration through the use of its control panel located on the front of the unit The keyb
74. r 0 20mA Range Idesired ie Iz OmA x 0 X x 255 20 255 20 For 5V 5V Range V desired ie V 5 0 X x 255 5 x 255 10 58 EC127 ver 0112 PID1 Function Set or examine PID coefficients for air cool control Syntax PID 1 nnn n nnn n nnn n set cool PID coefficients PID1 examine cool PID coefficients Description The PID1 command permits modification and examination of the proportional integral and derivative PID coefficients used in the algorithm which controls the chamber cooling process PID coefficients may be changed to accommodate varying changes in mass or radiant power in the test chamber area PID coefficients are stored in battery backed memory The default PID coefficients will most likely not need to be changed Restrictions None See Also PID1 Example PID1 0 25 0 001 0 1 set PID coefficients PID1 examine PID coefficients 0 25 controller response P 0 001 controller response I 0 1 controller response D PID1 Function Set or examine PID coefficients for heat control Syntax PID1 nnn n nnn n nnn n set heat PID coefficients PID1 examine heat PID coefficients Description The PID1 command permits modification and examination of the proportional integral and derivative PID coefficients used in the algorithm which controls the chamber heating process PID coefficients may be changed to accommodate varying changes in mas
75. r the RATE and WAIT information before entering the SET point The CSET command allows you to examine the current temperature which control ler is attempting to control to during ramps from one temperature to another This value changes at the rate defined by the RATE command until the SET value is reached At that point CSET is egual to the SET value The chamber and user temperature may be read remotely at any time and are displayed on the LCD display SET 1 nnn n Set segment final temperature SETI Examine present segment final temperature WAIT 1 nn nn nn Set temperature soak period at final temperature HRS MIN SEC WAIT 1 nn set wait time MIN WAIT1 F OREVER Wait Period never times out WAIT1 Examine present wait period RATEIznnn nn Set temperature ramping rate at nnn nn degrees per minute 1 Examine present temperature ramping rate CSETI Examine present temperature of which controller is attempting to control C2 Examine USER probe value Examine CHAMBER probe value SCALE 1 Examine Units of Scale for the Chamber Probe NE or K SCALE 2 Examine Units of Scale for the USER Probe C F or K 28 EC127 ver 0112 TIME hh mm ss Set Time of Day TIME Examine present Time of Day STOP Prematurely terminate the run mode or make set none if run mode not active TEMPERATURE SAFETY LIMIT COMMANDS Temperature limit commands are used for safety reasons and to insure test parameters are not exceeded Lower and
76. rrows for scrolling LP BKPNTI controller response DELL delete breakpoint command GOSUB 5 controller response next line of program DELP Function Delete or clear local program Syntax DELPm or DELP m Description The delete program command allows for deleting which in this case is the same as clearing a single local program defined by the variable where m is in the range of 0 to 9 Programs may be deleted either from the local front panel or from a remote interface Before using the STORE command from a remote interface the local program selected 0 thru 9 must be deleted if any commands are present in that particular local program Restrictions None See Also DELL STORE Example from a remote interface DELP 0 clear local program 0 STORE 0 prepare controller for accepting commands ERS send local program commands END terminate local program down load 46 EC127 ver 0112 DEVLI1 Function Set or examine the deviation limit Syntax DEVL1 nnn n Set deviation limit DEVLI Examine deviation limit Description The DEVLI command sets the deviation limits for the chamber probe If the deviation limit interrupt is enabled in the SINT menu and the chamber probe temperature varies by more than the set limit an interrupt will be generated to the active remote interface Restrictions Deviation Limit range is between 0 1 and 300 See Also UPL1 LOLI UTL LTL SINT Menu Example if SCALE 1 C DEVL1 2 5 set de
77. rupt enabled Y buzz single timeout Y buzz Local Program LP done Y buzz Local Program LP timeout Y command error interrupt enabled 10 Y lt BKPNT interrupt enabled 11 0 no parallel pole or bit 1 to 8 a v Pa N E MN se Note When ENTERing from the front panela 1 may be used and 0 for Description The SINT command allows for setting or examining the set interrupt parameters over the GPIB RS232 or RS422 Restrictions Remote command only See Also See Set Interrupt Menu in Section 3 of this manual Example SINT NYYYYNNNY YO where position 1 N all remote interrupts ARE NOT off 2 Y single timeout interrupt enabled 3 Y deviation interrupt enabled 4 Y Local Program LP timeout interrupt enabled O Y Local Program LP done interrupt enabled 6 N buzz single timeout disabled 7 N buzz Local Program LP done disabled 8 N buzz Local Program LP timeout disabled 9 error interrupt enabled 10 Y lt BKPNT interrupt enabled 11 Oznoparallel pole EC127 ver 0112 1 to 8 to define parallel pole bit 69 STATUS Function To poll the EC127 status Syntax STATUS Description The status inguiry command is a remote bus command that allows the host control computer to poll the EC127 to determine its current operating status When the STATUS command is ceived the EC127 sends back a 26 character string of Y s N s where character position 1
78. s for setting or examining the rate at which the controller will control the change from one setpoint to another setpoint within the chamber Rate is based on the chamber probe and on the current units temperature SCALE1 When setting or examining the rate nnn n represents units per minute Units may be F C or K Restrictions Chamber dynamics limit the maximum ramping rate See Also SETI WAITI RATE SET WAIT Example If SCALE for the chamber probe is in C RATE1 10 0 set ramping rate for 10 0 C minute RATE1 examine present ramping rate 10 0 controller response 10 0 C min read present chamber probe temperature 25 0 controller response for example 25 0 SET1 35 0 set new setpoint for example 35 C after waiting 30 seconds read present chamber temperature 30 0 controller response up 5 in one half min 60 EC127 ver 0112 Function Set the current rate of change for ramping Syntax RATE nnn n u Set the current ramping rate RATE Examine the current ramping rate Description The RATE command is an EC1x compatible command which allows for setting or examining the rate at which the controller will control the change from one setpoint to another setpoint within the chamber Rate is based on the chamber probe and on the units of SCALE set up for the chamber probe in the CAL menu or optional u units When setting or examining the rate nnn n represents units per minute Restr
79. s or radiant power in the test chamber area PID coefficients are stored in battery backed memory The default PID coefficients will most likely not need to be changed Restrictions None See Also PID1 Example PID1 0 25 0 001 0 1 set PID coefficients PID1 examine PID coefficients 0 25 controller response P 0 001 controller response I 0 1 controller response D EC127 ver 0112 59 Function To place chamber in an advanced temperature control mode Syntax PIDA n where n 0 for normal control to chamber probe where 1 for control to average of cham and user where n 3 for control to user probe Description The PIDA command is used to select one of the advanced PID control modes When PIDA 0 is set the controller uses the readings from the chamber probe for control Mode 0 is the default mode Mode 1 uses the average of the chamber and the user probe temperatures as the control Mode 3 uses the user probe reading for control Care must be used when using mode 1 or 3 since if the user probe is attached to a large thermal mass it may lag the chamber probe air temperature If the user probe temperature lags the air temperature by a large amount the air temperature may hit the UPL1 or and thus force off heat or cool RATE1 Function Set the current rate of change for ramping Syntax RATE1 nnn n Set the current ramping rate 1 Examine current ramping rate Description The RATEI command allow
80. t The factory preset for the mechanical fail safe thermostat is 200C You can adjust the fail safe from slightly above room temperature to the 205 deg C chamber limit To adjust the fail safe setting to another temperature perform the following procedure If you are unfamiliar with the operation of the chamber or if the 200 deg centigrade upper limit is OK for now then come back to this section later to set the fail safe temperature Be sure to set the fail safe before placing the cham ber into normal service since shipping vibration may have changed the factory setting STEP 1 Locate the fail safe adjusting hole on the rear of the EC127 and displace any insulation material which may block access to the fail safe adjusting screw STEP 2 Set the chamber temperature to the desired fail safe temperature and let the chamber soak for a period of 20 minutes If the fail safe trips during heat up then turn the bimetal sensor adjusting screw counter clockwise turn then lift the breaker lever to reset it STEP 3 After the chamber has been at temperature for 20 minutes slowly turn the adjustment screw clockwise to lower the fail safe trip point until the circuit breaker on the rear of the unit trips Then adjust the fail safe back 1 4 of a turn counter clockwise and reset the circuit breaker to restore normal operation LOCAL PROGRAMMING EXAMPLE The following program demonstrates some of the most used local programming features The program w
81. t block the internal chamber air circulation Air is pulled in over the evaporator coil located on the rear wall of the inner chamber Be careful when placing your test specimen so as not to block airflow Reduced airflow may cause heater element failure EC127 ver 0112 15 CAUTION Keep unit in an upright position at all times The refrigeration compressor contains oil which requires a level orientation of the unit CAUTION When operating the chamber at low temperatures for extended periods of time operate the chamber at 100 C for an hour to dry any moisture which may accumulate in the fiberglass insulation material surrounding the test area of the chamber EC127 CHAMBER INSTALLATION The EC127 is factory wired for AC sources delivering 110 208 or 240 VAC 50 60 Hz A tag located on the back panel of the chamber indicates the proper voltage to be applied Insure that the current rating of the service is sufficient to provide the necessary amounts of power required by the chamber For the 110 vac version you will need a full 15 AMP service therefore you must make sure that the chamber is the only load on a 15 AMP branch For the 208 and 240 versions 10 AMPS is required Install the chamber on a surface which is flat rigid and free from dust shock and vibra tion Orient the chamber in such a manner that at least 18 inches of free air space exists around the rear and sides of the chamber to provide cooling for the compressor system O
82. the front panel keyboard depressing the HEAT switch on the front panel ENTERs either HON or HOFF If the opposite action is desired cancel the entry and re ENTER to get the correct action All local programs default to HON at the beginning Restrictions None See Also COFF CON HOFF C1ON Example HON Enable chamber heating operation 52 EC127 ver 0112 I VARIABLES Function Set or examine I variables Syntax Im lt value gt set Im equal to value Im Im lt value gt set Im equal to sum of values Im Im lt value gt set Im to difference of values Im examine I variable m Description I variables are used in local programs for loop control and general purpose Integer arith metic A value may be any integer in the range of 32768 32767 or another I variable The con troller supports 10 I variables where m ranges from 0 to 9 I variables are global between all local programs and as such care should be taken to insure that the same I variable is not used in two different applications within any active group of local programs Restrictions None See Also FOR NEXT IN OUT BKPNT Example 10 52 set I variable 0 to 52 12 10 set variable 2 egual to I variable 0 5 10 9 set I var 5 I var 0 9 43 16 10 15 set I var 6 I var 0 I var 5 95 16 examine I variable 6 95 controller response IN Function Input data from the AUX port USER bus SPI
83. time remaining in the wait period After the end of a wait time out the WAIT is reset to forever For best operation the temperature segment should be ENTERed RATE WAIT then SET Restrictions Range from 99 59 59 to 00 00 01 See Also Example 78 SET RATE M WAITI SETI RATE RATE 10 WAIT 00 10 30 TEMP 25 0 SET 35 0 WAIT 00 09 30 define temperature segment rate 10 C min wait 10 min 30 sec examine current chamber temperature controller response 25 0 C set new temperature 35 C after minute set temperature is reached wait period begins after more minute examine wait setting controller response 9 min 30 sec remaining EC127 ver 0112 SECTION6 127 OPTIONS POWER OPTIONS The EC127 can be manufactured to operate from a 115 Volt AC 60 HZ or 220 Volt AC 50 HZ power line The chamber requires a full 15 AMP service The EC127 should be the only device running on a 15 AMP branch and if an extension cord is used it must be a 14 Gauge or larger 3 conductor cord COOLING OPTIONS The EC127 is cooled by a built in environmentally safe closed loop refrigeration system The refrigeration system is powered by a one third horse power hermetically sealed compressor The sys tem uses safe R404a refrigerant For special situations where the cooling speed needs to be increased LCO2 or LN2 boost injection cooling options can be ordered with the chamber See COOL BOOST LCO2 and LN2 heading in
84. ting considering the top level program as nest 1 I variables are global to all local programs Restrictions None See Also FOR NEXT Example if program already loaded and operating remotely LIST 2 display local program 2 FOR 0 10 set FOR NEXT for 10 cycles GOSUB 0 execute program in LP 0 GOSUB 1 execute program in LP 1 NEXTI3 end FOR NEXT loop for I variable 3 END end of LP 2 127 ver 0112 sl Function Disable chamber heating Syntax HOFE Description The HOFF command is an EC1x compatible command which permits a remote interface to disable chamber heating by the controller The front panel HEAT switch also disables controller heat function when depressed if heat was enabled When editing local programs from the front panel keyboard depressing the HEAT switch on the front panel ENTERs either HON or HOFF If the opposite action is desired cancel the entry and re ENTER to get the correct action All local pro grams default to HON at the beginning Restrictions None See Also CON COFF HON CION C1OFF Example HOFF disable chamber heating HON Function Enable chamber heating Syntax HON Description The HON command is an EC1x compatible command which permits a remote interface to enable chamber heating operation The HEAT switch located on the front panel can also enable chamber heating operation if depressed when heating is disabled When editing local programs from
85. ver 0112 90 SECTION 10 REPLACEMENT PARTS BI METAL FAILSAFE FAILSAFE BREAKER TYPE K CHAM PROBE TYPE K USER PROBE 400 WATT 110 VAC HEATER ELEMENT DOOR HANDLE ASSEMBLY RIGHT DOOR HANDLE ASSEMBLY LEFT EC127 ver 0112 800008 650010 980200 980502 980501 91 92 127 0112 SECTION 11 ERROR MESSAGES REFRIGERATION SYSTEM ERROR MESSAGES The EC127 controller will display an En n 1 to 6 error message on the front panel display if it detects an abnormal condition in the refrigeration system The error message is displayed for 10 seconds then goes away The controller will not start or will turn off the refrigeration system when an error is found If the chamber is not cooling properly watch the display for an error indication then call factory for assistance The following error messages may E1 A valve not opening E2 A valve not opening E3 A valve not closing E4 A valve not closing 5 Compressor motor overtemp Clean to allow airflow E6 Low refrigerant charge System has leak or sensor bad PROBE ERROR MESSAGES The EC127 controller will display the following error messages if probe faults are detected Watch the display for an error indication then call factory for assistance Probe 1 Error Fault with chamber probe detected Probe 2 Error Fault with user probe detected Probe 3 4 Error Fault with Scanner Probes detected Probe 5 10 Error Incorrect number of scan
86. viation limit to 2 5 C DEVL1 examine deviation limit 2 5 controller response 2 5 C RATE1 30 define temp segment WAIT 1 03 00 00 wait for 3 hours SET1 55 0 set final temp to 55 0 C EC127 ver 0112 47 EDIT Function Edit local program from the local keyboard Syntax EDITm or EDIT m Description The EDIT command allows for local program loading and editing from the local keyboard A local program specified by m in the range of 0 to 9 may be edited by using the up and down arrows delete line DELL command or by entering new commands which are placed in front of the command presently displayed on the front panel LCD display Local program editing is terminated by entering the END command Restrictions Local keyboard command only See Also STORE LIST END Example This example illustrates entering and editing a local program from the front panel keyboard The local program consists of a call to LP 2 a breakpoint which displays the number 1 and a call to LP 5 EDIT 0 edit local prog 0 END controller response on LCD display GOSUBH2 enter prog call to local prog 2 END controller response GOSUB 5 enter prog call to local prog 5 END controller response UP ARROW scroll up GOSUB 5 controller response BKPNTI insert breakpoint between calls to LP 2 and LP 5 GOSUB 5 controller response END enter end local program editing command 48 EC127 ver 0112 Function Terminate local program edit
87. ware handshake The serial port sends a zero for the parity bit and does not check incoming parity When DTR CTS is not selected only the TRAN DATA DATA and GROUND signal lines are signifi cant to the controller To communicate over the RS232 bus a cable constructed with a male DB25 connector on 127 controller end and a female DB9 connector PC end and wired as follows 15 reguired 24 127 ver 0112 RS232 CABLE WIRING DIAGRAM FOR EC127 EC127 DB25 Male COMPUTER DB9 Female Pin Pin 2 TxD RxD 2 3 RxD TxD 3 7 GND GND 5 To communicate through Windows HyperTerminal use the following settings Connect using desired COM Port Bits per second 9600 default setting in EC127 SDEF Menu Data bits 8 Parity NONE Stop bits 1 Flow control NONE If your computer is using a DB25 Male connector instead of the DB9 the wiring connections are as follows For example purposes this diagram also assumes DTR CTS control is selected EC127 CONTROLLER DB25 Male COMPUTER DB25 Female 2 TxD RxD 3 3 RxD __ 5 CTS 20 8 DSR 6 20 15 7 NOTE CTS If enabled in SDEF Menu but not hardwired unit will not communicate The EC127 chamber provides RS422 serial interface signals on the 25 pin connector in addition to the RS232 signals The 25 pin connector signals are EC127 ver 0112 1 7 13 15

Download Pdf Manuals

image

Related Search

Related Contents

PDF Urbia nº 8 complet  Instruction for use_Suprastone  PDFファイル  Mode d`emploi Accessoires TV  User Manual-i3030  INFORMAÇÕES GERAIS  Plano Nacional de Prevenção Rodoviária  ユピテル のドライブレコーダー 車両・ ドライバー もきっちり管理 ！  SEAT Portable System  Trimod® - Legrand  

Copyright © All rights reserved.
Failed to retrieve file