PTCC-01-ADV USER MANUAL
Contents
1. PTCC 01 ADV Programmable Smart TEC Controller Advanced USER MANUAL Features compact size low cost easy to use high stability and precision low power consumption modern architecture with digitally performed temperature control compatible with 2 TE 3 TE and 4 TE Peltier element overheat and overcurrent protection output voltage 3 14 5 V 200 mA current voltage temperature monitor available over LCD and PC compatible with standard and SMIPDC F IR detection modules split grounds and filtering for EMC improvement firmware upgrade option is available supply voltage range 9 16 V wider range available on demand Page 1 of 22 PTCC 01 ADV theory of operation Please note In the currently used nomenclature the names or symbols of intelligent controllers and IR detection modules are different in comparison to the names used previously when the software was released In the following text PIPDC new name is exchangeable with SMIPDC old name as well as PTCC Programmable Thermoelectric Cooler Controller new name is exchangeable with the SmartTEC Advanced old name When the power supply is applied and IR detection KIT is turned on PTCC probes the type of the connected IR detection module When PIPDC or module containing internal 1 wire memory is found the settings are downloaded and following the user settings the hardware is set If the PTCC cannot find any of the said above module types2. User can store the PIPDC settings in one of four memory banks and immediately load when necessary When Save user settings is chosen current configuration is saved Choosing Load user settings results in replacing current PIPDC settings with the settings from the bank When IR detection kit is restarted last PIPDC configuration is restored Page 15 of 22 SmartTEC monitor This menu option is used for checking of PTCC and IR module working conditions 1 Measured detector temperature PC software TDet 2 Voltage over Peltier element PC software UTec 3 Current flowing through the Peltier element PC software ITec Page 16 of 22 4 Current consumption from the supply positive line PC software ISupPlus 5 Current consumption from the supply negative line PC software ISupMinus 6 Current consumption from the auxiliary supply line cooling fan PC software lfanPlus 7 Supply voltage positive line PC software USupPlus Page 17 of 22 8 Supply voltage negative line PC software USupMinus N C module not connected No mem module with no configuration memory 1 wire module with internal configuration memory SMIPDC programmable intelligent IR module 10 SmartTEC status 000 temperature control loop locked 001 cooling 002 no cooling TEC controller inactive 128 detector overheat 129 over current TEC supply 130 TEC lines opene
3. Edit gt f Monitor USupPlus ISupPlus E 0 fa a Store Use Det ult USupMinus TSupMinus IFanPlus Status AUTO auxiliary voltage is enabled default ON auxiliary voltage is enabled OFF auxiliary voltage is inactive Page 8 of 22 4 Detector temperature In general the parameter is responsible for the detector temperature stabilized by the PTCC controller The lower temperature limit is due to the parameters of the Peltier element It doesn t make sense to set 100 K if Peltier element may achieve only 200 K Establishing too low temperature is not risky however the PTCC would in this case try to cool down the detector for 2 minutes and afterwards will indicate an error and stop working which may be confusing The upper limit is due to the detector safety reasons for example in very rare cases if detector is biased the bias current may rise above the safety margin in the room temperature and cause the detector overheat which the limit will prevent The controller is unable to warm up the detector therefore there is no risk of heating up instead of cooling PC software Controller Detection Module Name SmartTEC BASIC Detector Type Serial 900000 14 ial Detector Serial Settings USupPlus 12 000 V c Eat USupMinus 12 000 V 4 E Edit Monitor USupPlus ISupPlus USupMinus ISupMinus IFanPlus Status Page
4. 12 000 V o oe Ej Edit Det USupMinus 12 000 V I gt Edit Fanctr auro _orF on TDet K 0 Edit TTecMax 0 5000 A i Edit Use Defaults Monitor USupPlus TSupPlus USupMinus TSupMinus Monitor UDet TFanPlus Uist Status 13 Configurator Service View Service Mode Wout Page 4 of 22 To change or check the user setting the following menu option should be chosen se ets x FARES Page 5 of 22 Parameters available for the adjustment 1 Module Power Supply Control The parameter controls the moment of turning the IR module supply on to prevent powering the detector when not properly cooled down PC software Controller Detection Module Name SmartTEC BASIC Detector Type Serial O00000 14 Detector Serial 000000 00 Settings SupCtr AUTO OFF ON E USupPlus 12 000 V i eit USupMinus 12 000 V p Edit FanCtri AUTO OFF on TDet 230 000 K 0 Edit TTecMax 0 5000 A i edit Use Defaults Monitor USupPlus ISupPlus USupMinus TSupMinus IFanPlus Status 2m a6 2 AUTO the power supply for the module is turned on when the valid detector temperature is reached default ON the power supply is always active OFF the power supply is always inactive Page 6 of 22 2 Module power supply voltage The following parameters establish
5. and it is compatible with IR detection module with no memory the PTCC internal settings are applied instead If PTCC is not compatible with no memory modules it indicates an error and finishes the operation If no error occurs the detector is then being cooled down It usually takes around 30 seconds until the valid detector temperature is reached the power supply for the IR module is being turned on afterwards and the module is ready to operate The controller instantly probes the in circuit currents and voltages If any abnormal behavior is recognized meaning short or open circuit on the supply TEC or thermistor lines or the PTCC is unable to reach the set temperature of the detector within 2 minutes the supply is being turned off and the error is indicated User can check the conditions of operation of the module and the controller using the user interface the simplified keyboard and the LCD or the PC and the software which is available on the VIGO website http www vigo com pl pub File download SmartManager setup exe Page 2 of 22 SmartTEC menu structure Quick view of the most important parameters Ts set temperature Tr read temperature PWR on off e SmartilECc_ User settings of the PIPDC module Page 3 of 22 Setting the PTCC parameters The current chapter contains the information regarding the PTCC settings Please note that having the connected IR detection module equipped with the memory 1
6. the power supply value for the positive and negative supply line Hardware limits are 3 15 V set independently and as mentioned above may be limited due to IR module safety PC software Controller Detection Module Name SmartTEC BASIC Name TEST MODULE Detector Type Serial 000000 14 Serial 000000 00 Detector Serial 000000 00 I Settings Settings Supctri Auro OFF On Dett Edit iz Det l Edit f ca ITecMax 0 5000 A iml H Edit Coupling AC DC Bandwidth LOW MID HIGH Use Defaults LOW HIGH Monitor USupPlus OFF UTec 0 000 V User Settings ISupPlus o si 0 0000 n fa Load Store Use Defaults USupMinus OFF d TDet 17483 750 K TSupMinus OFF IFanPlus OFF mA Status 132 Configurator Service View Service Mode V Auto PTCC display Page 7 of 22 3 Cooling fan supply control Manipulating this parameter user can enable or disable the auxiliary 5 V supply used to power the cooling fan When PIPDC module is connected the parameter is inactive because auxiliary voltage besides supplying the fan is also used for supplying the microcontroller and therefore needed for normal operation PC software Controller Detection Module Name SmartTEC BASIC Detector Type Serial 900000 14 Detector Serial 000000 00 Settings usupPus 12 000 V E ji edit USupMinus 12 000 V o
7. 9 of 22 5 Thermo Electric Cooler maximum current Defining the exact Peltier element parameters is not always needed for the temperature control However depending on the Peltier element type there s always necessary to setup its maximum current In this particular case no modification of the parameter is possible however sometimes user may decrease the current below maximum avaliable for the TEC PC software Controller Name SmartTEC BASIC Serial 000000 14 Settings Supctri Auro OF ON USupPlus 12 000 V E i edit USupMinus 12 000 V Edit FancCtri auto OFF ON rows 230000 k H eae Use Defaults Monitor USupPlus OFF v UTec 0 000 V mA ITec 0 0000 A v TDet 17483 750 K ISupMinus OFF mA IFanPlus OFF mA Tht 23 4 c Status 132 Configurator Service View Service Mode PTCC display TSupPlus oF USupMinus OFF V Auto Detection Module Detector Type Detector Serial 000000 00 Name TEST MODULE Serial goo000 00 Settings DetU Edit eat a Em Ea a a MID Deti Gain Offset Varactor Coupling Bandwidth HIGH LOW Trans LOW HIGH User Settings fa Load Store Use Defaults V Auto Page 10 of 22 Setting the PIPDC parameters The current chapter contains the information regarding the PIPDC settings As for the PTCC parameters some of the parameter rang
8. d 131 TEC lines shorted 132 thermistor lines opened 133 thermistor lines shorted 134 SmartTEC overheated circuit 135 no module connected 136 data pin shorted to the ground 137 PIPDC data error 138 1 wire data error 139 PTCC configuration memory error or not programmed Page 18 of 22 11 PWM output Peltier element is driven by PWM based output stage Minimum PWM value is 0 meaning the TEC is not cooling maximum is 65535 Peltier is driven with maximum power Page 19 of 22 PIPDC monitor Some of the options included in this sub menu are redundant to the options in PTCC monitor Those repeated measurements help in finding weak connection for example supply voltages measured by PIPDC and PTCC may be compared to find weak connection The tolerable and measurable input voltage ranges are matched individually for each monitor input to achieve proper dynamic range 1 Supply voltage positive line mpg 7 Page 20 of 22 4 Voltage at TEC line 5 Voltage at TEC line The TEC is powered with negative voltage This means the voltage at positive line is close to 0 V 0 0 5 V and voltage at negative line is higher in terms of absolute value and in normal operation potential is lower than GND 1 9 V 6 Voltage on thermistor line 1 During the normal operation the voltage here depends on the temperature and should be between 0 5 V and 2 V 7 Voltage o
9. es may be limited due to the detector and IR detection module safety reasons 1 Detector bias voltage hardware min O OV hardware max 256 1V The value set here directly drives internal digital potentiometer The dependence between the value and the bias voltage is linear The real bias voltage may be checked in SMIPDC Monitor menu 2 Detector bias current compensation hardware min 0 0 hardware max 256 10 mA The value set here directly drives internal digital potentiometer The dependence between the value and the compensation current is linear The bias current compensation is used to avoid first preamplifier stage saturation After changing the bias current compensation it is necessary to check the voltage behind the first stage SMIPDC Monitor It should be as close to zero volts as possible Page 11 of 22 3 Preamplifier second stage gain hardware min 0 0 5 V V hardware max 256 200 50 V V larger value doesn t change gain The preamplifier consists of two stages first stage is made as a transimpedance amplifier second stage is made as a voltage amplifier The gain setting is responsible for the gain of the second stage Please note than the full output voltage range is available when the gain is set between 5 V V to 50 V V Below 5 V V the output voltage range 1 V over 50 Ohm load is reduced The dependence between the potentiometer setting and the gain is li
10. n thermistor line 2 This line is normally at ground potential However if the connection to the PTCC is weak the line is pulled up by the thermistor and line 1 and the value is higher Page 21 of 22 This is the real measured voltage over the detector This measurement is particularly useful for checking the results of coarse adjustment the detector bias voltage with the digital potentiometer 9 Voltage behind the preamplifier first stage i This measurement allows the user to check what is the DC IR radiation level even when AC coupling to the second stage is chosen This may be potentially useful in heterodyne detection By measuring the voltage at output of the 1t preamp stage user can check whether is the risk of preamp saturation and what is the source of output DC offset The output voltage measurement is useful especially if it is not possible to validate the setup connection with the oscilloscope It is also easy to perform an offset cancellation with no additional equipment Page 22 of 22
11. near in decibels 4 Output voltage offset correction SmartTEC yi hardware min hardware max Output voltage OV should appear at the output for the potentiometer setting close to the half of the range 128 When it is unable to achieve 0 V first stage offset is too high and Detector bias current compensation must be adjusted to reduce it Each time the setting is updated it is possible to verify the result by checking the output voltage in SMIPDC monitor menu Page 12 of 22 5 Varactor voltage first stage frequency compensation SmartTEC i oe gt aa es A E i arh ef kote k X wer mr z p naed y ii Ee j H hee hardware min 0 maximum parallel capacitance lowest top frequency hardware max 4095 minumum parallel capacitance highest top frequency The parameter changes the frequency compensation for the preamplifier first stage The lower value means the capacitance parallel to the feedback resistor is relatively high and therefore the circuit might be over compensated Higher value of the parameter gives weaker frequency compensation Lower values leads to oscillation higher the circuit is stable however the ringing behind the signal edges may be visible 6 Preamplifier first stage transimpedance LOW 1 kOhm HIGH 5 kOhm Higher transimpedance results in lower bandwidth usually around 80 MHz depending on detector type and the f
12. requency compensation should be weaker Preamp is normally more stable and less noisy 5 pA sqrt Hz Lower transimpedance results in higher bandwidth usually 220 MHz depending on the detector parameters frequency compensation should be stronger to avoid ringing The input referred noise current density is higher 8 pA sqrt Hz Overall IR module transimpedance is calculated as a first stage transimpedance times second stage gain Therefore for 1kKOhm the transimpedance is 500 Ohm 50 kOhm and for 5 kOhm 2 5 kOhm 250 kOhm The bandwidth doesn t depend on preamplifier second stage gain Page 13 of 22 7 Coupling between first and second stage AC DC AC coupling results in better output voltage stability and in general full gain range is then available and output voltage offset correction is simpler The lower cut off frequency is around 1 KHz DC coupling allows the user to monitor the DC level IR radiation The IR detection module is less stable in terms of output DC offset and due to the instability limited range of gain is convenient for usage 8 Preamplifier bandwidth LOW 1 5 MHz MEDIUM 15 MHz FULL depends on detector parameters and first stage transimpedance It is possible to reduce the bandwidth down to 1 5 MHz or 15 MHz compared to the full bandwidth this reduces the output noise and simplifies measurement when IR radiation level is weak Page 14 of 22 9 Saving and loading user settings
13. wire or PIPDC manipulation of the parameters affects the IR module internal memory the PTCC memory is inactive Each time the IR detection kit is restarted the newly set parameters are used If PTCC is compatible with the module having no memory on board and the connected module doesn t respond to the sent 1 WIRE and PIPDC commands then the internal STCC EEPROM memory is used for configuration Please be careful IR detection modules having no internal configuration memory cannot be exchanged No matter what type of IR module is connected it is always treated the same way following the configuration stored in internal memory Valid for one module may be invalid for another Usually user settings are available for the adjustment within factory limits narrower than the hardware limits For example if the IR module power supply is 9 V then allowing the user to manipulate the supply voltage with no limits is considered as a potential source of the module damage The limits are applied in the factory and user is unable to adjust the values in full range In the PC software there is a green part of the slider showing the parameter range available for the user or the buttons are clickable unavailable are grayed instead Controller Detection Module Name SmartTEC BASIC Name TEST MODULE Detector Type Serial OO0000 14 Serial gooo00 00 Detector Serial opp000 00 Settings Supctri AUTO Deti USupPlus
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