Data Sheet
Contents
1. 3462 Dual Standard Input Option Card Adds two standard inputs to the Model 340 appearing on the display as C and D The card has separate A Ds and excitation for This shows a variation of the display with a large loop 1 heater each sensor A microprocessor on the card manages the A D and output graphic bar where the PID parameters are not displayed communication with the Model 340 Allows the Model 340 to read but the heater output is more prominent four sensors and use any of them as a control sensor READING DISPLAY FORMAT 3464 Dual Thermocouple Input Option Card Adds two new thermocouple inputs to the Model 340 appearing on the display as C and D The card has separate A Ds and excitation for each sensor A microprocessor on the card manages the A D and communication with the Model 340 Thermocouple inputs range from cryogenic temperature to 1000 C with built in room temperature compensation Curves for thermocouple types E K and AuFe 0 07 vs Cr are included The user can add other types The user can display 1 to 8 readings from any of the available inputs The units available are the sensor units of mV V Q kQ nF or temperature units of C or K Results of the math feature can pallies ectecten f f f 3465 Single Capacitance Input Option Card Adds a new capacitance input to the Model 340 appearing on the display as C The card has separate A D and excitation for the sensor A microprocessor on the card manages the A2. Instruments Silicon diodes are the best choice for general cryogenic use from 1 4 K to above room temperature Diodes are economical to use because they follow a standard curve and are interchangeable in many applications They are not suitable for use in ionizing radiation or magnetic fields Cernox thin film RTDs offer high sensitivity and low magnetic field induced errors over the 0 3 K to 420 K temperature range Cernox sensors require calibration Platinum RTDs offer high uniform sensitivity from 30 K to over 800 K With excellent reproducibility they are useful as thermometry standards They follow a standard curve above 70 K and are interchangeable in many applications Single excitation current may limit the low temperature range of NTC resistors 3 Non HT version maximum temperature 325 K Low temperature limited by input resistance range Low temperature specified with self heating error lt 5 mK Low temperature specified with self heating error lt 12 mK e mail info lakeshore com 90 Instruments Model 340 Temperature Controller Sensor Selection Typical Sensor Performance see Appendix F for sample calculations of typical sensor performance Example Nominal Typical Measurement Electronic Temperature Electronic Control Lake Shore Resistance Sensor Resolution Accuracy Accuracy including Stability Sensor Voltage Sensitivity Temperature Temperature Electronic Accuracy Temperature Equiv
3. 20 dB zune RJ i DES ly a 3003 Heater output conditioner at or above line frequency and gt 40 dB at or above double 3462 2 channel card for additional standard sensors line frequency A 144 mm W x 72 mm H x 165 mm D 3464 2 channel card for thermocouple sensors 5 7 in x 2 8 in x 6 5 in panel mount enclosure houses this 3465 1 channel card for capacitance sensors option and it weighs 1 6 kg 3 5 lb 3468 8 channel scanner card for silicon diodes PTC and NTC RTD sensors 3507 2SH Cable assembly for 2 sensors and 1 heater 8001 340 CalCurve factory installed the breakpoint table from a Calibrated sensor stored in the instrument 8072 IEEE 488 computer interface interconnect cable assembly CAL 340 CERT Instrument calibration with certificate HTR 25 25 Q 25 W cartridge heater HTR 50 50 Q 50 W cartridge heater RM 1 Rack mounting kit Area Any anwar SS FROM CONTROLLER TO HEATER CAUTION Op Se reo HE COMTRS oo om OLakeS Ire 3003 Heater Output Comdimoner www lakeshore com Lake Shore Cryotronics Inc 614 891 2244 fax 614 818 1600 e mail info lakeshore com
4. Cernox lt CX 1050 SD HT 14K 26566 Q 48449 kQ K 6 uK 0 4 mK 5 4 mK 12 uK with 1 4M 4 2 K 3507 2 Q 1120 8 kQ K 90 uK 3 4 mK 8 4 mK 180 uK calibration 77K 205 67 Q 2 4116 Q K 1 3 mK 68 mK 84 mK 2 6 mK 420 K 45 03 Q 0 0829 Q K 12 mK 520 mK 585 mK 24 mK Germanium GR 200A 250 0 5K 295702 221000 Q K 14ukK 0 2mK 45mK 28 uK with 0 5D 1 4K 1376 Q 2220 Q K 140 uK 0 9 mK 4 9 mK 280 uK calibration 4 2 K 198 9 Q 68 9 Q K 440 uK 3 8 mK 7 8 mK 880 uK 100 K 2 969 Q 0 025 Q K 40 mK 200 mK 216 mK 80 mK Germanium GR 200A 500 1 4K 8257 Q 19400 kQ K 52 uK 0 6 mK 46 mK 104 uK with 0 5D 4 2K 520 Q 245 kQ K 410 uK 3 0 mK 7 mK 820 uK calibration 10K 88 41 Q 19 5 Q K 515 uK 5 6 mK 10 6 mK 1 03 mK 100K T7510 0 014 Q K 72 mK 270 mK 286 mK 114 mK Carbon Glass CGR 1 500 1 4K 103900 Q 520000 Q K 58 uK 0 6 mK 4 6 mK 116 uK with 1 4L 4 2 K 584 6 Q 422 3 Q K 24 uK 1 2 mK 5 2 mK 48 uK calibration 77K 14 33 Q 0 098 Q K 3 1 mK 140 mK 165 mK 6 2 mK 300 K 8 55 Q 0 0094 Q K 32 mK K 1 2K 64 mK o Rox RX 102A AA 0 5K 3701 Q 5478 Q K 19 uK 0 7 mK 5 2 mK 38 uK with 0 3B 14K 2005 Q 667 Q K 45 uK 2 4 mK 7 4 mK 90 uK calibration 4 2 K 1370 Q 80 3 Q K 375 uK 16 mK 32 mK 750 uK 40K 1049 Q 1 06 Q K 29 mK 11K 1 2K 58 mK Thermocouple Type K 75K 5862 9 uV 15 6 uV K 26 mK 0 124 K Calibration not available 52 mK 50 mV 300 K 1075 3 uV 40 6 pV K 10 mK 0 038
5. Low Setpoint Heater output ranges 5 decade steps in power 1 Latching or Non Latching and Audible On Off Heater load type Resistive Resistive Actuators Display annunciator beeper and relays Heater load range 10 Q to 100 Q recommended 100 Q minimum ve 3 5 j umber SESE PEE UE 250 ie Contacts Normally open NO normally closed NC and common Heater noise lt 1 kHz RMS 50 uV 0 001 of output voltage lt 0 3 mV Contact Rating 30 VDC at 2 A Isolation Optical isolation between None Operation Activate relays on high or low alarms for any input or manual off on output and other circuits Connector Detachable terminal block eeo Dualbanana BNC Analog voltage outputs when not used as control loop 2 output Number 2 Scale User selected Update rate 20 readings per s Loop 1 Full Scale Heater Power at Typical Resistance Data source Temperature Sensor Units and Linear Equation Settings Input Source Top of Scale Bottom of Scale or Manual Heater Heater Maximum Current Range 10V Resistance Range 2A 1A 0 5A 0 25 A Resolution 1 25 mV Max output power 1 W 3 pu ow LOW pe Min load resistance 100 Q short circuit protected 4 4W 1W 250 mW 62 5 mW s 12 3 0 4W 400 mW 25 mW 6 25 mW Source impedance 0 01 Q 2 40 W 10 te 2 aa 625 a Digital 1 0 5 inputs and 5 outputs TTL voltage level compatible 4 at i 250 a 62 a W Data card PC card Type II slot used for curve transfer w u j 2k setup storage and data logging 5 100 W 25W 6 25 W 1 56 W 4 10W 2 5 W 62
6. temperature It can also be used to make a more predictable approach to a setpoint temperature The zone feature can automatically change control parameter values for operation over a large temperature range Values for ten different temperature zones can be loaded into the instrument which will select the next appropriate zone value on setpoint change Instruments 87 The Model 340 can run a set of instrument instructions called an internal program Each program represents the temperature changes needed to conduct a user s experiment The setpoint can be changed or ramped up and down and other controller parameters can be programmed For simple experiments the internal program eliminates the need for computer control It is also common for the internal program to be used along with the computer interface so the computer is not slowed down by temperature control overhead Several math features are included to improve usability and aid in setting up experiments It is often useful to have reading filters and maximum and minimum calculations easily available on the front panel The Model 340 also computes a linear equation on reading data to allow flexibility in how the display represents experimental inputs Interface The Model 340 can be fully involved in computer controlled experiments It is equipped with IEEE 488 and RS 232C interfaces Either interface can send settings to the Model 340 and collect reading data from it Even the
7. 0 1 rdg 2 mQ 1mV negative 02 to 30Q 30 uA 100 uQ 3mQ 0 02 rng 0 1 rdg 6 mQ 340 3462 negative 0 Qto 100 Q 10 uA Imor 10 mQ 0 02 rng 0 1 rdg 20 MQ negative 0 Q to 300 Q 3 pA Umom 30 MQ 0 02 rng 0 1 rdg 60 MQ negative 0 Qto 1 kQ 1 uA 10mQ 0 10 0 02 rng 0 1 rdg 0 2 Q negative 0 Q to 3 kQ 300 nA 10 mQ 0 3 2 0 02 rng 0 1 rdg 0 62 negative 0Q to 10 kQ 100nA OT O 0 02 rng 0 1 rdg 20 negatie 0 Q to 30 kQ 30 nA 01 Q 3Q 0 02 mg 0 1 rdg 6Q NTC RTD negative 0 Q to 30 Q 300 uA 100 yQ S00 u2 0 02 mg 0 05 rdg 600 pO 10 mV negative 0 Qto 100 Q 100 uA 1 mQ 1 mQ 0 02 mg 0 05 rdg 2 mQ 340 3462 negative 0 Q to 300 Q 30 uA IMQ 3 MQ 0 02 mg 0 05 rdg 6 mQ negative 0 Qto1 kQ 10 uA 10 mQ 10 m2 0 02 mg 0 05 rdg 20 MQ negative 0 Q to 3 kQ 3 yA a 10 MQ 30 ma 0 02 mg 0 05 rdg 60 MQ negative 09 to 10 kQ 1 uA 01 Q 0 1 Q 0 02 mg 0 05 rdg 0 2 Q negative 0 Q to 30 kQ 300 nA 0 1 Q 0 3 Q 0 02 mg 0 05 rdg 0 6 Q negative 0 2 to 100 kQ 100 nA 19 3Q __ 0 02 mg 0 05 rdg 6Q negative lt 0 to 300 kQ 30 nA 19 930 QD 0 02 rng 0 25 rdg 60 Thermocouple positive 25 mV NA 0 1 uV 0 2 uV 1 uV 0 05 of rdg 0 4 uV 3464 positive 50 mV _ NA 0 1 uV 0 4 uV 1 uV 0 05 of rdg 0 8 uV Capacitance positive or negative 0 nF to 150 nF 4 88 kHz 10 pF 2 0 pF 50 pF 0 1 of rdg 4 0 pF 3465 1 V square wave positive or negative 0 nF to 15 nF 4 88 kHz 1 pF 0 2 pF 50 pF 0 1 of rdg 0 4 pF 1V square wave a Diode negative 0 V to 2 5 V
8. 10 uA 0 01 100uV 20 uV 160 uV 0 01 of rdg 8 8 40uV 3468 negative OVto7 5V 10 uA 0 01 100 uV 20 uV 160 uV 0 02 of rdg 40 uV PTC RTD positive 0 Q to 250 Q 1 mA 0 3 10 mQ 2 mQ 0 004 Q 0 02 of rdg 4 mQ 3468 positive 0 Q to 500 Q 1 mA 0 3 10 mQ 2 mQ 0 004 Q 0 02 of rdg 4mQ positive 0Qt050002 1mMA 0 3 100 mQ 20 MQ 0 06 Q 0 04 of rdg 40 MQ NTC RTD negative 0 Q to 7500 Q 10 uA 0 01 100 mQ 50 MQ 0 01 Q 0 04 of rdg oio 3468 10 Control stability of the electronics only in an ideal thermal system Thermometry Sensor Input Configuration Number of inputs 2 included additional inputs optional Input configuration Each input is factory configured as diode RTD Thermocouple Diode RTD Thermocouple Capacitance and capacitance are optional and sold as additional input cards Isolation Sensor inputs optically isolated from other circuits but not from Measurement 4 lead differential 2 lead 4 lead each other type room temperature A D resolution 24 bit analog to digital compensated Input accuracy Sensor dependent refer to Input Specifications table Excitation Constant current with NA 4 88 kHz Measurement resolution Sensor dependent refer to Input Specifications table current reversal for RTDs 1 V square wave Maximum update rate Up to 20 readings per s onan input 40 readings per s on all inputs Supported Diodes Silicon GaAlAs Most thermocouple CS 501GR Autorange Automatically selects appropriate NTC RTD range sensors RTDs 100 Q Pla
9. 5 mW 156 mW 25 Q 3 1W 250mW 625mW 15 6 mW General 7 g 100 mW 25 mW 6 25 mW 1 56 mW Ambient temp range 20 C to 30 C 68 F to 86 F for specified accuracy 1 10 mw 25mW 625 uW 156 uW 15 C to 35 C 59 F to 95 F for reduced accuracy i o 100 5 50W 50W 125W 312W Power requirements 100 120 220 240 VAC 5 10 50 or 60 Hz 190 VA Size 432 mm W x 89 mm H x 368 mm D 4 20W 5W 1 25 W 312 mW 17 in x 3 5 in x 14 5 in full rack 50 Q 3 2W 500 mW 125 mW 31 2 mW Weight 8 kg 17 6 Ib approx 2 200 mW 50 mW 12 5 mW 3 12 mW Approval CE maik 1 20 mW 5 mW 1 25 mW 312 uW www lakeshore com Lake Shore Cryotronics Inc 614 891 2244 fax 614 818 1600 e mail info lakeshore com Model 340 Temperature Controller Extending Temperature Controller Heater Power It is often necessary to extend the heater power of Ordering Information a cryogenic temperature controller to conduct Partnumber Description experiments above room temperature This diagram illustrates a practical way to increase the control 340 2 diode resistor inputs temperature controller output of the Model 340 to several hundred watts Fane a j 7 h Select a power configuration A programming resistor Rii 1S placed across the VAC 100 Instrument configured for 100 VAC with U S power cord controller s heater output current source As the VAC 120 Instrument configured for 120 VAC with U S power cord heater output current changes a ch
10. 86 Instruments Model 340 Temperature Controller Model 340 Temperature Controller BLakeShore Tuning A 10 3401 apm Set 19 K Hest 8 1u 340 Temperature Controller S e e e 5 e S o l U ma seaae BEE SG S k 12679 5 e beca semm es pie ie pt ted bb ted ba Bee Sees E Features E Operates down to 100 mK with appropriate NTC RTD sensors E Two sensor inputs expandable to ten sensor inputs E Supports diode RTD capacitance and thermocouple sensors E Sensor excitation current reversal eliminates thermal EMF errors Two autotuning control loops 100 W and 1 W M TEEE 488 and RS 232C interfaces analog outputs digital I O and alarm relays www lakeshore com Lake Shore Cryotronics Inc Product Description The Model 340 is our most advanced temperature controller and offers unsurpassed resolution accuracy and stability for temperature measurement and control applications to as low as 100 mK Operating with diodes platinum RTDs and negative temperature coefficient NTC resistor sensors the Model 340 is expandable to ten sensor inputs or to operate with thermocouple or capacitance sensors It has two control loops with the first loop powered to 100 W Sensor Inputs The Model 340 features two inputs with high resolution 24 bit analog to digital converter and low noise circuit design providing temperature readings with resolution as low as 0 1 mK at 4 2 K Sensor
11. D and communication with the Model 340 The 3465 is intended to control temperature in strong magnetic fields using a Lake Shore Model CS 501 capacitance temperature sensor een Ah iler will 3468 Eight Channel Input Option Card eser can SEEC The SENTON TYPE GNG MECONTOUETWI Adds eight sensor inputs to the Model 340 The optional inputs automatically select the sensor units excitation and range If special type is selected the user can choose any available are broken into two groups of four and appear on the display as excitation and input range C1 C4 for Input C D1 D4 for Input D The 3468 includes two A D converters one for each group of four inputs and individual excitation for each sensor Each input group must use the same sensor type but the two groups can be different The multiplexed inputs provide new readings for all eight inputs twice each second The 3468 inputs are not recommended for temperature control because the reading rate is too slow to allow good stability A variety of sensor types are supported by the Model 3468 but not as many as the standard inputs Diode and platinum configurations have similar specifications to the standard inputs reduced only slightly to account for multiplexing However the NTC RTD configuration is quite different than the standard inputs The option has a limited resistance range of 7 5 kQ with a fixed current excitation of 10 pA This limitation significantly reduces the low temp
12. K from Lake Shore 20 mK 3464 600 K 13325 uV 41 7 pV K 10 mK 0 184 K 20 mK 1505 K 49998 3 uV 36 006 uV K 12 mK 0 73 K 24 mK Capacitance CS 501GR 4 2K 6 nF 27 pF K 7 4 mK 2 08 K Calibration not available 14 8 mK 150 nF SAK 9 1 nF 52 pF K 3 9 mK 1 14K from Lake Shore 7 8 mK 3465 200 K 19 2 nF 174 pF K 1 mK 0 4 K 2 mK 7 Typical sensor sensitivities were taken from representative calibrations for the sensor listed 8 Control stability of the electronics only in an ideal thermal system Non HT version maximum temperature 325 K www lakeshore com Lake Shore Cryotronics Inc 614 891 2244 fax 614 818 1600 e mail info lakeshore com Specifications Input Specifications Model 340 Temperature Controller Sensor Input Excitation Display Measurement Electronic Electronic Temperature Range Current Resolution Resolution Accuracy Control Coefficient Stability Diode negative OVto2 5V 10 uA 0 05 10 uV 10 pV 80 uV 0 005 of rdg 20 uV 340 3462 negative OVto7 5V 10 uA 0 05 10 uV 10 uV 80 uV 0 01 of rdg 20 uV PTC RTD positive 09t02509 1m 1mQ 1moQ 0 002 Q 0 01 of rdg 2 mQ 340 3462 positive 0 Q to 500 Q 1 mA 1 mQ 1mQ 0 002 Q 0 01 of rdg 2 mQ positive 0 Q to 2500 Q 0 1 mA 10 mQ 10 mQ lt 0 03 Q 0 02 ofrdg 20 MQ NTC RTD negative 09t010Q 100 uA 100 uQ 1 mQ 0 02 rng
13. alents Equivalents CalCurve and Equivalents 340 3462 Calibrated Sensor Silicon Diode DT 670 C0 13 1 4K 1 664 V 12 49 mV K 0 8 mK 13 mK 25 mK 1 6 mK with 1 4H 77K 1 028 V 1 73 mV K 5 8 mK 76 mK 98 mK 11 6 mK calibration 300 K 0 5597 V 2 3 mV K 4 4 mK 47 mK 79 mK 8 8 mK 500 K 0 0907 V 2 12 mV K 4 8 mK 40 mK 90 mK 9 6 mK _ Silicon Diode DT 470 SD 13 1 4K 1 6981V 13 1 mV K 0 8 mK 13 mK 25 mK 1 6 mK with 14H 77K 1 0203 V 1 92 mV K 5 2 mK 69 mK 91 mK 10 4 mK calibration 300 K 0 5189 V 2 4 mV K 4 2 mK 45 mK 77 mK 8 4 mK 475 K 0 0906 V 2 22 mV K 4 5 mK 38 mK 88 mK 9 mK GaAlAs Diode TG 120 SD 14K 5 391 V 97 5 mV K 0 1 mK 7 mK 19 mK 0 2 mK with 1 4H 77K 1 422 V 1 24 mV K 8 1 mK 180 mK 202 mK 16 2 mK calibration 300 K 0 8978 V 2 85 mV K 3 6 mK 60 mK 92 mK 7 2 mK 475K 0 3778 V 3 15 mV K 3 2 mK 38 mK 88 mK 6 4 mK 100 Q Platinum RTD PT 103 with 30K 3 660 Q 0 191 Q K 5 3 mK 13 mK 23 mK 10 6 mK 500 Q Full Scale 14J calibration 77K 20 38 Q 0 423 Q K 2 4 mK 10 mK 22 mK 4 8 mK 300 K 110 35 Q 0 387 Q K 2 6 mK 34 mK 57 mK 5 2 mK 500 K 185 668 Q 0 378 Q K 2 7 mK 55 mK 101 mK 5 4 mK Cernox CX 1010 SD 0 3 K 2322 4 Q 10785 Q K 3 uK 0 2 mK 3 7 mK 6 uK with 0 3L 0 5K 1248 2 Q 2665 2 Q K 12 uK 0 5 mK 5 mK 24 uK Calibration 4 2K 277 32 Q 32 209 Q K 94 uK 6 2 mK 11 2 mK 188 uK 300 K 30 392 Q 0 0654 Q K 15 mK 540 mK 580 mK 30 mK o
14. analog outputs relays and Digital I O can be controlled by computer interface The Model 340 has several features to make it more valuable as part of a larger measuring system Two analog voltage outputs can be used to report a voltage that is proportional to the temperature of an input The outputs can be controlled manually as a voltage source for any other application Two relays can be used with the alarm setpoints in latching mode for error detection or in nonlatching mode for simple on and off control Digital 1 0 can be used with an external scanner or manually Data Card O IFFE 488 Interface Serial RS 232C 1 0 Digital 1 0 Line Input Assembly Heater Fuse Heater Output Option Slots www lakeshore com Lake Shore Cryotronics Inc 614 891 2244 Relays Analog Outputs Standard Sensor Inputs fax 614 818 1600 e mail info lakeshore com 88 Instruments Model 340 Temperature Controller Configurable Display Additional Inputs Available For Model 340 The Model 340 includes a graphic LCD with fluorescent backlight display that is fully configurable and can display The following optional inputs are available for the Model 340 up to eight readings Only one can be installed at a time and the standard inputs stay in the instrument and remain fully functional Calibration for the option is stored on the card so it can be installed in the field without recalibration
15. anging voltage VAC 120 ALL Instrument configured for 120 VAC with U S power cord a z and universal Euro line cord and fuses for 220 240 VAC setting E A Ram eat e E VAC 220 Instrument configured for 220 VAC with universal program a large external power supply Roan should Sro iieo be chosen so that a low current range of the controller VAC 240 Instrument configured for 240 VAC with universal can be used The control output of loop 2 on the P i Euro line cord Model 340 is a voltage thus it can be connected Other country line cords available consult Lake Shore directly to the external power supply without Rome Accessories includad 106 009 Heater output connector dual banana jack 106 233 Two sensor mating connector 6 pin DIN plugs Lake Shore Se used for sensor inputs controller OVto 10V ay 106 737 6 pin terminal block used for relays connector accepts up to 12 AWG wire 340 ONLY 2001 4 wire RJ11 cable assembly 4 6 m 14 ft long R ee ant used with RS 232C interface Rae heater 2003 RJ11 to DE 9 adapter adapts RJ11 receptacle to female DE 9 connector connects Model 340 to customer computer rear RS 232C serial port Calibration certificate Se MAN 340 Model 340 user manual 3003 Heater Output Conditioner The heater output conditioner is a passive filter which Options and accessories further reduces the already low Model 340 heater output 2002 RJ11 to DB 25 adapter noise The typical insertion loss for the Model 3003 is
16. erature range of the inputs The option also does not support current reversal to reduce the effect of thermal EMF voltages The original standard inputs remain fully functional allowing the Model 340 to measure 10 sensors when the option is installed www lakeshore com Lake Shore Cryotronics Inc 614 891 2244 fax 614 818 1600 e mail info lakeshore com Model 340 Temperature Controller Sensor Temperature Range sensors sold separately Mode Useful Range Magnetic Field Use Diodes Silicon Diode DT 670 SD 1 4Kto 500K T 60K amp B lt 3T 340 3462 Silicon Diode DT 670E BR 30 K to 500 K T gt 60K amp B lt 3T Silicon Diode DT 414 1 4Kto375K T260K amp B lt 3T Silicon Diode DT 421 1 4Kt0325K_ T260K amp B lt 3T Silicon Diode DT 470 SD 1 4Kto 500K T gt 60K amp B lt 3T Silicon Diode DT 471 SD 10 K to 500 K T gt 60K amp B lt 3T GaAlAs Diode TG 120 P 1 4 K to 325 K T gt 4 2K amp B lt 5T GaAlAs Diode TG 120 PL 1 4 K to 325 K T gt 4 2K amp B lt 5T GaAlAs Diode TG 120 SD 1 4 K to 500 K T gt 4 2K amp B lt 5T Positive Temperature 100 Q Platinum PT 102 3 14 K to 873 K T gt 40K amp B lt 25T Coefficient RTDs 100 Q Platinum PT 111 14 K to 673 K T gt 40K amp B lt 25T 340 3462 Rhodium Iron RF 800 4 1 4 K to 500 K T gt 77K amp B lt 8T Rhodium Iron RF 100T U 1 4 K to 325 K T gt 77K amp B lt 8T Negative Cernox CX 1010 0 3 K to 325K T gt 2K amp B l
17. p B lt 3T Silicon Diode DT 470 SD 1 4Kto 500K T 60K amp B lt 3T Silicon Diode DT 471 SD 10 K to 500 K T gt 60K amp B lt 3T GaAlAs Diode TG 120 P 1 4 K to 325 K T gt 42K amp B lt 5T GaAlAs Diode TG 120 PL 1 4 K to 325 K T gt 42K amp B lt 5T GaAlAs Diode TG 120 SD 1 4 K to 500 K T gt 4 2K amp B lt 5T Positive Temperature 100 Q Platinum PT 102 3 14 K to 800 K T gt 40K amp B lt 25T Coefficient RTDs 100 Platinum PT 111 14 K to 673 K T gt 40K amp B lt 25T 3468 Rhodium Iron RF 800 4 1 4 K to 500 K T gt 77K amp B lt 8T Rhodium lron RF 100T U 1 4 K to 325 K T gt 77K amp B lt 8T Negative Cernox CX 1010 2Kto325K T gt 2K amp B lt 19T Temperature Cernox CX 1030 HT 3 5 K to 420 K T gt 2K amp B lt 19T Coefficient RTDs Cernox CX 1050 HT 4Kto420 K6 T gt 2K amp B lt 19T 3468 _ Cernox CX 1070 HT 15Kto420K T gt 2K amp B lt 19T Cernox CX 1080 HT 50K to 420K T gt 2K amp B lt 19T Germanium GR 200A B 1000 2 2 Kto 100 K Not Recommended Germanium GR 200A B 1500 2 6 K to 100 K Not Recommended Germanium GR 200A B 2500 3 1 Kto 100 Kt Not Recommended Carbon Glass CGR 1 500 4Kto325K T gt 2K amp B lt 19T Carbon Glass CGR 1 1000 5 K to 325 K T gt 2K amp B lt 19T Carbon Glass CGR 1 2000 6 K to 325 K T gt 2K amp B lt 19T Rox RX 102A 14Kto40K T gt 2K amp B lt 10T www lakeshore com Lake Shore Cryotronics Inc 614 891 2244 fax 614 818 1600 89
18. r output display Numeric display in percent of full scale for power or current Derivative rate 1 to 1000s with 1 s resolution bar graph display of heater output available Manual output 0 to 100 with 0 01 setting resolution Heater output resolution 0 1 numeric or 2 graphical Zone control 10 temperature zones with P I D manual heater power out Keypad Numeric plus special function and heater range Front panel features Front panel curve entry display brightness control Setpoint ramping 0 1 K per min to 100 K per min and keypad lock out Safety limits Setpoint limit curve temp limits heater output slope limit heater range limit power up heater off and short circuit protection Tnterfacas ee IEEE 488 2 interface Heater Output Specifications Features SH1 AH1 T5 L4 SR1 RL1 PPO DC1 DTO CO E1 Reading rate To 20 readings per s Loop 1 Loop 2 Software support National Instruments LabVIEW driver Serial interface Heater output type Variable DC current source Variable DC voltage Electrical format RS 232C Heater output D A resolution 18 bit 14 bit Max baud rate 19 200 baud Connector RJ 11 Max heater power if 100w 1y Reading rate To 20 readings per s Max heater output current 2A 0 1 A Alarms Heater output compliance 50V 10V Number Two high and low for each installed input Heater source impedance NA 0 012 Data source Temperature Sensor Units and Linear Equation Settings Source High and
19. re Controller Temperature Control The Model 340 offers two proportional integral derivative PID control loops A PID control algorithm calculates control output based on temperature setpoint and feedback from the control sensor Wide tuning parameters accommodate most cryogenic cooling systems and many small high temperature ovens Control output is generated by a high resolution digital to analog converter for smooth continuous control The user can manually set the PID values or the autotuning feature of the Model 340 can automate the tuning process The main heater output for the Model 340 is a well regulated variable DC current source Heater output is optically isolated from other circuits to reduce interference and ground loops Heater output can provide up to 100 W of variable DC power to control Loop 1 Features have been added to the Model 340 to minimize the possibility of overheating delicate sensors and wiring in cryostats These features include setpoint temperature limit heater current range limit internal heater diagnostics and a fuse in the heater output wiring The Model 340 also has the ability to run a second independent control loop intended to reduce the temperature gradients in one cooling system rather than to run two different cooling systems The setpoint ramp feature allows smooth continuous changes in setpoint This feature permits faster experiment cycles since data can be taken as the system is changing in
20. s are optically isolated from other instrument functions for quiet and repeatable sensor measurements 614 891 2244 fax 614 818 1600 Appropriate sensor excitation and input gain can be selected from the front panel An autorange mode keeps the power in NTC resistors low to reduce self heating as sensor resistance changes by many orders of magnitude Automatic current reversal with rounded square wave excitation for NTC resistors eliminates the effect of thermal EMF Standard temperature response curves for silicon diodes platinum RTDs and many thermocouples are included Up to twenty 200 point CalCurves for Lake Shore calibrated sensors or user curves can be loaded into non volatile memory via a computer interface or the instrument front panel CalCurves can be installed at the factory when purchased with a Model 340 or they can be field installed using the data card slot A built in SoftCal algorithm can also be used to generate curves for silicon diodes and platinum RTDs for storage as user curves 1 The Lake Shore SoftCal algorithm for silicon diode and platinum RTD sensors is a good solution for applications that need more accuracy than a standard sensor curve but do not warrant traditional calibration SoftCal uses the predictability of a standard curve to improve the accuracy of an individual sensor around a few known temperature reference points e mail info lakeshore com Model 340 Temperatu
21. t 19T Temperature Cernox CX 1030 HT 0 3 K to 420 K5 T gt 2K amp B lt 19T Coefficient RTDs Cernox CX 1050 HT 1 4K to420K T gt 2K amp B lt 19T 340 3462 Cernox CX 1070 HT 4 K to 420 K T gt 2K amp B lt 19T Cernox CX 1080 HT 20K to 420K T gt 2K amp B lt 19T Germanium GR 200A 30 0 1 K to 5 K Not Recommended Germanium GR 200A 50 0 2 K to 40 K Not Recommended Germanium GR 200A 100 0 3 K to 100 K Not Recommended Germanium GR 200A 250 0 5 K to 100 K Not Recommended Germanium GR 200A B 500 1 4 K to 100 K Not Recommended Germanium GR 200A B 1000 1 4 K to 100 K Not Recommended Germanium GR 200A B 1500 1 4 K to 100 K Not Recommended Germanium GR 200A B 2500 1 4 K to 100 K Not Recommended Carbon Glass CGR 1 500 1 4Kto325K T gt 2K amp B lt 19T Carbon Glass CGR 1 1000 1 7K to 325K T gt 2K amp B lt 19T Carbon Glass CGR 1 2000 2Kto325K T gt 2K amp B lt 19T Rox RX 102 0 1Kto40K T gt 2K amp B lt 10T Rox RX 103 1 4 K to 40 K T gt 2K amp B lt 10T Rox RX 202 0 1Kto40K T gt 2K amp B lt 10T Thermocouples Type K 9006 006 3 2 K to 1505 K Not Recommended 3464 Type E 9006 004 3 2 K to 934 K Not Recommended Chromel AuFe 0 07 9006 002 1 2 K to 610 K Not Recommended Capacitance CS 501 1 4 K to 290 K Not Recommended 3465 Diodes Silicon Diode DT 670 SD 1 4Kto 500K T 60K amp B lt 3T 3468 Silicon Diode DT 670E BR 30 K to 500 K T gt 60K amp B lt 3T Silicon Diode DT 414 1 4Kto375K T 60K amp B lt 3T Silicon Diode DT 421 1 4Kto325K T 60K am
22. tinum types User curves Forty 200 point CalCurves or user curves 1000 Q Platinum f SoftCal Improves accuracy of DT 470 diode or platinum RTD sensors Germanium Carbon Glass Math Maximum and minimum of input readings and linear equation Cernox and Rox Filter Averages input readings to quiet display settable time constant Standard DT 470 DT 500D Type E Type K Type T None curves DT 670 PT 100 AuFe 0 07 vs Cr PT 1000 RX 102A AuFe 0 03 vs Cr RX 202A Input 6 pin DIN Ceramic isothermal 6 pin DIN connector block www lakeshore com Lake Shore Cryotronics Inc 614 891 2244 fax 614 818 1600 e mail info lakeshore com Model 340 Temperature Controller Control Front Panel Control loops 2 Display Graphic LCD with fluorescent backlight Control type Closed loop digital PID with manual heater power No of reading displays 1 to 8 output or open loop Display units Temperature in K C or sensor units Tuning Autotune one loop at a time manual PID zones Temp display resolution 0 0001 K below 10 K 0 001 K above 10 K Control stability Sensor dependent to 2x measurement resolution Sensor units Sensor dependent to 6 digits in an ideal thermal system display resolution PID control settings Setpoint setting Same as display resolution Proportional gain 0 to 1000 with 0 1 setting resolution resolution actual resolution is sensor dependent Integral reset 1 to 1000 with 0 1 setting resolution Heate
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