230 Series Temperature Transmitters/Monitors Catalog
Contents
1. Mechanical mounting is easy because the 230 Series is built on a standard size VME card It fits directly into a single height 3U VME card holder The transmitter does not use the electrical bus format only its physical shape and power supply The Model 234 includes a RJ11 serial interface Model 234 measurement scales excitation resolution and accuracy 230 Series Temperature Transmitters Monitors heating at low temperatures Sensor resistance excitation rdg 1 The Model 234 employs an analog control voltage circuit to maintain a constant voltage signal 0 101060 5 mV 0 0003 Q 0 5 0 0006 across the sensor A series of reference 1 4 5 0 to 12 5 0 5 mV 0 0001 Q 0 1 0 0013 resistors convert the resulting sensor current 2 90 to 60 0 10 mV 0 001 Q 0 1 0 006 to a voltage A microcontroller reads the 3 45 0 to 125 0 5 mV 0 001 Q 0 1 0 013 voltage with an A D converter calculates 4 90 0 to 360 Q 10 mV 0 003 0 0 1 0 036 sensor resistance and converts the resistance 290 KQ to 1 25 kQ 10 mV 0 01 Q 0 1 0 13 to temperature by table interpolation requires 900 KQ to 3 6 kQ 10 mV 0 03 Q 0 1 0 36 a CalCurve for temperature conversion The a z Za n m sensor excitation voltage is reversed each 5 Tee a ar oma reading to compensate for thermal voltages and offsets Lake Shore Cryotronics Inc t 614 891 2244 f 614 818 1600 e info lakeshore com www lakeshore com2. 6 mK 7 6 mK 1 5 mK Range 3 15 3 mK 15 3 mK 7 6 mK Range 4 24 8 mK 24 8 mK 15 3 mK Range 5 36 2 mK 36 2 MK 22 9 mK Range 6 76 3 MK 76 3 mK 19 1 mK Output accuracy Current 2 pA 0 01 of full scale 2 HA 0 01 of full scale 5 pA 0 025 of full scale Temperature equivalence Range 1 2 5 mK Not used 3 1 mK Range 2 12 5 mK 12 5 mK 6 2 mK Range 3 25 mK 25 mK 31 2 mK Range 4 41 mK 41 mK 62 5 mK Range 5 59 mK 59 mK 93 7 mK Range 6 125 mK 125 mK 78 1 mK Output temperature coefficient Current C ambient 0 0055 of output current per C 0 0055 of output current per C 2 YA C 0 01 C Temperature equivalence Range 1 1 mK C Not used 1 mK C Range 2 6 mK C 6 mK C 2 mK C Range 3 12 mK C 12 mK C 10 mK C Range 4 18 mK C 18 mK C 20 mK C Range 5 26 mK C 26 mK C 30 mK C Range 6 55 mK C 55 mK C 25 mK C 0 mA to 20 mA output 0 V to 10 V with 500 0 02 load resistor Output resolution Voltage 0 6 mV 0 6 mV 0 61 mV Temperature equivalence Range 1 1 2 mK Not used 0 6 mK Range 2 6 1 mK 6 1 mK 1 2 mK Range 3 12 2 mK 12 2 mK 6 1 mK Range 4 19 8 mK 19 8 mK 12 2 mK Range 5 29 mK 29 mK 18 3 mK Range 6 61 mK 61 mK 15 2 mK Output accuracy Voltage 3 mV 0 03 of full scale 3 mV 0 03 of full scale 4 5 mV 0 025 of full scale 0 02 resistor accuracy Temperature equivalence Range 1 6 mK Not used 4 5 mK Range 2 30 mK 30 mK 9 0 mK Range 3 60 mK 60 mK 45 0 mK Range 4 98 mK 98 mK 90 0 mK Range 5 14
3. RJ11 cable to a 9 pin RS 232C serial port on rear of computer VME rack and power supply holds up to 12 transmitters VME rack blank panel 231 CalCurve data field installed 231P CalCurve data field installed 234 234D CalCurve data field installed Instrument recalibration with certificate Instrument recalibration with certificate Instrument recalibration with certificate All specifications are subject to change without notice E visa Se aaa e Lake Shore Cryotronics Inc t 614 891 2244 f 614 818 1600 e info lakeshore com www lakeshore com Cryogenic Instruments 129
4. and DT 670 diode sensors It also supports a single CalCurve option for calibrated sensors TG 120 diodes require a CalCurve Model 231P The Model 231P uses a PT 100 Series platinum sensor The Model 231P excites the sensor with a 500 pA current to produce a measurable signal Either the standard platinum curve IEC 751 or a CalCurve is used for temperature conversion Model 234 The Model 234 operates with Cernox carbon glass germanium or other negative temperature coefficient NTC resistance temperature sensors The Model 234 excites the sensor with a constant voltage of 10 mV or less to minimize the effects of sensor self Once one of the 230 Series obtains temperature data it transmits a current of 4 mA to 20 mA The current output changes linearly with sensor temperature Output scale depends on the selected temperature range Several switch selected ranges are available Highest accuracy and sensitivity are achieved when the output is set for a narrow temperature band A 0 mA to 20 mA output is also available to convert output to a voltage scaled from zero A 500 0 02 output load resistor produces the maximum full scale output of 10 V Circuitry for the Model 230 Series is powered by a single 5 VDC supply applied either from the front panel connector or the power pins on the VME bus connector The outputs are isolated so several transmitters can be run off the same supply without interference
5. at 300 K 6 6 mK at 77 K 14 mK up to 800 K 67 mK at 300 K Electronic measurement accuracy Sensor units 75 uV 0 01 of reading 0 05 0 0 05 of reading Range dependent see table on 126 Temperature accuracy 0 07 K at 4 2 K 0 2 K at 30 K 2 mK at 4 2 K 0 16 K at 77 K 0 15 Kat 77 K 8 mK at 10 K 0 12 K at 300 K 0 3 K at 300 K 18 mK at 77 K 0 7 K up to 800 K 1 2 K at 300 K Measurement temperature coefficient Sensor units of reading C 0 0006 of resistance rdg C 0 002 of resistance rdg C 0 0125 of resistance rdg C ambient Temperature equivalence 3 mK C at 4 2 K 0 4 mK C at 30 K 0 18 mK C at 4 2 K 3 mK C at 77 K 1 mK C at 77 K 0 8 mK C at 10 K 1 2 mK C at 300 K 6 mK C at 300 K 18 mK C at 77 K 18 mK C at 800 K 100 mK C at 300 K Magnetic field use Silicon diode Recommended for NA NA T 60KandB lt 3T GaAlAs diode Recommended for NA NA T 42KandB lt 5T Platinum NA Recommended for NA T gt 40KandB lt 2 5T Carbon glass NA NA Recommended for T 2KandBs19T ee re er lt 23a _ General Ambient temperature range 15 C to 35 C 15 C to 35 C 15 C to 35 C Power requirements 5 0 25 VDC 500 mA 2 5 W 5 0 25 VDC 500 mA 2 5 W 234 5 0 25 VDC 500 mA 2 5 W Enclosure type See diagrams See diagrams See diagrams Mounting VME end panel and back plane VME end panel and back plane VME end panel and back plane transmitters do not use transmitters do not use transmitters do not use electrical bu
6. 230 Series Temperature Transmitters Monitors Cryogenic Instruments 125 230 Series Temperature Transmitters Monitors ag aij ek i aL Z bce JU niy ae 0 oe of EEEE T 4 EET O we EETA A os J J T 17 aah i 5 A GH Ps ee A a ni We oF ve z i D p i f opie RAARANSS k 1 es zo i PELL ne oe ae a kfz annt ma S ire a h ix wad gt T5 A 7 E os ie Tae r 7 ca Fi at Bh Sensor input fully isolated from power supply potential Operates from 1 4 K to 500 K with appropriate diode Different models support various sensor types 4 lead differential measurement Operates from 1 4 K to 800 K with appropriate PTC RTD Output range of 4 mA to 20 mA or 0 mA to 20 mA 0 V to 10 V Available rack mount case holds up to 12 units a Operates from 100 mK to 420 K with appropriate NTC RTD Full 3 year standard warranty pa 0 ass an FA Includes serial interface Lake Shore Cryotronics Inc t 614 891 2244 f 614 818 1600 e info lakeshore com vo am Cryogenic Instruments Model 231 The Model 231 operates with either silicon diode or gallium aluminum arsenide GaAlAs diode sensors Excited with a 10 pA current source from the Model 231 the sensors produce a voltage that depends on temperature A microcontroller reads the voltage through an A D converter and translates it into temperature using a temperature response curve The Model 231 includes two standard curves for DT 470
7. 230 Series Temperature Transmitters Monitors Cryogenic Instruments 127 1 1 Number of inputs 1 Measurement type 4 lead differential 4 lead differential 4 lead differential Sensor type Silicon diode GaAlAs diode Platinum Carbon glass germanium Cernox Sensor temperature coefficient Negative Positive Negative Sensor units Volts V Ohms 0 Ohms 0 Input range OVto5V 0 0 to 312 0 1 0 to 300 KQ Sensor excitation 10 pA 0 1 DC current 500 pA 0 02 DC current Constant voltage pinned at 5 mV or 10 mV dependent on resistance range Update rate 5 rdg s 5 rdg s 4 rdg s 2 rdg s on Scale 0 only Precision curve storage One curve loaded at Lake Shore One curve loaded at Lake Shore One curve loaded at Lake Shore or in the field via serial interface Example Lake Shore sensor DT 470 CO PT 103 CGR 1 1000 with 1 4L calibration Sensor temperature range 1 4 K to 475 K 30 K to 800 K 1 4 K to 325 K Standard curve Lake Shore Curve 10 IEC 751 Requires calibrated sensor and CalCurve Typical sensor sensitivity 30 mV K at 4 2 K 0 19 Q K at 30 K 700 Q K at 4 2 K 40 mK at 77 K 11 mK at 77 K 0 12 mK at 30 K 32 mK at 300 K 13 mK at 300 K 6 6 mK at 77 K 14 mK up to 800 K 67 mK at 300 K Measurement resolution Sensor units 76 3 uV 4 8 mQ Range dependent Temperature equivalence 2 5 mK at 4 2 K 22 mK at 30 K 0 04 mK at 4 2 K 40 mK at 77 K 11 mK at 77 K 0 12 mK at 30 K 32 mK at 300 K 13 mK
8. 3 mK 143 mK 135 0 mK Range 6 300 mK 300 mK 112 5 mK Output temperature coefficient Voltage output C ambient 0 008 C 0 008 C 1 25 mV C 0 01 C 0 0025 C of load resistor Temperature equivalence Range 1 2 mK C Not used 1 2 mK C Range 2 8 mK C 8 mK C 2 5 mK C Range 3 16 mK C 16 mK C 12 mK C Range 4 26 mK C 26 mK C 25 mK C Range 5 38 mK C 38 mK C 36 mK C Range 6 80 mK C 80 mK C 30 mK C Lake Shore Cryotronics Inc t 614 891 2244 f 614 818 1600 e info lakeshore com www lakeshore com 230 Series Temperature Transmitters Monitors ET pa e Cable Lengi 43 m id tt 2002 2308 12 Multiple card enclosure 2308 12 The 2308 12 VME card case holds up to 12 temperature transmitters A 5 VDC power supply with universal input is provided with the case Wall mount power supplies are not necessary with a 2308 12 Card slots 12 Output voltage 5 VDC 100 mV peak to peak ripple Output current 6 A max Input power Universal 85 to 265 VAC 47 to 440 Hz 60 W Ambient temp range 15 C to 35 C 59 F to 95 F Enclosure mounting Bench or full 19 in rack Size 450 mm W x 178 mm H x 260 mm D 17 7 in x 7 in x 10 25 in Weight 5 5 kg 12 Ib Power connections Lake Shore temperature transmitters are powered by a 5 VDC supply if the transmitter card is ordered without a rack or plug in supply The voltage must be reg
9. s format only its electrical bus format only its electrical bus format only its physical shape and power physical shape and power physical shape and power Size 100 mm H x 160 mm D x 30 5 mm W 100 mm H x 160 mm D x 30 5 mm W 234 100 mm H x 160 mm D x 30 5 mm W Weight 0 25 kg 0 5 Ib 0 25 kg 0 5 Ib 0 25 kg 0 5 Ib 1 See Appendix F for sample calculations of typical sensor performance Lake Shore Cryotronics Inc t 614 891 2244 f 614 818 1600 e info lakeshore com www lakeshore com vo am Cryogenic Instruments 230 Series Temperature Transmitters Monitors 1 1 1 Number of outputs Output type Current source isolated from power source output or sensor can be grounded but not both all models Output range 4 mA to 20 mA or 0 mA to 20 mA for 0 V to 10 V with provided 500 0 0 02 25 ppm resistor all models Output compliance 10 V 500 Q max load 10 V 500 Q max load 10 V 500 Q max load Output temperature ranges Range 1 0 K to 20 K 0 K to 20 K 0K to 10K Range 2 0 K to 100 K 0 K to 100 K 0 K to 20 K Range 3 0 K to 200 K 0 K to 200 K 0 K to 100 K Range 4 0 K to 325 K 0 K to 325 K 0 K to 200 K Range 5 0 K to 475 K 0 K to 475 K 0 K to 300 K Range 6 0 K to 1000 K 0 K to 1000 K 75 K to 325 K 4 mA to 20 mA output Output resolution Current 1 22 UA 0 006 of full scale 1 22 pA 0 006 of full scale 1 22 UA 0 006 of full scale Temperature equivalence Range 1 1 5 mK Not used 0 8 mK Range 2 7
10. ulated to within 0 25 VDC Each transmitter draws up to 500 mA from the supply Ordering information Part number 231 231 115 231 230 231P 231P 115 231P 230 234 234 115 234 230 Accessories 2001 2002 2003 2308 12 2308 BP 8002 231 8002 231P 8002 234 CAL 231 CERT CAL 231P CERT CAL 234 CERT Description Transmitter card for use with silicon diode includes sensor output mating connector 106 739 500 ohm 0 02 PPM output resistor 103 626 calibration certificate and user s manual 231 transmitter with a 115 VAC 50 60 Hz wall plug in power supply 231 transmitter with 230 VAC wall plug in power supply Transmitter for use with platinum resistor includes sensor output mating connector 106 739 500 ohm 0 02 PPM output resistor 103 626 calibration certificate and user s manual 231P transmitter with 115 VAC 50 60 Hz wall plug in power supply 231P transmitter with 230 VAC wall plug in power supply Transmitter for use with carbon glass germanium and Cernox includes sensor output mating connector 106 739 500 ohm 0 02 PPM output resistor 103 626 calibration certificate and user s manual 234 transmitter with 115 VAC 50 60 Hz wall plug in power supply 234 transmitter with 230 VAC wall plug in power supply RJ11 4 m 14 ft modular serial cable RJ11 to DB25 adapter connects RJ11 cable to a 25 pin RS 232C serial port on rear of computer RJ11 to DB9 adapter connects
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