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Содержание CYTX231 Series

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Страница 3: ...r Lead Measurements 2 3 2 3 2 Connecting Leads To The Sensor 2 3 2 3 3 Sensor Mounting 2 3 2 3 4 Measurement Errors Due To AC Noise 2 5 2 4 Sensor Curve Definition 2 6 2 5 Power Connections 2 7 3 OPER...

Страница 4: ...3 Multiple Unit Case Physical Dimensions 1 8 2 1 Typical Wall Plug In Power Supply 2 8 3 1 Model CYTX231 DIP Switch S1 3 1 4 1 Front Panel Connectors J2 J3 Details 4 2 4 2 VMEbus Connector J1 Details...

Страница 5: ...es a Model CYTX231SD 115 single space enclosure or a Model CYTX SD 115 rackmount case that holds up to 12 units The Model CYTX Enclosure 12 Temperature Transmitter sends temperature data from its posi...

Страница 6: ...to convert output to a voltage reading scaled from zero A 500 0 02 precision resistor is provided for this purpose This resistor produces the maximum full scale output of 10 V A single 5 VDC supply p...

Страница 7: ...mple Sensor CY7 SD7 Temperature Range 1 4 K 325 K Standard Curve Curve 10 Typical Sensor Sensitivity 30 mV K at 4 2 K 1 9 mV K at 77 35 K 2 4 mV K at 300 K Measurement Resolution Sensor Units 76 3 V T...

Страница 8: ...ty 0 19 K 30 K 0 42 K 77 35 K 0 39 K 300 K 0 34 K typical up to 800 K Measurement Resolution Sensor Units 4 8 m Temp Equivalence 22 mK at 30 K 11 mK at 77 35 K 13 mK at 300 K 14 mK typical up to 800 K...

Страница 9: ...Temp Equivalence 0 20 K 2 5 mK 0 325 K 41 mK 0 100 K 12 5 mK 0 475 K 59 mK 0 200 K 25 mK 0 1000 K 125 mK Output temperature coefficient Current 0 0055 of output current per C Temp Equivalence 0 20 K...

Страница 10: ...only its physical shape and power supply Note Electronic temperature accuracy in a given temperature range is the sum of temperature accuracies of input and output Sensor calibration errors are not in...

Страница 11: ...below Refer to Paragraph 2 5 for further information on the built in power supply CAUTION The Model CYTX Enclosure 12 bus is designed only to power multiple Model CYTX231s Do not use with standard VME...

Страница 12: ...Omega Model CYTX231 User s Manual 1 8 Introduction 17 625 inches 44 8 cm FRONT VIEW 10 25 inches 26 cm 7 0 inches 17 8 cm SIDE VIEW TOP VIEW Figure 1 3 Typical Multiple Unit Case Physical Dimensions...

Страница 13: ...the carrier and insurance company and notify Omega Notify Omega immediately of any missing parts Omega cannot be responsible for any missing parts unless notified within 60 days of shipment See the s...

Страница 14: ...ads can be critical in a cryogenic environment wire of small diameter and significant resistance per foot is preferred to minimize this heat flow Consequently a voltage drop within the leads may exist...

Страница 15: ...To minimize heat flow through the leads select leads of small diameter and low thermal conductivity Phosphor bronze or Manganin wire is commonly used in sizes 32 or 36 AWG These wires have a fairly lo...

Страница 16: ...ng stress on the device leads and allow for thermal contractions that occur during cooling which could fracture a solder joint or lead if installed under tension at room temperature For temporary moun...

Страница 17: ...ed digital noise is suspected digital circuits or interfaces use a 0 1 to 1 microfarad capacitor In either case if measured DC voltage increases there is induced noise in the measurement system 2 Meas...

Страница 18: ...on based on both performance and expense Forward Voltage V f volts 1 8 1 6 1 4 1 2 1 0 0 8 0 6 0 4 0 2 0 20 60 200 300 Temperature K kelvin Standard Curve 10 10 0 20 30 40 50 60 Average Slope 26 mV K...

Страница 19: ...enter pin A wall plug in power supply Model 5V DC is used with the Model CYTX231 Power Supply input is based on local power requirements as follows MODEL INPUT POWER 2007 10 2007 12 2007 22 2007 24 10...

Страница 20: ...lation 6 foot Cord 2 25 in 5 72 cm wide 2 0 in 5 1 cm deep AC DC REGULATED POWER SUPPLY INPUT AC 120V 60Hz 12W OUTPUT DC 5V 600mA CAUTION CAUTION Indoor Use Only Indoor Use Only 3 125 in 7 94 cm high...

Страница 21: ...CalCurve option if present or closed for the DT 670 Curve For the Model CYTX 231P set the CURVE switch to open for the platinum curve or closed for the CalCurve option Unless CalCurve is specified uni...

Страница 22: ...TURE CONVERSION The output current or voltage is directly proportional to the temperature reading For the 4 20 mA output the following formula converts output current to temperature T A B x IOUT where...

Страница 23: ...SHIELD are not connected to each other Due to extensive protection circuitry installed in Model CYTX231 all the above problems eventually cause the 0 5 A slow blow fuse to burn out After correction re...

Страница 24: ...er than 5 VDC then sensor connections may be open If sensor voltage polarity is negative SENS V and SENS V leads are reversed With the sensor at operating temperature the voltage readings should corre...

Страница 25: ...4 3 1 reference calibration in Paragraph 4 3 2 and calibration in Paragraph 4 3 3 See Figure 4 3 for the Model CYTX231 PCB layout Allow 5 minutes warm up before calibration 4 3 1 Required Test Equipme...

Страница 26: ...Perform this reference calibration before output calibration 1 Connect DVM negative lead to Model CYTX231 reference ground REF GND on TP2 and positive lead to VREF on TP3 2 Adjust trimpot R33 VREF TR...

Страница 27: ...out 10 V 6 Use jumper wire 3 to short V to V Leave Jumpers 1 and 2 in place 7 DVM reading should drop to about 0 V Allow 10 seconds for reading to stabilize 8 Adjust trimpot R25 OUTPUT OFFSET until DV...

Страница 28: ...Omega Model CYTX231 User s Manual 4 6 Service This Page Intentionally Left Blank...

Страница 29: ...ilt in power supply for up to 12 Model CYTX231 s 5 3 ACCESSORIES MODEL DESCRIPTION OF ACCESSORY M3496 Model CYTX231 User s Manual 106 739 Input Terminal Mating Connector 2007 10 Wall Plug in Power Sup...

Страница 30: ...6 Quad Lead Cryogenic Wire Phosphor bronze wire flat 36 AWG 0 127 mm 0 005 inch diameter Any quality dual shield twisted pair wire for dewar to Model CYTX231 connector Insert 20 100 or 500 feet 5 5 SE...

Страница 31: ...4703 0 21870 0 32600 0 49026 0 59422 0 67357 0 75123 0 81604 0 86861 0 90948 0 94910 0 98709 1 01423 1 04026 1 06998 1 09543 1 10612 1 11272 1 11566 1 11945 1 12592 1 14082 1 18219 1 27532 1 33400 1 4...

Страница 32: ...dR dT K K 14 0 20 0 30 0 40 0 50 0 70 0 100 0 150 0 200 0 300 0 400 0 500 0 600 0 700 0 800 0 900 0 1000 0 1 797 2 147 3 508 5 938 9 228 17 128 29 987 50 815 71 073 110 452 148 616 185 035 221 535 256...

Страница 33: ...ure scale that registers the freezing point of water as 0 C and the boiling point as 100 C under normal atmospheric pressure Celsius degrees are purely derived units calculated from the Kelvin Thermod...

Страница 34: ...rd cited in 29 CFR 1910 1200 requiring communication of risks from hazardous substances to workers in regulated facilities hertz Hz A unit of frequency equal to one cycle per second international syst...

Страница 35: ...c units are the meter kilogram and second and the ampere is a derived unit defined by assigning the magnitude 4 x 10 7 to the rationalized magnetic constant sometimes called the permeability of space...

Страница 36: ...Absolute zero kelvin Celsius Fahrenheit 0 K 273 15 K 373 15 K 273 15 C 0 C 100 C 459 67 F 32 F 212 F Triple point of water 273 16 K To convert kelvin to Celsius subtract 273 15 To convert Celsius to...

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