Model 480 Datasheet
Contents
1. display During normal operation the display is used to report field readings and give results of other features such as max min or relative When setting instrument parameters the display gives the operator meaningful prompts and feedback to simplify operation The operator can also control display brightness Following are three examples of the various display configurations Normal Reading the default mode with the display of the live DC flux reading DC Positive and Negative Peak On the display shows both the positive and negative DC peak readings Alarm On the alarm gives an audible and visual indication of when the flux value is selectively outside or inside a user specified range www lakeshore com Lake Shore Cryotronics Inc 614 891 2244 Helmholtz and Search Coils Coils and probes wound by the user or from other manufacturers can be easily used with the Model 480 The Model 480 allows the user to save parameters for up to 10 existing coils probes and quickly switch between them Lake Shore also offers several sensing coils and probe assemblies for use with the Model 480 that have several conveniences They are factory calibrated for accuracy and interchangeability Calibration data is loaded into memory in the probe connector so it does not have to be entered by the user Special coil assemblies are also available and can be designed to meet customer specifications FH Series Helmholtz Coils Lake Shor2. and analog outputs can be used for automation without a computer interface Magnetizing The magnetizing process places unique demands on all associated electronics The Model 480 responds with a very fast peak capture that can keep up with the fastest magnetizing pulses Both a positive and negative peak can be captured from the same pulse The input of the Model 480 is protected against the high voltages present during magnetizing www lakeshore com Lake Shore Cryotronics Inc Model 480 Fluxmeter LakeShore 614 891 2244 Model 480 Fluxmeter 480 Fluxmeter Peak Britt Reading Adjust Reset es Materials Analysis High resolution and low drift define a fluxmeter s role in analytical measurement The high resolution of the Model 480 is reinforced by a low noise floor A configurable filter helps keep the readings quiet Automatic and manual drift adjustment modes help optimize the integrators low drift characteristics The IEEE 488 and serial computer interfaces included with the 480 allow automated data taking AC Magnetic Fields Sensing coils are sensitive to AC magnetic fields but many conventional integrating fluxmeters can not measure AC fields The Model 480 has an AC mode that enables it to measure fields over a wide frequency range using simple sensing coils Applications are limited to field volumes as large as or larger than the coil but for some it is an inexpensive way to make low drift
3. 18 mm D 8 5 in x 3 5 in x 12 5 in half rack Weight 3 kg 6 6 Ib Approval CE mark Ordering Information Part number Description 480 Model 480 fluxmeter Specify line power option VAC 100 100 VAC includes U S power cord VAC 120 120 VAC includes U S power cord VAC 220 220 VAC includes universal Europe power cord VAC 240 240 VAC includes universal Europe power cord VAC 120 ALL 120 VAC includes U S and universal Europe power cords and all fuses Accessories included 106 739 Two 8 pin terminal block mating connectors MAN 480 Model 480 user manual Accessories available 4005 1 m 3 3 ft long IEEE 488 GPIB computer interface cable assembly includes extender required for simultaneous use of IEEE cable and auxiliary terminal block Instrument recalibration with certificate Instrument recalibration with certificate and data Calibration data for a new Model 480 Rack mount kit for mounting one Model 480 in 483 mm 19 in rack Rack mount hit for mounting two Model 480s in 483 mm 19 in rack CAL 480 CERT CAL 480 DATA CAL N8 DATA RM RM 2 Coils see pages 46 and 47 for more information FNT 6R04 100 100 cm search coil FNT 5P04 30 30 cm search coil FH 2 5 Helmholtz coil 64 mm 2 5 in ID FH 6 Helmholtz coil 152 mm 6 in ID FH 12 Helmholtz coil 305 mm 12 in ID FCBL 6 User programmable cable with PROM 1 5 m 5 ft long All specifications are subject to change without notice Custom probes coils fixtur
4. 53 4 digit DC resolution 1 part out of 300 000 Automatic drift compensation mM Very fast peak capture mM AC frequency response to 50 kHz mM JEEE 488 and serial interfaces a Storage of parameters for up to 10 existing coils Product Description An advanced tool designed primarily for use in industrial and measurement systems settings the Model 480 fluxmeter measures total flux from which B flux density and H magnetic field strength can be determined The Model 480 is valuable for magnetizing manual and automated magnet testing and sorting and as the main component in BH loop or hysteresis measurement system applications The Model 480 is compatible with most sensing coils and fixtures Manual Magnet Testing A bright display and fast update rate make the Model 480 ideal for manual magnet sorting and testing The instrument s low drift improves productivity with fewer adjustments Remote terminals allow for foot pedal reading reset to keep hands on the work not the instrument Configurable alarms give an audible signal or relay closure to signify pass fail Automated Magnet Testing In automated testing time is money The Model 480 has many features to enhance throughput The instrument has a fast update rate and fast settling time It recovers quickly from reading reset to start a new reading cycle The IEEE 488 and serial computer interfaces included with the 480 can be used to control most instrument functions Relays
5. AC field measurements Drift Adjustment Adjusting or nulling the drift of an analog integrator wastes time it can be the only unpleasant part of using an integrating fluxmeter Lake Shore innovation brings some relief The Model 480 has a built in drift algorithm that continually adjusts drift when the instrument and coil are idle It is ready when you are to make precision low drift measurements The adjustment algorithm has no effect during flux integration Manual drift adjustment is also available fax 614 818 1600 e mail info lakeshore com am Model 480 Fluxmeter Model 480 Rear Panel Line input assembly Serial I O interface IEEE 488 interface Terminal block for relays and analog signals Coil input for user coils QO 80086 Probe input for Ce Lake Shore probes 4 vonga 0002 OSATEN 02MIN SoOGHr 4OVAMAK ZEOTHN O 25AT 250V MEOT EEE 488 INTERFACE SH AHi TE La SRi ALi PPO Got DTO OO Ei COIL INPUT F PROBE INPUT D O CAUTION POWER OFF TO MATE PROBE The Model 480 terminal block has connections for external reset With this feature a foot pedal or programmable logic controller PLC can be used to start a new measurement cycle The external reset is TTL compatible and a logic low will activate a reset The signal is internally pulled up to allow operation with a simple switch closure between pins 12 and 13 Display The Model 480 has a 2 line by 20 character vacuum fluorescent
6. G T Wbcm A Units multipliers p n u m k M G Annunciators AC AC input signal DC DC input signal A positive and negative peaks R remote operation alarm on Keypad 21 full travel keys www lakeshore com Lake Shore Cryotronics Inc 614 891 2244 Model 480 Fluxmeter En E Interfaces IEEE 488 2 capabilities SH1 AH1 T5 L4 SR1 RL1 PPO DC1 DTO CO E1 Serial interface RS 232C electrical DA 9 connector 9600 baud External reset type Contact closure Alarms Number 2 Settings High and low setpoint Inside Outside Audible Actuators Display annunciator beeper relays Relays Number 3 Contacts Normally open NO normally closed NC and common C Contact rating 30 VDC at2A Operation Follow high low alarms with third relay indicating no alarm state can be operated manually Connector Detachable terminal block Monitor analog output Scale 3 V full scale on Vs range Accuracy 1 of reading 10 mV DC to 10 kHz 5 of reading 10 mV 10 kHz to 50 kHz Minimum load resistance 1 kQ Connector Detachable terminal block Corrected analog output Scale User selected Range 10 V Resolution 0 3 mV Accuracy 2 5 mV Minimum load resistance 1 KQ Connector Detachable terminal block General Ambient temperature 15 C to 35 C at rated accuracy 5 C to 40 C with reduced accuracy Power requirement 100 120 220 240 VAC 5 10 50 or 60 Hz 20 VA Size 216 mm W x 89 mm H x 3
7. e coils can be used with the Model 480 fluxmeter as well as with other fluxmeters When used with a Model 480 fluxmeter calibration and set up data are automatically loaded into the instrument These probes and coils are accurately calibrated using field standards maintained at Lake Shore Most standards are traceable to physical Standards such as a coil or probe of carefully controlled dimensions or in some cases to proton resonance The coil constants are measured on the basis of the field generated by a current through the coil See pages 46 and 47 for more information about available Helmholtz and search coils fax 614 818 1600 e mail info lakeshore com Model 480 Specifications Measurement Number of inputs 1 Input type 2 lead ground referenced Input resistance 100 KQ or 10 KO Maximum operating input voltage 60 V Absolute maximum input voltage 100 V WARNING voltages between 60 V and 100 V will not damage the instrument but could result in personal injury or damage to other instruments Update rate 5 rdg s display 30 rdg s IEEE 488 30 rdg s serial DC DC resolution To 5 digits DC integrator capacitance 1 uF nominal DC input resistance DC ranges DC resolution DC accuracy Offset 10 uVs DC integrator drift gain 0 25 of reading lt 10 Vs s maximum rate of change DC minimum d dt 20 uVs min DC maximum d dt 60 Vs s DC integrator drift 1 uVs min 0 0004 fu
8. es available consult Lake Shore fax 614 818 1600 e mail info lakeshore com
9. ll scale min on 300 mVs range 100 kQ input resistance constant temperature environment DC Peak DC peak resolution 4 digits DC peak integrator capacitance 1 uF nominal 100kQ 100kA 10 KQ 10 KQ 300 mVs DC peak input resistance DC peak ranges DC peak resolution DC peak minimum reading DC peak accuracy Offset 100 uVs DC integrator drift gain 5 of reading lt 10 Vs s maximum rate of change DC peak maximum d dt 60 Vs s DC peak update rate Reduces update rate to 1 4 normal AC AC resolution 4 digits reduced to 3 digits on the 30 uVs range AC integrator capacitance 0 1 uF nominal AC input resistance 100 kO 100 kQ 100 kQ 100 kQ AC ranges 300 uVs AC resolution AC minimum reading AC frequency response 2 Hz to 50 kHz AC accuracy 1 rdg 10 uVs 10 Hz to 10 kHz sinusoidal 5 rdg 10 uVs 2 Hz to 50 kHz sinusoidal AC integrator drift NA AC Peak AC peak resolution 3 digits AC peak integrator capacitance 0 1 uF nominal AC input resistance 100 kO 100 KQO 100 KO AC peak ranges 300 uVs AC peak resolution AC minimum reading AC peak accuracy 5 rdg 10 Vs 10 Hz to 10 kHz sinusoidal 10 rdg 10 uVs 2 Hz to 50 kHz sinusoidal AC peak update rate Reduces update rate to 1 4 normal Front Panel Display type 2 line x 20 character vacuum fluorescent display Display resolution To 5 digits Display update rate 5 rdg s Display units Vs MxN WbN Vs Mx Wb
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