displacement transducers

Transcription

1 introduction Mach 1 Series Displacement Transducers 70 SM Series AC Miniature Displacement Transducers 71 MD Micro Series AC Miniature Displacement Transducers 72 DC Spring Return 73 DC Miniature Displacement Transducers From checking the notes issued by an automatic cash dispenser to controlling the active suspension on the Thrust SSC, Solartron's wide range of displacement transducers measure to laboratory standards in the real world conditions of vibration, shock and temperature. 74 Submersible Displacement Transducers 76 Standard AC & DC Long Stroke Displacement Transducers LVDT technology Measuring stroke from ±1mm to ±300mm Miniature transducers DC output (with external or internal electronic) Low cost version High temperature (200 C) version Submersible (100 Bar) version Custom design transducers

2 mach 1 series Stroke Length All Mach 1 transducers are designed to meet IP66, range of options 63 The Mach 1 family of and feature an international standard diameter has twelve different stroke lengths from ±1.5mm stainless steel body and carrier. to ±125mm (± 0.06 to ± 5 inch) AC or DC operation Stroke lengths ±1.5mm to ±125mm (± 0.06 to ± 5 inch) IP66 environmental rating AC and DC operation Free and guided core assemblies International standard diameter Stainless steel body and carrier High temperature (200 C) version Compatible with industry standards LVDT Transducers are designed for AC energisation with AC output proportional to distance from centre zero position. By using the in-line conditioning module (BICM) the energisation can be altered to DC with a DC output proportional to distance from centre zero position. The BICM can either be supplied pre-wired to the transducer or purchased separately. Captive or Unguided Core All models are available in either free or guided versions. Free: A large core to bore clearance allows the core to move freely within its assembly without contacting the body. The movement is frictionless so there is no wear and no need for precise alignment. Care must be taken in core and body mounting to ensure the two parts do not touch each other. Guided: Where more rigidity is needed, a core guide made of Oilite can be fitted. This option is essential if a return spring or universal joints are specified. Oilite is highly durable and does not normally require lubrication. Return Spring Guided transducers can be fitted with a spring to push the core to its fully extended position. This allows just the body to be clamped, leaving the core to press against a moving component without additional fixing. Universal Joints Varying geometry created by lever movements makes the universal joint a useful mechanism for mounting transducers. Only suitable for guided core option transducers, universal joints can be ordered separately and are retrofittable. Transducer and Core only Axial Cable Free Carrier Guided Carrier (and Core) Spring if fitted Guided Carrier and Ball Tip (and Core) the ins and outs of Mach 1 Displacement Transducers Guided Carrier and Universal Joint (and Core) High Temperature Versions Whereas standard transducers are designed to operate in ambient temperatures from -55 to +150 C, high temperature variants operate up to 200 C. Compatible with industry standards The 2.5kHz Mach 1 versions are plug in replacements for industry standards. Radial Cable (1.5 and 2.5 only) Axial Connector 5 DIN Plug BICM Universal Joint

3 64 specification Mechanical B 1.5 B 2.5 B 5.0 B 7.5 B 10 B 15 B 25 B 50 B 75 B 100 B 125 Linear stroke ±mm Linear stroke ±inch Standard cable length m 5kHz - 3m cable 2.5kHz - 0.3m flying leads Transducer weight (excluding lead) g Core weight g Right angle option yes yes no no no no no no no no no Materials Body - stainless steel Core - nickel/iron alloy Designed to meet IP66 IP66 IP66 IP66 IP66 IP66 IP66 IP66 IP66 IP66 IP66 All Mach 1 Series may be AC energised, or DC energised when using any of the optional conditioning modules 65 B 1.5 B 2.5 B 5 B 7.5 B 10 B 15 B 25 B 50 B 75 B 100 B 125 AC operation - 3Vrms 5kHz 2.5kHz 5kHz 2.5kHz 5kHz 2.5kHz 5kHz 2.5kHz 5kHz 2.5kHz 5kHz 2.5kHz 5kHz 2.5kHz 5kHz 2.5kHz 5kHz 2.5kHz 5kHz 2.5kHz 5kHz 2.5kHz Non-linearity % <0.25% of full range Sensitivity mv/v/mm ±5% Energising current ma/v Output impedance Ω total (secondary coils) Input/output phase shift ±2 (+leading, -lagging) Zero phase shift frequency khz Residual null Energising voltage range Energising frequency range khz* <0.5% full range output 1-10Vrms kHz Operating temperature (type A,B,K,L) -55 to 150 C Operating temperature (type C,D,M,N) -55 to 200 C Storage temperature (type A,B,K,L) -55 to 150 C Storage temperature (type C,D,M,N) -55 to 150 C Temperature coefficient, zero% FRO/ C Temperature coefficient, span FRO/ C * specifications will vary when nominal values are not used DC operation with BICM Nominal DC output at full scale Gain adjustment range Temperature coefficient of gain Zero offset adjustment 100% Temperature coefficient of zero Non-linearity % total stroke 0.3% Bandwidth Output current drive Output voltage ripple 0 to ±10Vdc 0 to ±11Vdc ±0.03% max %FS/ C ±0.025% max %FS/ C 250Hz typical 8mA max <14mV rms Output voltage change with power supply 0.01%/V Power requirements Voltage: ±13.8V to ± 18V dc Current: 8mA to 12mA typical Protection Reverse connection protected BICM operating temperature 0 to 70 C BICM storage temperature -55 to 70 C The BICM may be mounted up to 90 metres from the transducer and the output can drive up to 300 metres of cable is quoted at 3 metres between transducer and BICM <0.01 <0.03 <0.01 <0.02 <0.01 <0.01 <0.02 <0.02 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.02 <0.01 <0.01 <0.01 <0.02 <0.01 <0.02 <0.01 <0.05 <0.01 <0.02 <0.01 <0.03 Transducer Type 5kHz 2.5kHz A K 150 C rated Axial Cable outlet B L 150 C rated Radial Cable outlet (1.5 & 2.5 only) C M 200 C rated Axial Cable outlet D N 200 C rated Radial Cable outlet (1.5 & 2.5 only) Nominal Stroke in millimetres and (XXX.Xmm) Core/Carrier Type F W G R M I Free Core/Carrier - M4 x 0.7 thread Free Core/Carrier UNF thread Guided Core/Carrier - M4 x 0.7 thread Guided Core/Carrier UNF thread Ø 6.35mm Core M4 x 0.7 thread (no carrier) Ø 6.35mm Core 6-40 UNF thread (no carrier) / Connections <0.01 <0.01 <0.01 <0.03 Mach 1 ordering guide C L / X X 5 Core PFA Cable XX=Cable Length in metres (A-D only) L P / X X Lumberg Plug XX=Cable Length in metres (A-D only) A C / - - Axial Connector Mating part supplied (A-N inclusive) S T / m of 7/0.125 PTFE leads (K-N only) X X / Y Y BlCM fitted XX = cable length in metres between transducer and BlCM YY = cable in metres after BICM (A-D only) Please order Universal Joints, Springs and Ball Tips separately. Universal Joint Kit Consisting of two universal joints and mounting adaptor (Note: guided carrier to be specified) ø 6mm Part No ø 8mm Part No Ball Tip 3mm diameter carbide ball and adaptor to fit guided carrier Part No Spring Return Return springs may be fitted to the Mach 1.5 to 125 guided carrier versions Part No /B (stroke)

4 optimum series ac miniature LVDT 69 Small body diameter Good stroke to length ratio Large radial core to bore clearance Rugged construction High performance Optimum Series LVDT transducers comes in 3 different stroke lengths (±1.5mm, ±6.0mm, ±12.5mm) and are designed for linear positioning and measurement applications where infinite resolution, zero hysteresis and zero friction are required in a restricted space. Optimum s lightweight core with an addition of a Titanium carrier, helps to keep the moving mass lower than conventional LVDT transducers with similar stroke lengths. A good core to bore clearance makes assembly and alignment easy, whilst the epoxy-bonded construction and rugged design make the Optimum Series ideal for operation in either research or process control applications. The output from the transducer can be wired as differential or ratio metric output. Titanium core carriers, and guided carriers are available on request. DØ A E OP1.5 OP6.0 OP12.5 A B 9.512/ 9.512/ 9.512/ C 3.1/ / /3.2 D E F G Actual Size G F BØ CØ OP1.5 OP6.0 OP12.5 Mechanical Stroke ±mm Nominal calibrated Non-linearity, % of total stroke Increase stroke Non-linearity, % of total stroke Weight, g (body, including leads) Case Material 400 series stainless steel LVDT type Calibrated at 3V, 5kHz into 100KΩ Energising voltage 1 to 10V rms 1 to 10V rms 1 to 10V rms Energising frequency, khz 1 to 15 1 to 15 1 to 15 Calibration load, Ω 100k 100k 100k Primary resistance, Ω Primary inductance at 1kHz, mh (core at null) Primary impedance, Ω 1kHz (core at null) 2kHz kHz kHz kHz Total Secondary resistance, Ω Total Secondary inductance at 1kHz, mh, (core at null) Secondary impedance, Ω 1kHz (core at null) 2kHz kHz kHz kHz Input/Output Phase Shift at, º 1kHz kHz kHz kHz kHz Zero phase shift frequency, khz Residual voltage at zero (typical), <%full scale deflection 5 conductors of 300mm long 7/0.08mm PTFE Flying Leads connections Red and blue Primary energising White and green Output signal Yellow Secondary centre tap Red and white In-phase for inward displacement Performance Operating temperature -40ºC to +150ºC Sensitivity mv/v/mm typical 1kHz kHz kHz kHz kHz

5 sm series ac miniature md micro series ac miniature 71 Low cost Rugged construction Short body length Large radial clearance in bore Good performance SM transducers cover two standard linear ranges from ±1mm to ±3mm. They are designed for measuring displacement in applications where infinite resolution and repeatability are required in a very small size. The coils are wound on a PPS (40% GL) former, housed within a stainless steel case. Its epoxy bonded construction makes the device suitable for operation in wet or oily environments and in applications with high levels of mechanical stress. Usually, the core and push rod assembly moves friction-free within the sensor, although an alternative design is available where the core only is threaded at both ends. Recommended push rod materials are titanium. Other materials can be used, but with varying effects on the electrical characteristics. Eø SM1 SM3 A* B C D E F G H 1 1 J M2 M2 K 1 x 72 1 x 72 *at electrical zero unf thread alternative B Hø Cø Dø F G Threaded Core (alternative) F K Thread tapped at both ends Eø 6mm thread length A J Mechanical SM1 SM3 Stroke ±mm Nominal calibrated 1 3 Increase in output 2 4 Weight, g Body, including leads 6 8 Core assembly Threaded core Non-linearity, % of total stroke Materials Case 400 series stainless steel Push rod Titanium Winding configuration LVDT LVDT Energising voltage 1 to 10V rms 1 to 10V rms Energising frequency, khz 1 to 20 1 to 20 Calibration load, Ω 100k 100k Secondary resistance, Ω Primary impedance, Ω (Core at null) 1kHz kHz kHz kHz kHz Zero phase shift frequency, khz Residual voltage at zero (typical), <%full scale deflection conductors of 7/0.1mm connections Red and blue Primary energising White and green Output signal Yellow Secondary centre tap Red and white In-phase for inward displacement Performance Operating temperature -40 to +85ºC Temperature coefficient (typical) Zero (with stainless steel carrier 0.001% of 0.005% of and relative to mild steel) 1mm/ºC 3m/ºC Sensitivity mv/v/mm typical 1kHz kHz kHz kHz kHz Small diameter Right angle outlet available Low core weight Uses screened cable Spring relief A versatile range of linear for use in industrial environments. The small case diameter (6mm and 8mm) allows for easy installation in confined spaces, (a right angle output facility is available as a retrofit). The low core weight makes this range ideal for use in low inertia systems. Cross talk is prevented by the screened cable which also allows for multiple use of these transducers in close proximity. Note: Right angle outlet is not available with model M6D Mechanical M6D1 MD1 MD2.5 MD5.0 Linear measuring stroke ±mm (storage) -40 to +105ºC -40 to +105ºC -40 to +105ºC -40 to +105ºC (operation) -10 to +80ºC -10 to +80ºC -10 to +80ºC -10 to +80ºC Temperature coefficient Zero <0.01% full scale/ºc Sensitivity <0.01% full scale/ºc Non-linearity LVDT type 1.6ø 6h6ø 1.95ø Pin connections for standard Solartron Electronics ø 8h6ø 2.2ø <0.5% of reading Calibrated at 3V, 5kHz into 100kΩ Current 9mA 5.4mA 6mA 3mA Input/Output phase shift 12º 8º 8º 5º Zero phase shift frequency 13kHz 10kHz 13kHz 10kHz Sensitivity typical 269mV/V/mm 210mV/V/mm 150mV/V/mm 105mV/V/mm 15.7 Quadrature Resistor To minimize residual voltage at null, supplied where necessary and should be fitted as follows: ø 8h6ø 2.2ø ø 8h6ø 2.2ø LVDT: Between Yellow and White or Yellow and Green depending on phase. (See separate calibration sheet for details) Cable type: LVDT: 2 meter PVC insulated 6 core 14/0.07mm screened cable

6 dc spring return DC-DC Operation Precision Linear bearing Sealed with viton gaiter Removeable tip ø19 ø3.5 DG/1.0 & DG/ ø19 ø3.5 DG/5.0 dc miniature High output Two types Range to 10mm Infinite resolution M2x6 6 3ø 10 A 1ø B 1.9ø 19ø 3.5ø CABLE CORE ASSEMBLY DELRIN BEARINGS FITTED TO DFg SERIES ONLY 73 Robust construction Spring return NB These transducers are from an old product range. They are available primarily as service replacements where form, fit and function for an existing product is essential. 18 ø8h6 Dimensions to tips shown at electrical zero 23.5 ø8h6 Excellent repeatability Type DF has a friction-free core and is capable of measuring the smallest movement detectable by the associated instrumentation. Type DFg has a free guided core incorporating Delrin bearings. DF1 DF2.5 DF5 DFg1 DFg2.5 DFg5 A* B *at electrical zero DG/1.0 & DG/2.5 DG/5.0 Calibrated range ±1mm & ±2.5mm ±5mm Mechanical Outward travel from zero 2.65mm ± mm ±0.05 Inward travel from zero 3.35mm ± mm ±0.2 Spring rate 13g/mm 10g/mm Spring force at electrical zero 90g 70g Gaiter material Viton Viton Probe tip ø3mm ø3mm Winding configuration LVDT LVDT 10V dc into 20kΩ 10V dc into 20kΩ Energising voltage range 10-24V dc stabillised 10-24V dc stabillised Energising current 10V dc 10V dc Sensitivity 10V 10V Output ripple <1%pk-pk of F.S.output <1%pk-pk of F.S.output Non- linearity <0.3% of full range output <0.3% of full range output Repeatabillity <0.15µm <0.15µm -20 to +80ºC -20 to +80ºC Temperature coefficient Zero Typ 0.01%F.S./ºC Typ 0.01%F.S./ºC Temperature coefficient Sensitivity Typ 0.02%F.S./ºC Typ 0.02%F.S./ºC Dynamic frequency for -3dB attenuation 75Hz 50Hz Responce time constant Typ 3ms Typ 5ms connections Positive energising Red Red Negative energising Blue Blue Signal (+ve output for inward displacement) White White Single earth Green Green Free core type DF1 DF2.5 DF5 Guided core type DFg1 DFg2.5 DFg5 Mechanical Linear stroke, ±mm Weight, g Body, including leads Core assembly Core (guided) Sensitivity at 10V dc (mv/mm) Energising current (at 10V) 10mA 10mA 13mA Input voltage range 10 to 24V dc Output ripple <1% fsd Responce time constant (ms) Frequency responce (-3dB) 50Hz 50Hz 75Hz -20 to +80ºC Temperature coefficient Zero <0.02%F.S./ºC <0.01%F.S./ºC <0.01%F.S./ºC Sensitivity <0.25%F.S./ºC <0.025%F.S./ºC <0.025%F.S./ºC Non-linearity (% range) Calibration connections Positive dc supply Negative dc supply Signal (+ve output for inward displacement) Single earth Not connected 3m PVC insulated 6 core 19/0.07mm screened cable is provided with a transducer output impedance of 2.4kΩ into a calibration load of 20kΩ at 20ºC. Variations of these parameters will result in changes of performance Red Blue White Green Yellow All types incorporate a linear variable differential transformer (LVDT) as the measuring source together with oscillator, demodulator and filter providing a self-contained unit accepting a DC input and providing a DC output relative to armature position. High linearity and low mass of moving parts is ideally suited to applications in civil, mechanical, chemical and production engineering. Also, when mounted in a suitable load-sensitive member such as a proof ring or diaphragm, they can provide load or pressure measurement.

7 submersible AC and DC-DC types All welded construction Mineral insulated cable Ranges to 50mm Good linearity Sealed to 100Bar (1,500psi) LVDT configuration SAF and SDF series transducers provide reliable, high accuracy measurements in pressurized environments up to 100bar (1,500psi). They are ideally suited for use on oil rigs, soil testing, field trials and other similar hostile environments. Encased in electron beam welded 300 series stainless steel and terminated with stainless steel sheathed mineral insulated (mi) cable, they can be submerged in any compatible liquid. Three linear ranges are available up to ±50mm. Type SAF is for AC operation and type SDF incorporate oscillator/demodulator for DC-DC operation. 20 M4 A B ø4 SAF15 SAF25 SAF50 SACR SDF15 SDF25 SDF50 SDCR A* B *at electrical zero ø19 Stainless steel sheathed mineral insulated cable ø3 M10x PVC leads Encapsulation AC free armature type SAF15 SAF25 SAF50 AC sprung armature type SACR DC free armature type SDF15 SDF25 SDF50 DC sprung armature type SDCR - - Mechanical Linear measuring stroke, ±mm Weight, g Body, including leads Armature assembly Armature (spring) Spring rate Force at electrical zero, g Operating pressure range 100Bar (1500 psi) AC free armature type SAF15 SAF25 SAF50 AC sprung armature type SACR Winding configuration LVDT LVDT LVDT Sensitivity, mv/v/mm (typical) Energising current, ma Input/Output phase shift, º Zero phase shift, khz Energising voltage Energising frequency Calibration load Residual voltage at zero 1 to 10V rms 5kHz 100kΩ >0.25% fsd -40 to +100ºC Temperature coefficient % total stroke Zero <0.005%/ºC Sensitivity % <0.01%/ºC DC free armature type SDF15 SDF25 SDF50 DC sprung armature type SDCR - - Sensitivity, mv/v/mm at 10V dc energising Energising current at 10V dc (ma) Input voltage range 9 to 24V Output ripple <1% full scale deflection Response time constant 0.4 ms Frequency response 600Hz for -3dB -20 to +80ºC Temperature coefficient % total measuring stroke Zero <0.01%/ºC Sensitivity <0.03%/ºC Non-linearity 0.3 Calibration DC Calibration AC connections Red & Blue White Green AC only Yellow Red & White DC only 1m of 3mmø stainless sheathed mi cable plus 3m PVC leads is provided with a transducer output impedance of 2kΩ into a calibration load of 20kΩ at 20ºC. Variations of these parameters will result in changes of performance The specification provided is with a supply of 5V rms 5kHz and a calibration load of 100kΩ at 20ºC. Variations of these parameters will result in changes of performance Primary Energising Secondary Signal Secondary OV Secondary centre tap (dc not connected) In phase for inward displacement Positive output on white lead with respect to green for inward displacement 75

8 standard ac & dc long stroke ø22.3 C G A ød ød AC15 AC25 AC50 AC100 AC150 AC250 AC300 ACR15 ACR25 ACR50 ACR100 ACR DC15 DC25 DC50 DC100 DC150 DC250 DC300 DCR15 DCR25 DCR50 DCR100 DCR A* B C D E F G M3 M4 M4 M5 M5 M5 M5 H *at electrical zero B øe A+B-C+84.5 øf 35 H AC captive armature type AC15 AC25 AC50 AC100 AC150 AC250 AC300 AC sprung armature type ACR15 ACR25 ACR50 ACR100 ACR DC captive armature type DC15 DC25 DC50 DC100 DC150 DC250 DC300 DC sprung armature type DCR15 DCR25 DCR50 DCR100 DCR Linear measuring stroke, ±mm Mechanical: AC & DC series Max stroke, ±mm Weight, g Body, including leads Armature assembly Spring rate Force at electrical zero, in g ACR : AC series Winding configuration LVDT LVDT LVDT LVDT LVDT LVDT LVDT Sensitivity, mv/v/mm (typical) Energising current, ma Output impedance, Ω Input/Output phase shift, º Zero phase shift, khz Energising voltage Energising frequency 1 to 10V rms 5kHz Residual voltage at zero >0.5% -40 to +100ºC Temperature coefficient % measuring stroke Zero <0.005%/ºC Sensitivity % per ºC <0.01%/ºC Calibration 3m PVC insulated 5 core 19/0.07mm screened cabel. 100 to 300: 28/0.07mm screened cable The specification provided is with a supply of 5V rms 5kHz and a calibration load of 100kΩ at 20ºC. Variations of these parameters will result in changes of performance connections Red & blue Primary Energising White Secondary Signal Green Secondary OV Yellow Secondary centre tap (dc not connected) Red & white In phase for inward displacement : DC series Winding configuration LVDT LVDT LVDT LVDT LVDT LVDT LVDT Sensitivity, mv/v/mm at 10V dc (typical) Energising current at 10V, ma Input voltage range, V 9 to 24 9 to 24 9 to 24 9 to 15 9 to15 9 to 15 9 to 15 Output ripple <1% full scale deflection Response time constant 0.4 ms up to 50mm Frequency response For transducers up to ±50mm: 3dB attenuation at 100Hz, 20dB/decade above 100Hz -30ºC to +80ºC Temperature coefficient % total stroke Zero <0.005%/ºC Sensitivity % per ºC <0.015%/ºC Non-linearity Calibration connections Red & blue White Green Red & white 0.3% is available 3m pvc insulated 5 core 14/0.07mm screened cable. 100 to 300: 14/0.1mm screened cable is provided with a transducer output impedance of 2kΩ into a calibration load of 20kΩ at 20ºC. Variations of these parameters will result in changes of performance Primary Energising Secondary Signal Secondary OV +ve output on white lead with respect to green for inward displacement