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ASTECH TX31D/1/IFM Operating Instructions Manual

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ASTECH ELECTRONICS LIMITED

OPERATING INSTRUCTIONS

SINGLE CHANNEL 'D' RANGE
ROTARY/SHORT RANGE TELEMETRY EQUIPMENT
©
Astech Electronics Ltd
Reproduction of any written material or illustration in this publication
in any form or for any purpose is expressly forbidden
unless the prior consent of Astech Electronics Limited has been given in writing
Forge Industrial Estate, BINSTED, Alton, Hampshire GU34 4PF, England.
Tel: 01420 22689, Fax: 01420 22636
Via Paolo Uccello 4 - 20148 Milano
Tel +39 02 48 009 757 Fax +39 02 48 002 070
info@dspmindustria.it www.dspmindustria.it

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  • Page 1: Operating Instructions

    Reproduction of any written material or illustration in this publication in any form or for any purpose is expressly forbidden unless the prior consent of Astech Electronics Limited has been given in writing Forge Industrial Estate, BINSTED, Alton, Hampshire GU34 4PF, England.
  • Page 2 TM Page 2...

  • Page 3: Table Of Contents

    ASTECH ROTARY TELEMETRY SYSTEMS - GENERAL DESCRIPTION LIST OF SYSTEM ITEMS & SERIAL NUMBERS Transmitters Transmitter TX31D/1/IFM 3.1.1 TX31D/1/IFM Input Connections & Scaling 3.1.2 TX31D/1/IFM Calculation of Shunt Calibration Resistor "Rcal" 3.1.3 TX31D/1/IFM Mounting and Cover Plate 3.1.4 TX31D/1/IFM Specifications Transmitter TX34/1/IFM 3.2.1 TX34D/1/IFM Input Connections &...
  • Page 4 4.3.11 Tachometer Settings Menu 4.3.11.1 Set the Number of Tachometer Flags 4.3.11.2 Set the Full Scale RPM 4.3.12 Decoder Settings Menu 4.3.12.1 Set the transmitter type 4.3.12.2 Set the Output Calibration Mode 4.3.12.3 Set the OLED Display Brightness INDUCTIVE POWER SUPPLY & TRANSMITTER INSTALLATION Inductive Head IH2 or IH2/L with shaft mounted power pickup loop 5.1.1 Inductive Head IH2 or IH2/L with Power Pickup Loop in Split-Ring Assembly "TX.MTGS"...

  • Page 5: Astech Rotary Telemetry Systems - General Description

    ASTECH ROTARY TELEMETRY SYSTEMS - GENERAL DESCRIPTION Astech Rotary Telemetry Systems enable the measurement of physical quantities – torque, strain, temperature or vibration for example, on rotating or moving components, by means of non-contacting radial data transmission. In addition to providing a wire-free method of transferring the measurement data to a...

  • Page 6: List Of System Items & Serial Numbers

    LIST OF SYSTEM ITEMS & SERIAL NUMBERS (Example) Transmitter Type TX34D/1/IFM (1 Strain Input Channel and Supply V Monitor Channel) plus Screening Cover & CAK Mounting Baseplate S/No. 3203 CAK Shaft Mounting Kit Inductive Power Supply/Signal Pickup Head Interface Module IH2 S/No. 3205 Mounting Bracket for Inductive Head &...

  • Page 7: Transmitters

    TRANSMITTERS TRANSMITTER TX31D/1/IFM The single channel (plus power supply monitor channel) TX31D/1/IFM transmitter is a compact, low profile design, used when a minimum diameter for the shaft mounted hardware is required. The lightweight machined aluminium housing is drilled to accept a screening cover and slotted base-plate fixture (for use with the shaft clamp assembly kit CAK). Power...

  • Page 8: Tx31D/1/Ifm Input Connections & Scaling

    3.1.1 TX31D/1/IFM Input Connections & Scaling Input sensitivity of the transmitter input is set by a resistor (Rg), which is soldered across pins P6 and P7. This sets the gain of the input amplifier such that its output at (at full scale signal input) uses ±41.5% of the total A/D convertor range.

  • Page 9: Tx31D/1/Ifm Calculation Of Shunt Calibration Resistor "Rcal

    TX31D/1/IFM Mounting and Cover Plate The TX31D/1/IFM can be mounted on a plate surface by using M3 bolts through the 4 corner holes or it may be fixed onto a shaft using the strapping attachment plate included in the CAK kit.

  • Page 10: Tx31D/1/Ifm Specifications

    3.1.4 TX31D/1/IFM Specifications Input: 1 channel full bridge strain gauge input. "Instrumentation Amp" input, operating at 2.048V common-mode (set by strain gauge bridge common-mode). Series and common-mode input resistance 20 M ohms. Input bias current 1 nA. Input sensitivity set by single user accessible resistor. Range 0.1 mV to 500 mV full scale.

  • Page 11: Transmitter Tx34/1/Ifm

    TRANSMITTER TX34/1/IFM The single channel (plus power supply monitor and internal temperature channels) TX34D/1/IFM transmitter is a compact, low profile design, used when a minimum diameter for the shaft mounted hardware is required. The lightweight machined aluminium housing is drilled to accept a screening cover and slotted base-plate fixture (for use with the shaft clamp assembly kit CAK).

  • Page 12: Tx34D/1/Ifm Input Connections & Scaling

    TX34D/1/IFM Mounting and Cover Plate The TX34D/1/IFM uses the TX31D/1/IFM mounting system as they share the same housing. The TX34D/1/IFM can be mounted on a plate surface by using M3 bolts through the 4 corner holes or it may be fixed onto a shaft using the strapping attachment plate included in the CAK kit.

  • Page 13: Tx34D/1/Ifm Specifications

    3.2.4 TX34D/1/IFM Specifications Input: 1 channel full bridge strain gauge input. "Instrumentation Amp" input, operating at 2.048V common-mode (set by strain gauge bridge common-mode). Series and common-mode input resistance 20 M ohms. Input bias current 1 nA. Input sensitivity set by remote programming using the RE3D. Range 0.1 mV to 500 mV full scale. Bridge Excitation Supply: 4.096VDC ±1% over full operating temperature range.

  • Page 14: Transmitter Tx35/1/Ifm

    TRANSMITTER TX35/1/IFM The single channel (plus power supply monitor and internal temperature channels) TX35D/1/IFM transmitter is a miniature, low profile design, used when a minimum diameter for the shaft mounted hardware is required. The transmitter is encapsulated in a high temperature epoxy resin. The power supply is normally by inductive coupling into a single turn pickup loop, either wound around the shaft periphery (and separated from the shaft by an insulating standoff layer), or located within a groove machined into the split-ring assembly O.D.

  • Page 15: Tx35D/1/Ifm Input Connections & Scaling

    3.3.1 TX35D/1/IFM Input Connections & Scaling Input sensitivity of the transmitter input is set by a sending a command from the RE3D demodulator unit. This sets the gain of the input amplifier as required by sending a command over the inductive power supply. Signal source offsets can also be removed by the programmable amplifier, this again is controlled by the RE3D.

  • Page 16: Demodulator Re3D

    DEMODULATOR RE3D The RE3D Demodulator is a highly sophisticated unit that can output digital and analogue data collected from a variety of transmitter types. The built in microcontrollers allow onboard computation of strain and power directly from mechanical parameters entered into the unit from the front panel or using a PC/laptop via a USB interface. For compatible transmitters, eg TX34D/TX35D, the RE3D can also be used to set the gain, offset and calibration.
  • Page 17 Main input fuse 2A Slow Blow Connect to inductive Mains input. head IH1, IH2 90-260VAC or IL2 with supplied coaxial cable Remove 1A fuse to Connect to disable the 9-30VDC Inductive SUPPLY (Free power supply plug supplied). P1= +V, P2= 0V. +12V Sig 0V connection to Tachometer Input...

  • Page 18: Re3D Controls & Connections

    RE3D CONTROLS & CONNECTIONS Rotary Encoders: The Display and Set rotary encoders are used to control all settings of the RE3D. The Display encoder is used to change the information shown on the display. Various options are available; a summary screen, large character display of strain, transmitter temperature, transmitter supply volts etc.
  • Page 19 Physical: Clear anodised aluminium enclosure 220 x 105 x 82mm excluding connectors. Weight 1.2Kg. Fuse: European type TR5, 2A Anti surge. TM Page 19...

  • Page 20: Re3D Programing

    RE3D PROGRAMING 4.3.1 Programming Notes The RE3D is a highly configurable device. Using the rotary encoders and display allows the unit to be setup to perform many measurement tasks. For instance the output from a strain gauge bridge can be displayed directly in µε or the reading can be scaled to display torque in Nm.

  • Page 21: Setting The Display Resolution

    4.3.2 Setting the Display Resolution For the Strain Transducer and Torque transducer input types the full scale is set in the Transducer mV/V menu item. For the Torque shaft Input type it is set in the Torque Full Scale menu. For the Strain Bridge type it is in the µε...

  • Page 22: Re3D With Tx34D Transmitter

    4.3.3.1 RE3D With TX34D Transmitter Display Display Display Tx Display Display Tx Display Tx Strain Supply Amplifier Calibration Volts Temp Error Status Mode Display Display Display Display Tx Shaft Tachometer Demodulator Serial Power Speed Error Count Number Analogue Output 1 Output 2 Output 3 Output 4...

  • Page 23: Re3D With Tx31D Transmitter

    4.3.3.2 RE3D With TX31D Transmitter Display Display Display Display Display Display Strain Demod Tacho Shaft Supply Error Speed Power Volts Count Analogue Output 1 Output 2 Output 3 Output 4 Outputs Trim Adjust Strain Zero Strain Gain trim Trim Strain Strain Units Scaling Display...

  • Page 24: Re3D Programming Menu

    4.3.4 RE3D Programming Menu DISPLAY or SET In this section = press the Display or Set rotary encoder, = turn the encoder Note that after programming pressing Display will return to the menu and pressing and holding the encoder for 2 seconds will return to the main display screen.

  • Page 25: Trim Adjust Menu

    4.3.7 Trim Adjust Menu This is used to make scaling adjustments to the strain gain and offset. For non programmable transmitters such as the TX31D zero offsets are removed here. Any scaling errors due to a non perfect gain set resistor can be removed using the Gain trim.

  • Page 26: Transducer Mv/V

    shaft material young’s modulus and poisons ratio. The calculated gain required is displayed and calibration resistor value can be calculated. Strain Bridge For connection to a strain bridge. The default output is µε. Settings are µε full scale, gauge factor and number of active gauges.

  • Page 27: Txxx Control

    4.3.10 TXxx Control This menu will be different for each transmitter type as different transmitters have different features. Typical menu options are as follows; 4.3.10.1 TX34 Calibration Mode DISPLAY, TX34 Control, DISPLAY, TX34 Cal Mode, DISPLAY, SET, Set required calibration mode, DISPLAY The calibration modes for this transmitter are;...

  • Page 28: Decoder Settings Menu

    4.3.12 Decoder Settings Menu 4.3.12.1 Set the transmitter type Press DISPLAY Scroll to Decoder Settings Press DISPLAY Scroll to Transmitter Type Press DISPLAY Press SET Scroll to select the correct transmitter type Press DISPLAY to return to the menu or press and hold for 2 seconds to exit the menu and return to the display screen. DISPLAY, Decoder Settings, DISPLAY, Transmitter Type, DISPLAY, SET,...

  • Page 29: Inductive Power Supply & Transmitter Installation

    INDUCTIVE POWER SUPPLY & TRANSMITTER INSTALLATION In most applications the shaft or component mounted transmitter is powered via inductive coupling. Inductive coupling uses the transformer principle to transfer power from a stationary head or loop mounted close to or around the shaft, across an air-gap and to a second head or loop mounted on the shaft.

  • Page 30: Inductive Head Ih2 Or Ih2/L With Shaft Mounted Power Pickup Loop

    The following sections describe installation of each possible inductive power supply components combination:-head/loop, loop/loop and loop/IP2 module). Installation procedure is the same for both single channel and multi-channel "D" range PCM and also "B" range fm/fm systems. MOST DIFFICULTIES WITH ROTARY TELEMETRY INSTALLATIONS OCCUR AS A RESULT OF DROPOUTS IN THE INDUCTIVE POWER SUPPLY TO THE TRANSMITTER.

  • Page 31: Suggested Installation For Inductive Head Ih2-Ih2/L With Power Pickup Loop In Split-Ring Assembly

    5.1.2 Suggested Installation for Inductive Head IH2-IH2/L with Power Pickup Loop in Split-Ring Assembly a) Decide upon desired location for the strain gauges and split-ring assembly, preferably with a distance of 75mm or more between the two. This is to prevent the inductive head magnetic field from inducing a voltage into the gauges or leadwires and causing a "once per revolution"...

  • Page 32: Inductive Head Ih2 Or Ih2/L With Power Pickup Loop Wound Onto Shaft Using Cak Kit

    5.1.3 Inductive Head IH2 or IH2/L with Power Pickup Loop Wound onto Shaft Using CAK Kit In many applications, where shaft rotational speeds are not extreme and operating temperature below about +80° C, the CAK kit may be used to attach the transmitter to the shaft, using steel strapping. A separate loop antenna is wound around the shaft to pickup power and transmit the data signal - required materials are included in the CAK kit.

  • Page 33: Inductive Loop Il2 With Shaft Mounted Power Pickup Loop Or Ip2 Pickup

    INDUCTIVE LOOP IL2 WITH SHAFT MOUNTED POWER PICKUP LOOP OR IP2 PICKUP Although slightly more complex to install, the inductive loop arrangement can transmit higher power and will accommodate much greater shaft displacements in both radial and axial directions. Also, the actual loop interface transformer module may be located remotely from the loop itself and connected by co-axial or flat ribbon cable.

  • Page 34: Suggested Installation Sequence For Inductive Loop Il2 With Power Pickup Loop Integrated In Split-Ring Assembly

    POWER TRANSMIT LOOP ANTENNA. IL2 INTERFACE MODULE REMOTELY LOCATED CUSTOM DESIGN 3 CHANNEL. TRANSMITTER HOUSING 50MM I.D. 62MM O.D. POWER POWER PICKUP PICKUP LOOP LOOP ANTENNA HOUSED ANTENNA HOUSED PHENOLIC RESIN CARRIER PHENOLIC RESIN CARRIER Figure 10 - Example of Custom Transmitter for Gearbox Installation. IL2 Module Remotely Located & Power Pickup Loop Integrated into Transmitter Housing 5.2.2 Suggested Installation Sequence for Inductive Loop IL2 with Power Pickup Loop Integrated in Split-...

  • Page 35: Inductive Loop Il2 With Power Pickup Loop Wound Onto Shaft Using Cak Kit

    IMPORTANT: A tuning adjuster is built into the IL2 module in order to be able to tune various different sizes of loop to resonance. The adjusting core should be locked into position with a small amount of silicone rubber once the loop has been tuned to give maximum voltage at the transmitter.

  • Page 36: Suggested Installation Sequence For Inductive Loop Il2 With Transmitter & Power Pickup Loop On Shaft Using Cak Kit

    INDUCTIVE POWER SUPPLY LOOP IN CUSTOM SHAPE. FORMED FROM 3MM BRASS ROD & ATTACHED TO IL2 MODULE STUDS VIA M4 TAG WASHERS PICKUP AERIAL LOOP SPACED AWAY FROM SHAFT WITH 3 LAYERS OF INSULATING FOAM TAPE. LOOP DIAMETERS <60MM LOOP TURNS INCREASE POWER...

  • Page 37: Inductive Loop Il2 With Inductive Power Pickup Ip2 On Shaft Using Cak Kit

    5.2.5 Inductive Loop IL2 with Inductive Power Pickup IP2 on Shaft Using CAK Kit Instead of a shaft-mounted loop antenna, this arrangement uses a shaft mounted pickup module IP2 to collect power. This is the best configuration where maximum air-gap and tolerance of shaft displacement is required. However, because the magnetic coupling across large air-gaps is small, high resistance strain gauges of 1000 or 2000 ohms should be used - not 500 or 350 ohms.
  • Page 38 STRAIN GAUGES UNDER STAINLESS STEEL SLEEVE TRANSMITTER & PICKUP ATTACHED TO SHAFT WITH CAK KIT STEEL STRAPPING CONNECT MODULE CUSTOM FORM LOOP TRANSMITTER LOOP ANTENNA ANTENNA WITH REMOTE PINS CONNECTION INTERFACE MODULE Figure 14 - Shaft Mounted Transmitter & IP2 Inductive Power Pickup Module with Custom Form Loop EXPERIMENTAL CUSTOM FORM...

  • Page 39: Suggested Installation Sequence For Inductive Loop Il2 With Transmitter & Ip2 Power Pickup On Shaft Using Cak Kit

    5.2.6 Suggested Installation Sequence for Inductive Loop IL2 with Transmitter & IP2 Power Pickup on Shaft Using CAK Kit: a) Decide upon desired location for the strain gauges and transmitter/IP2 Pickup assembly. If possible, locate the transmitter assembly where any shaft displacement is at a minimum, thus avoiding large variations in the air-gap between the stationary IL2 loop antenna and the shaft mounted IP2 pickup.

  • Page 40: Non-Operation

    NON-OPERATION If the system does not function the problem is almost certainly due to insufficient supply voltage to the transmitter, caused by over large air-gap, proximity of metal close to one or both loops, or a seriously de-tuned condition. A simple way to check is to apply a 6-9VDC supply (battery, for example) to the transmitter DC power supply pins (not the bridge excitation pins).

  • Page 41: Attaching Transmitter/Ip2 Pickup Module On Small Diameters

    The steel strapping supplied in the CAK kit has a limitation of about 35mm installation diameter, making it difficult to apply to small shafts. For this type of application a special version of the TX31D baseplate is available from Astech, which has tabs at each end of the plate.

  • Page 42: Dimensioned Drawings Of Ih2 & Il2

    DIMENSIONED DRAWINGS OF IH2 & IL2 Material: Body, Carp grade Tufnol Mounting Boss: 18mm Diameter Connector: TNC Socket (Female) Tolerance: ±0.1mm 2 x Ferrite Pole Pieces FERRITE TUNING SLUG TNC CONNECTOR MOUNTING BOSS FOR UNIVERSAL CLAMP RG58 TYPE CABLE Figure 16 - Dimensioned Drawing of Inductive Head IH2 TM Page 42...
  • Page 43 M4 STUDS FOR LOOP MOUNTING Material: Body, Carp grade Tufnol Studs: 2 x M4 Body Mounting Holes: 4 x M3 Threaded. (Alternative to Boss) Note: Attach only to non metalic backet) Connector: TNC Socket (Female) Tolerance: ±0.1mm FERRITE TUNING SLUG TNC CONNECTOR MOUNTING BOSS FOR UNIVERSAL CLAMP...

This manual is also suitable for:

Tx35/1/ifmTx34/1/ifm

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