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MTS Systems Temposonics II LDT Installation Instructions Manual

Linear displacement transducer
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Installation & Instruction
Manual for Analog Systems
11-98 550032 Revision F
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  • Page 1 ® Part No. 550033 Rev. E T e m p o s o n i c s ® P o s i t i o n S e n s o r s Installation & Instruction Manual for Analog Systems 11-98 550032 Revision F...
  • Page 2 MTS PHONE NUMBERS Application questions: 800-633-7609 Repair Service: 800-248-0532 Fax: 919-677-0200 SHIPPING ADDRESS MTS Systems Corporation Sensors Division 3001 Sheldon Drive Cary, North Carolina 27513 HOURS Monday - Thursday 7:30 a.m. to 6:30 p.m. EST/EDT Friday 7:30 a.m. to 5:00 p.m. EST/EDT...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS Section Page INTRODUCTION Theory of Operation/Magnetostriction Temposonics II LDT Specifications for Sensors <180 Inches Temposonics II LDT Specifications for Sensors ³ 180 inches TEMPOSONICS II LDT INSTALLATION Types of Transducer Supports 2.1.1 Loop Supports 2.1.2 Channel Supports 2.1.3...

  • Page 4: Introduction

    1. Introduction to the Temposonics II Linear Displacement Transducer (LDT) The Temposonics II LDT precisely senses the position of an external magnet to measure displacement with a high degree of accuracy and resolution. Using the principle of magnetostriction (see Section 1.1, below), the Temposonics II LDT measures the time interval between the initiation of an interrogation pulse and the detection of a return pulse.

  • Page 5: Temposonics Ii Ldt Specifications For Sensors <180 Inches

    1.2 Temposonics II LDT Specifications for Sensors <180 Inches Parameter Specifications Input Voltage: ± 12 to ± 15 Vdc Current Draw: Transducer Only: ± 15 Vdc at 100 mA maximum, 25 mA minimum (current draw varies with magnet position, maximum draw occurs when magnet is at 2 in.

  • Page 6: Temposonics Ii Ldt Installation

    2. Temposonics II LDT Installation Before beginning installation, be sure you know the following dimensions (as illustrated in Figures 2-1 to 2-3a-c.): • Null Space • Stroke • Dead Zone Flange to Tip Standard Null Dead Zone (2.0 in., 50 mm) 2.50 in.
  • Page 7 1. Use the 3/4 inch (19 mm), 16 UNF thread of the transducer to mount it at the selected location. Leave room to access the hex head. If a pressure or moisture seal is required, install an O-ring (type MS 28778-8 is recommended) in the special groove.

  • Page 8: Types Of Transducer Supports

    NOTE: Clearance between the magnet and the transducer rod is not critical. However, contact between the components will cause wear over time. The installation of supports or readjustment of the supports is recommended if the magnet contacts the transducer rod. 3.

  • Page 9: Channel Supports

    2.1.2 Channel Supports Channel supports, being typically straight, are normally used with rigid transducers. A channel support consists of a straight channel with loop supports mounted at intervals. The loop supports are required to keep the transducer within the channel. Figure 2-5 shows a channel support. Channel supports are available from various manufacturers or may be fabricated.

  • Page 10: Open Magnets

    2.2 Open Magnets When using an open magnet, make sure the rod is positioned at all times within the “active” zone of the magnet. The transducer cannot operate properly unless the entire stroke of the transducer rod is located within this zone. The active zone, as shown in Figure 2-7, lies within the inside diameter of the magnet. Magnet Active Zone Figure 2-7...
  • Page 11 Figure 2-8 shows a typical cylinder installation. Review the following before attempting this type of installation. • Use a non-ferrous (plastic, brass, Teflon®, etc.) spacer [1] to provide 1/8 inch (32 mm) minimum space between the magnet and the piston. •...
  • Page 12 1.180 in. Recommended Minimum Spotface Diameter See Note 1 0.004 A 0.008 A ø0.813 in. ø0.866 in. ±0.002 in. Minimum See Note 2 0.008 in. 0.004 in. 0.094 in. Max. 0.125 min. 0.106 in. ±0.008 in. 1.100 in. R0.015 in. 1.250 in.

  • Page 13: Installing Magnets

    2.5 Installing Magnets Figure 2-11 below shows the standard magnet types and dimensions. The circular magnet with an outside diameter of 1.29 inches and 0.53 inch inside diameter (Part No. 201542) is the most common and is suit- able for most applications. Larger magnets, with an outside diameter of 2.5 inches are typically only used with Temposonics transducers that exceed 180 inches in stroke length.

  • Page 14: Temposonics Ii Wiring

    3. Temposonics II Wiring Table 3A Temposonics II Connections (Neuter Version and with APM) Temposonics II Integrated Temposonics II Configurations: or Extension Cable • Neuter - No Personality Module (see Note 1) • APM - Analog Personality Module Pin No. Wire Color Code Wire Color Code Neuter APM Option...

  • Page 15: Troubleshooting The Linear Displacement Transducer

    4. Troubleshooting the Linear Displacement Transducer NOTE: The following checklist is for general diagnostic purposes. Purchase of replace- ment components should not be based solely on this checklist. Consult MTS Sensors Division for recommendations and factory service before ordering replacement components. Use the below checklist when operational problems are encountered.

  • Page 16: Grounding

    5. Grounding Ground connection between bracket Flange and outer cover made by threads (electrically isolated from threads) Connector (10 pins) Bracket (internal to head enclosure) Transducer Rod (3/8 in. stainless steel) Machine Ground Head Assembly Grounding Diagram Cable Shield (no connection) Driver/Amplifier Module Signals Return(s)

  • Page 17: Introduction To Analog Systems

    ± 13.5 to ±15 Vdc@ 190 mA (bipolar) Magnet USER'S CONTROL Output: SYSTEM To be specified Temposonics II LDT Range: - 10 to + 10 Vdc Analog Personality Module Figure 6-1 Analog System Configuration with Analog Personality Module ANALOG OUTPUT POWER SUPPLY...

  • Page 18: Specifications Of Analog System Components

    6.1 Specifications of Analog System Components 6.1a Analog Personality Module (APM) Parameter Specification Power Requirements: ± 13.5 Vdc to ± 15 Vdc at 190 mA maximum, 115 mA minimum Output Impedance: 10 K½ minimum load for voltage output Output: Specified by user; Range: - 10 Vdc to + 10 Vdc, forward or reverse acting Temperature Requirements: Storage: - 40 to 150°F (- 40 to 70°C)

  • Page 19: Analog Personality Module

    7. Analog Personality Module The Analog Personality Module (APM) is mounted inside the electronics housing of the Temposonics II linear dis- placement transducer and produces a direct analog output. No additional interfacing electronics are required. The APM processes digital data into an analog output via a digital to analog converter (DAC). MTS uses a 16-bit DAC to provide the best available resolution performance.
  • Page 20 The mode desired is selected at the time of order and factory pre-set. The following charts identify the update time and resolution for each mode. Resolution Preferred Mode Update Time Resolution 0.005 0.008 0.004 0.007 0.006 0.003 0.005 0.004 0.002 0.003 0.002 0.001...

  • Page 21: Apm Programming Procedure

    7.2 APM Programming Procedure ! CAUTION ! If the APM is being programmed for the first time, the analog output at power-up will be near zero volts. The programming steps are the same in this case, but the analog output will return to zero volts until valid infor- mation is stored for both Set Point 1 and Set Point 2.
  • Page 22 In addition, the APM can be programmed for one of three performance modes, as described earlier. During the programming procedure, each mode is represented by a particular output voltage. They are as follows: Resolution-Preferred Mode - In the programming procedure, the Resolution Preferred Mode is indicated by an output of 0 volts.
  • Page 23 3. At this point, repeated presses of the SW2 button will cause the APM to cycle through the three perfor- mance modes. Continue to press and release the SW2 button until the voltage output indicates the voltage associated with the correct mode for your application. Once the correct voltage is displayed, press and release the SW1 button to accept the mode setting.

  • Page 24: Installing The Analog Output Module (Aom)

    8. Installing the Analog Output Module (AOM) Dimensions of the AOM are shown below in Figure 8-1. The mounting hole dimensions shown are also stamped on the back of the module. Mount the AOM as shown, using two socket head cap-screws. (Shown with Cover Removed) A B C D E F H J K...

  • Page 25: Analog Output Module Adjustments

    9. Analog Output Module Adjustments This section explains how to adjust and calibrate the Temposonics II LDT system using an AOM. The AOM includes adjustments for null (zero), and full-scale (span). The adjustments compensate for the following: • Differences between transducer gradients.

  • Page 26: Null And Full-Scale Adjustments

    9.2 Null and Full-Scale Adjustments The following procedures calibrate the null position and the full-scale position to the required output levels. Refer to Figure 9-1 for the adjustment locations. NOTE: The following procedure assumes the standard full-scale 0 to 10 Vdc output is supplied.

  • Page 27: Velocity Null Adjustments

    9.3 Velocity Null Adjustment The AOM can be provided with an optional velocity output. For those units, velocity zero and span adjustments are provided. The velocity zero and velocity span adjustments are factory set and should not require readjustment. A velocity output signal of 0 (zero) volts represents a static displacement (no motion).

  • Page 28: Analog Output Module/Wiring Procedures

    10. Analog Output Module/ Wiring Procedures This section describes wiring procedures for analog systems that use the Analog Output Module, including: • 0 to 10 V displacement (forward and reverse acting) • -10 to +10 V displacement (forward and reverse acting) •...

  • Page 29: J1 Installation Wiring

    10.2 J1 Installation Wiring The J1 cable provides the AOM voltage inputs from the DC power supply. It also provides displacement outputs to the receiving device. Take the following steps to connect J1: 1. One of the screws securing the cover of the AOM has a raised head. Connect a ground wire from that screw head to a central earth ground or to the power supply ground (if it is grounded).

  • Page 30: J1 Connections For Aom

    10.3 J1 Connections for AOM The AOM is provided with either a strain relief connector, which accepts a pigtailed connection directly into terminals blocks located inside the AOM enclosure, or a threaded MS connectors. Tables 10A through 10F, below, indicate the appropriate connection to make for either configuration. Make sure that you fol- low the appropriate table for your specified options.
  • Page 31 Table 10C J1 Connections w/24 V Power Supply Option Strain Relief Connection MS Connector Pin (J1) Function (+) Displacement Output (-) Displacement Output 24 Vdc No Connection DC Common Table 10D J1 Connections w/ 24 V Power Supply & Velocity Output Options Strain Relief Connection MS Connector Pin (J1) Function...

  • Page 32: J1 Connection To Aom With Ms Connectors

    10.4 J1 Connection to AOM with MS Connectors Table 10G Voltage Output Terminal Block Pin Connection (J1) Function #1 Function #2 Connections * (w/Standard ± 15 Vdc P.S.) (w/Optional + 24 Vdc P.S.) TB3-H + 15 Vdc + 24 Vdc TB3-J - 15Vdc TB3-K...
  • Page 33 3. MS Connector Only: If necessary, fabricate the J2 cable. Be sure to use the recommended cable for the required length. The color code refers to cables supplied with the system. Solder the connections to the MS connector supplied with the AOM. Use any cable capable of maintaining the signals for the required length. Ensure the solder connections are clean and free of excessive solder.
  • Page 34 Table 10K Retrofit Connections - Temposonics II Replacement of Existing Temposonics I with AOM Temposonics II Integrated or Extension Cable (Notes 1, 2) Analog Output Module (AOM) Pin No. Wire Color Code Wire Color Code Functional Description Terminal Blocks Military Style (MS) Connectors White/Blue Stripe White...

  • Page 35: Troubleshooting The Analog Output Module

    11. Troubleshooting the Analog Output Module Use the troubleshooting procedures in this section when operational problems are encountered. The procedures are listed in order of frequency of occurrence, and should be completed in the order shown. NOTE: The following procedures are for general diagnostic purposes.

  • Page 36: Grounding

    5. Connect a 60 ½ to 75 ½ resistor across Pins A and C of the MS connector or pins H and K of TB3. The voltage across the resistor should be +14.7 Vdc (minimum). 6. Connect a 230 ½ to 250 ½ resistor across Pins B and C. The voltage across the resistor should be -14.7 Vdc (minimum).
  • Page 37 Figure 11-1 Test Point (TP) Locations 5 Volts at Test Point 1 0 Volts, TB3-K Update Time 1 ms 3 - 5 Volt Interrogation pulse sent to TB2-E Pulse returned from TB2-C (approximately 2-3 Volts) 20ms 15ms 20ms TTL level pulse, 3-5 Volts located at Test Point 3 Pulse-width modulated output 3-5 Volts at Test Point 2...
  • Page 38 NOTE: Do not interchange transducers and AOMs with differing model numbers, without first consulting MTS Sensors Division. A. If a spare transducer of the same stroke and model number is available, connect the spare transducer to the AOM and check the displacement readings at the system electronics. B.

  • Page 39: Analog Output Card

    12. Analog Output Card The Analog Output Card is a plug-in type electronics card that performs the same functions as the Analog Output Module (AOM) and can be used as a direct replacement (physically and functionally) for the "old style" Temposonics Electronics Card.
  • Page 40 The Analog Output Card has a 15 pin edge card connector, the function of each pin is as follows: Table 12A Analog Output Card Pin Identification Pin No. Function DC Ground (Current return for grounded systems) +5 Vdc input (optional) - 15 Vdc input +12 Vdc to transducer (for strokes <...
  • Page 41 Phone: + 813 3239-3003 Fax: + 813 3262-7780 Temposonics sensors are a registered trademark of MTS Systems Corporation All Temposonics sensors are covered by US patent number 5,545,984 and others. Additional patents are pending. Part Number: 11-98 550032 Revision F...

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