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Recirculations

The method used to improve the resolution of a system using a digital LDT. The On time 

of a pulse width output is multiplied by a specified factor (from 1-127). This multiplication 

provides more counting time for the counter in the customer’s electronics, thus improving 

the resolution. The only disadvantage to higher recirculation numbers is the time needed to 

process the signals.

Return (Stop) Pulse

A pulse generated by the BlueOx to determine the location of the magnet assembly on the 

rod end.

Rod 

A stainless steel tube on which the magnet assembly travels.

RS422 Differential

Differential line driver.

Start Pulse

A pulse generated by either an external device or the LDT to start a pulse sequence.

Stop Pulse

(See Return Pulse)

Unipolar Power Supply

A power supply that provides a single voltage.

Volatile

Position held in memory that is lost on power down.

Wire Speed

The average time it takes a pulse to travel one inch on the wire.

Zero Pulse

By sending a signal to the probe at any time in the stroke a new zero point can be estab-

lished. (952 QD only)

35

Summary of Contents for 952 BlueOx

Page 1: ...952 BlueOx Linear Displacement Transducer ABSOLUTE PROCESS CONTROL KNOW WHERE YOU ARE REGARDLESS Linear Displacement Transducers Installation Manual Series 952...

Page 2: ...ntents or selected pages of this manual All rights to the contents of this manual are reserved by AMETEK BlueOx is a registered trademark of GEMCO The GEMCO Model 952 BlueOx is a Magnetostrictive Line...

Page 3: ...Toll Free 800 635 0289 Email apt sales ametek com Web www ametekfactoryautomation com Figure 1 1 BlueOx Linear Displacement Transducer Drawing D0234200 1 1 Dimension Drawing for all 952 LDTs 3...

Page 4: ...ay damage the LDT and will void your warranty To tighten the LDT within the bracket use the 1 75 hex mounting base on the head assembly Chapter 2 Installing the LDT If the length of the LDT s rod end...

Page 5: ...not be closer than 2 0 from the base of the LDT s hex head when the piston rod is fully retracted In instances where space restraints exist it may be required to countersink the magnet into the piston...

Page 6: ...e inserting the LDT The end cap should contain a 3 4 16 UNF 2B threaded hole Screw the LDT into this hole using the threads protruding from the LDT s hex mounting base WARNING Do not use the blue alum...

Page 7: ...il SAE J1926 1 OPTIONAL ROD BUSHING MAGNET SPACER O RING SEAL CABLE NUT STANDARD 4 HOLE MAGNET 0 5 BORE MINIMUM A 004 A 008 A 125 125 PITCH DIA REF SEE NOTE 4 094 MAX R 015 MAX 008 004 R RECOMMENDED M...

Page 8: ...e and terminated at the interface device end NOTE When grounding the LDT a single earth ground should be connected to the power supply common circuit ground The LDT power supply common pin B should be...

Page 9: ...ot lose programmed parameters on power loss The analog output is referenced to the analog common terminal and should not be referenced to any of the other common terminals To wire the 952A voltage LDT...

Page 10: ...8 2 1 6 4 1 White White Blue Stripe Power Supply Common 2 Brown Blue White Stripe No Connection 3 Gray White Orange Stripe Position Common 4 Pink Orange White Stripe Position Output 5 Red White Green...

Page 11: ...erential RS 422 output The maximum cable length for the differential digital LDTs is 1 500 feet To initiate a start pulse an external device is used This start pulse should be 1 0 microsecond in durat...

Page 12: ...0 2 MICROSECONDS MINIMUM WIDTH OF PULSE IS PROPORTIONAL TO DISTANCE BETWEEN MAGNET AND HEX HEAD OUTPUT PULSE WITHIN 50 NANOSECONDS AFTER INTERROGATION TO DISTANCE BETWEEN MAGNET AND HEX HEAD OUTPUT PU...

Page 13: ...t The maximum cable length for differential LDTs is 1 500 feet To initiate a start pulse an external device is used This start pulse should be a minimum of 1 0 microsecond in duration Within 50 nanose...

Page 14: ...GATION 15 TO 26 VDC POWER SUPPLY ORANGE NO CONNECTION PINOUT FOR STANDARD CIRCULAR CONNECTOR AT TRANSDUCER HEAD GREEN YELLOW PURPLE NO CONNECTION NO CONNECTION 15 VDC FOR BIPOLAR POWER SUPPLY POWER SU...

Page 15: ...his feature is hardware specific and must be specified at time of order The differential feature allows the distance between two magnets to be measured The magnets must remain within the active stroke...

Page 16: ...lication Note Overview This application note will attempt to clarify the type of signals coming out of and going into the 952QD quadrature probe Inputs The quadrature probe has two inputs the Zero and...

Page 17: ...e and signal pins The value of the termination resistor is by RS 422 specifications typically 100 ohms However some receivers will work with greater resistance values and some with no termination resi...

Page 18: ...y Connections including grounding and shielding LDT Input Output Connections Power Supply Ground Connections The BlueOx standard cable is Alpha XTRA GUARD 2 25110 SUPRASHIELD a multi conductor cable w...

Page 19: ...ero position In probes with volatile storage the zero point will The type of signal needed for the Burst Zero inputs E Sinking PLC Sourcing Outputs C Sourcing PLC Sinking Outputs T TTL See Appendix C...

Page 20: ...1080 North Crooks Road Clawson MI 48017 Phone 248 435 0700 Figure 4 2 952QD Wiring Diagram Drawing E0237900 4 6 952 QD Wiring Diagram 20...

Page 21: ...Toll Free 800 635 0289 Email apt sales ametek com Web www ametekfactoryautomation com Figure 4 3 Input Signal Connections for 952 QD LDT Drawing E0237700 21...

Page 22: ...QD LDT Drawing E0237600 Rt is the termination resistor typically used for differential connections If these termination resistors are not internal to the controller they should be installed externall...

Page 23: ...ses at a fixed rate of speed The frequency or pulse rate of the 952QD is factory set to 10KHZ 1 00MHZ consult part numbers for your model The input to the PLC or display will determine the frequency n...

Page 24: ...rough the splice and terminated at the interface device end Unipolar Power Supply Check This section will help you to determine if your power supply is adequate for the LDT to operate properly or if t...

Page 25: ...cable between the power supply and the LDT Check for continuity from one end of the cable to the other Also verify that no shorts exist between pins 7 Reconnect the mating connector to the LDT 8 Turn...

Page 26: ...terface device end Unipolar Power Supply Check This section will help you to determine if your power supply is adequate for the LDT to operate properly or if the LDT s cable has a short or open In ord...

Page 27: ...ansient producing lines The shield should be carried through the splice and terminated at the interface device end Unipolar Power Supply Check This section will help determine if the power supply is a...

Page 28: ...r short or the power supply is not supplying sufficient power To verify this perform the following steps 1 Turn the power supply off 2 Remove the mating connector from the LDT 3 Turn the power supply...

Page 29: ...the active measuring range will be 2 5 less than the specified stroke due to the 2 5 magnet to magnet separation distance requirement Null Zone X _ Standard 2 inch Null N Insert non standard Null over...

Page 30: ...es D _ Insert non standard Dead Zone over 2 5 inches If option E environmental connector is selected mating connector and or pigtail must be ordered separately NOTE 1 On unsupported stroke lengths gre...

Page 31: ...E F7 M1 D N Output Resolution Cycles per inch maximum internal resolution is 0 001 inches 1000 standard available range is 0001 through 9999 Input Type E Sinking typically used with sourcing output t...

Page 32: ...00 50 8 mm standard Head Enclosure 3 76 20 mm high with 1 75 44 45 mm diameter hex and cover are NEMA 4 Electrical Specifications Input Voltage Unipolar Bipolar Analog 13 5 to 26 4 VDC Digital 13 5 to...

Page 33: ...ion S Only Output May Vary by 0 1 when Subjected to Severe Levels of Electrical Noise Digital Specification Update Time Controller Dependent Digital Output CP RS 422 Control Pulse VP RS 422 Pulse Widt...

Page 34: ...to derive position Input Type Used on 952 QD to determine input type for Burst and Zero modes ie sinking sourcing or TTL Internal Interrogations Pulses generated by the LDT usually to initiate a puls...

Page 35: ...ls Return Stop Pulse A pulse generated by the BlueOx to determine the location of the magnet assembly on the rod end Rod A stainless steel tube on which the magnet assembly travels RS422 Differential...

Page 36: ...17 Copyright 2005 by AMETEK FACTORY AUTOMATION All Rights Reserved Made in the USA Other Products 1080 North Crooks Road Clawson MI 48017 Phone 248 435 0700 Toll Free 800 635 0289 Email apt sales amet...

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