Crane checkstar multi transducerThe CheckStar Multi is the latest generation of Crane Electronics market leading CheckStar in line rotary torque transducer. It raises the standard for dynamic torque and angle measurement of all continuous drive and impulse tools, with proven reliable performance in thousands of applications worldwide.  If angle is specified, the CheckStar Multi rotary torque transducer will include an angle encoder giving 0.125° resolution (720 PPR). It also incorporates a light ring, giving the user visual feedback of the status of a tightening,when used with a Crane readout or data collector. Whatever the vibration and shock loads experienced, CheckStar Multi’s patented contact system ensures a connection is always maintained between the readout and the strain gauges. Inferior systems suffer from “brush bounce” that leads to unreliable torque readings. The CheckStar Multi fits in line between the assembly tool and the fastener, measuring the actual torques applied and angular rotation of the fastener, under production conditions. Whatever the vibration and shock loads experienced, CheckStar Multi’s patented contact system ensures a connection is always maintained between the readout and the strain gauges. Inferior systems suffer from “brush bounce” that leads to unreliable torque readings. The low inertia design of the CheckStar Multi ensures accurate and repeatable measurement of high speed transients, such as the point of shut-off on continuous drive tools and the pulsing of impulse tools. Using on board intelligence the CheckStar Multi is automatically recognised by a Crane data collector or readout device, eliminating set-up errors and enabling logging of serial number against measurements for complete traceability. The CheckStar Multi can also be used where a user needs the advanced features of the transducer but already has a data collector or readout device from another manufacturer.   pdf icon Multi CheckStar data sheet pdf icon Dimentional Drawing   [hr_shadow] Special Features Patented mechanism for reliable measurement of impulse tools. Integrated light ring giving visual indication of fastening status.   Tool Compatibility All torque tools, including impulse tools (not impact tools). Joint kit recommended for off-line measurement of continuous drive and impulse tools to represent joint conditions.   Physical Measurements Bi-directional torque (clockwise calibration unless otherwise specified) . Optional bi-directional angle encoder (also enables RPM measurement on suitable indicator).   Plug and Play Transducer A Crane readout or data collector can automatically read the following information from the CheckStar Multi transducer. Torque range, angle encoder data, serial number, calibration due date.   Calibration Issued with calibration certificate traceable to National and International Standards.  
Standard Crane Calibration 10 points; single direction (clockwise unless otherwise requested); 10% to 100% of nominal torque. Recalibration is recommended every 12 months.   Bi direction Standard Calibration (optional) 10 points; each direction; from 10% to 100% of nominal torque.   UKAS Calibration Calibration to BS 7882.   Construction Patented slip ring mechanism eliminating signal losses due to brush bounce and enabling low running friction in either direction (<0.1% rated torque or 0.1Nm, whichever is greater); design is durability tested to >100 million revolutions with no measurable degradation of electrical performance or wear. Aluminium housing. Stainless steel shaft. Overload capacity: 125% rated torque. Square drives to ANSI B107-4 – 1982; BS4006 – 1992; DIN 3121 – 1987. Male square drive fitted with detent pin that may be removed if required. Female square drive supplied with retaining pin that may be removed if required. Female hex drive fitted with ball and spring retainer.   Connections Compatible with BS 9522 – F0017. Cable mounting type 14-19S. Complies with MIL-C-26482.   Zero Stability < ± 0.1% FSD/°C.   Static Accuracy ± 0.25% FSD.   Operating Environment Temperature: 5 to 40°C (-10 to 60°C with reduced specification). Humidity: 10 to 75% non-condensing. Ingress protection rating: IP40.   Warranty 2 years parts and labour against faulty workmanship or materials. The second year of warranty is only valid if the unit has been recalibrated at an authorised. Crane Electronics Service Centre after the first year.  
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Key Features

  • In line rotary torque transducer with optional angle measurement
  • Low inertia benefits accurate dynamic measurement
  • Patented design ensures no brush bounce even when used with impulse tools
  • Suitable for use with all continuous drive tools, impulse tools and torque wrenches
  • Compatible with most industry standard data collectors and readouts
  • Accuracy +/- 0.25% of full scale
  • Angle measurement option with no size increase (0.125° resolution)
  • Low friction eliminates wear and supports accuracy
  • Automatic transducer recognition with Crane data collectors and torque readout devices
  • Easily viewed light ring showing status, when used with Crane data collectors and readout devices
  • Square and hex drives available
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