Transducer Calibrator Systems

Unholtz-Dickie Calibration Systems have earned their place in industry as the standard for calibrating accelerometers and velocity transducers. The Models 660C & 680C are UD's latest generation of automatic calibration systems, both utilizing the expanded features of the Pentium based Vwin II Windows vibration control system.

The Model 660C offers a low force economical calibration solution and combines the features of the Vwin II-C calibrator with the portability of the TA30-5PM-C amplifier and shaker. The Model 680C offers a larger table and expanded performance envelope for higher force, displacement and load capability. It is configured with the Model TA100CL-S032-C amplifier and shaker.

Both systems include the TSC-3 transducer signal conditioner and 8B6 Lab and Working standard accelerometers and respective mounting hardware. The Models 660C & 680C are complete systems and include everything needed to calibrate accelerometers and velocity transducers. These units are critical for satisfying ISO9000 test requirements of vibration transducers.

Attention Government labs, The Model 680 Transducer Calibration System (shown above) is now available on GSA!!!

Calibration Certificates

Select the links below to view sample Html Calibration Certificates generated by the Calibration software. Please click on the UDCO logo of the Certificate or Navigation buttons of the Web browser to get back to this page. Note that custom certificates available.

Standard Calibration Certificate generated for UD 10B10T Accelerometer

Standard Calibration Certificate generated for UD 8B6 Accelerometer

Vwin II Transducer Controller Provides:

Fast Computer Controlled Calibration of Accelerometers and Velocity Transducers
Simple Setup and Definition
Precise Shaker Control
Reference & Test Transducer Measurement
Large Data Storage
Automatic Certification Report
Back-to-Back Accelerometer Calibration Method Using NIST Standard Reference Accelerometer
Precision Sinusoidal Comparison Technique
Logarithmic Sweep or Stepped-Frequency Sine
Wide Frequency Range of 2 to 10,000 Hz
Wide Acceleration Range (0.1 to 75 g) with Working Standard and Test Accelerometer Mounted (Model 680C)
Large Mounting Surface 3.25 inch (82.5 mm) Diameter Armature (Model 680C)
High Velocity to 50 in/sec (1.3 m/sec)
Accelerometer Sensitivity 0.1 to 5,000 pc/g or mv/g
Velocity Transducer Sensitivity 0.2 to 5,000 mv - sec/in
Ceramic Insert Provides Excellent Stiffness, Back-to-Back Mounting, Rigid Coupling to Table, Electrical Isolation, and Protection of Working Standard Accelerometer
Graphical Spectrum Display of Sensitivity, Deviation, Control, Reference and Phase
Tabular Listing of Selectable Frequencies, Sensitivities, and Deviation
Air Cooled Power Amplifier and Shaker
Heavy Duty Pedestal Base (S032-C)

TSC-3 Transducer Signal Conditioner

The Transducer Signal Conditioner includes circuitry for conditioning and amplification of the reference charge channel, and also transducer channels for charge, voltage and velocity transducers. Channel flatness and gain characteristics are factory adjusted.

System Features

System Model	Model 660C	Model 680C
Sine Force	50 lbf (222 N) with Std Blower 25 lbf (111 N) without Blower	100 lbf (445 N) with Std Blower 150 lbf (677 N) with Optional Blower
Frequency Range	5 to 10,000 Hz Accelerometers 5 to 5,000 Hz Velocity Transducers	2 to 10,000 Hz Accelerometers 5 to 5,000 Hz Velocity Transducers
Maximum Acceleration	16 g pk, to 10,000 Hz w/o Blower 32 g pk, to 7,000 Hz w/ Blower	50 g pk to 10,000 Hz, w/ Std Blower 75 g pk to 10,000 Hz, w/ Optional Blower
Maximum Velocity (pk)	50 in/sec (1.3 m/sec) Max 25 to 60 Hz, 32 in/sec (.83 m/sec)	50 in/sec (1.3 m/sec) Max 25 to 60 Hz, 50 in/sec (1.3 m/sec)
Displacement (pk-pk)	0.5 inch (13 mm)	0.75 inch (19 mm)
Moving Weight w/o DUT	1.45 lbs (.66 kg) Armature with Bridge, Reference Accelerometer & Ceramic Coupler	2.0 lbs (0.91 kg) Armature with integral 8B6 Reference Accelerometer & Ceramic Coupler
Armature Diameter	2.25 inch (57 mm)	3.25 inch (83 mm)
Armature Resonance (f_n)	5 kHz Typical w/Bridge	8.2 kHz Typical
Amplifier Model (output)	TA30 (250 VA)	TA100CL (1.5 KVA)
Stray Gauss Level	< 35 gauss typ @ 1 inch above Ceramic Coupler	< 5 gauss @ 1.0 inch above table
Total Harmonic Distortion	Typically: < 0.5%, 50 Hz to 10 kHz (except typical 3% at sub-harmonics of armature resonance) @ 2 g: Typically < 0.5%, 50 Hz to 10 kHz (except typical 3% at sub-harmonics of armature resonance)	@ 50 g: < 1.5%, 100 Hz to 10 kHz (except < 5% at sub-harmonics of armature resonance) < 0.5%, Typical 300 - 2,000 Hz @ 2 g: Typically < 0.5% to 10 kHz (except typically < 2% at sub-harmonics of armature resonance) < 3% Max @ 10 Hz Typically < 1.0% 50 Hz to 10 kHz (except < 2% at sub-harmonics of armature resonance) < 5% max @ 10 to 50 Hz 9 w/ std blower
Cross Axis Response	Typically: < 10%, 20 Hz to 1800 Hz @ 10 g: < 20%, 1800 Hz to 10,000 Hz	@ 10 g: < 6% (typ 2.5%), 20 Hz to 4 kHz < 10%, 4 kHz to 10 kHz (Except for isolated peaks of 20%)
Hum & Noise	0.03 g rms	0.03 g rms
Precision of Frequency Setting	0.1% (typ. 0.03%) of Test Frequency in Stepped Mode
Estimated total System Uncertainty includes Absolute Uncertainty of Lab Standard NIST Calibration and Transfer Uncertainty of DUT	+/- 1.2% 10 Hz to 2 kHz +/- 2.1% 2 kHz to 4 kHz +/- 2.4% rising to +/- 3.3% 4 kHz to 10 kHz	+/- 1.2% 10 Hz to 2 kHz +/- 2.1% 2 kHz to 4 kHz +/- 2.4% rising to +/- 3.3% 4 kHz to 10 kHz
Safety Protection	Protective Seals and Screen on Shaker Amplifier Gain Control w/Detent Protection	Shaker Over Travel Limit Switch Shaker Cooling Air Switch Protective Seals and Screen on Shaker
Electrical Requirements	120 V AC 1 phase , 60 Hz (Standard) 220 V AC 1 phase, 50 Hz (Optional)	480 V AC 3 phase , 60 Hz (Standard) 120 V AC 1 phase , 60 Hz (Standard) 380 V AC 3 phase , 50 Hz (Optional) 220 V AC 1 phase , 50 Hz (Optional)
Cooling	Totally Air Cooled
Floor Isolation	Standard Isomode Pads < 20 Hz	Standard Isomode Pads < 20 Hz (Optional Air Bag Base < 12 Hz Model 680 only)