Clarke-Hess Communications Research
an electronics test and measurement company specializing in dc/low frequency applications.
- (631) 698-3350
- (631) 698-3356
- info@clarke-hess.com
- 3243 Route 112
Medford, NY 11763
United States
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Products
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product
Current Source
M151
Clarke-Hess Communications Research
The Model M151 is a stable high current calibrator up to 120 A. Basic accuracy is 0.035 %. It can be controlled viaRS232 or GPIB interface. The Model 151 can function in a simulated amplifier mode to increase the current capabilityof any multifunction calibrator. It is suitable for power meter calibration because it can be synchronized with the inputsignal not only in amplitude but also in frequency and phase. The current terminals are isolated up to 450 Vpk againstcase (protective earth).
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product
Phase Angle Voltmeter
2600
Clarke-Hess Communications Research
The Model 2600 Phase Angle Voltmeter replaces the very popular Model 2500A. With the latest and most advanced DSP technology, this instrument provides a new level of performance and user friendliness. In addition, the Model 2600 Phase Angle Voltmeter is considerably less expensive than other "traditional" Phase Angle Voltmeters. By keeping classic measurements, "at the touch of a button", the Model 2600 behaves more like an instrument and less like a computer. The unit is extremely easy to use yet contains a host of features and performance characteristics that set it apart from all others.
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product
Phase Meter
6000A
Clarke-Hess Communications Research
The Model 6000A Phase Meter replaces the very popular Model 6000. Using the latest digital techniques and optimally designed analog front end, the Model 6000A out-performs any other phase meter on the market today. It also does this at a remarkably low cost. The unit automatically selects the proper range for both amplitude and phase and is waveshape independent.
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product
Phase Meter Current Shunts
610 and 650
Clarke-Hess Communications Research
The Model 610 and 650 Current Shunts are specifically designed to operate with the Model 6000A Precision Phase Meter. These shunts are frequency tuned to have negligible phase shift (less than 5m) at 50/60Hz making them ideal for line frequency applications. They can also be idealized for other frequencies as specified by the user. Consult factory for details.
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product
Phase Verification Bridges
5002
Clarke-Hess Communications Research
The Model 5002 Phase Verification Bridge set comprises passive devices that are used in conjunction with Model 5500-2 Phase Standard and an output null indicator such as a true rms voltmeter, an oscilloscope or a wave analyzer to verify that the Phase Standard is continuing to operate within its specified phase accuracy limits.
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product
Transconductance Amplifier
8100
Clarke-Hess Communications Research
The Model 8100 Transconductance Amplifier is a precision, high stability, high accuracy instrument which produces an output current which is directly proportional to the input voltage over the frequency range from dc to 100kHz.
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product
Wideband Power Analyzer
2335A
Clarke-Hess Communications Research
The Model 2335A Wideband Power Analyzer is a precision, high accuracy, high frequency auto-ranging instrument which measures and displays true rms Voltage, true rms Current, and true mean Power over a frequency range from dc to more than 1MHz. Full scale Current and Voltage inputs are typically measured within 0.1% of the amplitude reading to at least 500kHz. The corresponding Power is typically measured to within 0.1% of the input Volt-Amperes to 250kHz and to within 0.2% of the input Volt-Amperes to 500kHz for loads having any Power Factor.
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product
Portable Multifunction Calibrator
M143
Clarke-Hess Communications Research
The M143 Multifunction calibrator is a cost saving solution for calibration of electric meters with up to 1000 V and 20 A. It offersa basic accuracy of 0.01% in DC voltage for calibration of 3 and 4 digit multimeters. The resistance function is covered byeight fix resistors in range from 10 to 100 M. The calibrator offers TC temperature sensor simulation. It can be deliveredoptionally as well with RTD temperature sensor simulator. Thanks to its small dimensions and low weight the unit can be usedeasily for field calibration work.
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product
High Accuracy AC Reference Source
515
Clarke-Hess Communications Research
The Model 515 High Accuracy AC Reference Generator fills a need for a relatively low cost and practical solution for supplying a reference excitation to typical LVDT and Synchro/Resolver transducers. The Model 515 has built-in load sensing which, in effect, yields "zero" output impedance and virtually eliminates the effects of fluctuating output loads. With up to 15 VA of output into loads with as much as 80 of phase shift, the Model 515 is ideally suited to driving inductive loads.
