June 2004Maintenance, Test & Measurement, Calibration
Danntech has recently developed a frequency to current or voltage converter suitable for use over a wide range of frequencies as low as 0,01 Hz, and up to 100 kHz. The unit occupies only 25 mm of DIN rail space and can be powered by 12 or 24 V d.c.
The device was primarily designed for low cost, non-contact rotational speed monitoring and for output conversion of pulse output flowmeters to 4-20 mA, 0-20 mA or 0-10 V. Being microprocessor-based, the unit uses the measurement of period for the low frequency inputs and then changes to frequency measurement for the higher frequencies. This ensures a linear, ripple free output no matter what frequency range is selected.
A typical input frequency range for 4 to 20 mA output could be 0,01 Hz to 1 Hz - that is from 1 pulse every 100 seconds to 1 pulse per second. The output linearity is better than 0,2% of the full scale. The input has optical isolation to greater than 1 kV and can be used directly with NPN or PNP proximity sensors. The input voltage range can be from 2 V d.c. (or less) to greater than 15 V d.c. (up to 27 V d.c.) - variations of this range are possible.
The output signal zero and span are adjustable to approximately ±5% of the range. The step response is approximately 300 ms or at the input pulse frequency for low frequency inputs. Two LEDs provide diagnostic and input indication - the power On LED (green) flashes at approximately 1 Hz and the Frequency Detected LED (yellow) indicates when input pulses are present.
Information such a datasheets, application notes, prices and availability are available from the Danntech website.
OEM-standard repairs for industrial gear units
Maintenance, Test & Measurement, Calibration
BMG, the official OEM for Hansen gearboxes, is authorised to repair Hansen industrial gear units in strict accordance with the manufacturer’s documented procedures, preserving the design tolerances and operational reliability required in demanding industrial environments.
Read more...The smart choice for test and measurement solutions RS South Africa
Maintenance, Test & Measurement, Calibration
As the demand for precision and efficiency continues to grow across industries, RS PRO, the own brand of RS, provides a complete portfolio of test and measurement equipment engineered to meet the highest standards of performance, safety and value.
Read more...Verification using Heartbeat Technology is a breeze
Maintenance, Test & Measurement, Calibration
Heartbeat Technology reflects Endress+Hauser’s long-term commitment to enhancing measurement reliability and efficiency across a growing product portfolio.
Read more...Clog-resistant nozzle for powerful stationary tank cleaning
Maintenance, Test & Measurement, Calibration
As EXAIR and BETE continue to build on a strong partnership, EXAIR has recently added a selection of BETE products to the site, including the innovative BETE HydroClaw tank and vessel cleaning nozzle.
Read more...Clog-resistant nozzle for powerful
Maintenance, Test & Measurement, Calibration
As EXAIR and BETE continue to build on a strong partnership, EXAIR has recently added a selection of BETE products to the site, including the innovative BETE HydroClaw tank and vessel cleaning nozzle.
Read more...Why your next oscilloscope should Comtest
Maintenance, Test & Measurement, Calibration
The PC-based USB oscilloscope is a cutting-edge, adaptable alternative to traditional benchtop oscilloscopes that’s redefining test and measurement.
Read more...Automated test and measurement Comtest
Maintenance, Test & Measurement, Calibration
Comtest, in partnership with global brands, provides customised solutions with integrated hardware and software for efficient testing and data collection.
Read more...Advanced field calibrator and communicator
Maintenance, Test & Measurement, Calibration
The Beamex MC6 is a high-accuracy field calibrator that offers automatic calibration capabilities for pressure, temperature and various electrical signals.
Read more...Inline particle measurement Mecosa
Maintenance, Test & Measurement, Calibration
Part of the SOPAT family, Parsum has for more than 20 years stood for the measurement of particles in a running process - without sampling and without a laboratory.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version