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ROGOWSKI CURRENT WAVEFORM TRANSDUCERS
INSTRUCTIONS FOR USE
Distributed By:
GMW Associates
POWER ELECTRONIC MEASUREMENTS Ltd.
955 Industrial Road, San Carlos, CA, 94070 USA
PHONE: +1 650-802-8292
Tel: +44 115 946 9657 • Fax: +44 115 946 8515
Email: info@pemuk.com • Web: www.pemuk.com
CWT
FAX: +1 650-802-8298
EMAIL: sales@gmw.com
WEB: www.gmw.com
February 2011
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Summary of Contents for PEM CWT
- Page 1 ROGOWSKI CURRENT WAVEFORM TRANSDUCERS INSTRUCTIONS FOR USE Distributed By: 955 Industrial Road, San Carlos, CA, 94070 USA PHONE: +1 650-802-8292 FAX: +1 650-802-8298 EMAIL: sales@gmw.com WEB: www.gmw.com GMW Associates POWER ELECTRONIC MEASUREMENTS Ltd. Tel: +44 115 946 9657 • Fax: +44 115 946 8515 Email: info@pemuk.com •...
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Page 2: Specification
(see „Obtaining The Best Measurement‟) Linearity: ±0.05% typ. POWER SUPPLY The CWT can be powered by both battery and an external DC voltage. With the external DC supply present the batteries are inoperative. Battery type: 4 (four) 1.5V AA alkali Battery life: 70 hrs typ. - Page 3 DC supply 7. Enclosure for the integrator electronics 8. Output BNC socket 9. 4 x AA batteries 10. LED indicator - GREEN - CWT is ON - RED – low battery 11. Push button ON / OFF switch February 2011...
- Page 4 For additional safety it is recommended that the ferrule is not situated in direct contact with conductors at voltages higher than 8kV peak. See also “Obtaining the Best Measurement”. The voltage ratings are appropriate for intermittent use of the CWT as a test instrument and not for continuous use in a permanent installation.
- Page 5 The locking mechanism must not be actuated at temperatures below 0 Care must be taken not to over-tighten the locking nut. THE INTEGRATOR The CWT must only be used with oscilloscopes or monitoring equipment which have their BNC INPUTS PROPERLY GROUNDED. February 2011...
- Page 6 4. Re-energise the conductor. 5. The CWT is switched ON by pressing and releasing the ON push button, and is turned OFF by depressing the button fully; the LED indicates that the CWT is ON when the LED is GREEN.
- Page 7 As a check on any unwanted response to adjacent fields, it is wise to display the output of the CWT when close to (but not encircling) the conductor whose current is to be measured. This will reveal the magnitude of any unwanted response to currents close to but outside the coil.
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Page 8: Warranty
RETURNING CWTs FOR RECALIBRATION OR REPAIR If it is necessary to return the CWT to PEM for repair whether or not under warranty please contact PEM in advance for shipping instructions (see below for contact details). To facilitate customs clearance it is important to follow the correct procedure otherwise import tax will be charged.