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PEM CWT, Instructions For Use Manual

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PEM CWT Instructions For Use Manual Download Page 1

 

 

 

 
 

ROGOWSKI CURRENT WAVEFORM TRANSDUCERS 

 
 
 
 
 
 
 

INSTRUCTIONS FOR USE 

 

CWT 

 

 
 
 
 

 

 
 
 

 

POWER ELECTRONIC MEASUREMENTS Ltd. 

 

Tel:  +44 115 946 9657 • Fax:  +44 115 946 8515 

Email: [email protected] 

• Web: www.pemuk.com 

 

February 2011 

Distributed By:  

9

5

5 Industrial Road, San Carlos, CA, 94070 USA 

GMW Associates  

PHONE: +1 650-802-8292  FAX: +1 650-802-8298     EMAIL: [email protected] 

WEB: www.gmw.com

Summary of Contents for CWT

Page 1: ...ELECTRONIC MEASUREMENTS Ltd Tel 44 115 946 9657 Fax 44 115 946 8515 Email info pemuk com Web www pemuk com February 2011 Distributed By 955 Industrial Road San Carlos CA 94070 USA GMW Associates PHONE 1 650 802 8292 FAX 1 650 802 8298 EMAIL sales gmw com WEB www gmw com ...

Page 2: ... present the batteries are inoperative Battery type 4 four 1 5V AA alkali Battery life 70 hrs typ DC socket type 2 1 or 2 5mm jack socket polarity indicated on front of CWT DC voltage 12V 10 to 24V 10 DC quiescent supply current 30mA 12V DC 30mA 24V DC When specified with rechargeable batteries the CWT operates directly from the batteries when there is no DC supply present and is powered directly ...

Page 3: ...m for closing the Rogowski coil 4 Cable connecting the Rogowski coil to the integrator electronics 5 Socket for external DC supply 6 LED status indicator for external 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 ...

Page 4: ...e at 15kVrms using a 50Hz sinewave Coils are tested without the 10kV sleeve fitted The test also covers the ferrule connecting the coil to the cable 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 ...

Page 5: ... to vibration the locking nut should be engaged as shown in the diagram below To lock the jaws The locking mechanism must not be actuated at temperatures below 0o C 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 ...

Page 6: ...are delivering less than 2V and must be replaced by removing the sliding battery door in the back cover of the integrator enclosure The units can also be powered by an external DC supply The DC voltage can be between 12V 10 and 24V 10 When the DC supply is present a RED indicating LED adjacent to the socket is illuminated With the DC supply present the batteries are inoperative OR Re chargeable ba...

Page 7: ...ncy oscillations in the MHz range then measurement error can arise due to capacitive coupling to the coil 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 EMC EMISSIONS PEM ...

Page 8: ...of repair or replacement 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 PEM will not accept units sent for recalibra...

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