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WE-7 Operating Instructions 

3

The cover is designed to fit best into the cast groove with the wide side to the 
right (as illustrated) of the Yoke body.  Furthermore, the feeler button, on the 
raised portion of the switch cover is farthest away from the switch connections.  
To insert the Switch Cover, bend the cover longitudinally, and slip the top

 

of the cover into the grove.  Use a small screwdriver to 

help

 the bottom of the 

cover into the groove after the top is in place.  During factory assembly, the cover 
is slightly lubricated/moistened.  Ensure the lubricant does not dry, and create a 
vacuum in the Switch Cavity, which causes the Switch to stick.  

 

3.  Field Selection –

 The WE-7 provides the operator with either an AC or DC 

      Field, simply by changing the position of the AC/DC switch on the Control Panel.   
      While in DC mode, the Field Intensity is Infinitely Variable, with the use of the  
      Intensity Knob, which is also located on the Control Panel.  An illustration of the   
      Control Panel is show bellow.

 

 

DO NOT CHANGE THE FIELD WITH THE PUSH BUTTON DEPRESSED  

 

                                      

 

 

 

 

Mounted to the rear of the Control Panel, and inside the Junction End Cap, are 
the Control Board and Heat Sink.  To remove the Control Panel and Junction 
End Cap, Fasteners #1 and #2 are the only ones to be removed.  The Control 
Printed Circuit Board directs AC voltage directly into the Yoke’s Coil (AC Mode) 
or Converts it to DC and again directs it into the Coil (DC Mode).  The DC 
Intensity Controls are contained on the same Printed Circuit Board, and adjusts 
the DC Voltage and thus the lifting power of the Yoke. 

 

Adjusting the DC Intensity Knob while the Yoke is activated is completely 
acceptable.  However, the Field Selection Switch (AC/DC) should not be touched  

DC Intensity Knob 

AC –  Position 

DC –  Position

Junction End Cap 

Identification 

Information 

Power Cord & 
Strain Relief

Fastener #1 

Fastener #2  

 

Summary of Contents for WE-7

Page 1: ...509 Township Road 543 Phone 780 459 6720 Sturgeon County Alberta Fax 780 459 7837 T8T 1M1 E mail info westerninstruments com Web www westerninstruments com Operating Instructions WE 7 Compact AC DC Yo...

Page 2: ...y While depressed the switch delivers power AC to the coil encapsulated in the Yoke housing Review the instructions in this guide for switch replacement 2 Slip In Switch Cover The Slip In Switch Cover...

Page 3: ...he Field Intensity is Infinitely Variable with the use of the Intensity Knob which is also located on the Control Panel An illustration of the Control Panel is show bellow DO NOT CHANGE THE FIELD WITH...

Page 4: ...operation the unit can be operated for extended periods of time however the Yoke housing may get to warm to hold If the Yoke is used for prolonged periods of time of continuous cycling such as 2 to 3...

Page 5: ...ection when Fluorescent Particles are used Indications found with Dry Powder and an AC Field will tend to form immediately and will take slightly longer with Wet Method Particles While using a DC Fiel...

Page 6: ...e Neutral Black Live Care must be taken to insure the proper installation of an AC Power Plug and if there is any question contact your distributor or Western Instruments If an AC Plug in not installe...

Page 7: ...ore we recommend instructional training to CGSB ASNT or other regulatory authority qualifications Western Instruments highly recommends the end user exercise all possible safety precautions including...

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