Testing The Intrinsic Safe Barrier - Wayne Vista Series Service

B.7.1.

Testing the Intrinsic Safe Barrier

In order to test the intrinsic safe barrier perform the following steps (see
Figure B-28):
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FIGURE B-28. TESTING THE INTRINSIC SAFE BARRIER BOARD
November 1992
Remove the black cover which conceals the intrinsic safe barrier in the
head of the dispenser.
Set your meter on DC voltage on the 20 volt scale.
Push your common meter lead into any of the pins which are identified as
common (see Figures B-25 through B-27) and the positive lead into the
position to be tested.
You should read +4.8 to 5.2 VDC, if you read less than this the intrinsic
safe barrier is defective and should be replaced.
Part No. 917543 Rev. A
125