PRF-911 Concentric Ring
11
CAUTION
Should the electrode continuity check indicate
improper connection to the electrodes, do not use
the PRF-911 Concentric Ring. Contact PROSTAT
Customer Service Department for further instructions.
7. Confirming Electrode Contact to the Test Bed
Use the following procedure to confirm positive electrode contact with the PTB-920
Test Bed.
a. With the BNC/Dual Banana adapter installed, place the PRF-911 fixture
on the PTB-920 METAL test surface with the electrodes making contact
with the test bed surface.
b. Connect one PRS-801 or PRS-812 Resistance Meter test lead to the center
INNER RING electrode (D
1
) BNC adapter receptacle (RED)
c. Connect the second PRS-801 or PRS-812 Resistance Meter test lead to the
metal test bed banana receptacle.
d. Place one five pound NFPA electrode on the PRF-911 fixture housing;
(1) NOTE the compression of the center electrode spring assembly
(2) Visually confirm that the outer electrode makes direct contact
with the metal test bed
Figure 8: Confirming Electrode Contact to Test Bed
Summary of Contents for PRF-911
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