PRF-911 Concentric Ring
6
3. Black banana receptacle in the fixture housing allows direct connection to the
OUTER RING electrode, designated D
2
.
B. Laminated PTB-920 Dual Test Bed
1. The upper Acrylic insulated surface is
employed during surface resistance
measurements in accordance with ESD
STM 11.11-2001
2. The lower metal surface is equipped with a
standard banana receptacle and is
employed when making volume resistivity
measurements as generally described in
ESD STM 11.12-2000.
C. Inspection of the PRF-911 Concentric Ring Figure 3 Dual Test Bed Fixture
1. Before inspecting the PRF-911 Concentric Ring, confirm the calibration of your
resistance instrument. Performing low Resistance Calibration on the Prostat PRS-
801 and PRS-812 Resistance Instruments.
1. Insert Reference Shunt
2. Select Ohms Mode by pressing “Mode” once
3. Press Test to measure shunt. Indication should be 1.02
Ω
+/- 0.002
Ω
4. Press Reset to enter data in memory
5. Press Reset and Clear within ½ second. The display should indicate CAL
6. Press Reset to adjust instrument to reference shunt
7. Press Test to confirm 1.02
Ω
+/- 0.02
Ω
2. Carefully install BNC/Dual Banana adapter on the fixture BNC connector. Note
that the connection is a bayonet type.
Figure 2: BNC adapter and connection
Figure 3: Dual Test Bed
Summary of Contents for PRF-911
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