Part 2

4.54 Plug-In Assembly ConfigurationOne way to reduce undesirable offsets due to gauge leakage is to use a WagnerGround as shown in Figure 122. The Wagner Ground uses a guard shield whosevoltage is approximately the same as the signal leads (excitation voltage).The Wagner Ground is formed by dividing the excitation supply in half by using twoequal value resistors. This ground is connected to the shield lead to establish avoltage reference. To check the Wagner Ground, close relay B4. The measuredvoltage should be within + 4% of one-half the excitation voltage.WAGNER GND.SY IELDVexSHIELD CONNECTEDTO DEVICE UNDERTEST IF IT I S4 CONDUCTORovnFigure 122.Options 0701071 - Wagner GroundArtisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com