Accusonic 8510+ series Reference Manual
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Contents
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Unpacking and Installation 4-5cables. Contact Accusonic if any transducer measures less than 20 M resistance (lower resistance valuesmay be acceptable depending on site conditions). If the transducer and cable assemblies test infinite,proceed to Step 3.Step 2 - Verify That There are No Internal Shorts in Any TransducerTest transducer resistance at the transducer, with the cabling detached, if possible. This can usually beperformed easily when the transducers are feedthrough type, where the outside of the pipe is accessible,and when the transducers are fitted with E/O connectors. Use a short test cable attached to the transducer’sE/O connector and measure the resistance across the E/O conductors and each conductor to ground ifpossible.When the transducer is not accessible, or when the cable is permanently attached to the unit, you will not beable to test the transducer alone. If there is a junction box between the flowmeter and transducers, then testthe resistance at the junction box by disconnecting the cable running to the transducers from the terminalblock. Follow the instructions from Step 1 to test.This step will isolate the poor readings to either the cable or the transducer.Step 3 - Verify Continuity and Cable Identification.Work from either end of the cable and use a partner to connect pairs together, one at a time, at the far endof the cable. For each coaxial cable, short the connector to shield and measure continuity. For each twin-axial cable, short each connector to shield and measure continuity.The transducers are now ready to be terminated to the flowmeter.Connecting Transducer CablingAfter verifying that all transducer cabling is sound, connect each line to the appropriate terminal on theflowmeter console, as shown in Figures 4-4A or 4-4B.Coaxial Cable (Unbalanced Cables)Connect cables as shown in figure 4-4AConfigure jumpers for on Path-Selector Backplane as shown in figure 4-4A. |
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