Air Monitor Corporation AMC POWER VELTRON DPT, Инструкция по установке, эксплуатации и обслуживанию

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VELTRON DPT
Air Monitor Corporation
116-009-70.P65 (09/18/09)
VELTRON DPT - IO&M Manual 15
8 – TROUBLESHOOTING
SECTION 8 – TROUBLESHOOTING
Personnel should be familiar with the operation of the VELTRON DPT before performing any troubleshooting.
Problem
No output and no display (if
so equipped).
Output is present, but no
display.
Output and display do not
change with change in
process input.
Solution
– Verify input power connections (see Figure 4.5).
– Verify input power is present and between 14-40VDC.
– Replace Power Supply Board.
– Replaced LCD Display Board.
– Verify pressure signal lines are connected correctly.
– Verify differential pressure at input fittings.
– Verify internal signal tubing was not blown off transducer by excessive pressure (see
drawings in Section 9).
– Using a DMM set for DC voltage, measure between TP0-GND (black) and pin 4-XDCR of
P2 on Terminal Board (see Figure 4.5).
With full positive differential pressure applied, DMM should read 0.7 ± 0.3VDC.
If DMM does not read 0.7 ± 0.3VDC, replaced Transducer Board.
If DMM reads correctly, measure DC voltage between TP0-GND (black) and TP1-XMIT
(brown) on Terminal Board.
With full differential pressure still applied, DMM should read 0.7 ± 0.3VDC.
If DMM does not read 0.7 ± 0.3VDC, replace Terminal Board.
If DMM reads correctly, measure DC voltage between TP0-GND (black) and Pin 5-XMIT2 of
P2 on Terminal Board (see Figure 4.5).
With full differential pressure still applied, DMM should read 0.7 ± 0.3VDC.
If DMM does not read 0.7 ± 0.3VDC, replace Power Supply Board.
If DMM reads correctly, replace Terminal Board.
If after following the Troubleshooting steps the VELTRON DPT continues to operate improperly,
contact the Service Department for further assistance (see Section 10).