Yokogawa FieldMate - Manual (Page 44)

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IM 01R01A11-01EN
6.2.1 “Circuit” check and “Device Status” check
(Verification Tool is in “online” mode)
CAUTION
• “Circuit” check and “Device Status” check temporarily change the parameters of AXF. In
case of unexpected termination, follow 8.2.
• The AXF flowtube should be completely filled with fluid, otherwise the results may be
inadequate.
• These items are run only when Verification Tool is in “online” mode.
• These items are verified for 2 types. Each condition check can be run separately.
(A) “No Flow” condition:
Verifies the condition of the AXF by checking;
- Circuits including the excitation circuit and the magnetic circuit inside the flowtube when
the fluid velocity is completely zero.
- The present and past history of alarms.
(B) “Flow” condition:
Verifies the condition of the AXF by checking;
- Circuits including the excitation circuit and the operation circuit which calculates the flow
velocity when the fluid velocity is sufficient.
- The present and past history of alarms.
• There are 3 combinations:
(1) No Flow
(2) Flow
(3) Flow + No Flow
• The check items of the “Circuit” check depend on the case as follows:
• Nominal size of the unit.
• With or without the optional code ELC (DC Noise Cut Circuit).
• Test condition type; “Flow” or “No Flow”.
For details, see Table 6.2.2.