Emerson Micro Motion 9739 MVD

Troubleshooting
10.6Milliampoutputproblems
Table10-6Milliampoutputproblemsandrecommendedactions
ProblemPossiblecausesRecommendedactions
NomAoutput
•Wiringproblem
•Circuitfailure
•Checkthepowersupplyandpower
supplywiring.SeeSection10.9.
•ChecktheFaultActionsettings.See
Section10.18.
•MeasureDCvoltageacrossoutput
terminalstoverifythattheoutputis
active.
•CheckthemAoutputwiring.
•ContactMicroMotion.
Looptestfailed
•Powersupplyproblem
•Incorrectinternal/externalpower
conguration
•Outputnotpowered
•Wiringproblem
•Circuitfailure
•Checkthepowersupplyandpower
supplywiring.SeeSection10.9.
•ChecktheFaultActionsettings.See
Section10.18.
•CheckthemAoutputwiring.
•ContactMicroMotion.
mAoutputbelow4
mA
•ProcessconditionbelowLRV
•LRVandURVarenotsetcorrectly
•Faultconditioniffaultindicatorissetto
internalzeroordownscale
•Openinwiring
•BadmAreceivingdevice
•Badoutputcircuit
•Verifyprocessconditions.
•CheckthesettingsofUpperRangeValue
andLowerRangeValue.SeeSection
10.17.
•ChecktheFaultActionsettings.See
Section10.18.
•Verifythatthereceivingdevice,and
thewiringbetweenthetransmitterand
thereceivingdevice
ConstantmAoutput
•Non-zeroHARTaddress(mAoutput1)
•Outputisxedintextmode
•Zerocalibrationfailure
•ChecktheHARTaddressandLoop
CurrentMode.SeeSection10.14,
•Checkthelooptestmode.
•CheckHARTburstmodeconguration.
SeeSection10.15.
•Ifrelatedtoazerocalibrationfailure,
cyclepowertothemeterandretrythe
zeroingprocedure.
mAoutput
consistentlyoutof
range
•Faultconditioniffaultindicatorissetto
upscaleordownscale
•LRVandURVarenotsetcorrectly
•ChecktheFaultActionsettings.See
Section10.18.
•CheckthesettingsofUpperRangeValue
andLowerRangeValue.SeeSection
10.17.
188
MicroMotion9739MVDTransmitters