Page 240 SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS A5E33329501
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Troubleshooting
Symptom Cause Action
Incorrect reading (mA
output and/or dis-
played value)
mA function not assigned to
correct measurement
Check mA assignment. See Cur-
rent Output Function (2.5.1.) on
page 144.
When device configured for
flow: exponent or breakpoint
not correctly selected
Check configuration: if
2.1.2. Sen-
sor Mode
set to FLOW, verify cor-
rect exponent [Flow Exponent
(2.15.3.2.) on page 192] and break-
points [Universal Head vs. Flow
(2.15.5.) on page 198].
Incorrect vessel or PMD dimen-
sions
For volume application: Verify ves-
sel dimensions. See Vessel Shape
(2.6.1.) on page 147.
For flow application: Verify PMD
dimensions. See PMD Dimen-
sions (2.15.4.) on page 195
Relay not activating Relay not programmed Program relay.
Relay incorrectly assigned Verify with simulation. See Simu-
lation (3.4.) on page 215.
Incorrect relay function
selected
Verify with simulation. See Simu-
lation (3.4.) on page 215.
Incorrect relay setpoints Verify setpoints.
Relay not activating
correctly
Relay incorrectly assigned Verify with simulation. See Simu-
lation (3.4.) on page 215.
Incorrect relay function
selected
Verify with simulation. See Simu-
lation (3.4.) on page 215.
Incorrect relay setpoints Verify setpoints.
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