Rosemount Model 8732C Integral Mount Magnetic Flowmeter System
3-6
DIAGNOSTIC MESSAGES
The following error messages appear on the LOI screen when a diagnostic
error is detected. To correct the problem, complete the steps as indicated. If
the problem persists, contact your sales or service representative.
TABLE 3-2. LOI Display and Functions.
LOI Display Transmitter Function
Display Setup Display Lock ................... Locks out configuration changes (including totalizer start/stop/reset) from being made
via the LOI. A DL indicator will show on the main flow rate screen. All values can still
be viewed.
Flow Rate Display........... User-selected settings for transmitter flow indication:
Flow-% Span, Flow-Totalize, %Span-Totalize.
Totalize Display............... User-selected settings for transmitter totalizer indication:
Forward-Reverse, Net-Gross.
Basic Setup Units:...................................Specifies the desired units: Gal/Min, Lit/Min, IG/Min, CuM/Hr, Ft/Sec, M/Sec, Lit/sec, Special.
Tube Size........................ Specifies the flowtube size (0.15 through 60 inches) and identifies the corresponding
maximum flow.
Tube Cal No.................... Identifies the flowtube calibration number.
URV, LRV........................ Sets the desired 20 mA (Upper Range Value) and 4 mA (Lower Range Value) points.
Flowtube size must be set first.
Damping ......................... Sets response time, in seconds, to a step change in flow.
Detailed Set-up Lo-Flow Cutoff................. Determines the flow rate at which the transmitter indicates an output of zero flow
and 4 mA.
Dig Out Config ................ Selects pulse or auxiliary outputs, set pulse scaling and width, and select an auxiliary
output (zero or reverse flow).
Special Units................... Specifies input base unit, conversion, and time base for special units.
Coil Frequency................ Specifies coil drive frequency of 6 or 30 Hz.
Sig Processing................ Specifies signal processing status (on/off) and sets signal processing parameters.
Transmitter Test XMTR Test ...................... Performs a test of the transmitter electronics.
Loop Test ........................ Drives the transmitter analog output to a user-specified value.
Pulse Test ....................... Drives the transmitter digital output to a user-specified value.
Transmitter Trim 4–20 mA Trim ................. Adjusts the 4–20 mA Output.
Auto Zero ........................ Performs flowtube zero for 30 Hz operation.
Gain Trim ........................ Performs a calibration of the transmitter.
Device Information Permits viewing and changing useful information about the transmitter and flowtube.
TABLE 3-3. LOI Error Messages.
Symptom Potential Cause Corrective Action
“Empty Pipe” displayed Empty pipe. None. Message will clear when pipe is full.
Electrode failure. Perform flowtube tests C and D on page 5-5.
Conductivity less than 5 mmho per cm. Increase conductivity to ≥ 5 mmho per cm.
“Coil Open Ckt” displayed. Damaged coils. Check flowtube coils. Perform flowtube
Test A–Flowtube Coil on page 5-5.
Electronics failure. Replace Model 8732C electronics.
Flowtube will not Autozero
(“Autozero Failure” can be cleared by cycling power).
Flow is not set to zero. Force flow to zero, re-perform autozero.
LOI is blank. Model 8732C is ranged improperly. Correct ranging with HART-based Communicator.
LOI failure. Replace LOI.
Electronics failure. Replace electronics.
LOI blinks, scrolls, or displays scrambled letters. Unit experienced large transient. Recycle power. If problem persists replace electronics.
LOI does not respond to key press. LOI failure. Replace LOI. Use the HART Communicator
in the interim.
Electronics failure. Replace the electronics.
LOI Glass is dirty. Clean the LOI glass.
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