Honeywell SmartLine Multivariable SMV800 Series User Manual page 262

Flow Sqrt of
Neg
Flow
Direction
Flow SP/PT
Comp
Totalizer
Reached Max.
Value
250
SqRt of Negative/
Flow bad / Totalizer
bad
Reverse Flow
Flow Bad SP/PT
Compensation
SMV800 Transmitter User's Manual
During setup and configuration of the flow
algorithm parameters, insufficient
configuration or invalid parameter values
have been entered which are causing a
square root of a negative value math error in
the flow calculation
Resolution:
Carefully review the flow algorithm parameter
values that have been configured. Correct
any errors. When the flow is showing a good
value and this status is cleared, reset the
device to clear any Critical Status that may
have been generated due to the bad flow
calculation.
The flow calculation is producing a negative
flow value indicating that the flow is reversed
in the element. Note that if reverse flow is
expected, the Reverse Flow Calculation
option must be selected in the Flow Setup,
otherwise any reverse flow detected will
produce a flow value of zero.
Note that, for some Primary Elements and
Algorithm Standards, Reverse Flow may not
be applicable. In this case, flow value will be
zero regardless of the Reverse Flow
Calculation option.
Resolution:
If reverse flow is not expected, review the
flow algorithm parameter values that have
been configured and correct any errors.
One or both Static Pressure or Process
Temperature inputs has failed such that
these inputs to the flow calculation are
undetermined. If SP and/or PT
Compensation have been disabled in
configuration of the Flow algorithm, this will
have no effect on the flow calculation.
Otherwise the flow value will be determined
by the AP and/or PT Failsafe configuration.
With Failsafe OFF, the calculation will use
the configured nominal or design value for
the failed input. With Failsafe ON, the flow
calculation will fail and a Critical Status will
be generated.
Resolution:
Check for the cause of the failed input. After
repairing the failure, reset the device if
required.
The Totalizer count has reached the user
configured Maximum Totalizer Value. The
status will stay set for the Totalizer Status
Latency period, at which time it will be
cleared.
Revision 6.0