Revision 1
STT700 Series HART/DE Option User’s Manual
Page 101
Non-Critical
Diagnostics
Description
More Details ( Cause and Resolution )
CT Out of Range
MCU temperature of
the device is out of
range
Core Temperature Out Of Range (-36C to 112.5C).
If it is certain that the reading is in error, then contact your
vendor.
No Factory
Calibration
Factory Calibration
data is not available,
device is not Factory
Calibrated
The transmitter has not been calibrated by the factory.
Contact your vendor.
PV Out of Range
Process value
measured is out of
range
Loop PV is out of configured URV and LRV.
Check your process temperature. Adapt the span.
Check range and, if required, replace transmitter with one that
has a wider range.
CJ Out of Limits
SV Bad
Cold junction sensor
temperature or device
terminal temperature is
out of limits (-40C, 85C
is the range)
The ambient temperature measured is out of the transmitter
specifications
(-40°C to 85°C )
Take steps to isolate the device from the temperature source
Sensor1 excess
LRV correct
Applied input 1 value
and measured value
differ by more than
1.5% span at low
calibration point
This non critical flag will be set when difference between
applied Input 1 LRV value and measured value exceeds 1.5%
of span
Perform Reset correct
Sensor1 excess
URV correct
Applied input 1 value
and measured value
differ by more than
1.5% span at high
calibration point
This non critical flag will be set when difference between
applied Input 1 URV value and measured value exceeds 1.5%
of span
Perform Reset correct
Suspect Input
MCU Reference
voltages are beyond
limits and hence inputs
measured may not be
correct
MCU Reference voltages are beyond limits and hence inputs
measured may not be correct. Replace the sensor based on
Input 1/ Input 2 measurement suspect
Fixed Current
Mode
The 4-20mA loop is put
in fixed current mode
and is not following the
PV value
Output current is fixed and not varying as per input. Loop
current mode is disabled or Loop Test is active.
Enable loop current mode if it is disabled or exit the Loop Test
mode if active, to return to normal operation.
Input1 Fault
Input1 may be
open/short
There is a problem with the Input 1 sensor. Verify sensor
connections and configurations
Input2 Fault
Input2 may be
open/short
There is a problem with the Input 2 sensor. Verify sensor
connections and configurations
Analog
Output Saturated
This status is set when
loop current is set to
out of 4-20 mA
(generally when PV out
of range)
Calculated analog output is either above or below the
specified Loop Current Limits. The transmitter input is not in
specified range. Check the transmitter input
Excess Delta
Detect
Sensor 1 and Sensor2
measured values differ
by more than a user
defined threshold
This will be set when delta value exceeds delta limit. When
Excess Delta Alarm is Disabled, and device is in non-
redundant mode, this status indicates that the difference
between two sensor inputs has crossed the applicable delta
limit
ADC Fault
ADC Reference
voltages are beyond
working correct limits
Controller ADC fault. Replace device if error persists upon
power cycle
