Diagnostics and troubleshooting Ceraphant PTP31B, PTP33B
42 Endress+Hauser
Diagnostic event Cause Corrective measure
Code Description
Current output not
connected
Current output not connected • Connect current output with load.
• If the current output is not required, switch the
current output off via the configuration.
S971 Measured value is outside
sensor range
The current is outside the permitted range
from 3.8 to 20.5 mA.
The present pressure value is outside the
configured measuring range (but within the
sensor range, if applicable).
Operate the device within the set span
1) Without a corrective measure, the warning messages are available after device restart with a relative pressure device >URL + 10% or < LRL + 5%
and with an absolute pressure device> URL + 10% or < LRL.
2) The switch outputs are opened and the current output adopts the configured alarm current. Errors concerning the switch output are not displayed
because the switch output is in a safe state.
3) The device outputs an error current of 0 mA in the event of an internal communication error. In all other cases, the device returns the configured
error current.
4) The device can be subjected to a total maximum load current of 500 mA at the switch outputs. This load can be distributed asymmetrically
between the two outputs.
9.3 Behavior of the device in the event of a fault
The device displays warnings and faults on the local display and indicates them via the
status LEDs. All the device warnings and faults are for information purposes only and do
not have a safety function. The errors diagnosed by the device are shown on the local
display in accordance with NE107. In accordance with the diagnostic message, the device
behaves as per a warning or fault condition. It is necessary to distinguish between the
following types of errors here:
• Warning:
– The device continues measuring if this type of error occurs. The output signal is not
affected (exception: simulation is active).
– The local display alternates between the warning and the main measured value.
– The switch outputs remain in the state defined by the switch points.
– Status LED flashes red.
– The background remains white in the event of a warning
• Fault:
– The device does not continue measuring if this type of error occurs. The output signal
adopts its fault state (value in the event of an error - see the following section).
– The fault state is indicated on the local display.
– The switch outputs assume the "opened" state.
– For the analog output option, an error is signaled with the configured alarm current
behavior.
9.4 Response of output to errors
The response of the output to error is regulated in accordance with NAMUR NE43.
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