Process Error Messages - Endress+Hauser Proline Prosonic Flow 90 Operating Instructions Manual

9 Trouble-shooting
!
84
9.3

Process error messages

Process errors can be defined as either "Fault" or "Notice" messages and can thereby be weighted
differently. Determination of this is done via the function matrix
(→ see the "Description of Device Functions" manual).
Note!
The error types listed in the following correspond to the factory settings.
Also observe the information on Page 47 ff. and 86.
Type Error message / No.
P = Process error
$
= Fault message (with an effect on the inputs and outputs)
! = Notice message (without an effect on the inputs and outputs)
P PIPE DATA
$
# 468
P S.VELOC. RANGE
$
# 491
P INTERFERENCE
! # 494
Cause
The inner diameter is negative.
The sound velocity is outside the
search range of the transmitter.
The pipe transmitted wave may super-
pose the signal. We recommend you
alter the sensor configuration in the
event of this error message.
"
Caution!
A change of the sensor configuration
is required if the measuring device
indicates zero or low flow.
Proline Prosonic Flow 90
Remedy
In the function group PIPE DATA
check the values of the functions
CIRCUMFERENCE and WALL
THICKNESS resp. LINER THICK-
NESS.
– Check the installation dimensions.
– If possible, check the sound veloc-
ity of the fluid or check the special-
ist literature.
If the actual sound velocity is outside
the defined search range, the corre-
sponding parameters must be changed
in the LIQUID DATA function group.
Detailed information on this topic is
provided in the Description of Device
Functions Prosonic Flow 90
(BA069D/06/en) manual under the
SOUND VELOCITY LIQUID function.
– In the SENSOR CONFIGURATION
function, change the number of
traverses from 2 or 4 to 1 or 3 and
mount the sensors accordingly.
Endress+Hauser