Trouble-shooting Proline Promass 83 PROFIBUS DP/PA
134 Endress+Hauser
700 P EMPTY PIPE
! # 700
0x53 UNCERTAIN Sensor
conversion
not accurate
(measured
value from
sensor not
accurate)
Constant Empty pipe
detected
Cause:
The process fluid density is outside the upper or lower
limit values set for empty pipe detection.
Causes:
Air in the measuring tube
Partly filled measuring tube
Remedy:
Ensure that there is no gas content in the process liquid.
Adjust the upper or lower limit value for empty pipe
detection to the current process conditions.
PROFIBUS (Commuwin II):
manufacturer-specific Transducer Block Æ device
matrix (V3H5) EPD VALUE LOW
(V3H6) EPD VALUE HIGH
Local display:
BASIC FUNCTIONS Æ PROCESS PARAMETER Æ EPD
PARAMETER Æ EPD VALUE LOW or EPD VALUE
HIGH
701 P EXC. CURR. LIM.
! # 701
0x40
0x41
0x42
UNCERTAIN Non specific
(uncertain
status)
O.K.
Low
High
Excitation too
high
Cause:
The maximum current value for the measuring tube
exciter coils has been reached, since certain process
fluid characteristics are extreme, e.g. high gas or solid
content.
The instrument continues to work correctly.
Remedy:
In particular with outgassing fluids and/or increased gas
content, the following measures are recommended to
increase system pressure:
Install the instrument at the outlet side of a pump.
Install the instrument at the lowest point of an
ascending pipeline.
Install a flow restriction, e.g. reducer or orifice plate,
downstream from the instrument.
702 P MEDIUM INHOM.
! # 702
0x43 UNCERTAIN Non specific
(uncertain
status)
Constant Fluid
inhomogeneous
Cause:
Frequency control is not stable, due to inhomogeneous
process fluid, e.g. gas or solid content.
Remedy:
In particular with outgassing fluids and/or increased gas
content, the following measures are recommended to
increase system pressure:
Install the instrument at the outlet side of a pump.
Install the instrument at the lowest point of an
ascending pipeline.
Install a flow restriction, e.g. reducer or orifice plate,
downstream from the instrument.
703 P NOISE LIM. CH0
! # 703
0x40
0x41
0x42
UNCERTAIN Non specific
(uncertain
status)
O.K.
Low
High
Noise Limit
Channel 0
Cause:
Overdriving of the internal analog to digital converter.
Causes:
Cavitation
Extreme pressure pulses
High gas flow velocity
A continuation of the measurement is still possible!
Remedy:
Change or improve process conditions, e.g. by reducing
the flow velocity.
704 P NOISE LIM. CH1
! # 704
0x40
0x41
0x42
UNCERTAIN Non specific
(uncertain
status)
O.K.
Low
High
Noise Limit
Channel 1
No. Device status message
(local display)
PROFIBUS measured value status Adv. diagnosis
message in
PROFIBUS
master
Cause/remedy
Quality code (HEX)
Quality status
Quality substatus
Limits
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