Nivus OCM PRO CF, Инструкция по эксплуатации

Страница: 162 / 194

Instruction manual
OCM Pro CF
page 162 OCM Pro CF - Rev. 09 as of 07.06.2016
®
11 Troubleshooting
Error Possible reason Correction
No indication of flow
(>0< or >----<) Connection Check connection between sensor cable and
terminal strip. Check connection boxes, connections
for sensor cable extension or air compensation
element for correct connection or moisture.
Sensor Check sensor installation (towards flow direction,
horizontal installation)
Check sensor for soiling, sedimentation, silting (
à
to
be removed) or mechanical damage or sensor body
and cable (
à
replace sensor).
Flow level
measurement
Important: no flow level
à
no flow velocity
measurement possible!!
In case of water-ultrasonic measurement: check
sensor for horizontal installation.
Check sensor function in menu >I/O - Sensors -
H-Sensor >echo profile<.
In case of external level measurement: check
external transmitter for function and signal
transmission (cables, clamp connections, short
circuits, contact resistances).
In case of measurement with pressure cell: check
compensation channel at sensor body for
obstructions.
Flow level > 65 mm (if using sensor type CS2:
150 mm? Type DSM >30 mm?)? In this case the
OCM Pro is in Q/H measurement mode at initial
start-up. Enter the velocity prevailing at a level of
65/150/30 mm manually in parameter CAL – Flow
vel. – Velocity h_crit. This must be done only once.
Check level measurement parameter "Fixed value“
in case of measuring in full channel without using
level measurement.
Transmitter Call up error memory. Depending on error
messages take the respective measures (check
cables, plug and socket connections, sensor
installation).
If >CPU Error< is indicated consult NIVUS service
personnel. Investigate the moment of failure in menu
RUN – Trend.
Negative flow direction Check installation direction of the sensor, rotate
sensor if required.
If the flow direction is reversed only occasionally and
the measurement fails subsequently
à
set min.
value to –1.0m/s in menu CAL-Flow vel. – min. +
max. value.
Programming Completely check the transmitter parameter
settings.