Endress+Hauser Teqwave T, Руководство по эксплуатации, Страница: 40 / 54

Diagnostics and troubleshooting Teqwave T
40 Hauser
10 Diagnostics and troubleshooting
10.1 General troubleshooting
For the local display
10.2 Error messages
The local display presents errors on the touch screen in text format.
Problem Possible causes Remedial action
Local display is dark. Battery is flat. Charge the battery →  24.
Diagnostic message Description Measures
The concentration could not be
clearly established. Possible causes
include:
– Liquid is not mixed well The measuring device is unable to
identify the concentrate or the mea-
sured concentration varies greatly
during the measuring time. Move the sensor continuously
during the measurement process in
order to obtain a homogeneous dis-
tribution of the liquid.
Too many process disturbances
have been detected. Possible causes
include:
– Bubbles or particles in the liquid
– Bubbles on the surface of the
sensor
Bubbles or particles interfere with
the measurement. Move the sensor continuously
during the measurement process. If
bubbles form on the surface of the
sensor, briefly remove the sensor
from the liquid and then immerse it
in the liquid again.
The temperature calibration range
has been exceeded/undershot. The measuring system is adapted to
the measurement tasks with a con-
centration app. This concentration
app represents a calibration for the
process liquid used and is only valid
within the liquid's calibration range.
Find measuring conditions that are
within the range.
The density calibration range has
been exceeded/undershot.
The calibration range for concentra-
tion 1 has been exceeded/
undershot.
No sensor is connected to the cont-
roller. Please check the connection. Sensor not recognized. Connect the sensor to the transmit-
ter.
The temperature could not be
clearly established. Possible causes:
– The temperature of the sensor
and liquid is not the same
– The temperature of the liquid
changes too quickly
The measuring device cannot deter-
mine the temperature. Move the sensor continuously
during the measurement process in
order to obtain a homogeneous dis-
tribution of the temperature. Avoid
taking measurements near heating
elements in the bath.
No or insufficient liquid in the sen-
sor. Please immerse the sensor in
the liquid. Not enough liquid. Immerse the sensor completely in
the liquid or increase the volume of
the liquid.