Comet U0110G, User Manual

Page: 39 / 73

IE-LGR-UxxxxM-23
39
Problems with measurement correctness ______________
Incorrect measurement values of temperature or relative humidity may,
in most cases, be caused by an unsuitable probe location or improper
methodology. Some notes concerning these problems are mentioned
in
the following chapter
“
Recommendations for operation
and maintenance
”
. In probes using current and voltage outputs
incorrect measurement results may be induced by latent coupling
between individual components, e.g. across supply sources or through
improperly connected cable shielding.
If the device indicates an error condition, see detailed information
in
Annex 1 , selected error messages.
Another problem area relates to random peaks occurring within
the measurement values. Their most frequent reason is a source
of electromagnetic interference situated near the device or
the pertaining cables. Attention must be paid also to possible damaged
portions of the cable insulation. Prevent accidental contacts between
wires and adjacent conductive parts.
Problems arising during communication with a computer __
For communication with a computer a cable should be used that is not
longer than 5 m. Check that all connectors are properly seated. It is
especially the USB-C connector that must be properly pushed into
the receptacle. Cable disconnecting and subsequent connecting
during communication can cause a temporary non-availability
of the USB equipment in the computer. This may be corrected by
closing the
COMET Vision utility program (including the communication
service) and starting it subsequently. Restart the computer, if the above
mentioned measure is not the proper remedy. Check whether new HID
equipment will appear in
Device administrator after the device has
been connected to the computer.
Problems arising during sending SMS messages
with
UxxxxM models ______________________________
There are a lot of problem sources in this connection. If sending text
messages does not work at all, you may try out the following steps:
•
Set an alarm on some of the channels so that it might be induced
easily (e.g. temperature alarm by warming the probe by holding it in
hand, relative humidity alarm by taking the device in hand on
the sensor side) and assign an SMS recipient to this alarm.
•
Induce an alarm condition and follow the behaviour of the blue LED
diode. After switching the modem on the diode should start flashing
fast for a short time (registration in the network), then more slowly
(message sending) to finally go off (finishing).