User's Manual

Connecting the logger and installing it on-site
26
The following example shows an electrical circuit with DC power source connected to
the switching input of the loggers. If an alarm is raised by the alarm device (e.g. light
barrier) is activated, the circuit is closed and the switching input is triggered. Depending
on the alarm configuration, one or two of the internal relays are switched in order to
activate / trigger the load connected to the respective switching output (in this case a
signal lamp) and a SMS and / or e-mail can be sent to predefined receivers.
Alarms can also be triggered when the value of a monitored measurement crosses a
predefined threshold. Please refer to the corresponding section for detailed information
on how to configure the threshold monitoring (see page 48).
4.2 Positioning the logger
The logger housing is protected against the ingress of dust and water and, thus,
especially qualified for the operation in pipeline shafts where it can be installed next to
the measuring point.
The logger can be installed in vertical and horizontal position or even upside-down and it
can also be hung up using, e.g., a cable tie.
During field installation the following instructions must be observed, in order to ensure
proper operation of the logger:
• Make sure that all connections to sensors of other peripheral devices are
established in a professional manner and that the connection points are properly
insulated.
• When you plug a connection cable in the respective socket, make sure you feel the
plug latch in. Only proper and positive locking connections provide protection
against ingress of water and ensure error-free data transfer.
• Care shall be taken to ensure that cables and their connections are not subjected to
tensile load.
• Do not hang the logger on its connection cables.
• Do not bend the connection cables.
• Make sure the logger is switched on before you leave the site.
Example of an
alarm loop