MSA Senscient ELDS 1000 series, Руководство по эксплуатации

Страница: 94 / 184

Installation & Commissioning
94
Senscient ELDS™
Rev 15
GB
IF there is no signal reaching the Receiver, a screen similar to that shown below will be displayed:
In order to continue with the commissioning process, the cause of the ‘No Signal’ problem must be
identified and corrected. The most likely causes for ‘No Signal’ are listed below, along with the
appropriate actions to remedy such problems:

Beam Blocked – There is something in the beam-path which is completely blocking the beam-
path between the Transmitter and the Receiver. Remove whatever is blocking the beam-path
or relocate the system to somewhere where a clear line of sight can be obtained between the
TX and RX units.

System Not Aligned – The Transmitter or Receiver have not been aligned with respect to
each other, or are so far from correct alignment that very little or no signal is reaching the
Receiver. Use the alignment telescope and the procedure described in section 4.3 to correctly
align the Transmitter and Receiver units with respect to each other.

No TX Power – The Transmitter is not receiving the +24V (nominal) power supply voltage that
it requires to operate. Use a multimeter to check that the +24V supply is reaching the TX unit.
The voltage measured at the unit should be b18V and +32V. If the voltage is outside
of this range, correct the electrical installation to supply the unit with the specified power and
voltage.

TX Fault – There is a fault condition preventing the Transmitter from producing the expected
output. Connect to the Transmitter unit using SITE and review the information available via the
Event Log and Diagnostics menu options to determine the cause of the TX Fault.
Once the SITE software displays the green
Signal OK
screen you are ready to proceed to the
next step in the commissioning process.