COSA Xentaur Xentaur HDT - Manual (Page 24)

Section 3: Instrument
page 17
Various strategies for interfacing with the HDT are shown
in Appendix D.
Please observe good electrical safety and grounding prac-
tices when connecting any electrical equipment; connecting
one end (e.g. negative) of the power supply to earth ground
is advisable.
After the installation is complete, proper detection by the
user’s equipment of the 4-20mA output, may be verified by
confirming the measurements in the first few seconds after
power up refer to Appendix A.
3.4 Operating the Instrument
3.4.1 Starting up
The instrument is ready for use as soon as the power cable is
installed. When power is applied the instrument will initial-
ize its program refer to timing diagrams in Appendices A &
B, then it will enter the Operating State.
3.4.2 HART Interface
The HDT is HART compliant. The Serial Num on the HDT
body is its HART address. The HDT implements the full
Common Command Set in addition to commands xxxx. The
full HART specification is available from the HART Com-
munication Foundation at http://www.hartcomm.org/.
3.5 Troubleshooting the Instrument
This instrument performs diagnostic tests on power up as
well as once every three seconds. The table that follows,
depicts possible error/unexpected indications that may
occur. For each indication the table has explanations for the
reason, and if necessary a suggested action to remedy it.