Performance - Emerson Rosemount Apex Reference Manual

Reference Manual
00809-0100-4731, Rev FA
April 2003
Figure 4-1. APEX Radar Gauge
with flushing connection

Performance

ALARM AND
DIAGNOSTIC
MESSAGES
Refer to "Safety Messages" on page 4-1 and for more information.
™
APEX and APEX Sentry
Flushing Connection with Window
Window
Check the level output from the radar gauge by comparing the gauge output
with a hand dip or other means that is suitable for a level comparison.
Check the 4–20 mA output with a milliampere meter or read the signal on a
current indicator. You can do this type of test by performing a loop test using
the HART Communicator. Before connecting a HART-based communicator in
an explosive atmosphere, make sure the instruments in the loop are installed
in accordance with intrinsically safe or non-incendive field wiring practices.
Set the 4–20 mA current to 4 mA and measure or display the signal on the mA
meter or indicator. Check the 20 mA in the same manner.
Check the ac or dc power supply that supplies operating power to the gauge
to make certain it is still operating within specifications. If a separate dc power
supply is used for the 4–20 mA output, check the dc power supply to make
certain it is still operating within its specifications. Avoid contact with leads
and terminals.
Table 4-1 is a list of alarm and diagnostic messages that may be displayed on
the Integral Display (if installed) or on the Model 275 HART Communicator.
Some of the messages involve the digital signal processor (DSP), which is
one of the microprocessor boards. It simply indicates that this board
originated the message. Also, you will see "Radar Configuration Tools (RCT)"
mentioned in the "Action" column of the table.
If any of these problems persist after performing the suggested action, contact
Rosemount Customer Central at 1-800-999-9307.
If you encounter any of these messages immediately after start up, wait 30
seconds to allow the gauge to "lock on" to a signal. If, after 30 seconds, these
messages are still displayed, follow the course of action listed below.
™
Radar Gauge
Flushing Connection with No Window
4-3