Emerson Rosemount 644h, Reference Manual

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Reference Manual
00809-0100-4728, Rev HA
December 2002
3-9
Models 644H and 644R
Message
The Message variable provides the most specific user-defined means for
identifying individual transmitters in multi-transmitter environments. It allows
for 32 characters of information and is stored with the other configuration
data. The message variable has no impact on the operation of the transmitter
or the Model 275 HART Communicator.
Sensor Serial Number
The Sensor S/N variable provides a location to list the serial number of the
attached sensor. It is useful for identifying sensors and tracking sensor
calibration information.
Diagnostics and Service
Test Device
The Test Device command initiates a more extensive diagnostics routine than
that performed continuously by the transmitter. The Test Device menu lists the
following options:
• 1 Loop test verifies the output of the transmitter, the integrity of the
loop, and the operations of any recorders or similar devices installed in
the loop. See “Loop Test” below for more information.
• 2 Self Test initiates a transmitter self test. Error codes are displayed if
there is a problem.
• 3 Master Reset sends out a command that restarts and tests the
transmitter. A master reset is like briefly powering down the transmitter.
Configuration data remains unchanged after a master reset.
• 4 Status lists error codes.
ON
indicates a problem, and
OFF
means
there are no problems.
Loop Test
The Loop Test command verifies the output of the transmitter, the integrity of
the loop, and the operations of any recorders or similar devices installed in the
loop. To initiate a loop test, perform the following procedure:
1. Connect a reference meter to the transmitter. To do so, shunt
the transmitter power through the meter at some point in the loop.
2. Model 644H: From the
HOME
screen, select 1 Device Setup , 2
Diag/Serv , 1 Test Device , 1 Loop Test before performing a loop test.
Model 644R, select 1 Device Setup , 2 Diagnostics and Service, 2
Loop Test . Select
OK
after setting the control loop to manual. The
communicator displays the loop test menu.
3. Select a discreet milliampere level for the transmitter to output. At the
CHOOSE ANALOG OUTPUT
prompt, select 1 4mA , 2 20mA , or
select 3 other to manually input a value between 4 and 20 mA.
4. Check the current meter installed in the test loop to verify that it reads
the value that was commanded to output. If the readings do not
match, either the transmitter requires an output trim or the current
meter is malfunctioning.
Fast Key Sequence 1, 3, 4, 4
Fast Key Sequence 1, 3, 2, 1, 4
Fast Key Sequence 1, 2, 1
Fast Key Sequence 1, 2, 1, 1