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3.5
Autocalibration setup
If autocalibration is desired, the Xi must be used with either an SPS 4001B or IMPS 4000.
The Xi must be properly configured before autocalibration can take place. Refer to the
applicable SPS 4001B or IMPS 4000 instruction manual for details on performing
autocalibration. Refer to
An Xi is shipped from the factory without autocalibration configured. This same process
must be performed any time a replacement I/O board is installed.
3.6
Configure analog output
The analog output signal from the Rosemount 6888A can be configured for the 4-20 mA
range and fault condition. A separate configuration is set up when the Rosemount 6888A
is used with the optional Rosemount 6888Xi Advanced Electronics. When the Rosemount
6888A is used without the Rosemount 6888Xi, this parameter must be set to NO. If it is set
to YES and a Rosemount 6888Xi is not connected, the Rosemount 6888A triggers an alarm
and forces the analog output to the fault level. If the Rosemount 6888A is used later with a
Rosemount 6888Xi, the Rosemount 6888Xi automatically sets this parameter to YES.
An Rosemount 6888A shipped from the output has the analog outputs set to 4 to 20 mA
range with a 3.5 mA alarm level. You must complete the same process any time
transmitter board is replaced.
1.
2.
3.
4.
5.
6.
7.
Quick Start Guide
Chapter 4
Use the 375/475 Field Communicator to access the main HART menu.
From the main menu, select CONFIGURE.
From the CONFIGURE menu, select MANUAL SETUP.
From the MANUAL SETUP menu, select ANALOG OUTPUT.
From the ANALOG OUTPUT menu, select from the following parameters; then press
ENTER.
•
O
LRV: O
value at lower analog output value (0% at 4 mA, non-configurable)
2
2
•
O
URV: O
value at upper analog output value (50% max at 20 mA)
2
2
•
Output Range: Range of analog output (4-20 mA, non-configurable)
•
Alarm level: O
alarm level (3.5 mA or 21.1 mA)
2
•
Xi Mode: Selects whether or not the Rosemount 6888A is used with a Rosemount
6888Xi (should always be set to NO for a stand-alone Rosemount 6888A)
Use the stylus to enter the value; then press ENTER when finished.
Use the stylus to select SEND to update the Rosemount 6888A.
for details on manual calibration procedures.
Configure
17
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