18
Reference Manual
00809-0100-4728, Rev MB
Configuration
July 2016
Configuration
1. Measure the lead wire resistance of both RTD leads after installing the 2-Wire RTD and Rosemount
644.
2. Navigate to the 2-Wire RTD Offset parameter:
3. Enter the total measured resistance of the two RTD leads at the
2-Wire Offset
prompt to ensure proper
adjustment. The transmitter will adjust its temperature measurement to correct the error caused by
lead wire resistance.
Enter 2-wire offset with Field Communicator
Enter 2-wire offset with AMS Device Manager
1. Right click on the device and select
Configure
.
2. In the left navigation pane choose
Manual Setup
and choose the
Sensor 1
or
Sensor 2
tab
depending on the need. Find the 2-Wire Offset text field and enter the value.
3. Click
Apply
when complete.
2.6.3
Setting output units
The Units can be configured for a number of different parameters in the Rosemount 644. Individual Units
can be configured for:
Sensor 1
Sensor 2
Terminal Temperature
Differential Temperature
Average Temperature
First Good Temperature
Each of the base parameters and calculated outputs from those values can have a Unit of measure
associated with it. Set the transmitter output to one of the following engineering units:
Degrees Celsius
Degrees Fahrenheit
Degrees Rankine
Kelvin
Ohms
Millivolts
From the
HOME
screen, enter the Fast Key sequence
Device Dashboard Fast Keys
2, 1, 1
Содержание Rosemount 644 HART
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Страница 16: ...6 Reference Manual 00809 0100 4728 Rev MB Introduction July 2016 Introduction ...
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