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Reference Manual
00809-0400-4728, Rev AA
June 2011
3-11
Rosemount 644
Configuration Examples
4-wire, Pt 100 = 385
AI1 = Process Temperature
AI2 = Terminal Temperature
Transducer Block
If Host System Supports Methods:
1. Click on Methods
2. Choose Sensor Connections
3. Follow on-screen instruction.
If Host System Doesn’t Not Support Methods:
1. Put transducer block into OOS mode.
a. Go to MODE_BLK.TARGET
b. Choose OOS (0x80)
2. Go to SENSOR_CONNECTION.
a. Choose 4-wire (0x4)
3. Go to SENSOR_TYPE.
a. Choose PT100A385
4. Put the transducer block back into Auto mode.
AI Blocks (Basic Configuration)
(1)
AI1 as Process Temperature
1. Put the AI Block into OOS mode.
a. Go to MODE_BLK.TARGET
b. Choose OOS (0x80)
2. Go to CHANNEL
a. Choose Sensor 1
3. Go to L_TYPE
a. Choose Direct
4. Go to XD_Scale
a. Choose UNITS_INDEX to be °C
5. Go to OUT_SCALE
a. Choose UNITS_INDEX to be °C
b. Set the 0 and 100 scale to be the same as the
PRIMARY_VALUE_RANGE
6. Put the AI Block back into Auto mode.
7. Follow Host Procedure Download Schedule into Block.
(1) Configure a minimum of four parameters to get a value out of the AI Block.