WHAT YOU NEED TO KNOW
BEFORE INSTALLING AND WIRING A ROSEMOUNT ANALYTICAL
SENSOR TO THE MODEL 3081 pH/ORP TRANSMITTER
1.THE MODEL NUMBER OF THE SENSOR
•Look on the label.
•Also note the model option string.
•If the label is missing or unreadable, see the flowcharts on pages 28 through 30.
Write the sensor model number here
2.THE TYPE OF TEMPERATURE ELEMENT
•Look on the label.
•If the label is missing or unreadable, measure the resistance between the RTD leads.
Write the temperature element RTD here
| If resistance is . . . |
| the RTD is . . . |
|
|
|
| ||
| about 110 ohms |
| Pt 100 |
|
| about 3000 ohms |
| Balco 3K |
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|
|
|
|
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3.THE LOCATION OF THE PREAMPLIFIER: INSIDE OR OUTSIDE THE TRANSMITTER?
•If the sensor is wired through a junction box, the preamplifier is ALWAYS in the junction box or the sensor.
