Emerson Rosemount 396P Quick Start Manual page 41

November 2020
Table 4-2: Temperature vs. Resistance of Automatic Temperature
Compensation Elements (continued)
Temperature °F (°C)
104 (40)
122 (50)
140 (60)
158 (70)
176 (80)
194 (90)
212 (100)
4.3 Clean electrode
If the electrode is coated or dirty, clean as follows:
Procedure
1. Remove the sensor from process.
2. Wipe the glass bulb with a soft, clean, lint free cloth or tissue. If this
does not remove the dirt or coating, go to
Detergents clean oil and grease; acids remove scale.
3. Wash the glass bulb in a mild detergent solution. If this does not
clean the glass bulb, go to
4.
Corrosive substance
The solution used during the following step is an acid.
Wash the bulb in a dilute five percent hydrochloric acid solution and
rinse with clean water.
Soaking the sensor overnight in the acid solution can improve
cleaning action.
Quick Start Guide
WARNING
Handle with care.
Follow the directions of the acid manufacturer.
Wear the proper protective equipment.
Do not let the solution come in contact with skin or clothing.
If contact with skin is made, immediately rinse with clean water.
Resistance (Ohms) ±1% PT-100
115.4
119.2
123.1
126.9
130.8
134.6
138.5
Step
Step 4.
Quick Start Guide
3.
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