Emerson Rosemount 3900, Quick Start Manual

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1 Install
1.1 Storage
1. Emerson recommends storing electrodes in their original shipping
containers until needed.
2. Do not store at temperatures below 14 °F (-10 °C).
3. Store electrodes with a protective cap containing KCl solution
(PN 9210342).
4. For overnight storage, immerse the sensor in tap water or 4 pH
buffer solution.
5. pH glass electrodes slowly deteriorate in storage. There is no specific
expiration date. Follow the calibration procedures in Calibrate and
maintain to determine that the sensor calibrates properly.
1.2 Prepare electrode
Procedure
1. Remove electrode from shipping container.
2. Remove the protective boot covering the electrode bulb.
3. Rinse away salt film with clean water; then shake the electrode so
that the internal solution fills the bulb, thus removing any air trapped
there.
1.3 Install sensor
Procedure
1. Wrap the sensor threads with six or seven turns of PTFE tape to
prevent leakage.
Do not over tighten the sensor into its receptacle.
2. Hand tighten the sensor and then tighten one or two turns with a
wrench.
November 2020 Quick Start Guide
Quick Start Guide 5