Emerson Process Management 396P Section Description And Specifications, Features And Applications

MODEL 396P and 396PVP	SECTION 1.0
	DESCRIPTIONS AND SPECIFICATIONS

SECTION 1.0

DESCRIPTION AND SPECIFICATIONS

1.1 FEATURES AND APPLICATIONS

The Rosemount Analytical Model 396P and 396PVP Sensors measure the pH or the ORP of aqueous solu- tions in pipelines, open tanks, or ponds. It is designed for harsh, dirty applications such as sourwater waste treatment and scrubbers, where a high performance, low maintenance, disposable sensor is required.

The combination electrode features a patented, large area polypropylene reference junction for resistance to process coatings, generally found in dirty, high solid applications. The patented helical reference pathway provides added resistance for poisoning applications. In addition, it is available in two configurations: glass/platinum electrode completely recessed within the reference junction for added life in abrasive or rough applications and the glass/platinum electrode partially exposed for added life and accuracy in vis- cous and low flow applications.

Both Models feature a titanium solution ground con- structed in an annular design around the pH/ORP elec- trode. The solution ground provides glass and refer- ence sensor diagnostics for preventative maintenance when used with the Model 54e, 1055, 5081, 3081, 4081, 81 pH/ORP, and Xmt-P transmitters. In addition Models 396P and 396PVP can be used with most non- diagnostic Rosemount Analytical and other manufac- turer’s instruments.

Each sensor is housed in a molded polypropylene body with EPDM seals, making it virtually indestructi- ble and chemically resistant. Complete encapsulation eliminates leakage or high humidity problems tradi- tionally found in other pH/ORP designs. The simplified construction, designed with user convenience in mind, does not require electrolyte (KCl) replenishment or any high maintenance troubleshooting procedures.

The Model 396P is offered with or without an optional integral preamplifier to convert the high impedance pH or ORP mV signal into a stable, noise-free signal with transmission capability of up to three miles. A remote preamplifier must be used with Model 396PVP.

Installation is easily achieved through the wide variety of mounting configurations. The Models 396P and 396PVP feature 1 in. (MNPT) front and rear facing connections for insertion, submersion or flow through pH and ORP applications.

Model 396PVP is offered with a watertight sensor-to- cable connector which eliminates re-wiring and cable twisting when replacing sensors. The Variopol VP multiple pin connector is an integral part of each sen- sor model and uses a mating VP cable. Once the cable is installed and wired to the analyzer, sensors are easily replaced without replacing the cable, and, if the replacement sensor is the same as its predeces- sor, without rewiring the analyzer. Also the cable can be disconnected from the sensor before removal from the process which eliminates cable twisting.

The entire line of TUpH model sensors now incor- porate the new SILCORE technology contaminant barrier. This triple-seal barrier prevents moisture and material impurities from migrating to the pH sensor’s reference electrode’s metal lead wire. By preventing these contaminants from compromising the integrity of the pH measurement, sensor life is increased, especially at higher temperatures where increased migrations occur. In addition, the SILCORE technolo- gy provides added protection against sensor failure due to vibrations and shock by transferring damaging energy away from the glass-to-metal seal.

The AccuGLASS pH glass formulations exceed industry standards. The AccuGlass pH glass is a result of many years of glass research resulting in a formulation which has been found to increase the life of the sensor. Unlike other pH glasses presently on the market, this glass resists cracking especially at higher temperatures and reduces sodium ion error commonly found in high pH applications. Overall, the AccuGlass formulation enhances the sensor perform- ance to measure pH more accurately and have a longer sensor life than ever before.

AccuGlass and Silcore are trademarks of Rosemount Analytical.

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