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DOCUMENTATION
ECA 2100/ECAT 2100 Datasheet | PDF File (78 KB)

ECA 2100 Operator Manual | PDF File (598 KB)
SYSTEM DESCRIPTION

The ECA 2100/ECAT 2100 is an essential tool for charge measurement in water treatment, wastewater treatment, pulp & paper, and several other industries. The ECA series provides affordable and easy to use laboratory charge analysis using the streaming current principle, which is comparable to zeta potential. The ECAT offers a built in automatic titrator for added convenience.

In water and wastewater applications, the ECA can be used to quickly find the optimum coagulant dosage much faster than conventional jar testing. The ECA is responsive to colloidal and soluble charged species making it an excellent tool for determining an accurate dosage when swings in turbidity and organics occur. The easy setup and use of the ECA ensures fast response time and gives the operators the tool they need to optimize turbidity and TOC removal. Coagulant dosage is determined by titrating a raw water sample with coagulant until the isoelectric point (neutral) is reached. The amount of coagulant needed to reach neutral correlates to an optimum dosage of coagulant in most cases*.

For the pulp & paper industry, the ECA provides accurate measurements of cationic or anionic charge demand which enables the customer to track changes in system charge caused by swings in anionic trash levels, changes in additive feed rates, carryover from the pulp mill, etc.. Charge demand is determined with polyelectrolyte titration to the isoelectric point, either manually or by use of an automatic titrator.

*Results vary depending on water chemistry and type of coagulant used.

BENEFITS

LabTrac - Accompanying software for extracting and analyzing titration data

A user-friendly touch screen

Sample volume range of 10-2000 ml for greatest accuracy

Sturdy housing for easy mobility, quick set-up, and bench-top stability

Detachable probe to facilitate cleaning and prevent corrosion

Gain control to amplify low level signals

Sensitivity adjustment for highly conductive samples

Zero offset allows adjustment of the titration end point.
STREAMING CURRENT PRINCIPLE
The measurement cell of the ECA consists of a reciprocating piston in a probe assembly that has two embedded electrodes. Particles and dissolved materials are attracted to the surfaces of the piston by Van Der Waals forces. Counterions surround these particles. The motion of the piston generates shear forces, which causes the counterions to migrate. Electrodes in the probe measure the flow of counterions, inherently defined as an electrical current. The current is electronically processed and displayed on the touchscreen as the STREAMING CURRENT VALUE (SCV).
CHARGE DEMAND (ISOELECTRIC TITRATION)
The ECA 2100/ECAT 2100 allows the operator to determine the charge demand of a sample. Charge demand is quantified by adding a coagulant or polymer of opposite charge to the sample until the SCV equals zero, which is defined as the isoelectric point. Addition of the polymer (or process additive) can be achieved by hand or automatic titration. The SCV can be graphed on the touchscreen so the titration curver can be evaluated and even downloaded to the LabTrac software.. The graphing capability increases the operator's understanding of the titration in real time.
ACCESSORIES
Probe

Piston

Magnetic stirrer assembly

Operations Manual


Optional Accessories:

One liter bottle of .001N Poly Dadmac

One liter bottle of PVSK

Probe cleaning brush

250 ml beaker

Two Syringes

Hard shell portable carry case
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6991 Peachtree Industrial Blvd.- Bldg. 600
Norcross, GA 30092
Phone: (770) 449-6233 (800) 442-8722 Fax: (770) 447-0889
chemtrac@chemtrac.com

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