Eagle RA1000 User Manual

RA-1000

RESIDUAL ANALYZER

Installation and Operation

MANUAL

TABLE OF CONTENT

I INTRODUCTION 3 II SPECIFICATIONS 3 III PRINCIPAL OF OPERATION 4

A GENERAL 4 B REAGENT FEED SYSTEM 4

IV INSTALLATION 5

A WALL PANEL MOUNTING 5 B HYDRAULIC CONNECTIONS 5 C TERMINAL CONNECTIONS 5 (DIAGRAM)

V REAGENTS 5

A LIQUID REAGENTS 6

BCARBON DIOXIDE 6 VI START-UP 7 VII OPERATION 7

A CLEANING 7

B REAGENT VALVE (STAR WHEEL) 8

C GOLD ELECTRODE 9

D MOTOR / STRICKER 10

E MOTOR REPLACEMENT 10 VII C02 BUFFERING 11 IX TROUBLE SHOOTING 11 - 13 X INSTRUMENT SETTINGS 13 - 18 XI WIRING DIAGRAM 19

I. INTRODUCTION

The RA-1000 Residual Analyzer/Controller is an amperometric instrument

designed to continuously analyze residual levels of free or total chlorine, chlorine

dioxide, or potassium permanganate in water, wastewater or liquids containing

particulates.

II. SPECIFICATIONS

Power Supply 115/230 VAC Switch selectable.

Power Consumption 12W

Display LCD, backlit, 16 characters by 2 lines, 5mm character

height,5x8 character matrix.

Pushbuttons Four, tactile dome.

Relays High residual, low residual, and two spares

Mechanical (AC or DC), Rating (standard) 1.2A, 125VAC resistive or optional 5A @ 250VAC

Cell Au/Cu (Gold anode/Copper Cathode) Galvanic Cell

input

Temperature Thermistor 10kohms @ 25C, Beta=4100

Analog Output Isolated, 4 to 20mA, 500ohm drive. Represents CL

residual

Digital Output 20mA Serial (transmits to remote computer)

Instrument Range: 0-0.1, 0-0.2, 0-0.3, 0-0.5, 0-1, 0-2, 0-3, 0-5, 0-10, 0-20,

0-30 mg/l field selectable

Sample Flow: 500 cc/minute: 5 psig maximum Sample Supply: Continuous. Where sample interruption may be required;

provisions must be made to keep the electrodes wet with fresh water.

Analyzer Location: As close as possible to the sample point to reduce lag

time.

Speed of Response: 4 Seconds from sample entry to display indication. Full

scale residual change 1-1/2 to 2 minutes.

Ambient Temperature 35 degrees to 120 degrees F (2 degrees to 50 Range: degrees C)

Sample Temperature 35 degrees 120 degrees F Range: (2 degrees to 50 degrees C)

Sample Limitations: Samples containing high concentrations of metal ions or

certain corrosion inhibitors my effect analyzer operation. Accuracy: +/- 2% of selected range Electronics Enclosure: NEMA 4X Reagent Requirements: RESIDUAL MEASUREMENT REAGENT REQUIREMENTS

Chlorine (Free) pH buffer or CO

gas

Chlorine (Total) pH buffer or CO2 gas & potassium iodide Chlorine Dioxide pH buffer & potassium iodide Potassium Permanganate pH buffer

III. PRINCIPAL OF OPERATION

A. GENERAL

A sample of liquid is delivered to the sample filtering chamber at an approximate rate of 500 cc/minute. The excess overflows to drain.

The sample then passes through the annular space between the two fixed electrodes in the sensing cell. As it passes, a small direct current is generated in direct linear proportion to the amount of chemical present in the liquid.

The surface of both electrodes is kept clean by the continuous action of PVC spheres agitated via a motor driven rotating striker.

This constant cleaning eliminates signal drift and recalibration providing an accurate residual measurement. A thermistor compensates for sample temperature variations.

The residual value is displayed on the LCD display.

B. REAGENT FEED SYSTEM

Reagents are fed into the sensing cell to lower the pH to enable reliable measurement. The sample pH is adjusted by the buffer to a range of

4.0 to 4.5 pH. When CO2 is used as a buffer, the pH will be lowered to a range of 5.5 to 6.0 pH. The addition of potassium iodide, when used, reacts to liberate free iodine and provides a means of measurement of total chlorine residual. Refer to CO2 BUFFERING on page 9 for CO operation.

IV. INSTALLATION

A. WALL PANEL MOUNTING

1. Position the analyzer panel on a wall at eye level and as close as possible to the sample source. Secure with bolts, leveling the analyzer before securing.

B. HYDRAULIC CONNECTIONS

1. Connect the necessary length of drain hose to the drain outlet

on the analyzer. Secure with a hose clamp. Route hose to maintain a gravity fed drain (downward slope).

2. Connect one end of the 3/8” sample supply tubing to the source

using a suitable connection (customer supplied). Route tubing to the sample filter chamber through the tubing holders on the analyzer panel. Position the end of the tubing between the filter 0chamber and below the top of the overflow weir.

C. TERMINAL CONNECTIONS

TB5

POWER

TB4

motor

1 2

3 4

K1 K2 K3 K4

TB1

K1 K2 K3 K4

LOW HIGH RESIDUAL

RELAY

8234 567

TB2

+ -

4-20mA

P01

CONTROL

OUTPUT

COM

1 9

TB3

+ - + -+ - + -

+ -

12V

SCR

4-20mA

PV1

+ - + -

PV2

CONTROL

INPUT

A B

CELL THRM

PASS

NOTE: ALL WIRING MUST COMPLY WITH APPLICABLE LOCAL AND NATIONAL ELECTRICAL CODES.

1. Remove four (4) screws securing side cover and remove cover.

2. Connect input power (120 Vac standard) to N,H,G terminals.

3. Connect current output and alarm contacts.

NOTE: DO NOT RUN LINE VOLTAGE AND SIGNAL VOLTAGE IN THE SAME CONDUIT.

V. REAGENTS

A pH buffering solution or carbon dioxide gas is required for analyzer operation. In addition, potassium iodide solution is required when measuring other residuals as described in the SPECIFICATIONS Section.

Fill reagent bottle with pre-mixed solution or mix reagents as follows: NOTE: NEVER DISABLE UNIT WITHOUT REMOVING REAGENT

BOTTLE AND FLUSHING WITH CLEAN WATER UNTIL THE ENTIRE CHEMICAL IS REMOVED.

A. Liquid Reagents for Chlorine Residual

Pre-mixed pH buffer solution is available, contact factory. OR, mix pH buffer solution as follows:

1. For Free Chlorine Measurement: a. Using a 2 quart (1.9-liter) bottle, fill bottle 3/4 full with

distilled/deionized water.

b. Add 460 grams sodium acetate trihydrate crystals and mix until all

the crystals are dissolved.

c. Add 900 grams or 885 cc glacial acetic acid or distilled white

vinegar.

d. Fill bottle to the top with distilled or deionized water and shake to

thoroughly mix solution and pour contents into the analyzer reagent bottle.

2. For Total Chlorine Measurement: Mix potassium iodide solution in a separate bottle. (Potassium iodide

crystals are available. Contact factory.) a. Follow Steps 1.a. through 1.d. above. b. Add potassium iodide crystals as follows:

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