Chemtrac TM2200 Manual de usuario

OPERATIONS MANUAL

ONLINE TURBIDIMETER

3/25/07

TM2200

Page 2

TABLE OF CONTENTS

Section Title Page

IMPORTANT INSTRUCTIONS ........................................................................... 3

WARRANTY INFORMATION .............................................................................. 4

1 GENERAL INFORMATION ................................................................................. 5

Overview .......................................................................................... 5

Debubbler .......................................................................................... 5

Convertible Cuvette..................................................................................... 5

Light Source .......................................................................................... 5

Proper Sampling Point ................................................................................ 6

Technical Specifications.............................................................................. 8

2 MOUNTING AND INSTALLATION...................................................................... 9

Mounting .......................................................................................... 9

Wiring Safety .......................................................................................... 9

Wiring .......................................................................................... 9

Sample Connection ..................................................................................... 10

3 OPERATION .......................................................................................... 11

Display/User Interface…………………………………………………………… 11

Menus and Controls …………………………………………………………… 12

Main Screen ………………………………………………………………… 12

Menu Screen ………………………………………………………………… 13

4 INSTRUMENT CALIBRATION ............................................................................ 17

Primary Calibration ………………………………………………………. ..... 17

Secondary Calibration………………………………………………………….. 20

5 OUTPUT HOLD .………………………………………………………………... 21

6 I/O SETUP ………………………………………………………………… 23

7 MAINTENANCE ………………………………………………………………… 25

Lamp Replacement…………………………………………………………….. 25

Cleaning ………………………………………………………………... 25

Figures and Images

Figure 1 Sample Tap ……………………………………………………………….. 7

Figure 2 Mounting Dimensions………………………………………………………. 26

Figure 3 Electrical Connections……………………………………………………… 27

Photo 1 Cuvette Sample Connection……………………………………………….. 28

Photo 2 Cuvette Indexing……………………………………………………………... 29

Photo 3 Electrical Connections……………………………………………………… 29

Photo 4 Sample Inlet and Drain……………………………………………………… 30

Photo 5 Lamp Connections…………………………………………………………... 30

Chemtrac Systems, Inc.

Page 3

IMPORTANT INSTRUCTIONS

When using this instrument, basic safety precautions shall always be followed to

reduce the risk of fire, electrical shocks and injury to persons, including the

following:

5Before attempting to unpack, set up, or operate this instrument, please

read this entire manual.

5Follow all warnings marked on the instrument. Failure to follow these

precautions could result in personal injury or damage to the equipment.

5Do not attempt to disassemble the unit.

5Do not modify any internal electrical wiring or electronics.

5Make certain the unit is disconnected from the power source before

attempting to service or remove any component.

5Water must not enter the housing of the unit. Be sure to close and fasten

the covers of the unit following any opening.

5Use a mild non-abrasive cleanser when cleaning the outer cover of the

unit.

5Do not drop or jar the unit.

SAFETY PRECAUTIONS

In order to provide maximum user safety this instrument was designed with all electrical

circuitry enclosed within a protective non-conductive housing. The label below will be

visible at any location where high voltage is present.

Chemtrac Systems, Inc.

Page 4

WARRANTY INFORMATION

Chemtrac®Systems, Inc. warrants its equipment to be free from defects in

material and workmanship for a period of one (1) year from date of shipment to

the original purchaser. Upon receipt of written notice from purchaser, seller shall

repair or replace the equipment (at option of Chemtrac®Systems, Inc.).

Chemtrac®Systems, Inc. assumes no responsibility for equipment damage or

failure caused by:

1. Improper installation, operation, or maintenance of equipment

2. Abnormal wear and tear on moving parts caused by some processes

3. Acts of nature (i.e., lightning, etc.)

This warranty represents the exclusive remedy of damage or failure of

equipment. In no event shall Chemtrac®Systems, Inc. be liable for any special,

incidental, or consequential damage such as loss of production or profits.

Should you experience trouble with the equipment, please contact:

Chemtrac Systems, Inc

6991 Peachtree Industrial Blvd., Building 600

Norcross, GA 30092

Phone: 800-442-8722 (Inside US only), 770-449-6233

Fax: 770-447-0889

Email: [email protected]

Website: www.chemtrac.com

Chemtrac Systems, Inc.

Page 5

SECTION 1

GENERAL INFORMATION

OVERVIEW

The Chemtrac TM2200 is an online nephelometric turbidimeter. The TM2200 continuously

monitors, records, and reports (integrated with SCADA) turbidity compliance data for municipal

water filtration processes. A local display prompts the user with calibration steps, diagnostic

data, and immediate turbidity data without the need for a laptop or data recorder. The TM2200

design permits easy access to the light source for maintenance and replacement. By

incorporating an all-in-one package, the TM2200 design simplifies installation and assists the

operator with monitoring water quality from multiple filter effluents.

Debubbler

The debubbler maximizes the removal of entrained air bubbles that would otherwise interfere

with the turbidity measurement. The debubbler unit is within the enclosure of the TM2200. The

separate inlet and outlet barbed tube connections facilitate an easy connection to the water

source. A slipstream is taken off of the debubbler for sampling and the constant head pressure

from the debubbler ensures a constant flow to the sample cell.

The modular design of the debubbler allows for convenient cleaning and maintenance.

Convertible Cuvette

The up-flow cuvette sample cell is a sampling improvement over the common approach of using

a larger reservoir for turbidity measurements.

The 35 mL cuvette same sample cell is easily converted for use in the calibration process. Index

marks on the cuvette and the seam created by the two parts of the sensor block assure that the

optical surface of the cell is consistently lined-up for the calibration and online phases of

operation. See Photo 2

Light Source

The light source does not come in direct contact with the sample, nor does it have any large air

spaces that could lead to the accumulation of dust or moisture.

The tungsten bulb has a better than 15,000 hour life expectancy (20+ months). For

replacement, the watertight bulb housing is conveniently accessible from the side of the sensor

head.

Chemtrac Systems, Inc.

Page 6

SELECTING PROPER SAMPLE POINT

The high sensitivity of the instrument makes sample handling and delivery critical for proper

operation. Poor results caused by improper sample handling will not only reduce the value of

the instrument to the user, but they can result in regulatory penalties. An increase in a small

number of particles in the filter effluent caused by poor sample control can cause a significant

increase in measured turbidity.

It is not difficult to achieve proper sample delivery in virtually any treatment plant. The important

thing is to make sure the sample is a proper representative of the process stream. There are

three ways in which the sample can be distorted:

1. Adding particles to the sample stream. Choosing an improper location for the sample

tap, such as the bottom of a pipe where sediment can accumulate, or an open sample

point where particles can be introduced from outside the process.

2. Losing particles from the sample stream. Long sample lines can cause particle dropout,

especially at low flow rates. If the sample line must be long (more than 10 or 15 feet), a

large pipe should be used with a flow rate that keeps the sample moving as fast as the

process stream. Particles will settle out of standing water.

3. Altering the particle distribution. Sample pumps can chop up larger particles creating

more small particles. Valves and other obstructions can cause "shedding.” Particles

collect on cracks and edges and then break loose later. "T-fittings” can cause larger

particles to miss the sample line because they do not necessarily make the sharp right

angle "turn.”

Of course, it is seldom possible to avoid all of these pitfalls. Valves are often needed to control

sample flow rates, or pumps are used to get the sample to a usable point. The important thing is

to minimize these problems. Filtered water can be pumped with fewer problems than raw or

settled water since only very small particles are usually present, and they are less likely to be

broken up. Ball valves, or other types with minimal edges to trap particles, can be used. "Y-

fittings” can be used instead of "T'-fittings.”

Sample Taps

The diagram below shows proper and improper sample locations on a process pipe. These are

the same as for any instrument requiring a representative sample flow. See Figure 1.

Make sure that the sample point has the minimum pressure available at all times to provide

enough flow.

Chemtrac Systems, Inc.

Page 7

Figure 1. Sample Tap

Chemtrac Systems, Inc.

Page 8

TECHNICAL SPECIFICATIONS

Compliance: USEPA 180.1

Range: 0 - 100 NTU

Resolution: 0.0001 Up to 2.0000 NTU;

0.001 From 2.001 to 9.999 NTU;

0.01 Greater than 9.999 NTU

Repeatability: Better than ± 1.0% of reading or ± 0.002 NTU

Signal Averaging: User selectable from 1-90 seconds

Sample Flow: 100 to 1000 mL/min.

Sample Temperature: 0-50°C, (32-122°F)

Operating Temperature: 0-50°C, (32-122°F)

Light Source: Tungsten lamp

Lamp Life (MTTF): Greater than 15,000 hours (20 months)

Outputs: Two selectable 4-20 mA isolated, adjustable over entire range

Both outputs transmit current turbidity value

Digital Communications: RS485 (Modbus RTU & Modbus ASCII), Ethernet (Modbus TCP),

& Bluetooth

Certifications: CSA, CE

Enclosure: NEMA 4X

Power Requirements: 100-240 VAC, 47-63 Hz, 0.5 A

Mounting: Single module design; wall, rack or stand mount

Dimensions: 53 cm H x 23 cm W x 20 cm D (21"H x 9"W x 8"D)

Shipping Weight: 6 Kg (13 Lbs.)

Chemtrac Systems, Inc.

Page 9

SECTION 2

MOUNTING AND INSTALLATION

MOUNTING

The TM2200 Turbidimeter should be permanently mounted in an upright position using the

mounting holes on the enclosure. See Figure 2 for details.

WIRING SAFETY

Please observe the following safety precautions prior to wiring the unit:

•Power must be locally fused or switched prior to entering the unit

•Disable power circuit prior to hardwiring the unit

•Observe polarity when connecting the unit. The unit may not function properly, and can

be damaged, if polarity is crossed

•All wire connections should be tinned prior to connecting to ensure proper contact and to

prevent corrosion

•The unit must be connected to earth ground

WIRING

Following the installation guidelines outlined in this manual should result in proper operation

with minimal problems. Individual plant requirements and layouts will vary, resulting in

alterations to the procedures. All wiring connections are located beneath the connection cover

plate. See Figure 3.

•Disable power circuit that supplies power to the unit

•During installation, a local isolation point must be supplied

•Mount the TM2200 in the upright position (Chemtrac logo upright) using the four

mounting holes on the back of the enclosure. Unit may be fastened to mounting

brackets, pipe stand or similar

•Wiring should be fed through the compression fitting on the bottom of the enclosure.

NOTE

When feeding wire into unit it is always important to feed through the compression fitting

that is closest to that wire connection.

All external electrical connections are shown in Figure 3.

Electrical power should be connected in the following order.

1. Insert the ground (earth) wire into the middle terminal labeled “G”

2. Insert the Line wire into the left terminal labeled “L”

3. Insert the neutral wire into the right terminal labeled “N”

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