Metso 3300 Series User manual

Brand: Metso

Model: 3300 Series

Type: User manual

Metso 3300 Series

The Metso 3300 Series is a line of Concentration TCUs designed for concentration measurement based on electrical conductivity and temperature using Metso 4-electrode conductivity sensors series 4300. It is designed for wall mounting or panel mounting in industrial plant environments.

The TCU has four set-up modes, three for concentration and one for conductivities. Each of the four set-up modes has access to individual setting of temperature compensation, output range, alarm, and calibration. The set-up modes are selectable remotely or from the keypad.

The TCU has two 4-20 mA current outputs, a display, and a keypad. The line-powered version has two relays for alarms.

Metso 3300 Series

The TCU has two 4-20 mA current outputs, a display, and a keypad. The line-powered version has two relays for alarms.

Concentration TCU Manual

Series 3300

2 MANUAL

Manual Series 3300

MANUAL 3

Contents Manual Series 3300

3300 Concentration TCU

User's manual

Contents

1. General information

1.1 Description 4

1.2 Sensors 4

1.3 Temperature compensation 4

1.4 Applications 4

1.5 TCU specications 5

1.6 Warranty 5

1.7 Conformity 5

1.8 Disposal 5

2. Installation

2.1 Dimensions 6

2.2 Installation notes 6

2.3 Mounting the TCU 7

2.4 Electrical connections 8

2.5 Connecting the sensor 10

2.6 Mounting the sensor 11

2.7 Testing the system after installation 14

2.8 Troubleshooting 15

2.9 Maintaining the sensor operation 16

3.Operation

3.1 Keyboard and display 17

3.2 Menu description 18

3.3 Adjusting the TCU 19

Appendix

A Menu 21

B Sensor connection diagram and test probe 23

C The packing system of the sensors 24

D Spare parts 25

E List of related documents 26

915.16 Rev.: 2013-04-08

4 MANUAL

Manual Series 3300 1. GeneRAL InFoRMAtIon

1. General information

1.1 Description

The series 3300 Concentration TCU is designed for con-

centration measurement based on electrical conductivity

and temperature using Metso 4-electrode conductivity

sensors series 4300. It is designed for wall mounting or

panel mounting in industrial plant environments.

The TCU has four set-up modes, three for concentration

and one for conductivities. Each of the four set-up modes

has access to individual setting of temperature compen-

sation, output range, alarm, and calibration. The set-up

modes are selectable remotely or from the keypad.

The TCU has two 4-20 mA current outputs, a display, and

a keypad. The line-powered version has two relays for

alarms.

Optionally the HART© protocol for eld device trans-

mitters can be implemented. For the full specications,

please refer to 915.19 HART Field Device Specication for

series 3000.

HART© communication: Add “H” to the type number.

1.2 Sensors

Sensors are based on the 4-electrode principle according

to which the current and the voltage are measured across

separate electrodes. That eliminates the errors from the

polarization eect that is generally a problem at high

conductivities.

The value of the cell constant is stored in the sensor. This

makes all sensors interchangeable without sacricing

accuracy and without the need for recalibration or re-

entering the cell-constant when exchanging the sensor.

A large selection of sensor types is available meeting the

needs for almost any application.

1.3 Temperature compensation

In an electrolyte, all ions present will contribute to the

conductivity. Dierent ions will contribute with dierent

amounts and the amounts will vary with temperature.

When the conductivity is used for the calculation of a

chemical concentration, it is necessary to calculate what

the conductivity would be at a xed temperature (the

conductivity is temperature compensated). This con-

ductivity is calculated from measured conductivity and

temperature. As dierent ions have dierent temperature

dependences, the temperature compensation is to be

selected to t the actual application. The temperature is

measured with a Pt-1000 resistor in the sensor.

1.4 Applications

The type 3300 Concentration TCU is designed for applica-

tions in the chemical industry, mainly strong acids, but

bases and salts are also covered.

The values to do the signal conditioning for each applica-

tion are stored under a recipe No. The values control the

measuring range, the temperature compensation, the

linearization, the expansion, and the conversion to engi-

neering units.

Concentration recipes

If non-standard recipes are specified they are implemented in Set-up 1

Conductivity temperature compensation

TCU versions type No

Loop-powered Line-powered

Wall mounted 3307 3317

Panel mounted 3308 3318

Set-up 1, 2, and 3

Recipe Application Span Temperature

196.03 HCl 0-15 % 10-80°C

194.59/2 HCl 25-40 % 0-60°C

194.60 HCl 30-36 % 15-45°C

194.56 HF 99.7-100 % 0-50°C

194.56/2 H2O in HF 0-3000 ppm 0-50°C

196.62 HNO3 0-20 % 0-90°C

194.51/3 HNO3 50-75 % 0-65°C

194.70 P2O5 45-60 % 20-80°C

196.42 H2SO4 0-10 % 0-100°C

196.43/3 H2SO4 0-20 % 15-80°C

194.31 H2SO4 50-80 % 25-60°C

194.28 H2SO4 72-82 % 20-70°C

194.10 H2SO4 92-100 % 20-70°C

194.06 H2SO4 93-100 % 20-110°C

196.59 H2SO4 0-230 g/l 0-50°C

194.25 SO3 (Oleum) 18-34 % 20-80°C

194.26 SO3 (Oleum) 55-70 % 25-80°C

196.58 NaOH 0-10 % 0-100°C

194.61 NaOH 20-40 % 20-50°C

194.62 NaOH 45-55 % 40-75°C

196.56 NaCl 0-10 % -5+100°C

196.60 SO2 0-25 g/l 0-50°C

Set-up 4

Reference temperature 25°C

OFF

STD Salt 0 - 200°C

IEC 746 BII 0 - 150°C

NaOH 1% 0 - 150°C

HNO3 1% 0 - 150°C

H2SO4 1% 0 - 150°C

H3PO4 1% 0 - 150°C

MANUAL 5

1. GeneRAL InFoRMAtIon Manual Series 3300

1.5 TCU specications

Conductivity range: 0 nS/cm-2 S/cm (0 µS/m-200S/m)

at reduced accuracy up to 100 S/

cm (10000S/m)

Accuracy, typical (cc=0,2):±0.5%

40nS/cm – 200mS/cm

±2.5% 40nS/cm – 2S/cm

Electrode system: 2 or 4 electrodes

Cell Constant range: Automatic 0.01 to 5

Manual 0.0001 to 99999

Temperature sensor: Pt1000, 4-wire interface

Temperature range: -40°C to +250°C

Sampling rate: 1 sample per sec in normal mode

3 sample per sec. in fast mode

Display: Graphic LCD with backlight in

line-powered types

Current outputs: Line-powered version

Two galvanically isolated 4-20

mA outputs, sharing the return.

Voltage capacity: 16V@20mA

Voltage to ground max. ±85V

Resolution 16 bit

Linearity: ± 0.02%

Endpoints: ± 0.2%

Loop-powered version

Two galvanically isolated 4-20

mA passive outputs, one of

which is the power supply for the

instrument.

Voltage 16-30 V on mA1.

Voltage 6-30V on mA2.

Remaining specications as for

the line-powered version.

Control inputs: Two galvanically isolated inputs

sharing a common return.

Input voltage: +12 to 30V DC

referred to common.

Voltage to ground max. ± 85V

Alarm: Line-powered version

Two relays: One NO contact each.

Contact rating 250VAC 6A, make

current 15A,

Max. breaking capacity 1500VA

Max. break Voltage 400VAC

Dielectric strength coil-contact

4000V, contact-contact 1000V

Enclosure: IP65 when front cover open

IP67 when front cover closed

Temperature ranges: Operation -10 to +60°C

Storage –20 to +70°C

Power supply: Line-powered version

85-265Vac, 50-60Hz, 5VA

Loop-powered version

16-30V on mA1

Housing: Cast aluminium, painted.

1.6 Warranty

We warrant that each new instrument delivered by us is

free from defects in material and workmanship and that

properly used it will perform in full accordance with the

applicable specications.

Any instrument that within its warranty period is found

not to meet those specications after examination by

or in the presence of the supplier will be repaired or re-

placed free of charge except for shipping costs.

The warranty period for electronic parts, TCUs, etc. is two

years from delivery - for mechanical parts, sensors, and

accessories one year from delivery.

1.7 Conformity

1.8 Disposal

After ended lifetime, this equipment should

be scrapped in an environmentally sound

manner.

The equipment contains no batteries.

Declaration of conformity

We, Metso Denmark A/S hereby declare on our sole respon-

sibility that the:

Conductivity TCU type 3300 with corresponding sensors is in

conformity with the following standards:

Emission:

Product family standard industry EN 61000-6-4:2007

EN 61000-3-2:2006 including A1:2009 and A2:2009 or

EN 61000-3-12:2005; Harmonic current

EN 61000-3-3:2008 or EN 61000-3-11:2000; Flicker

Immunity:

Product family standard industry EN 61000-6-2:2005

Exi:

In respect to the EC directive 94/9/EC Annex II,2.3.1 for equip-

ment in categori 3:

- The TCU has no ignition sources in normal operation.

-During normal operaton the increase of surface temperature

from ambient will be below 5°C for line-powered TCUs and

below 2°C for loop-powered TCUs.

Place, date Signature

Lyngby, 2012-08-07

Metso Denmark A/S

The equipment is constructed for permanent

installation and must be grounded for safety

reasons. A power switch must be available

close to the equipment.

6 MANUAL

Manual Series 3300 2. InstALLAtIon

2.2 Installation notes

When planning the installation of the series 3000 conductivity TCU, a number of issues have to be considered;

• Whether mounted on a wall, in a panel or onto a piping

or cable tray, the place should be free of vibrations and

mechanically shocks should not occur.

• Protect the instrument from process electrolyte, and

from downpour. If necessary use a Protection Shield.

• Protect the instrument from excessively high or low

temperatures and from direct sunlight.

• Be aware of the sensors requirements for liquor volume

around the sensor tip.

• Mount the sensor at a place where it is protected from

mechanical impact, where it can be accessed and

extracted from the process liquor for service jobs, and

where the process liquor is properly grounded via the

process piping.

• Avoid long sensor cables if possible.

• Protect the sensor cable from mechanical impact, exces-

sive high or low temperatures and process electrolyte.

• Look up for ground loop currents, which can cause a

uctuating or faulty reading. There should be no po-

tential between the mounting place of the TCU case

and the sensor. If mounting the TCU on a cable tray,

the cable tree should be electrically connected to the

process piping. Also, look up for a potential dierence

between the protective ground and the process piping

and/or the mounting place of the TCU.

• A special situation arises where the process piping is

made by isolating material e.g. PTFE lined steel- piping,

PVC or PP piping, giving no ground-connection of the

process electrolyte. If the sensor is of the type where no

metal structure is in electrical contact with the process

electrolyte giving a grounding of the process electro-

lyte that way, it is necessary to establish a grounding

electrode in the process electrolyte, which must be

connected to the metal structure of the sensor or to the

housing of the TCU.

Dimensions in millimetres

2. Installation

2.1 Dimensions

MANUAL 7

2. InstALLAtIon Manual Series 3300

2.3 Mounting the TCU

Wall mounting

To access the sensor connector, open the lid and

dismount the four corner screws

Panel mounting

Panel cut-out: 138*138 mm

(5.34” * 5.34”)

Pipe mounting

The TCU bottom part can be turned 90° for

mounting on a horizontal tube

Pipe mounting kits

Type No. For pipe

dimension

4902a 25-38 mm

4902b 35-52 mm

4902c 50-73 mm

4902d 72-94 mm

4902e 82-114 mm

8 MANUAL

Manual Series 3300 2. InstALLAtIon

2.4 Electrical connections

Loop-powered version

MANUAL 9

2. InstALLAtIon Manual Series 3300

Line-powered version

10 MANUAL

Manual Series 3300 2. InstALLAtIon

2.5 Connecting the sensor

MANUAL 11

2. InstALLAtIon Manual Series 3300

If the sensor is mounted in a downstream pipe the

mounting point shall be moved away from locations

where an air funnel may be created (c)(d), otherwise it

may be necessary to insert a ow damper just after the

measuring point (f)(g).

If a continuous TCU is wanted even in case the pipe runs

empty, an installation like (h) can be used. The sensor

is mounted at the under side of the horizontal pipe in a

cone, to let air bubbles pass without disturbing the TCU.

Sensor (i) is used to for concentration control in a loop.

The dosing is injected before the sensor, preferably with

a pump between the dosage and the sensor to provide

for mixing before the TCU. The sensor is mounted on the

pressure side of pump to minimize inuence from air

bubbles.

It is recommended to install valves so that the sensor

can be removed for service without a shutdown of the

process.

2.6 Mounting the sensor

General rules

The sensor should be mounted at a place where there

will be no occurrence of air pockets or bubbles.

The best installation is obtained across a pump (a) or in

an upstream pipe (b) (e).

12 MANUAL

Manual Series 3300 2. InstALLAtIon

Sensor (a) is mounted in a tank where it is intended to

control dosing via a pump. If the agitation in the tank

stops, the control loop is opened, and the dosage control

will fail. Control loop will also fail if the liquor level falls

below the sensor measuring head.

Sensor (b) is mounted in a horizontal pipe. If the ow is

too low or in case of no ow, air bubbles may occur or the

pipe may not be lled. Consequently, the sensor will be

measuring partially in air, giving a faulty reading.

Sensor (c) is installed where bubbles may occur due to lo-

cal boiling caused by the vacuum created by the liquor in

the long downstream pipe.

Sensor (d) is installed in a downstream pipe close to an

open ending. The pipe will never be lled and the sensor

will give a faulty reading.

Sensor (e) is installed in the suction side of a pump where

the pressure is low while the pump is running. Conse-

quently, air bubbles may be formed causing a faulty

reading.

Wrong mounting

MANUAL 13

2. InstALLAtIon Manual Series 3300

Typical mounting of 4338 and 4339 sensors

14 MANUAL

Manual Series 3300 2. InstALLAtIon

2.7 Testing the system after installation

From factory the Metso TCU system has been set up ac-

cording to the specications of the purchase order and

the sensor has been adjusted in the relevant liquid.

The TCU determines the concentration based on conduc-

tivity and temperature. Deviations from accurate labora-

tory analyses of the liquor may occur for various reasons,

like for instance liquor composition and installation.

After installation, it is recommended to do a test by com-

paring TCU readings with laboratory results. We recom-

mend using at least 10 readings taken over several days.

Those readings must cover the concentration range of

the TCU as far as possible.

Example:

The readings shall be plotted in a X-Y diagram to show

how well they correlate, whether the sensitivity is correct,

and whether there is any oset. When evaluating the re-

sults, the standard deviation of the laboratory tests shall

be considered. If the correlation between the laboratory

results and the TCU readings is low, the installation shall

be checked. Especially it shall be considered if air bubbles

occur and if the sensor tip is constantly surrounded by

liquid. It may also be helpful to check the working proce-

dure in the laboratory. If the correlation is satisfying but

there is a slope error and/or an oset error, the calibration

line can be changed.

See section 3.3 “Adjusting the TCU”.

G.O.S. 19661 20 - 40 % NaOH

Date Time TCU Laboratory value

021004 09:15 24.0 26.3

021004 12:00 25.1 26.9

021004 14:30 27.7 28.9

021005 09:30 34.1 34.7

021005 11:00 30.9 32.1

021005 13:30 29.0 30.0

021005 15:30 29.2 31.0

021006 09:00 24.0 29.5 disregarded

021006 11:30 32.3 33.6

021006 14:00 31.5 32.5

MANUAL 15

2. InstALLAtIon Manual Series 3300

2.8 Troubleshooting

• Locate the problem to the TCU, the sensor, sensor instal-

lation or to the electrical connections.

If possible shift to another sensor or use a test probe to

check the TCU.

• Temperature reading very wrong:

Check Pt1000 in sensor for short circuit or interruption

The check can be done by resistance measurement from

the sensor connector.

• Temperature reading partly wrong:

This error may arise from a poor thermal contact of the

Pt1000 element to the sensor structure.

The thermal contact can be checked by measuring the

response time for a temperature change.

Another source of error may be the installation. The steel

part of the sensor with the reduced diameter is to be

fully inserted in the process liquor ow.

• Conductivity/process value far out of range:

Check the sensor cable for damage and check the sen-

sor cable connection in the TCU for broken wires.

• Is the sensor tip surrounded with process liquor

• Check the measuring section of the sensor for scaling

deposits and for electrode damages.

• No reading in display:

Check line voltage, fuses and check that the connectors

are in place.

• Setting of the temperature compensation

• Setting of analog output and accordance to setting of

analog input of DCS

• Make a record of set-up info (Appendix A)

If help is required from factory please make a record

of the measurement display and the service display.

This can be done with photos. Use backlight if

possible or illuminate the display from up or down in

a 45° angle to avoid reexes. Do not use ash.

16 MANUAL

Manual Series 3300 2. InstALLAtIon

2.9 Maintaining the sensor operation

Cleaning the sensor

Cleaning may be necessary if deposits have built up to an

extent that aects the cell constant of the electrode part.

When cleaning the sensor do not use hard material to

scrape or grind. Use a soft brush or cloth and a suitable

cleaning remedy depending on the nature of the depos-

its. Be carefull not to damage the electrodes as this might

aect the accuracy of the sensor.

Chemical cleaning can be applied by using any reagent,

that will not aect the sensor material. Sulphamic acid

(NH2SO3H) is recommended. Use 250 g in 1 litre of water.

Heat the water to ease dissolving. The solution can be

used cold or warm.

List of usable cleaning acids for sensors.

Insert for max. 2h at 30°C~ 86°F

Acetic acid CH3 COOH

Citric acid C3H4 (OH) (COOH)3

Formic acid HCOOH

Lactic acid C3H4 (OH) COOH

Nitric acid HNO3

Oxalic acid (COOH)2 , max. 40% w/w

Phosphoric acid H3PO4

Sulphamic acid NH2SO3H

Sulphuric acid H2SO4 , max. 30% w/w

Tartaric acid C2H2 (OH)2 (COOH)2

Warning! Do not use:

Hydrochloric acid HCl

Hydrouoric acid HF

Commercially available cleaning chemicals may contain

corrosion inhibitors, that can create an electrical isolating

layer on the electrodes. This will result in a high scaling

signal after cleaning and a degraded performance of the

sensor.

Removing a sluice sensor

Maximum pressure during withdrawal: 5 bar

1. Unscrew the nut while holding back the sensor to

avoid a violent push-out.

2. Let the sensor move out under control until the stop.

3. Close the ball valve.

4. Unscrew the sensor from the sluice chamber.

Mounting a sluice sensor

1. Check the O-ring for damage before remounting the

sensor.

2. Open the ball valve

3. Insert the sensor and tighten the 1” nut.

Sensor type 4216 4223 4226

Length (mm) 248 228 338

MANUAL 17

3. oPeRAtIon Manual Series 3300

3.Operation

3.1 Keyboard and display

Keyboard:

Measurement display:

Service display:

Menu display:

• OK:

Switch from measurement display to menu display.

Accepting a menu selection, or value.

• esc: Returning from menu or submenu.

• Up and down ▲▼:

In menu: To navigate up and down in the menu.

When entering text or numerical value: Changing value.

• Left and Right◄►:

To navigate in a menu line to a position for modication.

• Metso:

Selects measurement display or service display

• Line 1: Active set-up and Set-up type

• Line 2: Recipe text

• Line 3: Alarm status

• Line 4: Process value

• Line 5: - -

• Line 6: Liquor temperature

• Line 1: TCU serial number and active set-up

• Line 2: Software version

• Line 3: Process value

• Line 4: Measured conductivity, uncompensated

• Line 5: Pt1000 value and liquer temperature.

• Line 6: Cell constant and cell constant mode

• Line 7: Current channel value and range

• Line 8: Voltage channel value and range

• Further menu description in section 3.2 and Appendix A.

18 MANUAL

Manual Series 3300 3. oPeRAtIon

3.2 Menu description

System

Settings in System menu are valid for all set-ups

Set-up select

Selects between Set-up 1, Set-up 2, Set-up 3, Set-up 4

and External.

Each set-up holds an individual set of values and selec-

tions.

Set-up 1, 2 and -3 are assigned to Concentration whereas

set-up 4 are assigned to standard conductivity.

For overview see appendix A.

External set-up selection is controlled from the digital

inputs, (See 2.4 Electrical connection.)

Set-up selection can also be controlled from HART.

Temperature adjust ↑↓

Correct the reading of measured liquor temperature by

pressing <UP> an <DOWN> keys. Adjustment range ±1°C

Contrast adjust ↑↓

Correct the display contrast by pressing <UP> and

<DOWN> keys.

Language

Select TCU language:

English, Swedish, Finnish, Spanish, or Portuguese.

Conductivity unit

Select between S/cm and S/m

Temperature unit

Select between °C and *F

Backlight

Selects between O and On

When set to O backlight it will be on for 20 seconds af-

ter each key pressed and it will be on for 30 seconds after

power-on.

A loop-powered TCU has no backlight.

Run mode

Selects between 1 second update or Fast update.

Controls how often a measurement is made.

In Fast update the TCU samples the sensor as fast as

possible. The sampling rate will be increased from 3 to 4

samples per second when “Manual cell constant” is used.

HART mode

Selects between Read/write, Read only, and O.

HART functionallity is optional and is only implemented

in TCU with type no. ending with letter H.

HART version

Also selects between HART version 6 and HART version 5.

This aects the response from command 0 and 15.

Poll address

Used from HART. Initial set to 0.

Passwords set

Sets the passwords for each submenu in the main menu:

System, Adjustments, Temperature Comp., mA Output

and Alarm. Each password is a 4 digit number.

A password of 0000 give free access. This is factory default.

If the password is forgotten press <LEFT> and <UP> at

the same time. This will clear the password.If password is

used on one or more menu points the System menu shall

also be protected to protect the password.

Adjustment

Settings in adjustment menu are valid only for actual

set-up

Adjust low

Adjust high

Only implemented in Concentration set-up.

See sec. 3,3 for adjustment procedure.

Cell constant mode

Selects between Automatic and Manual mode.

In Automatic mode the cell constant is read from the sen-

sor whereas in Manual mode a xed value is used. When

the mode is changed from Automatic to Manual the au-

tomatic value is transferred to the Manual value.

Manual cell constant can be used to reduce the sampling

period in Fast mode or to make an individual adjustment.

However, the automatic setting of cell constant is lost

when the sensor is exchanged

Cell constant value

Here a manual cell constant value can be entered.

Most sensors have a value between 0.17 and 0.24.

The conductivity reading is proportional with the cell

constant value .

Application

Only implemented in Concentration set-up.

Settings in Application menu are valid only for actual

set-up

Recipe

Select here between available recipes. see section 1.4.1

Unit1

Unit2

The text for the two text strings following the big PV

value can be changed.

Recipe text

The text in line 2 can be changed. The character set is:

Ááäçéêíñóô►◊µΩæÆøØåÅäÄöÖ !”#$%&´()*+,-./

0123456789:<=>?@ABCDEFGHIJKLMNOPQRSTU

VWXYZ[\]^_▲abcdefghijklmnopqrstuvwxyz◄¦►▼⌂

Restore setup

The actual setup is restored to factory defaults.

Temperature Compensation

Only implemented in Conductivity set-up.

Settings in Temperature Comp. menu are valid only for

actual set-up

Select the temperature compensation. See section 1.4.2.

Additionally it is possible to restore all values for actual

setup to factory defaults.

mA output

Settings in mA output menu are valid only for actual set-up

MANUAL 19

3. oPeRAtIon Manual Series 3300

Output select

• O

• Process value

• PV 0-x-∞ Only in conductivity menu

• Conductivity without temperature compensation

• Temperature

• Scaling

Low limit

High limit

Set the values for the selected variable for 4 mA and 20

mA output

For selection O the high limit sets a xed output current

with 0 as 4 mA and 100 as 20 mA. Low limit is not used.

PV 0-X-∞ compresses the output current according to the

formula:

Output current (mA) = χ / (χ + High limit) x 16 + 4

where χ is the process value PV. Low limit is not used.

Alarm

Not implemented in loop-powered version

Settings in Alarm menu are valid only for actual set-up

Alarm select

• O

• Process value

• Conductivity without temperature compensation

• Temperature

Alarm type

• Maximum NO

• Maximum NC

• Minimum NO

• Minimum NC

NO: Relay contact open during non-alarm, closed during

alarm

NC: Relay contact open during alarm, closed during not

alarm

Relay coil is powered when contact closed.

Hystrese: 1% of value, 0.5° for temperature

Alarm limit

Alarm display ash

Valid for all set-up modes with line-powered TCU

Selects between O and On

If set to On an alarm condition will make the backlight

ash.

Autoclean

Not implemented in loop-powered versions

Settings in Autoclean menu are valid for all set-up modes.

The Autoclean function controls the wash sequence of

Autoclean Sensor type 4397. Alarm relay is used for acti-

vating ushing. The normal setting of Alarm 1 is ignored.

mA output 1 is frozen during the ush and hold time.

3.3 Adjusting the TCU

Adjusting for concentration

Calibration is the procedure of entering new endpoints

for the low and high end of the basic TCU range. This is

done from the menu points Adjust lo and Adjust hi. If no

calibration has ever been done since the application was

selected, the Adjust lo will have a value equal to the low

endpoint, and the Adjust hi a value equal to the high end-

point, of the basic TCU range. Selecting an application,

or reselecting the actual application, will overwrite any

adjustments with the default values.

To perform an adjustment, proceed as follows:

• Grab samples from the process stream and read simulta-

neous display readings of the TCU

• Analyze the sample in the laboratory to get chemical

values.

• Read the actual value of Adjust lo and Adjust hi.

• Plot the Laboratory values (y) versus the TCU readings (x).

• Calculate the linear regression line.

• Calculate (or read from the graph) the estimated labora-

tory values corresponding to the actual value of Adjust lo

and of Adjust hi.

• Go to the menu point Adjust lo and Adjust hi and enter

the estimated values.

Spreadsheet 91511.xls helpful to do the calculations.

Example

Application 194.61 (20-40 % NaOH)

Since no adjustment has previously been done, actual

value of Adjust lo was found to be 20, and actual value

of Adjust hi was found to be 40

Assume the following data are collected:

The linear regression gives the equation:

y = 0.88492 * 4.87653

By entering 20 resp. 40 for x in the formula, the following

low-end and high-end values are obtained:

Adjusting lo (x=20) 22.575

Adjusting hi (x=40) 40.273

TCU reading (x) Lab. values (y)

24.0 g/l 26.3 g/l

27.7 g/l 28.9 g/l

30.9 g/l 32.1 g/l

29.2 g/l 31.0 g/l

32.3 g/l 33.6 g/l

20 MANUAL

Manual Series 3300 3. oPeRAtIon

Adjusting for STD conductivity

When the TCU is set up for STD conductivity it can be

adjusted by using Cell Constant in manual mode. The

conductivity reading will be proportional with the Cell

Constant value. The factory cell constant will be restored

when Cell constant mode is set to automatic.

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Metso 3300 Series User manual

Brand: Metso

Model: 3300 Series

Type: User manual

Metso 3300 Series

The TCU has two 4-20 mA current outputs, a display, and a keypad. The line-powered version has two relays for alarms.

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Metso 3300 Series User manual

Metso 3300 Series User manual

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