YOKOGAWA DO400 Instruction Manual

Instruction

Manual

MODEL 00400

Dissolved Oxygen

Converter

EX

(

(

YOKOGAWA +

1M 12J681-E-H

3rd Edition, April 1994

CONTENTS

Chapter Description

......... ... ...... ... ...... .......... ..... .... ...... ....... .......... ... .....-.... ....

Page

COMPONENT DESCRIPTION AND CONTROLS .................................................... Front cover

CONTENTS ............................................................................... .

Front cover

1. INTRODUCTION

1-1. Application .....................................................................................

1-2. Required components for DO measurement .............................................................

2. TECHNICAL SPECIFICATIONS

2-1. General technical specifications ...................................................................... 2

2-2. Functional description ............................................................................. 3

2-3. Functional description of the EXA 00400 instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4

3. INSTALLATION AND WIRING

3-1. Installation and dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5

3-2. Opening the instrument ............................................................................ 7

3-3. Wiring of power supply ........................................................................... 10

3-4. Wiring of output signals and contacts ................................................................. 11

3-5. Wiring of sensors ............................................................................... 12

4. COMMISSIONING

4-1. Operation overview.............................................................................. 15

4-2. Setpoints adjustment ................................. SETPOINTS ............................... 16

4-3. Output range adjustment .............................. RANGE................................... 18

4-4. Set up HOLD function ............................... SET HOLD ................................ 20

4-5. Activating the WASH timer ............................ WASH.................................... 22

4-6. Sensor selection and diagnostics .................................................................... 25

5. MAINTENANCE

5-1. Air calibration ......................................

5-2. Water calibration ....................................

5-3. Manual calibration ...................................

5-4. Selecting a value to display ............................

5-5. Hold during maintenance ..............................

AIR CAL ..................................

H20.CAL .................................

MAN CAL .................................

DISPLA Y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

HOLD................................... .

26
28

30

32
34

6. TROUBLE SHOOTING

6-1. Introduction .................................................................................... 37

6-2. Error messages and their meaning ................................................................... 38

7. SERVICE (Specialized routines)

SERVICE

40

USER DATA SETTINGS

Stickers .................................................................................... Back cover

1M 12J6B1-E-H

CONTENTS

Chapter Description . ...... 0' ............... .0'. O' .0. ..................... 0'. .0. ........ ................... '0' .... O. O.

Page

COMPONENT DESCRIPTION AND CONTROLS .................................................... Front cover

CONTENTS

............................................................................... .

Front cover

1. INTRODUCTION

1-1. Application .....................................................................................

1-2. Required components for DO measurement .............................................................

2. TECHNICAL SPECIFICATIONS

2-1. General technical specifications ...................................................................... 2

2-2. Functional description ............................................................................. 3

2-3. Functional description of the EXA 00400 instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4

3. INSTALLATION AND WIRING

3-1. Installation and dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5

3-2. Opening the instrument ............................................................................ 7

3-3. Wiring of power supply ........................................................................... 10

3-4. Wiring of output signals and contacts ................................................................. 11

3-5. Wiring of sensors ............................................................................... 12

4. COMMISSIONING

4-1. Operation overview.............................................................................. 15

4-2. Setpoints adjustment ................................. SETPOINTS ............................... 16

4-3. Outut range adjustment .............................. RANGE................................... 18

4-4. Set up HOLD function ............................... SET HOLD ................................ 20

4-5. Activating the WASH timer ............................ WASH.................................... 22

4-6. Sensor selection and diagnostics .................................................................... 25

5. MAINTENANCE

5-1. Air calibration ......................................

5-2. Water calibration ....................................

5-3. Manual calibration ...................................

5-4. Selecting a value to display ............................

5-5. Hold during maintenance .............. .,. . . . . . . . . . . . . . .

AIR CAL ..................................

H20.CAL .................................

MAN CAL .................................

DISPLA Y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

HOLD................................... .

26
28
30
32
34

6. TROUBLE SHOOTING

6-1. Introduction .................................................................................... 37

6-2. Error messages and their meaning ................................................................... 38

7. SERVICE (Specialized routines)

SERVICE

40

USER DATA SETTINGS

Stickers .................................................................................... Back cover

1M 12J6B1-E-H

OUTPUT

HOLD

FLAG

FAIL

FLAG

-/888

""lUfH ~~~

MESSAGE

DISPLAY

KEY PROMPT

FLAGS

(

/

SELECTION KEYS

YES: ACCEPT

SETTING

NO : CHANGE TO

NEW

SETTING

(

YES

NO

)

(

)

~

1\

) ( )

\ .

ADJUSTMENT KEYS

::: CHOOSE DIGIT

FOR ADJüSTMENT

A: ADJUST DIGIT

(TO DECREASE PASS

THROUGH ZERO)

ENT: ENTER NEW

VALUE

MODE

SELECT MODE

MEASURE/MAINTENANCE

CAN BE USED

TO ESCAPE

PROGRAM AT

ANY TIME

MENU POINTER

FLAGS

*

CONTACT OUTPUTS

LEOS SIGNAL THE

STATUS OF THE CONTACTS

c

c

MENU FOR

MAINTENANCE

FUNCTIONS

SEE CHAPTER 5

MENU FC'R

COMMISSIONING

FUNCTIONS

SEE CHAPTER 4

SELECT MODE

MEASURE/COMMISSIONING

(

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1. INTRODUCTION.

1-1. Application

The EXA 00400 is a mains powered

transmitter intended for use in industrial

outdoor or indoor installations. It has full rain

and dust protection even during

maintenance. It's small housing makes it the

ideal instrument for replacements in the field

or in existing panels. For best results the

sensor should be located in the vicinity of the

transmitter.

Power can be supplied from most AC or DC

sources. The four supply options make it a

real universal unit. As all operating

parameters are stored in non-volatile

memory there is no danger when power

drops occur. It also gives the user maximum

flexibility by programming the instrument in

advance and then installng it with the correct

parameters later. The instrument has several

safety procedures incorporated in the

softare. In addition to that a watch-dog

timer will always return the instument to the

normal operating status after heavy

interference or power drops.

The microprocessor in this instrument is

further used for continuous sensor diagnosis,

flexible on site commissioning, advanced

output relay functions and fine tuning..

In géneral a measuring loop for dissolved

oxygen in water can be set up for a number

of purposes:

To be part of a total process control

system (i.e. DC-system).

To indicate dangerous limits of a

process.

To monitor water quality.

To function as a simple controller for an

aerating system.

1-2. Some required components for a

dissolved oxygen measuring loop

A. a dissolved oxygen sensor with

integrated temperature sensor.

B. a fitting for the above sensor.

C. the EXA 00400 transmitter with

universal mounting bracket.

D. an AC or DC power supply (230, 110,

24 V AC or 24 V DC).

E. peripherals: e.g. strip-chart recorder,

panel indicator, PID-controller, PLC-

system or digital control system.

F. control equipment: e.g. aerator or air

injection system.

G. cleaning equipment.

1M 12J6B1-E-H

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2. TECHNICAL SPECIFICATIONS

2-1. General technical specifications

A. Measuring Range:

DO

Temperature

o - 20,0 mg/1.

o to 50°C (30 to 120°F)

B. Transmission Signals 0 - 20 mA DC or 4 - 20 mA

DC, isolated from input but not

from Voltage signal; maximum

load 6000.

2 0 - 1 V, isolated input but not

from mA signal; minimum load

1 kO.

C. Transmission Range both signals are user program-

mable within the measuring

range of DO and temperature

(OC/oF), a fixed span of the

temperature range is 50°C

(100°F).

both signals together can be

held (fixed or last value) during

main-tenance (e.g. calibration)

and wash.

D. Contact Outputs:

1. Alarm:

Contacts

Status

Alarming

2. Wash-Contact:

Status

1M 12J6B1-E-H

2 independent process or control

alanm contacts (S1, S2).

high and/or low alarm.

on/off alarm with adjustable

hysteresis and delay time.

t

predefined as a wash-timer with

adjustable wash, interval and

relaxation time for controllng the

wash cycle.

- reprogram

mabie as an alarm

contact (S3).

3. FAIL Contact

Status

Notes

E. Contact Input

F. Power supply

Voltage

Consumption

G. Climatic Conditions:

Ambient temperature

Storage temperature

Relative humidity

Weather protection

signalling a fault of the

measuring loop.

all contacts are potential-free

SPST contacts.

- LED indicates for all contacts

(LED is on if the contact is

closed and power is on). Only

Fail contact is closed if power is

off.

- switch capacity:

250 V AC, 5 A max. 100 W.

250 V DC, 5 A max. 50 W.

suitable for a remote potential-

free contact triggeri ng of the

wash-cycle.

- contact open: no triggering if

impedance ;: 100 kO.

- contact closed : triggering if

impedance c: 10 0

110VAC (:t20%), 50/60 Hz.

230V AC (+ 15%/-20%), 50/60 Hz.

24V AC (:t20%), 50/60 Hz.

24V DC (-30%/+20%).

maximum 8,5 VA.

-10 to +55°C

(10 to 130 OF).

-30 to +70 °C

(-20 to 160 OF).

10t090%.

rain and dust-tight IP65,

(NEMA 4X).

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H. Display

Type

Main display

Message display

Flags

i. Keys

J. Housing:

Body material

Window

Colours

Cable glands

Terminals

K. Mounting possibilties

L. Shipping details

Dimensions

Package

Weight

M. Safety & Security:

Data protecton

Watchdog timer

Automatic safeguard

Interference tes:

Power down

3

Custom Liquid Crystal Display

3l digits; 12,5 mm high

6 alpha numeric characters; 7 mm high.

status indication

6 keys operated through flexible window

with tactile feedback + 1 access key

hidden behind the front cover.

cast aluminium with epoxy coating

flexible poly-carbonate

moss-green/off-white.

5 polyamide glands PG13.5

for maximum 2,5 mm2 cable

universal mounting kit available for

panel, wall or pipe mounting

- suitable for standard DIN sized panels

(144 x 144 mm)

144x144x131 mm

225 x 225 x 220 mm

approximately 2,5 kg

non volatile memory (EEPROM) manipu-

lation passcode protected

checking the microprocessor

return to measurl¡iment when no key is

pushed for 10 min.

EMI class B

- RFI less than 2% at 5 Vim for 0,1 to

1000 MHz. both tests according to

IEC 801.

no effect; reset to measurement.

2-2. Functional specifications

A. Input Specification:

current amplifier.

B. Calibration:

air and water calibration, zero

calibration.

C. Temperature measurement:

suitable for measurement with

temperature sensor depending on

sensor type

D. Temperature compensation:

automatic between -10 to + 50°C.

E. Salinity compensation:

according to ISO-5814 table.

F. Slope adjustment:

40 to 200 % of the sensitivity of an

ideal sensor.

G. Performance:

with simulated input

Accuracy Linearity Unit

Output 0,2

0,1

mgli or ppm

:t 0,02 mA

Temperature 0,1 0,1

°C or OF

:t

1 mV

1M 12J6B1-E-H

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2.3. Functional description of the EXA

00400 instrument

The EXA 00400 is a real-time microprocessor

operated transmitter system. It uses a

dedicated micro-controller with exclusively

developed softare to perform all functions

necessary in such a system. The input and

output functions are concentrated in the

analogue section of the instrument. Even these

functions are operated through special

interfaces designed to give a minimum of

interference problems to the digital functions.

The digitl and logic functons, including the

energising of the output relays, are designed to

operate securely. The instrument features two

separate analogue output signals to industry

stndards.

The outut contacts are voltage-free relay

switches which can be used as simple process

alarms or to control a process. The EXA gives

you two pre-defined process alarms (one high,

one low), a wash contact and a "FAIL"-

contact. All contacts are signalled on the front

by red LED's.

The unique "FAll-contact gives a warning

when the system has found a fault in the

measuring loop. The wash-contact is designed

to control the cleaning of the sensor on site. It

is driven by the wash-timer.

By using non-volatile memory (EEPROM) for

the essential information the operating

parameters are fixed in memory without the

need for a battery.

1M 12J6B1-E-H

The softare for the EXA system is designed

with the user in mind. It uses a simple step by

step, question and answer style to

communicate with the operator by giving

messages on the second line of the display and

also indicating which keys should be pressed in

a special display field.

The user-interface is simplified to a basic set of

6 keys' accessible through the flexible window

cover. The keys are scanned continuously and

actions are taken immediately. An extensive

checking of limiting values and parameters is

implemented in the softare. When limits are

exceeded, an error message is shown on the

display and when significant for the reliability

the FAIL-contact is switched too.

The transmitter can be powered from AC or

DC voltages. The AC voltage has wide

tolerances (+ 15%/-20%) e.g. the 230 Volt

version can be powered from sources between

176 and 264 Volt at 50 or 60Hz.

The 24 Volt DC version is included to facilitate

mobile installation or powering from batteries.

The rugged housing is designed for outdoor

use (IP 65). In addition to that it is shaped in a

way that indoor panel mounting is also possible

(DIN size 144 x 144 mm). The optional

mounting brackets are used for all mounting

methods.

The commissioning of the instrument can be

performed on site or in advance. A three level

operating system keeps the approach clear and

distinguishes between every day operation and

maintenance against one time operations like

commissioning and fine-tuning. All this makes

the EXA 00400 operate like a normal

analogue transmitter with a number of

additional functions. These extra functions are

only possible by using a micro-controller at the

heart of the system.

FEATURES:

Built-in barometric air pressure compen-

sation

Simplified calibration in air or water

Simple range adaptation

Accurate temperature measurement with

Pt1 000

Accurate temperature compensation

algorithm

A HOLD function for the outputs

Output contacts for alarming or process

control

Dual analogue output signals: mA and mV
Built-in wash timer for cleaning purposes

Protection against unauthorized access to

the Maintenance, Commissioning or

Service level by a passcode.

Programmable salinity compensation.

3. INSTALLATION AND WIRING

3-1. Installation and dimensions

c

3-1-1. Installation site

As the transmitter has full weather protection, it

can be installed outdoors as well as indoors. It

should, however. be installed within the distance

given by the cable length to the sensor.

Select an installation site where:

mechanical vibrations and shocks are

negligible;

no relay or power switches are in the direct

environment;

the transmitter is not exposed to direct

sunlight or severe weather conditions;

maintenance activities are possible (no

corrosive atmosphere).

The ambient temperature and humidity should be

within the limits of the specifications.

f

3-1-2. Mounting methods

The EXA 00400 transmitter has universal

mounting possibilities:

Panel mounting using the optional brackets.

Wall mounting using th optional brackets.

First the brackets are fixed to the housing,

then put fixing screws through the brackets

into the wall.

Pipe mounting using the two optional

bracket, on a horizontal or vertical pipe

(diameter between 40 and 70 mm).

The following drawings show these mountilig

methos in detaiL.

5

PANEL MOUNTING

144(5.67)

~

144

*

(5.67)

~

M6

~

tI

24

1

(1)

'"

~

MOUNTING BRACKETS

Panel Cut-Out

and Spacing

16.5

(0.65)

~ ~5ni~ï5 --

CUT.OUT:: l38 x i 38

. tr$-

~.

T.. 0 .u'"''''''

115.5

(4.55)

Minimum
195 (7.75)

100

Unit: mm (inches)

Figure 1.

1M 12J6B1-E-H

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WALL AND PIPE MOUNTING:

Unit:mm (inches)

Wall Mounting

T

0

-1=

--

144 (5.67)

200 (7.87)

0

-1

0

L '" "'"

0

0

~

Pipe Mounting Pipe Mounting

(Vertical) (Horizontal)

/'::::

I-T

I I

I I

I I

I I

I --

I I

I I

I

Figure 2.

1M 12J6B1-E-H

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3.2. Opening the instrument

The procdure for opening the EXA 00400 is

described in the most convenient way. If

connections are to be made to the contact outputs

or power terminals the screening plate must be

removed. As the input terminals are located above

the output contact terminals. it is not advised to

connect wires to them with the input cables in

place.

f

Therefore we recommend to use the following

sequence (see fig.3):

1. Remove the cover of the EXA 00400 by

loosening the 4 captive screws.

2. Swing the display board to the left like a door.

3. The upper terminal strip is now visible.

Remove the screen plate covering the lower

terminal strip.

4. Start by connecting the power and contact

outputs. See the instructions in §3-3 and

§3-4. Use the 3 glands at the back of the

housing (see fig.4).

5. Replace the screen plate over the lower

terminals.

6. Connect the analogue output and sensor

cables. See the instructions in §3-5. Use the

2 glands at the front of the housing (see fig.4).

7. Swing back the display board and switch on

the power. Commission the instrument to your

needs.

8. Close the instrument by refiting the cover.

7

HINGE

FRONT

(SEE INSIDE

COVER)

SCREWS

(4)

GASKET

WINDOW

Figure 38.

1M 12J6B1-E-H

8

Figure 3b.

1M 12J6B1-E-H

DIGITAL BOARD

WITH LCD

AND KEYS

ANALOGUE

IN AND OUTPUT

TERMINAL

GLANDS (5)

"'

9

Glands to be used lor cabling

f

l§ l§ I

Ii~ ! (§ : ~11'

i i I I I I

-,

I
I

if i ~ L____n__

I : : L.__________

I i L.______

I i

i ..----l

--,

I

,
I
I

,
I

Figure 4.

(

Figure 5. Grounding

Figure 6. Glands

1M 12J6B1-E-H

10

3.3. Wiring of the power supply

3-3-1. General precautions

Do not activate the power supply yet.

First make sure that the power supply

conforms to the specifications given (see §2

item F). Remove the front cover by

unscrewing the 4 captive screws. Then

check the type-plate on the instrument for

the correct supply voltage.

Local regulations may ask for an external

circuit breaker to be installed. The

instrument is protected internally by a fuse

with one of the following ratings:

230 V AC - 63mA, 24 V AC - 0.5A

110 VAC - 100mA 24 VDC - 1.0A

The internal fuse is located next to the

power terminals.

3-3-2. Access to the terminals

The terminals numbered 1, 2 and 3 from

the bottom connection strip are used for the

power supply. Guide the power cable

through the nearest gland in the housing.

The terminals accept wires of maximum 2.5

mm2. Use cable finishing if possible.

Connect the wires as indicated in the wiring

diagram (fig. 7).

Connect terminal

1 to the phase ("hot" line

of the AC power and terminal 2 to the zero

line. In case DC power is used, terminal 1

should be connected to the positive outlet

and terminal 2 to the negative outlet (see

fig.7).

Terminal 3 is for the power ground. This is

separated from input ground by a galvanic

isolation.

1M 12J6B1-E-H

3-3-2a. Grounding the housing

To protect the instrument against

interference the housing should be con-

nected to ground by a large area conductor.

This cable can be connected to the back of

the housing using a braided wire cable with

a lug. Put a shake proof washer under the

lug to improve the contact to the housing.

3-3.3. Switching the instrument on

After all connections are made and checked,

the power can be switched on from the

power supply. Observe the correct activation

of the instrument at the display. After lighting

all segments the EXA D0400 might display

an error E7, E8 and/or E9. In the case of E7

either the setting of the instrument will

display a value or the sensor connections

have to be checked. When E9 is displayed

the cell current is outside the range of 0 -20

¡i due to a load up of the celL. Wait some

minutes for stable value. If for any reason

this does not solve, consult the trouble

shooting section §6-1 before calling

Yokogawa service department.

After installation of the sensor it may need

several hours to stabilize readings.

Stabilisation can take up to 24 hours.

LE

I 1

o

Figure 7.

+

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3-4. Wiring of the output signals and

contacts

.

3-4-1. General precautions

The analogue output signals of the EXA

00400 transmits low power standard

industry signals to peripherals like control

systems or strip-chart recorders.

The contact output signals consists of

voltage-free relay contacts for switching

electrical appliances. They can also be

used as digital outputs to signal status to a

digital system or PLC.

The only contact input is for a remote

starting of the wash timer. see §3-5-4.

It is possible to use multi-core cables for

the contact in and output signals and

shielded multi-core cable for the analogue

signals.

f

3-4-2. Contact outputs

The 4 contact outputs can be wired after

your own preferences. You can either use

them to switch AC or DC power or

voltages.

Two contact outputs (S1, S2) can be

used as process alanms or to control the

process. The first contact (S 1) is

programmed for a high alarm and the

second contact (S2) for a low alarm. The

functioning of the contacts can be

programmed from the service level §7-12.

As the switching capacity of the built-in

relays is limited, it is advised to use power

relays to switch heavy appliances. The

third contact (WASH/S3) is pre-defined as

a wash timer, controlling the cleaning of

the sensor.

11

An input is provided for a remotestart of the

wash cycle. It is possible to program the third

contact as a procss alanm of controlling

function too.

See §7 -13 for programming the other

functions. The settings for the wash timer are

programmed from the maintenance level

§4-5.

The fourt contact (FAIL) is reserved to

signal a malfunctioning in the measuring loop.

The contact is also closed when the

instrument is not powered (fail safe). Always

connect the FAIL- contat to an alarm device

(e.g. lamp, signal horn, alarm panel) to use

the fault detection possibilities of the EXA

00400.

Action

S1, S2,

FAIL

W ASH/S3

Power OFF

-- -

-.--

Power ON

-- -

-- -

No alarm

/

Power ON

-.--

-.--

Alarm

Figure 8.

A multi-core cable with 5 to 8 cores for these

on/off functions will be sufficient.

3.4.3. Analogue output signals

The first output signal consist of an active

current signal of eiter 0..20 mA or 4..20 mA.

The maximum load can be 600 n including

the cable resistnce.

The second output signal consists of a voltage

signal of 0..1000 mV. The input impeance of

the receiving instrument should be more than

1 kn.

It is highly recommended to use shielded

cables for the output signals. Terminal 63 is

used to connect the shielding of the cable.

Wiring diagram

31

72

WASH

S3

FAIL

Figure 9.

1M 12J6B1-E-H

12

3-5. Wiring of sensors

3-5-1. General precautions

Generally speaking, transmission signals

from the dissolved oxygen sensor to the

transmitter are very low power, high

impedance level signals. Thus a lot of care

must be taken to avoid interference.

Before making connections to the

transmitter, make sure the next conditions

are met:

The sensor cable is not mounted in

tracks or duct together with high

voltage or power switching cables.

Only standard sensor cale is used.

The transmitter is mounted within the

distnce of the sensor cable (maxi-

mum length is 20 metre).

The setup is kept flexible for easy

insertion and retraction of the sensor

in the fitting.

3-5-2. Connection of the sensor cable

Connecting the sensor cable through the

gland located in the front right of the

instrument. The weather-tight gland should

be fasened hand-tight only.

Connect the wires of the sensor cable to

the terminals as shown in the wiring

diagram.

1M 12J6B1-E-H

3-5-3. Liquid earth

The diagnostic features include a membrane

integrity check.

This requires a Liquid Earth connection to

terminal 16.

Under service code 60 this function can be

activated.

3-5-4. Connecting the remote contact

Input for wash cycle

The terminals numbered 17 and 21 are

used to connect a remote push-button

switch. When the switch is closed the wash

cycle will start (if activated). See §4-5 for a

full description.

The switch should be closed for at least

0.25 second to make the EXA 00400

sense it is closed. After that time it must be

opened again.

21 117

LJ

Figure 10. Remote contact input

..

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Connection Diagram DOX8SM Sensor

IE T1 T2

RE

Grey

Connection Diagram PB30 Sensor

IE T1

T2 RE

Gr = Green,

Rd = Red,

Wt = White,

Bk = Black

YI =Yellow

Br = Brown

1M 12J6B1-E-H

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4. COMMISSIONING

4.1. Operations overview

Routine

Use

Chapter

MAINTENANCE

AIR CAL

Calibration in air

5-1

Operation by keys

through the

H20 CAL Calibration in saturated water

5-2

closed cover

MAN CAL

Manual calibration

5-3

DISPLA Y

Check or show additional values

5-4

HOLD

Switch hold function on/off

5-5

COMMISSIONING

SETPOINTS

Adjusting the setpoints for the contacts

4-2

Operation by '-key when cover is

RANGE

Adjusting the output range

4-3

removed

SET HOLD

Activating the hold function

4-4

WASH

Activating the wash timer

4-5

SERVICE

SERVICE

Fine tuning the performance

7

Operation by coded

entry from

commissioning

Note: All 3 levels can be separately protected by

a passcode. See §7-18.

1M 12J6B1-E-H

16

4-2. ADJUSTING THE SETPOINTS

11. ACCESS SETPOINTS

~

SETPOINTS

Jl SfTP

(!~

RANGE

$ET HOLD

WASH

SERVICE

YES

NO

MODE

*

CJ

CJ

CJ

0

Remove cover by releasing 4 screws.

I MODE I

ESCAPE TO MEASURE can be used at

any stage to abort operation. WARNING:

If the HOLD function is activated the

instrument returns with the question HOLD

(flashing); answer YES or NO or MODE

again to return to measurement.

1M 12J6B1-E-H

2. SELECT WHICH SETPOINT TO

ADJUST

~SE

N

Jl Sf TP I (!~

RANGE

SET HOLD

WASH

SERVICE

YES

NO

MODE

*

CJ

CJ

CJ

0

Display will show' SETP1

Note: SETP 1 is for the contact output

marked S1; SETP2 for S2.

From the factory S 1 is

programmed as a high alarm

function at 19.5 mg/1.

S2 is programmed as a low alarm

function at 0.5 mg/1.

To change the functioning of output contacts

refer to §7-12 & 13.

To 'Change the WASH contact into a third

alarm contact S3 se §7-13.

In this case the display will show SETP3.

..

13. ADJUST THE SETPOINT VALUE

saa

~ SETPONT

Jl SfTP lL£in~

NG

WASH

SERVICE

YES

NO MODE

*

CJ

CJ

CJ

0

The display will show the actual setting

) II

'I

.,

1. Adjusting the setpoints

In general the contact outputs of the EXA

D0400 can be used to signal extraordinary

situations in the process.

The alarm contacts are switched if the

comparison of the changing process value

to a fixed setpoint meets the condition of the

alarm function (higher or lower). These

setpoints are programmed in this section.

One of the advantages of a micro-processor

instrument is, that it is fairly simple to

change the function of the contact outputs.

It is possible to use the contacts for simple

process control functions.

The adjustment of the setpoints for these

control functions are also accessed from

this section.

The setting of the control type and

parameters are accessed through the

service level at §7-12 to 7-15.

li

The settings of the WASH-contact are

described in §4-5. If this contact is

programmed to function as an alarm contact

the setpoint is added to this menu.

The function of the FAIL-contact cannot be

changed. It is signalling faults in the

measuring loop to e.g. a

connected control panel or control room. It

is recommended to always connect the

FAIL-contact because it overrules all

other signals from the EXA 00400. In

addition it is possible to activate a special

22 mA and 1100 mV signal on the output

when FAIL is on (see §7-5).

4-2. ADJUSTING THE SETPOINTS

17

2. How does it work?

As an example we will describe what

happens when the process value exceeds the

high alarm setpoint of S1.

When the process value rises above the

setpoint of S 1, the delay time of the relay

contact starts. After the delay time has

passed the LED lights and the relay contact is

switched on.

When the process value goes down again,

the value must be below the setpoint minus

the hysteresis. After the delay time has

expired the LED and the relay are switched

off.

The hysteresis (sometimes called "dead-

band") and the delay time are programmed

from the service level at §7-14.

These parameters are intended to mask the

effects of sudden peaks in the process value

and the mechanical characteristics of

solenoids.

The hysteresis works on one side of the

setpoint only. For a high alarm it is below the

setpoint; for a low alarm it is above the

setpoint.

3. Process control with output contacts

The EXA D0400 incorporates a simple

process control function.

Control function is: on/off control in combi-

nation or activated by the alarm function.

In this case the programmable setpoint,

hysteresis and delay time of the alarms give

you the possibility to set up a simple control

function.

1M 12J6B1-E-H

18

4-3. RANGE ADJUSTMENT

11. ACCESS RANGE

SETPOINTS

lRRN5E~~

RANGE

SI!T HOW

WASH

SERVICE

YES

NO

1I0DE

*

~

~

~ 0

112. ADJUST LOW SPAN DO VALUE

aDD

SETPONT

1

øo i ~

RANGE

/ 0 wrn~

SET HOL

WASH

S RV

YES

NO MODE

*

~

~

~

0

Display will show' 0%

113. ADJUST HIGH SPAN DO VALUE

laDD

SETPOINTS

iIØØ%wrn~

RANGE

SET HOLD

WASH

SERVICE

YES

NO

1I0DE *

~

~ ~

0

Display will show' 100%

U

Ii

I MODE I

ESCAPE TO MEASURE can be used at any stage to abort operation. WARNING: If the HOLD function is activated the

instrument returns with the question HOLD (flashing); answer YES or NO or MODE again to return to measurement.

1M 12J6B1-E-H

'"

1. What is the range?

The display will always show a measured

value between 0 and 20 mg/l.

The output signal is a linear function of mA

or mV against DO and is fixed by two points.

The output signals are fixed to 014 to 20 mA

and 0 to 1 Volt. The beginning and ending
points of the range (indicated by 0% and

100%) have to be programmed.

The factory setting of the output signal is a

full range of 0 to 20 mg/l for both signals.

Any value between 0 and 20 mg/iis

acceptable for both points. A minimum span

of 1 unit must be kept.

An error E19 will point to not acceptable

values.

NOTE: The "near output signal

is limited

to 20.5 mA or 1.025 V to give a

safety area of 2.5% at the high

end of the output signaL. Values

above 20.5 mA or 1.025 V are not

related to input values and signal a

malfunction.

4-3. RANGE ADJUSTMENT

2. How to adjust?

Simple example:

The EXA 00400 has to be programmed for

a range of 5 to 15 mg/l.

Adjust 0% to 5.0 mg/l

Adjust 100% to 15.0 mg/l

The instrument will now correct its calcula-

tions for the output signal accordingly.

19

3. Calculation example

The current (mA) at the output is calculated

as follows:

mA=

DO

-DOmin

-DOmin

x20

DOmax

(for 0 to 20 mAl

of

DO -DOmin

DOmax -DOmin

(for 4 to 20 mAl

x16 + 4

mA=

DO

DOmin

DOmax

DOmax - DOmin

actual measured value

value at 0%

value at 100%

span (~ 1 DO)

It is advisable to choose a span dividable by

10.5 or 2 for easy reading on scales.

4. Further possibilties

Set a 22 mA and 1.1 Volt signal on the

output, when FAIL is on, see §7-5.

1M 12J6B1-E-H

20

11. ACCESS HOLD ROUTINE

I

ETPONTS

IHOLll

~~

NOe

~ SET HOLD

ASH

SERvice

YES

NO

MODE

*

c:

c:

c:

0

*HOLD Set HOLD function

I MODE I

4-4. SET UP THE HOLD FUNCTION

112. ACTIVATE HOLD FUNCTION

SI!TPOI NT.

IHOFF

~~

RANG I!

SET HOLD

WASH

8ERVIC

YES

NO

MODE

*

c: c:

c=

0

Display shows actual status

*H.OFF = Hold not active

*H.ON = Hold activated

*H.FIX = Hold fixed value

*H.LST = Hold last value

113. SELECT VALUE TO HOLD

IHOLDI

f2ll II

SETPONTS

IHmR

RANG I!

wm~

SET HOLD

WASH

aEAYICI!

YES

NO

MODE

*

c:

c:

c:

0

(

*H.mA Fixed mA-value

*H.mV Fixed mV-value

f

ESCAPE TO MEASURE can be used at any stage to abort operation. WARNING: If the HOLD function is activated the

instrument returns with the question HOLD (flashing); answer YES or NO or MODE again to return to measurement.

1M 12J6B1-E-H

1. What is HOLD?

HOLD IS a function freezing the output

signals temporary. during normal

maintenance. preventing all sorts of alarming

situations to occur.

Two possibilities are generally used:

a. Keeping the output at the last value

(H.LST) Just before the start of

maintenance. This should be used when

recording and not controlling

instruments are connected to the output

signals.

b. Keep the output signals at a preset

value (H.FIX) which will not cause any

action to be taken by a connected

controller.

This is the preferred situation when

dealing with DO-control by an external

PID-controller.

In both situations the alarm contacts will

switch off. Only FAIL will remain active.

From the factory the HOLD function is not

activated.

l

4-4. SET UP THE HOLD FUNCTION

21

2. How does it work?

The HOLD-function has to be activated

from the commissioning menu (SET HOLD)

before it can be used.

The EXA D0400 will keep both outputs

frozen during the following events:

. Access to the commissioning menu

('-key).

. Access to either of the calibration

modes.

. Switching it from the maintenance

menu (MODE-key)

HOLD iS signalled in the display by a

special flag.

The operator is prompted to switch HOLD

on or off before returning to normal

measurement.

3. Example

In an aeration tank the dissolved oxygen

concentration has to be kept within certain

levels.

Activate the HOLD function and choose the

fixed output value.

The span was set for 5-15 mg/I and the

output signal for 4-20 mA.

Thus 10 mg/I = 12 mA. Adjust the preset

value for the output at 1 2 mA.

During the maintenance the output will be at

12 mA = 10 mg/1.

4. Auto return

Hold can be de-activated after 10 minutes if

no key iS pressed. To activate this function

see §7-7.

1M 12J6B1-E-H

22

11. ACCESS TO THE WASH.

TIMER

-

lWR5H

l!~

anPOINTa

RANce

lf

.

~

sERvice

YES

NO

MODE

*

c:

c:

c:

0

. WASH Wash (cleaning)-timer

See note 1 on next page.

I MODE I

113. ADJUSTING THE WASH.TIMER

235

-

1 L WmJf

aETINTa

~

win~ .

lI

~

~

YES

NO

IIODE

*

c:

c:

c:

0

(

4.5. ACTIVATING THE WASH-TIMER

112. ACTIVATING THE WASH.TIMER

-

lWDFF

l!~

&IEPOINT&

~

lf

.

~

~

YES

NO

IIODE

*

c:

c:

c: 0

The display shows actual status

'W.OFF Wash-timer switched off

'W.ON = Wash timer switched on

After switching the wash-timer ON you will

have to set the timer values or accept

previously programmed values.

The WASH-timer will start either when the

remote switch is closed or the interval time

has run out.

See note 2 on next page.

Display shows in sequence;

il.hr:lnterval time between wash cycles in

hours

iW.min: Wash time in minutes

iR.min: Relaxation time after wash time

in minutes

l

See note 3 on next page.

ESCAPE TO MEASURE can be used at any stage to abort operation. WARNING: If the HOLD function is activated the

instrument returns with the question HOLD (flashing); answer YES or NO or MODE again to return to measurement.

1M 12J6B1-E-H

Note 1: The WASH-timer IS driving the

contact output and can be remotely

started with the contact input, if

activated.

Pressing MODE during an active

WASH cycle will return the

instrument to measurement

immediately (no relaxation time).

From the factory the WASH

function is not activated.

Note 2: It iS highly recommended to

activate the HOLD-funclion when

the WASH function is used. This is

necessary to get the output

contacts in a safe position during

the WASH cycle. If HOLD iS not

activated, the output contacts will

be in an undefined state during

WASH. In some cases this is

unacceptable; it is up to the user to

decide on this point.

l

Note 3: During the activity of the wash

timer the display will show

.W ASH" on the second Iine and the

W ASH LED will light. During the

relaxation time the display will still

show *WASH., while the WASH

LED goes off.

In both cases the output signals will

be on HOLD, if this function was i

activated from the commissioning

menu.

23

1M 12J6B1-E-H

24

1. What is the WASH-timer?

The EXA 00400 has a built-in WASH-timer

driving a contact output for a cleaning device.

In many DO measurements it is necessary to

clean the sensor from time to time to prevent

pollution of the DO sensitive parts of the

sensor. Aside from the necessary manual

maintenance it often is a returning duty to

keep the 00400 loop in operation. The EXA

00400 makes it possible to relieve you from

this tak in using the wash- timer for an

automatic cleaning of the sensor.

The operation of the WASH-timer splits into

2 sections:

Automatic wash controlled by the timer

Automatic wash initiated by a remote

start

The WASH-timer is activated or de-activated

from this menu.

The remote start is triggered by the closing of

a pushbutton contact connected to the

remote input of the EXA 00400.

The WASH cycle is started only when the

EXA 00400 is in measurement (i.e. when

the pointer is at MEASURE and no FAIL or

HOLD is active), in all other'cases the wash

is postpned until measurement resumes.

If a FAIL occurs during wash, the WASH

cycle will be finished first. You can abort the

WASH by pressing the MODE key.

Note: If the third contact is not used for

WASH, the entry is skipped.

1M 12J6B1-E-H

4-5. ACTIVATING THE WASH.TIMER

2. How does it work?

The timer inside the EXA 00400 has 3

separate settings.

The actual cleaning time is called the

wash-time (in minutes). The interval time is

the time between each cleaning action (in

hours).

The relaxation time (in minutes) is a

recuperation period for the sensors after

cleaning has taken place and normal

measurement can be restored. During both

wash-time and relaxation- time the output

signals and contacts are put on HOLD (if

activated).

The wash time and relaxation time can be

set from 0.1 to 10.0 minutes in 0.1 minutes

(6 seconds) increments.

The interval time itl.hr) can be set from 0

to 36.0 hours in 0.5 hours (6 minutes)

increments.

Normally the timer will activate the cleaning

cycle after each interval time has run out. If

you want to clean the sensor in between,

use a remote contact to start the cleaning

cycle. For connection see §3-2-5.

3. Example

The DO measuring system is suffering from

a grease-film deposit on the sensor.

A cleaning nozzle is fitted in the fitting,

spraying the sensitive parts of the sensor.

Normal tapwater is used for cleaning.

The dosing pump feeding the tapwater to the

spray-nozzle is switched by the WASH

contact of the EXA 00400 transmitter.

Depending on your application the wash-time

and relaxation-time are determined at 30 sec.

and set The interval-time is set for 6 hours

(giving 4 cleaning sequences a day).

(

Note: using the wash-timer is only

applicable in combination with the

DOX8HS submersion type fitting.

l

4-6. SENSOR APPLICATION AND

DIAGNOSTICS

The input circuits of the EXA 00400 are

conceived for the DOX8SM and the PB30

sensors. These sensors use a lead (Pb)

anode and a silver cathode. These materials

generate a voltae difference which can be

used to measure the reaction of dissolved

oxygen in water diffused into the reaction

chamber.

The sequential current flowing is directly

proportional to the amount of oxygen present

in the procss. This current is measured

along with the temperature and recalculated

into the correct value to display.

The difusion of oxygen through the FEP

diaphragm covering the sensor determines

the speed of response of the sensor. As the

reaction progresses lead-oxyde (PbO) is

formed and dissolved again in the KOH

electrolyte in the sensor. Therefore it is

recommended to replace the electrolyte in

the sensor every 6 to 8 months.

.\

SelectinQ a temperature sensor.

The EXA 00400 has been set at the factory

for a PB36 temperature sensor.

Service code

11 can be utilised to calibrate the

temperature readout.

Setting the instrument for Pt1 000 or other

temperature elements is from the service

level at §7-2.

The DOX8SM sensor has an integrated

PB36 thermistor.

Sensor checking during 30 seconds at 180

seconds interval time.

25

On and off-line checks

The EXA D0400 features several checks

during measurement (on-line) and during

calibration (off-line). The checks warn the

user when limits for the use of the sensor

are reached.

The checks can be individually switched on

or off in Chapter 7 -17

Off-line checks

The first check is the zero check. The cell

should not generate a current in an oxygen

free solution. If it does generate a current,

an error message E2 is given. Refer to the

troubleshooting section for further help.

The second check is on the slope of the

sensor in use. The calibration in water or in

air gives an indication of the sensitivity (in

pAmg 02J of the sensor. The value is set

in the Service chapter.

The check warns if the sensitivity is less

than 40% or more than 200% of the

normal value. This is signalled by an error

message E3.

As a separate check during calibration of

the floating ball sensor PB30 the signal is

checked on stability. The stbility criterium

'is set in the Service section. The response

check is indicated by error message E1.

On-line checks

The third check is possible with the floating

ball sensor PB30. This sensor has an

external contact to measure the impedance

between the Ag-electrode and this external

contact. By this check rupture of the

membrane can be detected. The impedance

is checked for a high value. If a low

impedance is found an error message E4 is

generated. When applying the immersion

type fitting DOX8HS, the sensor side of this

loop must be grounded to the measuring

liquid with a liquid earth pin.

Salinity compensation.

In order to take the effect of salinity into

account for oxygen measurement an average

chloride concentration can be programmed.

The chloride concentration value is set

manually via the service level.The EXA

00400 takes account of the effects of

salinity and temperature simultaneously.The

advantage of this construction is that the

result of the measurement is available

immediately.A separate conversion table is

not necessary. During wet calibration

procedure the salinity of your calibration

solution should be in correspondence with

the salinity of the process.

Barometric air pressure compensation.

A built-in air pressure sensor automatically

compensates for barometric influences.

1M 12J6B1-E-H

26

5. MAINTENANCE SECTION

11. ACCESS AIR CALIBRATION

5-1. AIR CALIBRATION

12. CALIBRATION

555

RIRfRL ~~

YES

~

NO

~

MODE

~

Air.cal = air calibration

MODE

r=

i e51

Note: The value shown on the display can

deviate from the real value. This is fixed after

calibration is completed.

MODE

555

MEASURE

5TRRT

~~

AIR.CAL

H20.CAL

DISP Y

YES

NO

r=

MODE

c=

~

c=

e51

Start start air calibration procedure

Display shows WAIT and flashes, while the

instrument searches for stable measurement.

.

113. END CALIBRATION

f

MODE

555

MEASURE

fRL.ENJJ~~

AIR.CAL

H20.CAL

DISPLAY

YES

r=

NO

MODE

c=

~

~

e 51

Cal. end end of calibration

After confirming the end of calibration, the

new slope is checked to be within limits. If

not, an error message E3 will be

displayed.

(

I MODE I ESCAPE TO MEASUREMENT can be used at any stage to abort operation. WARNING: If the HOLD function is activated the

instrument returns with the question HOLD (flashing); answer YES or NO or MODE again to return to measurement.

1M 12J6B1-E-H

.,

l

l

l

27

1. What is air calibration?

Air calibration is the usual procedure of

calibrating a 00 measuring loop. This

corrects the slope of the sensor (sensitivity).

Zero pOint calibration is unnecessary.

During this calibration procedure the sensor

should be kept 5-10 cm above the water

surface; preferably in a bucket.

The relative Humidity here is approx. 100%.

From Henry's law the concentration of

oxygen in a liquid is proportional to its activity

provided that the temperature and

composition of the liquid remain constant.

During the air-calibration mode, this

instrument prompts the operator to remove

the sensor from the water, checks the signal

for stable conditions and then calibrates.

The new calibration is then checked and a

warning is given if values are unacceptable.

During calibration the output will be frozen if

the HOLD function was activated.

With this procedure the specifications can be

met. General calibration

interval is one month.

This depends very much on your application.

Start with a calibrationinterval time of 2

weeks. If the slope is OK, start calibration

after 3 weeks and so on. Until you see that

the slope deviates too much and remain at

your last found calibration

intervaL.

Do not exced long interval during seasonal

influences

5.1. AIR CALIBRATION

2. How does it work?

A. The instrument asks to start the air-

calibration.

B. The sensor is taken out of the water.

C. The display will show "WAIT" when

the instrument is waiting for a stable

value.

O. The display will show CAL.ENO when

a stable value is reached.

E. Push YES to end the session.

F. If the new slope is within limits the new

values are calculated.

The instrument automatically returns to

measurement after 1 hour.

If no keys are pressed for 1 hour and the

calibration was not finished the instrument

will return to measurement with the old

calibration values and E 1 is set. If HOLD

was activated the instrument will return to

measurement after 10 minutes.

3. Example.

Standard calibration procedure.

Take the sensor out of the water. Rinse

the sensor with water before calibration to

avoid incorrect values. Wipe the

membrane surface carefully with a tissue.

Temperature differences between process

conditions and air can result in longer

waiting times to get a stable value.

Press YES at CAL.ENO and the EXA

00400 is calibrated.

Insert the sensor into the process again.

This procedure can take up to 60 minutes,

especially in strong wind or when water

temperature deviates strongly from air

temperature.

1M 12J681-E-H

..

28

11. ACCESS TO H20 CALIBRATION

MODE

555

MEASURE

H20fRL (!~

AIR CAL

H . AL

D'S

r;

YES

NO MODE

~ ~

~

OS1

H20 Cal. = calibration in water

5-2. H20 CALIBRATION

12.100% CALIBRATION

MODE

555

MEASUR

'øøo I (!~

IReAL

H20.CAL

, I 0

DISPLAY

HOLD

YES

NO

r;

MODE

~ ~

~

OS1

100% calibration in saturated water

Wait for a stable value. Display shows WAIT

and flashes while instrument searches for

stable value.

Cal.end = end of calibration

113. ZERO CALIBRATION

MODE

aaa

MEASURE

ØO I ~~

AIR.CA

H20.CAL

10

DISPLAY

r-

YES

NO

CONTACTS

MODE

~

c=

~

. S1

0% calibration in oxygen-free solution

Wait for a stable value. Display shows

WAIT and flashes while instrument

searches for stable value.

Cal.end = end of calibration

After confirming the end of calibration the After confirming the end of calibration the

new slope is checked to be within limits. If new slope is checked to be within limits. If

not, an error message E3 will be displayed. not, an error message E2 will be displayed.

ESCAPE TO MEASUREMENT can be used at any stage to abort operation. WARNING: If the HOLD function is activated

the instrument returns with the question HOLD (flashing); answer YES or NO or MODE again to return to measurement.

I MODE I

1M 12J6B1-E-H

r

,

i

\

T

I

1

(

,

l

it

29

1. What is H20 calibration?

Calibration in water iS executed with a

solution saturated with air or without oxygen

as calibrating solution. This method is used

for measurements in seawater or brine, for

calibration by chemical analysis, or for

calibration of the readout of dissolved oxygen

in percent of saturation. Also when there is a

big difference between ambient temperature

and process temperature; this will reduce the

time for a stable value.

2. How does it work?

A Take the sensor out of the process.

B. Put the sensor in a bucket with a

solution completely saturated, with air.

C. The display will show WAIT when the

instrument is waiting for a stable value.

D. The display will show CAL.END when a

stable value is reached.

E. Push YES to end the session.

F. If the new slope is within limits the new

values are calculated.

5-2. H20 CALIBRATION

3.100% calibration

Use a solution fully saturated with air as

calibration solution.

Place the sensor into a beaker filled with

water, bubble and stir up the water.

Wait until the value is stabilised, press

YES at CAL.END and the EXA 00400 is

calibrated.

Re-install the sensor into the holder and

the process after calibration is finished.

4. Zero calibration

To perform zero calibration a liquid without

oxygen is needed. Prepare a Na2S03

(sodium sulphite) solution by pourrng

approx. 100 ml of tapwater into a beaker

and adding approx. 3g Na2S03 into the

water and fully dissolve it.

Take the sensor out of the process and

rinse it. Put the sensor in the Na2S03

solution and press YES; wait till the value

on the display stabilizes. CAL.END will be

displayed then.

After pressing YES the transmitter will

calculate its new slope. If it is not OK, an

error message E2 will be generated.

1M 12J6B1-E-H

30

5-3. MANUAL CALIBRATION

11. ACCESS MANUAL CALIBRATION

MODe

RtJ.fRL ~~

yes

~

r=

i .$1

NO

~

MODe

~

MAN.CAL = Manual calibration

12. ADJUST VALUE MANUALLY

MODe

Lf5B

MEASU

STRRT

AIReA

~~

H20.CAL

MAN. AL

DISPLAY

~

YES

NO

CONTACTS

MODe

~

~

~

.$1

Display shows measured value

START = Start manual calibration

NOTE:

Temperature is shown in the

second line.

113. END CALIBRATION

I~~

MEASURE

fRL.EtJJJ~~

AIR.CAL

H20.CAL

DISPLAY

HOLD

NO

CONTACTS

yes

MODe

~

~

~

.$'

t

CAL.END End of calibration

Error E19 indicates manual calibration is

not acceptable.

(

I MODE I

ESCAPE TO MEASUREMENT can be used at any stage to abort operation. WARNING: If the HOLD function is activated

the instrument returns with the question HOLD (flashing); answer YES or NO or MODE again to return to measurement.

1M 12J6B1-E-H

1. What is manual calibration?

Manual calibration or process calibration is

the calibration executed with a freshly taken

sample from the process.

This sample is then measured with an off-

line instrument and the value obtained is

programmed into the EXA 00400

transmitter.

Manual calibration can be used for

calibrating the sensors with a solution

specially made for this purpose.

Note:

This routine can also be used to

calibrate with two points as an

alternative to automatic calibration

e.g. occasional use of not

programmed buffers.

There is no programmable buffer.

No automatic Calibration.

5-3. MANUAL CALIBRATION

31

2. How does it work?

A. Take a sample from the process

B. Measure the DO with an off-line DO-

meter which has been previously cali-

brated and is equiped with an

automatic temperature compensation.

C. Adjust the value of the in-line EXA

00400 transmitter to the measured

value.

O. Any values outside the normal

operating range of the instrument are

signalled by Error 19.

3. Example

The EXA 00400 indicates a process

value of DO 6.54 at 25°C.

A freshly calibrated portable DO-meter

inserted into a sample reads 6.62 DO at

25°C.

The value is adjusted to the process value

at manual calibration to bring the values in

agreement.

1M 12J6B1-E-H

32

5-4. SELECTING A VALUE TO DISPLAY

11. ACCESS DISPLAY ROUTINE

MODE

Me su

JJISP

AIR.CAL

(!~

H . AL

DISPLAY

i:

YES NO

MODE

C=

C=

C=

e.'

DISP Display routine

I MODE I

12. READ DATA

MODE

MEASUR

2ØLfOf(!~

AIR.CA

01 PLAY

i:

YES NO

MODE

C=

C=

C=

e.'

The second line of the display will show the

possibilities

°C

%

mA

mV

SI

ZR

Rei

Parameter

temperature

saturation

output signal
output signal

slope (%)

zerocurrent (¡.)

softare release

113. REPROGRAM DATA DISPLAY

MODE

MEASUR

2 ø Lf 0 f (!~

IReAL

H20 CAL

DISPLAY

i:

YES

NO

MODE

C= C=

C=

e .,

(

The second line of the display will show

the possibilities

°C

%

mA

mV

Si

ZR

Rei

Parameter

temperature

saturation

output signal
output signal

slope (%)

zerocurrent (¡.)

softare release

(

ESCAPE TO MEASUREMENT can be used at any stage to abort operation. WARNING: If the HOLD function is activated

the instrument retums with the question HOLD (flashing); answer YES or NO or MODE again to return to measurement.

1M 12J6B1-E-H

33

1. What is the display routine?

The second line in the display is intended to

be used to:

Show actual status

Show messages

Show errors

When delivered from the factory the EXA

00400 shows the temperature on the

second line.

You can make the instrument show a

different parameter on the second line by

selecting it from the list at right.

5.4. SELECTING A VALUE TO DISPLAY

2. What can you read?

Span and zero values are shown to indicate

the DO concentrations in relation to the

cellcurrent (span expressed in %; zero in

¡i).

The choice of temperature units is done

from the Service leveL.

The release version is an indication for the

servicing of the instrument and cannot be

fixed in the display.

mg/l; ppm; % Sat are units for actual

values, but displayed on a separate sticker.

mA "' Actual current output

mV = Actual voltage output

3. Example

To check the value of the output signal (4

to 20 mAl it is displayed on the second

line.

Suppose the measuring range is 5 to 15

mg/l and the mA signal is 4 to 20 mA.

The process value of 10 mg/l will then

lead to an output value of 12 mA.

When the second line is changed to

display the mA output signal, this value is

visible all the time.

Whenever HOLD is activated the mA

value on the display is frozen to the

programmed value (using the FIXED

setting).

Pressing MODE will take you back to

measuring and the preset value in

DISPLA Y will show again.

1M 12J6B1-E-H

34

5-5. USE OF HOLD FUNCTION DURING MAINTENANCE

11. ACCESS HOLD

MODE

HaL JJ

, ,

::(!~::

, ,

YES

c:

NO

c:

MODE

c:

r=

i ..,

HOLD = Hold output function

12. SWITCH HOLD ON/OFF

¡HOLDI

:'HaL JJ~ ~(!~~

, ,

YES

c:

NO

c:

MODE

c:

MODE

(

Display will blink HOLD and YES/NO

r=

i · 51

Note: This function can only be used if

activated during commis-sioning

(see §4-4).

f

I MODE I

ESCAPE TO MEASURE can be used at any stage to abort operation. WARNING: If the HOLD function is activated the

instrument returns with the question HOLD (flashing); answer YES or NO or MODE again to return to measurement.

1M 12J6B1-E-H

35

1. What is HOLD?

Hold is a function which freezes the output

signal temporarily, it is normally used during

maintenance activities when the sensor is

removed from the process to prevent

unwanted controller reaction.

The HOLD function must be commissioned

from the programming menu before it can be

switched on or off. See commissioning the

hold function for more details §4-4.

5.5. USE OF HOLD FUNCTION DURING MAINTENANCE

2. How does it work?

From this level the HOLD function can only

be switched ON or OFF.

HOLD is switched on when you press YES

when HOLD blinks.

When you press NO HOLD is switched

OFF.

A flag is kept in memory and an indication

is made in the upper left corner of the

display field.

The HOLD function influences all output

signals. This means that the output contacts

are switched off and no alarming takes

place. The FAIL function is still active.

The operator is prompted to switch HOLD

on or off after having performed a

maintenance function.

3. Example

During maintenance or washing the

HOLD function is switched on to prevent

the controlling instruments (including the

EXA 00400) from running wild.

After cleaning HOLD is switched off again

and DO control resumes. '

1M 12J6B1-E-H

36

(

(

1M 12J6B1-E-H

6. TROUBLESHOOTING

6-1. Introduction

The EXA 00400 microprocessor analyser

continuously monitors the condition of all key

components of the measuring system to

ensure that measurement is dependable. If a

fault is detected this is signalled immediately.

A maximum of 2 errors can be shown in the

display at the same time by a code preceded

by an E.

The table at the right-hand page shows the

errors in numerical sequence, gives a

possible cause and a suggested remedy. The

remedy for each fault is given very short.

Process conditions determine what action

can be taken to correct errors. As the actual

situation may vary, it is not possible for us to

give you a full solution for all cases. If you

have any problem or question please consult

your nearest YOKOGAWA sales or service

organisation for assistance.

Faults indicated with an asterisk n also

trigger the FAIL-alarm contact and can thus

be detected from a distance.

37

It is also possible to activate a special output

signal (22 mA and 1.1 V) in FAIL conditions.

After calibration the calculated zero and

slope are checked to see if these are still

within the Iimits specified in the softare.

Under normal conditions the zero will not

deviate. A decrease of the slope could

indicate a decrease of sensitivity due to

fouling of the sensor. The temperature

sensor, which is built into the DO sensor is

checked to detect damage or faulty

connections.

Note: A temperature fault may be caused by

incorrect programming of the sensor

type at §7- 4

The transmitter checks the membrane for a

low impedance to know if it has been broken

or perforated.

Whenever the instrument is being program-

med or calibrated, data is checked and an

error is shown when not correct. Should this

occur, the new programmed data is rejected

and the instrument continuous to work with

the previous settings.

1M 12J6B1-E-H

J

38

6-2. Error messages and explanation

Code

Error description

Possible cause

Suggested remedy

E1"

Response check failed

No stable value within 1 hour

Check if sensor connections are tight

Possible fouling

Repeat the calibration procedure

Correct programmimg

E2

Zero out of limits.

Sensor is fouled

Clean sensor

Diaphragm is damaged

Replace diaphragm

E3

Slope out of limits

Sensor is fouled

Clean sensor

Diaphragm is damaged

Replace diaphragm/electrolyte

E4"

Membrane failure

Membrane perforated

Replace membrane

E7"

Temperature high error (;. 50°C)

Process temperature too high

Correct settings (§7-4)

Wrong sensor programmed

Check connections and sensor

Temperature sensor damaged

ES"

Temperature low error (oe O°C)

Process temperature too low

Correct settings (§7-4)

Wrong sensor programmed

Check connections and sensor

Temperature sensor damaged

E9"

Cell current abnormal

No sensor connected

Connect sensor properly

Cable broken

Replace broken cables

Instrument start-up (cell

load up)

Wait for a stable value

Value;. 20 mg/I

Value;. 200 % sat.

1M 12J6B1-E-H

(

(

39

Code

Error description

Possible cause Suggested remedy

E10. Eeprom write failed

Fault in electronics Power off/on and re-enter data

If not successful call your nearest

YOKOGAWA office.

E12. Excessive value Salinity wrong programmed

Re-calibrate

Temperature outside range

DO value not correct

E15

Temperature cable resistance can not be Temperature inaccuracy Check connections or program correct

adjusted

Exceeds limits sensor type

E17

Span on mA or mV output too small

Incorrect programming by user.

Correct programming

(e: 10°C)

E19 Entered value not acceptable.

Incorrect programming by user. Correct programming

E20.

Instrument not initialised Initial setting lost. Call your nearest YOKOGAWA office

E21.

Check sum of Eeprom not OK

Fault in electronics. Call your nearest YOKOGAWA office

When errors appear which are not mentioned in this list, please consult the YOKOGAWA service organisation. A maximum of 2 errors can be

indicated at the same time.

· These errors will trigger the FAIL-output.

1M 12J6B1-E-H

40

7. SERVICE MODE

7-1. Introduction

Generally speaking there is no necessity to

adjust the settings of the service section. All

parameters are pre-programmed to values

(so-called defaults) enabling you to start

working immediately.

(

~

The advanced functions available through

this section are only needed in some specific

applications. This fine-tuning of the instru-

ment gives a superior performance over

analog 2-wire instruments.

If a function has to be adjusted it is called-up

with the code mentioned. Having selected the

code gives you the possibility either to

activate or adjust the values for this function.

After this you wil return to the entry point to

make other adjustments or go back to the

measuring status.

If errors are made during the programming

process, these will be indicated, no action will

be taken and you can start the programming

again.

(

1M 12J6B1-E-H

41

Matrix servicecodes

Group

Code

Display

Use Chapter

A. PROCESS CHARACTERISTICS

1

'SAL.TY Salinity

7-3

B. SENSOR CHARACTERISTICS

10 'TSENS Temperature sensor 7-4

11 *T.ADJ Temperature adjust

7-5

12 'ICELL Sensor current

7-6

C. DISPLAY OPTIONS

20 *DISP Display unit

7-7

21

*T.CODE Temperature function 7-8

D. ANAL. OUTPUT COMMISSIONI

30

*BURN

Signalling of Fail condition on output

7-9

31 *mA Current signal output

7-10

32

*T.OUTP

Temperature output 7-11

33

*DAMP Demping response

7-12

E. CALIBRATION FUNCTIONS

40

'tn.SEC Stabilisation check

7-13

'L:mgll

41

-0%

Zero calibration

7-14

42 *ZERO Zero + slope setting

7-15

'SLOPE

F. CONTACT OUTPUT 50 'S1

Function of contact 1

7-16

51 'S2

Function of contact 2 7-16

52 'S3

Function of WASH contact

7-17

53

'D.TIME

Settings for the proces alarm function

7-18

*HYST

G. SELF DIAGNOSTICS

60 *CHECK Sensor checking

7-19

H. AUXILLIARY FUNCTIONS

70 'RET Auto return

7-20

71 i *PASS Password protection

7-21

72 "ERASE Restore default settings

7-22

I

Î

1M 12J6B1-E-H

42

11. ACCESS SERVICE

-

1 SERV

~~

SET~INT.

RANGE

~

.

~

SERvice:

YES NO

MODE

*

C:

C:

c:

0

'SERV = Service settings

Note: If a password has been activated in

§7-21 you will see 'PASS on the

display after pressing YES. Enter the

correct code to gain access to the

service leveL.

7-2. ACCESS TO SERVICE SETTINGS

2. ENTER CODE TO SELECT

REQUIRED FUNCTION

1111

-

lfDJlE

.ET~INT.

RANGE

min~ .

~

~

~

YES

NO

IIDE *

C: C:

c:

0

Display will show 'CODE

13. ADJUST SETTING

/11

15RL.TYmin~

(

+

YES

C:

NO

C:

MODE

C:

*

o

Display shows current setting

Values adjusted access to individual

routine description.

(

I MODE I

ESCAPE TO MEASURE can be used at any stage to abort operation. WARNING: If the HOLD function is activated the

instrument returns with the question HOLD (flashing); answer YES or NO or MODE again to return to measurement.

1M 12J6B1-E-H

r

i

A. PROCESS CHARACTERISTICS

7.3. Salinity

ACCESS-CODE

: 01 (see §7-2 for

operation)

: . SAL.TY

: 0 no salinity

compensation

compensated for

salinit

DISPLAY

Adjustment

Explanation:

The solubility of oxygen in water with a

salinity of w(NaCI) in grams per kilogram is

found by subtracting the value w(NaCI) x

correction factor from the solubility of oxygen

in pure water, at the same temperature.

These salinity corrections are derived from

tables published by UNESCO and are

applicable to seawater or estuarine water.

According ISO-5814 : 1990. Setting the

code to 1 will activate the compensation for

salinity. The NaCI concentration in grams

per kilogram has to be entered and the EXA

D0400 automatically compensates for the

appropriate salinity.

Default: 0 no salinity compensation.

B. SENSOR CHARACTERISTICS

7-4. Temperature sensors

ACCESS-CODE : 10 (see §7-2 for

operation)

: "T.sENS

: 0 Pt1000

1 '" PB36

DISPLAY

Adjustment

Explanation:

The indication here determines which tempe-

rature sensor is connected to the instrument.

Check which sensor will be used in your

plant and set the correct number for it.

Yokogawa sensors are available with PB36

elements.

Default: 1 PB36

43

7.5. Temperature adjust

ACCESS-CODE : 11 (see §7-2 for

operation)

: "T.ADJ

Correction for cable

resistance.

DISPLA Y

Adjustment

Explanation:

The temperature measurement is a two-wire

resistance measurement. In this kind of

measurement the length of the connecting

cable can influence the accuracy of the

temperature indication. To compensate for

the extra resistance of the cable up to 2-5°C

(5°F) can be adjusted.

Connect the correct temperature sensor to

the EXA instrument and insert it in a stable

temperature bath of a known value. Check

the temperature indicated at this setting in

°C and adjust the value if necessary.

Now the EXA transmitter has been

calibrated to compensate for the cable

resistance.

Default: Adjusted for zero resistance.

1M 12J6B1-E-H

44

C. DISPLAY FUNCTIONS

7.6. Sensor current

ACCESS-CODE : 12 (see §7-2 for

operation)

: 'I.CELL

: programm calibration

cell-identification.

o 25 ¡im membrane

1 = 50 ¡im membrane

DISPLAY

Adjustment

Explanation:

The voltage generated by the electrode pair

is sufficient to generate a spontaneous

reduction of oxygen at the cathode, so no

external voltage source for this reaction is

required.

At 25°C and a membrane thickness of 25

¡im 10,0 mg/l dissolved oxygen corresponds

with a current of 7,47 ¡i.

At 25°C and a membrane thickness of 50

¡im 10,0 mg/l dissolved oxygen corresponds

with a current of 3,87 ¡i.

These current adjustments are fixed for slope

adjustment, used in the calibration

procedure.

Default : 1 = 50 ¡im membrane thickness.

1M 12J6B1-E-H

7-7. Display unit

ACCESS-CODE

DISPLAY

Adjustment

: 20 (see §7-2 for

operation)

: 'DISP

: 0 mg/l

1 ppm

2 % saturation

Explanation:

The default setting of 0 gives an indication in

units mg/l.

These units can be displayed with a separate

self adhesive sticker on the textplate.

When another unit is preferred the

appropriate adjustment can be done.

Default: 0 = mg/l.

7-8.Temperature function

ACCESS-CODE : 21 (see §7-2 for

operation)

: ''TCODE

0= temperature

display in °C

= temperature

display in OF

DISPLA Y

Adjustment

(

Explanation:

Setting the code to 1 will give a temperature

indication in degrees Fahrenheit (OF) on the

display only.

Setting the code to 0 will do the same for

indication of °C.

Default: 0

°C

(

r

(

7-9. Signalling of fail condition on

output

ACCESS-CODE : 30 (see §7-2 for

operation)

: "BURN

: 0 = OFF

1 =ON

At error conditions the output will be set at

22 mA and 1100 mV.

DISPLA Y

Adjustment

Explanation:

Besides an indication at the display in the

field. sometimes an indication of errors in the

control room is also necessary. This is

possible by sending a special signal over the

output cable to the receiving instrument. A

signal of 22 mA and 1100 mV is used,

because it is outside the normal analog

range. If at the receiving end an alarm is set

to the value represented by 22 mA or 1100

mV, it is obvious that the proper action can

be taken from the control room too.

The signal uses the same convention as

used in thermocouple indication named as

burn-out detection.

Default: 0 = OFF

Note: this signal is an addition to the

FAIL-contact and doubles its

action.

D. ANALOG OUTPUT COMMISSIONING

7.10. Current signal output

ACCESS-CODE : 31 (see §7-2 for

operation)

: "mA

: 0 = 0-20 mA

1 = 4-20 mA

DISPLA Y

Adjustment

Explanation:

The current output signal is determined by

the setting here.

The mA output and the fixed voltage output

(0 1 V) are a linear function against DO or

temperature (see setting at §7-11.).

The outputs are limited to a 2.5% over-

range (20.5 mA and 1025 mV).

The outputs can be programmed to give 22

mA and 1100 mV in a FAIL condition (see

§7-9.)

The output signal can be frozen at a fixed or

the last occurring value at the SET HOLD

routine §4-4.

Default: 1 = 4-20 mA

Note: When changing the current signal

output from 0-20 mA to 4-20 mA

check if a fixed value at SET

HOLD is within the new output

signal range.

45

7.11. Temperature output

ACCESS-CODE : 32 (see §7-2 for

operation)

: "T.OUTP

: 0 = No temperature

output;

DO on both mA

and V output.

1 = Temperature on

V output;

DO on mA output

2 = Temperature on

mA output;

DO on V output

Fixed temperature range for the output signal

0-50 °C.

DISPLAY

Adjustment

Explanation:

The actual process temperature can be

switched to one of the analog output signals.

If the Volt signal is used, the DO will be on

the mA output and vice versa.

Default: 0 = No temperature output

1M 12J681-E-H

46

E. CAUBRA nON FUNCTIONS

7-12. Damping response

ACCESS-CODE : 33 (see §7-2 for

operation)

: 'DAMP

: Enter the desired

damping time for

analog output (0-120

seconds).

DISPLA Y

Adjustment

Explanation:

If the Dissolved Oxygen concentration of the

measurement changes suddenly, and you

use these measured values directly to

control operations, problems (eg. frequent

turning ON/OFF of operations) might occur.

To avoid such situations. you introduce a

modified time constant into the operation in

order to smooth out the signal variations.

You can set a time constant of up to 120

seconds.

Default: 0 no damping time.

1M 12J6B1-E-H

7-13. Stabilisation check

ACCESS-CODE : 40 (see §7-2 for

operation)

: 't; T.SEC and .t;mg/I

: Criteria for automatic

calibration stabilisation

time and DO in mg/1.

DIS?,_AY

Adjustmönt

Explanation:

The criteria for deciding whether a value has

stabilised during calibration is set in the

factory to a rate of O.OS mg/I during 300

seconds. Depending on the specific needs of

your sensor system this parameter can be

changed. Please keep in mind that changing

both values will not always change the

criteria i.e. 0,01 mg/I '" 300 S.; 0,02

mg/I '" 600 s. etc. If the system has not

stabilised an ERROR E1 will be generated.

Default: O.OS mg/I, 300 seconds

Note: t;mg/I or t;ppm or t;%sat is

displayed depending on settings in

service code 20.

,

7-14. Zero calibration

ACCESS-CODE : 41 (see §7-2 for

operation)

: '0%

: 0 '" Not activated

1 '" Activated

DISPLA Y

Adjustment

(

'1

Explanation:

To perform zero calibration a liquid without

oxygen is needed. Prepare a 3% Na2S03

(sodium sulphite) solution for this action.

(See §S-2.)

Default: 0 '" not activated

(

r

7-15. Manual adjustment of

SLOPE

ACCESS-CODE

DISPLAY

ZERO and

Adjustment

: 42

: 'ZERO

'SLOPE

: Set the value of the

zero current and slope

To adjust zero current,

acces code 41 should

be activated.

Explanation:

The EXA 00400 can be programmed

manually for a slope deviation from its

nominal value (%), and a zero sensor output

at 0 mg/l.

The "ZERO" is the output of the sensor

which is generated in an oxygen-free

solution.

The slope is the sensitivity of the sensor in

percent of the nominal value.

This allows (pre)calibration of the sensor in a

lab or workshop.

To adjust the zero current, access-code 41

should be activated.

Defaults: ZERO = 0 pA

SLOPE = 100%

(

F. CONTACT OUTPUT

47

7.16. Functioning of contacts S1 and S2

ACCESS-CODE : 50 and 51 (see §7-2

for operation)

: 'S1 and S2

: 0 = Not activated

1 = Low process

alarm

2 = High process

alarm

DISPLAY

Adjustment

Explanation:

The settings determine the function of the

first or second output contact S1 (code 50)

or S2 (code 51).

If the first digit is either a 1 or 2 the contact

is activated and the setpoints can be

adjusted in the SETPOINTS menu (see §4-

2).

Default: 50 = 2

51 = 1

7-17. Functioning of the WASH contact

ACCESS-CODE : 52 (see §7-2 for

operation)

: 'S3

: 0

1

DISPLA Y

Adjustment Not activated

Low process

alarm

High process

alarm

WASH contact

2

3 =

Explanation:

The third contact output is used for the

WASH timer. It can be programmed to

function like the other two contact outputs by

changing the first digit into a 1 or 2.

(See §7-16.)

The functioning of the WASH-timer is

explained in §4-5.

All settings are done from the "I ASH menu

in commissioning leveL.

Default: 3 = WASH

Note: If the third contact output is

programmed as a process alarm

the WASH entry in the

commissioning menu is skipped

and SETP3 can be set from the

SETPOINT menu (§4-2).

1M 12J6B1-E-H

48

for the process alarm

7-18. Settings

function

ACCESS-CODE

DISPLA Y

Adjustment

: 53 (see §7-2 for operation)

: "DTIME and "HYST

: Setting the delay time (in

seconds) and hysteresis (in

mg/I)

Explanation:

The delay time is counted from the moment the

process value has passed both setpoint and

hysteresis. (see Fig.1).

The setting of one hysteresis value (in mg/I) and

delay time is made from this entry. This setting is

valid for all contacts (S1, S2 and S3).

In the case of a low (high) process alarm contact

the hysteresis is added to (subtracted from) the

setpoint value before action is taken.

Defaults: 2 s. delay time

0.1 mg/I hysteresis

1M 12J6B1-E-H

t

DO

Setpoint

Figure 11.

LED off

~

Delay-

time

I
I
I

i i

I I

I I

I I

I i

LED on: i LED off

i ~

I I

. I

~

Delay-

time

t (sec.)

(

~."

.

(

r

G. SENSOR DIAmlOSTICS

(

7.19. Sensor checking

ACCESS-CODE : 60 (see §7-2 for

operation)

DISPLAY : "CHECK

Adjustment

0-- Zero checking inactive

1--

Zero checking activated

-0-

Slope checking inactive

-1-

Slope checking active

--0 Impedance checking inactive

--1

Impedance checking active

((

Explanation .'

The default setting of 0.1.1. has one function

disabled. Each digit controls one function;

O=OFF; 1 =ON.

The first (left hand) digit controls the zero

checking function. This checks whether the

sensor output at 0 mg/I is calculated at OpA

after calibration of the instrument. If not

ERROR E2 is generated.

The second (middle) digit controls the slope

checking function. This checks whether the

calculated slope after calibration is within

the limits of 40 to 200% of the nominal value

of 7,47 pA at 25°C. This value corresponds

for a membrane thickness of 25 Ilm. A

membrane thickness of 50iim corresponds

with 3,87 pA nominal value.

If not ERROR E3 will be generated.

The third (right hand) digit controls the

sensor impedance checking function.

The DO sensor is checked for low

impedance between the Ag-electrode and a

liquid earth, to detect membrane integrity. If

the impedance happens to be low ERROR

E4 is generated.

Default: 0.1.1. = European modeL.

49

H. AUXILIARY FUNCTIONS

7.20. Auto return

ACCESS-CODE : 70 (see §7-2 for

operation)

: "RET

: 0 = OFF

1 =ON

Automatic return to measuring when no keys

were pushed for 10 minutes.

DISPLA Y

Adjustment

Explanation .'

As a safeguard against long maintenance

jobs or unauthorized pushing a button it is

possible to let the system return to its normal

function of measurement when no keys are

pushed for 10 minutes.

In calibration mode, autoreturn is 1 hour.

When you have activated HOLD and

entered a routine the system will return to

measurement after 10 minutes.

Default: 1 = ON

1M 12J6B1-E-H

50

7-21. PaS'sword protection by three

digit code

ACCESS-CODE

DISPLAY

Adjustment

: 71 (see §7-2 for

operation)

: 'P ASS

a --

Protection on Maintenance level

inactive

-.a.-

Protection on Commissioning

level inactive

-.-.a

Protection on Service level

inactive

# - -

Protection on Maintenance level

activated

-.#.-

Protection on commissioning level

activated

-.-.#

Protection on Service level

activated

Note: # can be a digit from 1 to 9, and it

will give a protection according to

the schematic below to the

programmed leveL.

0= No password

1 = Password is 111

2 = Password is 333

3 = Password is 777
4 = Password is 888

5 = Password is 123
6 = Password is 957

7 = Password is 331

8 = Password is 546

9 = Password is 847

1M 12J6B 1 -E-H

Explanation:

In some cases a protection of operation

levels is wanted. In this way unauthorized

access to any of the 3 levels can be blocked

by a simple password. When a password is

selected for an operation level, access to

that level can only be obtained after

entering the password. The display will show

a message 'PASS to indicate the entry of

the password.

Default: 0.0.0

No Password protection.

Note: For the Maintenance and Com-

missioning level the password

entry is always requested when

entering from the measure mode.

For the Service level the pass-

word entry is requested after

pushing the YES-key.

When the Service level protection

is activated, the password cannot

be changed by unauthorized

persons.

7-22. Restore default settings

ACCESS-CODE : 72 (see §7-2 for

operation)

ERASE

: YES = Erase all

programmed

values and

replace them

by defaults.

NO = Keep all

programmed

values as

before.

DISPLA Y

Adjustment

t

Explanation:

This entry is provided to make it possible to

Start from the default values given by

Yokogawa and thus erase all previously

programmed information.

WARNING:

Do not use this code without proper authority

as all settings and programmed functions will

be lost!!

(

51

1M 12J6B1-E-H

Coded service settings (Defaults)

CODE Function

Setting

CODE Function

Setting

1 SAL.TY

0 41

0%

0

10 T.SENS

1 42

ZERO

0

11

T.ADJ

-

SLOPE 100

12

I.CELL 1

50

S1

2

20

DISP

0 51

S2 1

21 T.CODE

0

52

53 3

30

BURN 0

53 D.TIME

0.2

31

mA 1

HYST

0.1

32 T.OUTP

0

60 CHECK

0.1.1.

33 DAMP

0 70

RET

1

40

t.sec 300

71 PASS

0.0.0

mg/I

0.05 72

ERASE

-

Coded service settings (User)

CODE Function

Setting

CODE Function Setting

1

SAL.TY 41

0%

10 T.SENS

42

ZERO

11

T.ADJ

SLOPE

12

I.CELL

50 S1

20 DISP

51

S2

21

T.CODE 52

S3

,

30 BURN

53 D.TIME

31 mA

HYST

32 T.OUTP

60

CHECK

33

DAMP 70

RET

40

t.sec 71

PASS

mg/I

72 ERASE

Coded service settings (User)

CODE Function

Setting

CODE

Function

Setting

1

SAL.TY

41

0%

10 T.SENS

42

ZERO

11 T.ADJ

SLOPE

12

I.CELL

50

Sl

20

DISP

51

S2

21

T.CODE

52

S3

30 BURN

53

D.TIME

31

mA

HYST

32

T.OUTP

60

CHECK

33 DAMP

70

RET

40

t.sec

71

PASS

mg/I

72

ERASE

Coded service settings (User)

CODE

Function

Setting

CODE Function

Setting

1

SAL.TY

41

0%

10

T.SENS

42

ZERO

11

T.ADJ

SLOPE

12

I.CELL

50

Sl

20

DISP

51

S2

21

T.CODE

52

S3

30 BURN

53 D.TIME

31

mA

HYST

32

T.OUTP

60

CHECK

33 DAMP

70 RET

40

t.sec

71 PASS

mg/I

72

ERASE

i

r

Stickers and Error Messages

With this manual two separate cards are delivered:

1. A sheet with 12 black and white stickers (64 x 30 mm) and 9

small stickers (10 x 20 mm).

2. A sheet with 4 stickers with ERROR MESSAGES.

\'

The large stickers from sheet 1 are intended to record pro-

grammed ranges and setpoints. The sticker can be placed on

the front of the instrument below the keys and is visible

through the window.

The small stickers from sheet 1 can be used, when the WASH

contact is programmed to function as a normal alarm. Stick it

over the lettering besides the LED indicators.

The stickers from sheet 2 are transparent and can be fixed to

any relevant surface or book as a reminder of the error mes-

sages.

The small stickers from sheet 2 can be placed on the front of

the instrument to remind the user his choosen unit.

YOKOGAWA .

EUROPEAN HEAOQUARTERS

Yokogawa Europe B.V.

Radiumweg 30. 3812 RA AMERSFOORT

The Netherlands

Tel. (31 )-33-641.611. Telex 79118

Teletax (31 )-33-631.202

,c.. AUSTRIA

i(g_i Yokogawa Austria Ges.m.b.H.

... Praterstraße 78/3/3

A-1021 WIEN
Tel. [phone]. Telex 135793 YEF A

Tele!ax (43)-1-216.52.9

'~!

'~i

BELGIUM

Yokogawa Belgium N.V./S.A.

Minervastraat 16
1930 - ZAVENTEM

Tel. [phone]

Tele!ax (32)-2-7253499

... ITALY

'~! YOkogawa Italia S.r.!.

.... Vicolo D. Pantaleonr. 4

20161 MILANO

Tel.

1391-2-646.49.41

Tele/ax 1391-2-6455702

FRANCE

Yokogawa Contröle Bailey S.A.

5. avenue Newton. 92140 CLAMART

Tel

33 (1) 46 29 15 00. Telex 631251

Tele!ax commercial

33 (1) 46 327072

Tele!ax technrque 33 (1) 46 30 35 81

ZJR5T de Meylan

31, chemin du Vieux Chêne

38240 MEYLAN

Tel

33 76 41 8500. Telex 980374

Teletax 3376418570

~.

SPAIN

Yokogawa España, SA

C/Madre de Dios. 6
28016 MADRID

Tel. [phone]

Teletax (34)-1-345.80.48

(

o

§;

¡§

(iji

,~.,~/

~!

UNITEO KINGOOM

Yokogawa United Kingdom ltd.

Stuart Road

Manor Park, Runcorn

CHESHIRE WA7 HR

Tel. (44 )-0-928-579879

Teletax (44 )-0-928-579899

00HNS~N .

YO KrdGAWA

JOHNSON YOKOGAWA CORPORATION

4 Dart Road, Newnan

GA 30265-1040, USA

Phone [phone]

Telefax 404-254-0928

~!

THE NETHERLANOS

Yokogawa Nederland B.V.

Computerweg 1. 3606 AV MAARSSEN

Tel (31 )-3465-912.1 Telex 40341 YEN NL

Tele!ax (31 )-3465-661.96

(

1M 12J681-E-H

Subject to change without notice

Copyright"' 1991

'(g)

GERMANY

Yokogawa Oeutschland GmbH

8erllner Straße 101-103
40880 RATINGEN

Tel [phone] Telex 8585357

Tele!ax (49)-2102-4983-22

Printed in Holland, 03-404 (A)