YOKOGAWA DO402G User's Manual

User’s Manual

Model DO402G [Style: S3]

Dissolved Oxygen Converter

IM 12J05D02-01E

6th Edition

PREFACE

IM12J05D02-01E065.pdf

TABLE OF CONTENTS

1. Introduction And General Description

............................................................. 1-1

1-1. Instrument Check ............................................................................................ 1-1

1-2. Application ......................................................................................................1-2

1-3. General information ........................................................................................1-3

1-4. Configuration checklist for DO402G ...............................................................1-5

1-5. System Configuration .....................................................................................1-6

1-5-1. Dissolved Oxygen Sensor ...............................................................................................1-6

1-5-2. The holders ......................................................................................................................1-6

2. DO402G SPECIFICATIONS ................................................................................2-1

2-1. General ...........................................................................................................2-1

2-2. Operating specifications .................................................................................2-2

2-3. Model and suffix codes ...................................................................................2-3

3. Installation And Wiring.......................................................................................3-1

3-1. Installation and dimensions

3-1-1. Installation site .................................................................................................................3-1

3-1-2. Mounting methods ...........................................................................................................3-1

............................................................................3-1

3-2. Preparation ..................................................................................................... 3-4

3-3. Wiring the power supply .................................................................................3-5

3-3-1. General precautions ........................................................................................................3-5

3-3-2. Access to terminal and cable entry .................................................................................3-5

3-3-3. AC power .........................................................................................................................3-6

3-3-4. Grounding the housing ....................................................................................................3-6

3-3-5. Switching on the instrument ............................................................................................3-6

3-4. Wiring the contact signals ............................................................................... 3-7

3-4-1. General precautions ........................................................................................................3-7

3-4-2. Contact outputs................................................................................................................3-7

3-4-3. Contact input ..................................................................................................................3-7

3-5. Wiring the analog output signals ..................................................................... 3-8

3-5-1. General precautions ........................................................................................................3-8

3-5-2. Analog output signals ......................................................................................................3-8

3-6. Wiring the standard galvanic sensor .............................................................. 3-8

3-7. Wiring other galvanic sensors ......................................................................... 3-8

3-8. Wiring polarographic sensors ......................................................................... 3-8

3-9. Wiring RS485 signal ....................................................................................... 3-8

4. Operation; Display Functions And Setting

4-1. Operator interface ........................................................................................... 4-1

4-2. Explanation of operating keys ......................................................................... 4-2

4-3. Setting passcodes ..........................................................................................4-3

4-4. Display functions (default) ..............................................................................4-4

5. Parameter setting

5-1. Maintenance mode ......................................................................................... 5-1

5-2. Commissioning mode ..................................................................................... 5-5

...................................................... 4-1

............................................................................................... 5-1

5-1-1. Manual activation of Hold ................................................................................................5-2

5-1-2. Manual Wash start/stop ...................................................................................................5-3

5-1-3. Setpoint adjustment .........................................................................................................5-4

5-2-1. Setpoints ..........................................................................................................................5-6

IM 12J05D02-01E

5-2-2. Range ..............................................................................................................................5-8

5-2-3. Hold ..............................................................................................................................5-10

5-2-4. Wash .............................................................................................................................5-12

5-2-5. Service ...........................................................................................................................5-13

5-3. Notes for guidance in the use of service coded settings ..............................5-14

5-3-1. Parameter specific functions .........................................................................................5-14

5-3-2. Temperature functions ...................................................................................................5-16

5-3-3. Calibration functions ......................................................................................................5-16

5-3-4. mA output settings .........................................................................................................5-18

5-3-5. Contact outputs..............................................................................................................5-20

5-3-6. User interface ................................................................................................................5-24

5-3-7. Communication setup ....................................................................................................5-26

5-3-8. General .........................................................................................................................5-26

5-3-9. Test and setup mode ....................................................................................................5-26

6. CALIBRATION PROCEDURE ............................................................................. 6-1

6-1. General ...........................................................................................................6-1

6-1-1. Calibration methods .........................................................................................................6-1

6-1-2. Diagnostic functions performed during calibration ..........................................................6-2

6-2. Calibration procedure using air calibration method ........................................6-2

6-2-1. Preparation ......................................................................................................................6-2

6-2-2. Procedure for air calibration ............................................................................................6-3

6-3. Calibration procedure using water calibration method .................................... 6-4

6-3-1. Preparation ......................................................................................................................6-4

6-3-2. Calibration operation (water calibration method) .............................................................6-4

6-3-3. Procedure for Water calibration .......................................................................................6-5

6-4. Calibration method using manual calibration method ..................................... 6-6

6-4-1. Preparation ......................................................................................................................6-6

6-4-2. Procedure for manual calibration.....................................................................................6-7

7. Maintenance ........................................................................................................ 7-1

7-1. Overall dissolvedoxygen metering system .....................................................7-1

7-1-1. Inspection and maintenance to be implemented periodically ..........................................7-1

7-1-2. Inspection and maintenance to be implemented on occasion ........................................7-1

7-2. Periodic maintenance for the EXA DO402G converter ................................... 7-2

7-3. Fuse Replacement .......................................................................................... 7-2

8. Troubleshooting

.................................................................................................8-1

8-1. Measures in the case of converter operation failure ....................................... 8-1

8-1-1. No dissolved-oxygen converter operation .......................................................................8-1

8-1-2. Operation key or display failure .......................................................................................8-1

8-2. Measures in the case of failure (Error) detection ............................................ 8-2

9. Spare Parts.......................................................................................................... 9-1

10. Appendix

........................................................................................................ 10-1

10-1. Setpoint ....................................................................................................... 10-1

10-2. Range ......................................................................................................... 10-1

10-3. Hold ............................................................................................................10-1

10-4. Wash ........................................................................................................... 10-1

10-5. User setting table ........................................................................................ 10-2

ERROR CODES .................................................................................................. 10-4

11. Appendix 2 Quality Inspection

.......................................................................11-1

Customer Maintenance Parts List (for Style: S3) Revision Record

IM 12J05D02-01E

..........................................................................................................i

.................. CMPL 12J05D02-03E

PREFACE

CAUTION

WARNINGWARNING

DANGERDANGER

Electric discharge

The EXA analyzer contains devices that can be damaged by electrostatic discharge. When servicing this equipment, please observe proper procedures to prevent such damage. Replacement components should be shipped in conductive packaging. Repair work should be done at grounded workstations using grounded soldering irons and wrist straps to avoid electrostatic discharge.

Installation and wiring

The EXA analyzer should only be used with equipment that meets the relevant IEC, American or Canadian standards. Yokogawa accepts no responsibility for the misuse of this unit.

The Instrument is packed carefully with shock absorbing materials, nevertheless, the instrument may be damaged or broken if subjected to strong shock, such as if the instrument is dropped. Handle with care.

Although the instrument has a weatherproof construction, the transmitter can be harmed if it becomes submerged in water or becomes excessively wet.

Do not use an abrasive or solvent in cleaning the instrument.

Notice

• This manual should be passed on to the end user.

• The contents of this manual are subject to change without prior notice.

• The contents of this manual shall not be reproduced or copied, in part or in whole, without permission.

• This manual explains the functions contained in this product, but does not warrant that they are suitable the particular purpose of the user.

• Every effort has been made to ensure accuracy in the preparation of this manual.

However, when you realize mistaken expressions or omissions, please contact the nearest Yokogawa

Electric representative or sales office.

• This manual does not cover the special specifications. This manual may be left unchanged on any change of specification, construction or parts when the change does not affect the functions or performance of the product.

• If the product is not used in a manner specified in this manual, the safety of this product may be impaired.

Yokogawa is not responsible for damage to the instrument, poor performance of the instrument or losses resulting from such, if the problems are caused by:

• Improper operation by the user.

• Use of the instrument in improper applications

• Use of the instrument in an improper environment or improper utility program

• Repair or modification of the related instrument by an engineer not authorized by Yokogawa.

Safety and Modification Precautions

• Follow the safety precautions in this manual when using the product to ensure protection and safety of the human body, the product and the system containing the product.

The following safety symbols are used on the product as well as in this manual.

This symbol indicates that an operator must follow the instructions laid out in this manual in order to

avoid the risks, for the human body, of injury, electric shock, or fatalities. The manual describes what special care the operator must take to avoid such risks.

DANGER

IM 12J05D02-01E

This symbol indicates that the operator must refer to the instructions in this manual in order to prevent

WARNING

CAUTION

the instrument (hardware) or software from being damaged, or a system failure from occurring.

This symbol gives information essential for understanding the operations and functions.

This symbol indicates Protective Ground Terminal

This symbol indicates Function Ground Terminal (Do not use this terminal as the protective ground

terminal.)

This symbol indicates Alternating current.

This symbol indicates Direct current.

Warranty and service

Yokogawa products and parts are guaranteed free from defects in workmanship and material under normal use and service for a period of (typically) 12 months from the date of shipment from the manufacturer. Individual sales organizations can deviate from the typical warranty period, and the conditions of sale relating to the original purchase order should be consulted. Damage caused by wear and tear, inadequate maintenance, corrosion, or by the effects of chemical processes are excluded from this warranty coverage.

In the event of warranty claim, the defective goods should be sent (freight paid) to the service department of the relevant sales organization for repair or replacement (at Yokogawa discretion). The following information must be included in the letter accompanying the returned goods:

• Part number, model code and serial number

• Original purchase order and date

• Length of time in service and a description of the process

• Description of the fault, and the circumstances of failure

• Process/environmental conditions that may be related to the installation failure of the device

• A statement whether warranty or non-warranty service is requested

• Complete shipping and billing instructions for return of material, plus the name and phone number of a contact person who can be reached for further information.

Returned goods that have been in contact with process fluids must be decontaminated/disinfected before shipment. Goods should carry a certificate to this effect, for the health and safety of our employees. Material safety data sheets should also be included for all components of the processes to which the equipment has been exposed.

IM 12J05D02-01E

Introduction 1-1

WARNINGWARNING

Made in Japan

MODEL SUFFIX

SUPPLY OUTPUT

No.

STYLE

DO402G

115VAC

50/60Hz MAX.10VA

0-20mADC or 4-20mADC

1. INTRODUCTION AND GENERAL DESCRIPTION

The Yokogawa EXA is a 4-wire coverter designed for industrial process monitoring, measurement and control applications. This instruction manual contains the information needed to install, set up, operate and maintain the unit correctly. This manual also includes a basic troubleshooting guide to answer typical user questions.

Yokogawa can not be responsible for the performance of the EXA analyzer if these instructions are not followed.

1-1. Instrument Check

Upon delivery, unpack the instrument carefully and inspect it to ensure that it was not damaged during shipment. If damage is found, retain the original packing materials (including the outer box) and then immediately notify the carrier and the relevant Yokogawa sales office.

Make sure the model number on the textplate affixed to the top of the display board of the instrument agrees with your order.

The textplate will also contain the serial number and power supply selection. Be sure to apply correct power to the unit.

Figure 1-1. Nameplate example

Check that all the parts are present, including mounting hardware, as specified in the option codes at the end of the model number. For a description of the model codes, refer to Chapter 2 of this manual under General Specifications.

Basic Parts List: Converter EXA 402 Instruction Manual (See model code for language) Optional mounting hardware when specified (See model code)

IM 12J05D02-01E

1-2 Introduction

1-2. Application

The EXA converter is intended to be used for continuous on-line measurement in industrial installations. The unit combines simple operation and microprocessor-based performance with advanced self-diagnostics and enhanced communications capability to meet the most advanced requirements. The measurement can be used as part of an automated process control system. It can also be used to indicate dangerous limits of a process, to monitor product quality, or to function as a simple controller for a dosing/neutralization system.

Yokogawa designed the EXA analyzer to withstand harsh environments. The converter may be installed either indoors or outside because the IP65 (NEMA 4X) housing and cabling glands ensure the unit is adequately protected. The flexible polycarbonate window on the front door of the EXA allows pushbutton access to the keypad, thus preserving the water and dust protection of the unit even during routine maintenance operations. A variety of EXA hardware is optionally available to allow wall, pipe, or panel mounting. Selecting a proper installation site will permit ease of operation. Sensors should normally be mounted close to the converter in order to ensure easy calibration and peak performance. If the unit must be mounted remotely from the sensors, WF10 extension cable can be used up to a maximum of 50 metres (150 feet) with a BA10 junction box.

The EXA is delivered with a general purpose default setting for programmable items. (Default settings are listed in Chapter 5 and again in Chapter 10). While this initial configuration allows easy start-up, the configuration should be adjusted to suit each particular application. An example of an adjustable item is the type of temperature sensor used. The EXA can be adjusted for any one of four different types of temperature sensors.

To record such configuration adjustments, write changes in the space provided in Chapter 10 of this manual. Because the EXA is suitable for use as a monitor, a controller or an alarm instrument, program configuration possibilities are numerous.

Details provided in this instruction manual are sufficient to operate the EXA with all Yokogawa sensor systems and a wide range of third-party commercially available probes. For best results, read this manual in conjunction with the corresponding sensor instruction manual.

Introduction 1-3

1-3. General information

Flexibility, reliability and low maintenance are among the benefits provided by the EXA DO402G dissolved oxygen analyzer. Designed to meet the exacting requirements of measuring dissolved oxygen in the modern industrial environment, it contains many features to ensure the best precision whatever the application. This 4-wire converter is housed in a robust IP65 field mountable case. Two mA outputs, four relays, digital communication and a clear LCD make the DO402G a truly comprehensive package. The DO402G features PI control on both the auxiliary mA output and the pulse proportional relay outputs, thus avoiding the need for a separate controller. The famous EXA sensor diagnostics are now expanded with a logbook facility in combination with the RS485 two wire communication software option. This can be used to record events like calibration and diagnostic messages, and to update configuration of the converter remotely. The DO402G accepts inputs from both galvanic and polarographic sensors. Percent saturation, mg oxygen/l water, and ppm DO can be displayed and transmitted. Compensation for atmospheric pressure altitude, salinity and temperature are included for the best accuracy of measurement.

Features

• Simple 3 Ievel operation

• Display mg/l, ppm, % saturation

• Air calibration or saturated water calibration

• Chloride concentration compensation can be programmed

• Automatic temperature compensation

• Built-in barometric air pressure compensation

• “Hold” function enables fixed output signal during maintenance

• Two separate mA output signals

• Wide flexibility incorporating free programmable range settings, selection of output signals and alarm functions

• Analog output with adjustable damping time

• Password protection for each programming level

• Built-in wash timer with remote start possibility

• IP65 weather protection

• Universal mounting possibilities

• Sensor diagnostics

• RS 485 bi-directional communication

• Logbook via RS 485 link

• PI control on mA and pulsed contact controls

Method of operation

The EXA DO30 operates on a galvanic cell principle. The sensor contains a measuring cell consisting of a silver cathode and a lead anode. The voltage generated by this electrode pair is sufficient to generate a spontaneous reduction of oxygen at the cathode, so no external voltage source for this reaction is required. The electrodes are immersed in an electrolyte containing potassium hydroxide. Oxygen molecules can pass through a permeable membrane into the cell. The output current of the cell is directly related to the partial pressure of oxygen at the sample side. In the sensor a thermistor is integrated to be able to correct for temperature changes. Both signals are used in the converter to ensure an automatically compensated value for dissolved oxygen. Calibration is worked out by simple air calibration to make sure that the performance of the instrument will be maintained.

Display functions and ranges

The display continuously gives you all necessary information at a glance. The process values are shown in easily readable programmable units. Either mg/l. % saturation or ppm can be chosen. The user-interface is simplified to a basic set of 6 keys accessible through the flexible window cover. 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 indicating which keys are to be pressed in the display.

IM 12J05D02-01E

1-4 Introduction

Automatic air calibration

Calibration for a dissolved oxygen instrument is performed by simple air calibration. Criteria for automatic calibration (stabilization time, DO values) can be set to suit the sensor. In addition to the air calibration three additional calibration procedures can be used:

1. Span calibration using air saturated water

2. Zero calibration using sulfite saturated water

3. Process calibration using laboratory reference method

Alarm and control functions

The EXA D0402 has four built-in relay contacts. From the factory the first two contacts are pre-defined as a high or low alarm. The third contact its pre-defined as a wash contact. This wash contact is driven by a wash-timer with adjustable wash-time, interval time and relaxation time to control the wash cycle. The fourth contact is fixed to function as an alarm, indicating that the EXA has found a fault in the measuring loop. FAIL safe.

Cleaning

ln combination with the appropriate sensor and immersion type fitting the wash timer with remote start possibility can be used. Interval-time, washing time and relaxation time are free programmable.

Damping time on output signal

Under certain circumstances disturbances can cause high peaks in the output signal. To avoid these disturbances the EXA DO402 has an electronic filtering which averages the output signal during a programmable period. This damping time is programmable between 0 and 120 seconds.

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 D0402 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.

Temperature compensation

The micro-processor makes an accurate temperature compensation possible that performs well over the entire range of the instrument. No further adjustment tables are required.

Barometric air pressure compensation

Air pressure differences, due to weather conditions or altitude, can cause a variation up to 20 % in the dissolved oxygen concentration. A built-in air pressure sensor automatically compensates for barometric influences between 900 to 1100 mbar (90 to 110 kPa).

Sensor diagnostics

The DO sensor is checked for low impedance between the silver electrode and an earth contact in the liquid, to detect membrane integrity. Temperature sensor connections and sensor connections are checked for impedance. These faults are signalled by the FAIL contact and can be signalled to the control room by an output of 0/3.5 mA or 22 mA. The fault is also signalled by a special marker held on the display, a LED on the front and an error code in the message display. During calibration of a DO measuring system the slope deviation from nominal value (%) and sensor output (µA) at 0 mg/l are calculated and checked. If any of these are outside the limits, an error is signalled.

Logbook

Software record of important events and diagnostic data. Available through RS485, for use with the Yokogawa PC402 communication software.

Serial Communication

Bi-directional according to the EIA-485 standard using HART-protocol and PC402 software.

Introduction 1-5

1-4. Configuration checklist for DO402

Standard configuration Options Reference for change Measured variable(s)

Primary inputs D.O. and Temp DO range 0- 20 mg/l any span within 0-50 mg/l “range” DO units mg/l ppm. % saturation code 56 Temperature range 0- 50 °C 25 °C minimum span “range” Temperature unit Celsius Fahrenheit code 11

Outputs

Analog output 4- 20 mA for DO 0-20 mA or 4-20 mA code 30 Second output 4- 20 mA for Temp 0-20 mA or 4-20mA code 30 Output allocation DO and Temp DO, Temp, Table, Pl control code 31 Contact outputs S1= high at 19.5 mg/l (4) freely programmable “setpoint” S2= low at 1.0 mg/l code 40. 41, 42, 43 Contact allocation mg/l and FAIL mg/l, temp, wash, Pl control, HOLD code 40- 43 Contact variables dead time= 0.2 s; hyst= 0.1 mg/l time: 0- 200 s; hyst 0- 20 mg/l code 44 Add. contact functions none time out alarm code 47 Control functions none Pl on contacts or mA2 output code 45, 46, 34 33 Digital outputs none RS485 code 60

Communication

Digital interface disabled RS485 code 60 Communication software disabled PC402 contact factory Variables on display mg/l and temp %sat, °C, mA1, mA2, SL, ZR, REL “display” Burn out disabled burn low (3.5)/ high (22) on mA1/ mA2 code 32 Password protection disabled for mains/ comm./ serv level code 52 Autoreturn return to measure in 10 minutes enable or disable code 50 Add. functions in MAINT disabled wash start/ setpoint adj code 51

Diagnostics

Membrane condition active enable or disable code 02 Check on Slope active enable or disable code 02, 22 Check on zero disabled enable or disable code 02, 21, 22 Check on stability 0.05 mg/l per 60 s 0-50 mg/l in 10-600 s code 20

Compatibility

DO sensor DO30 DOX8, DO410, Ingold code 01, 10 Temperature sensor Pt1000 Pt 100, 22k NTC, PB36 code 10 Membrane thickness 50 µm ( 2 mil) 25 or 50 µm (1 or 2 mil), adj. slope code 01 Sensor principle galvanic galvanic or polarographic code 01, “wiring” Manual temp. comp. disabled disable or enable code 13

Special Features

Salinity compensation disabled comp. for 0- 100 ppt NaCI code 04 Temperature calibration none adjustment +/- 7.5 °C code 12 Zero calibration disabled disable or enable code 21 Sensor washing disabled HOLD during maintenance disabled hold last or hold fix “Hold” Contact during HOLD disabled possible on S1,S2, S3 or S4 code 40-42 Atm. press. compensation active active or manual Soft fail alarm disabled Logbook disabled 2 volumes of 50 events code 61,62

interval < 36 hours, wash time 0.1-10 min.

possible for E1..E4, E7..E9, E12, E16, E22

“Wash”

code 53

IM 12J05D02-01E

1-6 Introduction

1-5. System Configuration

1-5-1. Dissolved Oxygen Sensor

The DO402G can be used with a variety of sensors. Some specific programming may be necessary to match the converter with the sensor.

a. Model DOX8SM sensor

This sensor is a galvanic sensor with a PB36 type temperature compensator and a 25 micron

membrane (1 mil).

This sensor has a nominal output current of 7.5µA in ambient air under reference conditions. In

Service code 01 selection 1 must be programmed when this sensor is used. The membrane check is inactive with this sensor unless external solution ground is used. ( metal holder or sample line )

b. Model DO30G sensor

This sensor is essentially the same as the DOX8SM sensor, but it has a 50 micron membrane,

fixed sensor cable, Pt1000 RTD temperature compensation and integral solution ground that allows membrane checking. The nominal output of this sensor is 3.75 µA in air under reference conditions. In Service item ”*I.CELL” selection 0 must be programmed when this sensor is used.

For details, refer to GS12J05D03-01E.

c. Model DO30 sensor

This sensor is specified in GS12J6K4 and it can be supplied with 50 or with 25 micron membrane.

Normally 50 micron membrane is used and no reprogramming is necessary. Otherwise Service code 01 setting must be changed from 0 to 1.

d. Ingold model 32 sensors with 12, 19 and 25 mm shaft

These sensors are available in many different configurations. The sensor is a polarographic sensor

and therefore settings of service code 01 has to be changed from 0 to 1.

The sensor output is normally between 30 and 100 nA in ambient air under reference conditions,

but the “large cathode” version has a current output between 200 and 700 nA. To utilize Slope diagnostic features, it is best to read current output during first air calibration in “display” mode and

to enter that value in service code 01. The temperature compensator is a NTC resistance and that can be chosen by entry of 3 in code 10. The wiring of the sensor is different as well: The red wire: the anode goes to terminal 18 The white wire: the cathode goes to terminal 17 The green/yellow wire: the shield goes to terminal 14 and the 2 black wires for NTC go to terminal

11 and 12. The membrane checking feature cannot be used for these sensors, due to the construction of the

sensor.

1-5-2. The holders

a. PB30 floating ball holder

All Yokogawa sensors are compatible with the floating ball holder that is specified in GS12J6K4

and GS12J5A1.

b. FD30 immersion fitting

The DO30 sensor is compatible with the FD30 immersion holder as specified in GS12J6K4 and with

all flow fittings and flow fitting subassemblies that are specified in GS12D7K2.

c. DOX8HS submersion type holder

The DOX8SM and the DO30G sensor are compatible with the DOX8HS holder and all PH8 model

holders.

IM 12J05D02-01E

2. DO402G SPECIFICATIONS

2-1. General A. Input specifications

: The DO402G Dissolved Oxygen

converter measures the current, that is generated by the Dissolved Oxygen sensor. The flexibility of the input circuit allows the use of many commercially available sensors, whether they are of the Galvanic type (driving voltage generated internally) or Polarographic type (driving voltage supplied by converter) The input range varies from

0.0 nA up to 500 nA for polarographic sensors and 0.0 to 50 µA for galvanic sensors. Temperature measurement for automatic temperature compensation utilizes Pt100, PT1000 RTD elements or PB36 as used in DOX8 and DO30 sensors, as well as the 22 k NTC as used by the Hamilton Oxyferm.

B. Input ranges

- DO : 0- 50 mg/l (ppm)

- Temperature

C. Span

- DO concentration : minimum: 1 mg/l (ppm) maximum: 50 mg/l (ppm)

- % saturation

- Temperature

D. Transmission Signals

: Two isolated outputs of 0/4- 20

: 0- 50 ºC (32- 122 ºF)

: minimum: 10 %

maximum

: minimum: 25 ºC (77 ºF) minimum: 25 ºC (77 ºF)minimum: 25 ºC (77 ºF)

maximum

mA DC with common negative. Maximum load 600 Ohm. Auxiliary output can be chosen from Temperature, DO, PI control, table, burn up (22 mA) or burn down (0 or 3.5 mA) to signal failure

: 300 % : 50 ºC (122 ºF)

Specification 2-1

E. Temperature compensation

: 0- 50 ºC

Sensor types: Pt100 or Pt1000 RTD; PB36 (Yokogawa compatible); 22 k NTC (Ingold compatible) Automatic or Manual temperature compensation

F. Calibration

: Semi-automatic calibration with

automatic compensation for influence of barometric pressure and altitude on partial pressure of oxygen in air (or solubility of oxygen in water). Automatic compensation for influence of salinity of water on solubility of oxygen in water is programmable. The correction for pressure, salinity and temperature meets ISO 5814

Possible calibration routines are:

- Slope (span) calibration in ambient air. The calibration table is based on 70 % RH and is determined empirically.

- Slope (span) calibration in- Slope (span) calibration in water, saturated with air: according ISO 5814

- Zero calibration (normally inactive)

G. Serial Communication

: Bi-directional according to the

EIA-485 standard using HART protocol and PC402 software.

H. Logbook

: Software record of important

events and diagnostic data. Available through RS485, with key diagnostic information available in the display.

I. Display

: Custom liquid crystal display,

with a main display of 31/2 digits

12.5 mm high. Message display of 6 alphanumeric characters, 7 mm high.

IM 12J05D02-01E

2-2 Specification

J. Contact outputs

- General : Four (4) SPDT relay contacts with LED indicators. For S1, S2, and S3, the LED is on when relay is powered. NOTE: For S4 (FAIL) LED lights when power is removed (Fail safe).

Contact outputs configurable

for hysteresis and delay time.

- Switch capacity

: Maximum values 100 VA,

250 V AC, 5 Amps. Maximum values 50 Watts, 250 V DC, 5 Amps.

- Status : High/Low process alarms, selected from process parameters and temperature. Contact output is also available to signal “Hold Active”

- Control function

: On/Off PI pulsed Proportional duty cycle control

with integral term.

PI frequency Proportional frequency control

with integral term. In addition wash cleaning control signal on S3, and FAIL alarm for system and diagnostic errors on S4

K. Contact input : Remote wash cycle start.

L. Power supply

Supply voltage rating

: 100, 115, 230 VAC

Applicable range

: �5 to 115, ��.� to 132.2, �5 to 115, ��.� to 132.2,�5 to 115, ��.� to 132.2,

1�5.5 to 264.5 VAC

Supply frequency rating

: 50 / 60 Hz

Applicable range

: 50 Hz ± 5% / 60 Hz ± 5%

Power consumption

: Maximum 10 VA for steady

operation

M. Safety and EMC conforming standards

Safety : conforms to EN 61010-1,

CSA C22.2 No.1010.1 certified

EMC : conforms to EN61326 Class A

(Note 1), EN61000-3-3 , AS/NZS CISPR 11

Category based on IEC 61010: II (Note 2) Pollution degree based on IEC 61010:2 (Note

Installation altitude: 2000 m or less

Note 1:

Note 2:

N. Shipping details

: Package size w x h x d

2-2. Operating specifications

A. Performance : DO (at t process = 25 °C)

- Linearity : ± 0.03 mg/l or ± 0.5%FS,

- Repeatability: ± 0.03 mg/l or ± 0.5%FS,

- Accuracy : ± 0.05 mg/l or ± 0.5%FS,

B. Performance : Temperature (Pt1000, PB36,

22kNTC)

- Linearity : ± 0.3 ºC

- Repeatability : ± 0.1 ºC

- Accuracy : ± 0.3 ºC

Performance : Temperature (Pt100)

- Linearity : ± 0.4 ºC

- Repeatability : ± 0.1 ºC

- Accuracy : ± 0.4 ºC

Note on performance specifications:

The specifications are expressed with sim-

ulated inputs, because the DO402G can be used with many different sensors with their unique characteristics. The following tolerance is added to above performance. mA output tolerance : ± 0.02 mA of "0/4 - 20 mA" Digital display tolerance : +1 digit

C. Response time

0- �0% : 10 s

D. Ambient operating temperature

: -10 to +55 �C (14 to 131 ºF)�C (14 to 131 ºF)C (14 to 131 ºF)

This instrument is a Class A product, and it is designed for use in the industrial environment. Please use this instrument in the industrial environment only. Installation category, called overvoltage category, specifies impulse withstand voltage. Category II is for electrical equipment. Pollution degree indicates the degree of existence of solid, liquid, gas or other inclusions which may reduce dielectric strength. Degree 2 is the normal indoor environment.

2�0 x 300 x 2�0 mm.

11.5 x 11.� x 11.5 in. Packed weight approx.

2.5 kg (5lb).

whichever is greater whichever is greater whichever is greater

Specification 2-3

E. Storage temperature

: -30 to +�0 �C (-22 to 15� ºF)�C (-22 to 15� ºF)C (-22 to 15� ºF)

F. Humidity : 10 to �0% RH non-condensing G. Housing

Case : Cast aluminium with chemically

resistant coating Cover : flexible polycarbonate window. Case color : off-white Cover color : moss green. Cable entry : Cable terminals:

via six Pg13.5 nylon glands.

for up to 2.5 mm2 finished wires.

Protection : weather resistant to IP65 /

NEMA 4X / CSA Type 3S standards.

Mounting : Pipe, wall or panel, using

optional hardware.

H. Data protection

Non volatile memory for configuration and logbook, and lithium battery for clock support.

I. Watchdog timer

: Checks microprocessor

2-3. Model and suffix codes

[Style: S3]

Model

DO402G ----------------- --------- Dissolved Oxygen

Type -1 --------- General Power Supply

Voltage

Language -J-E---------

Options

Suffix code

-1

-2

-5

Mounting Hardware

Tag Plate

Conduit Adapter

Hood

Option code

---------

/PM

/H3

/H4

/SCT /AFTG /ANSI /X1

Description

Converter

115V +/-15% AC, 50/60 Hz 230V +/-15% AC, 50/60 Hz 100V +/-15% AC, 50/60 Hz

Japanese English

Pipe, wall mounting bracket (Stainless steel) Panel mounting bracket (Stainless steel) Hood for sun protection (Carbon steel) Hood for sun protection (Stainless steel) Stainless steel tag plate G 1/2 1/2 NPT Epoxy baked finish (*1)

*1 The housing is coated with epoxy resin.

J. Automatic safeguard

: Return to measuring mode

when no keystroke is made for 10 min.

K. Power interruption

Less than 50 milliseconds no

effect.

L. Operation protection

3-digit programmable password.

IM 12J05D02-01E

Installation and wiring 3-1

184

144

220

112

Four M6 screws, 8 (0.31) deep

36 36

A B C

E F

□ Hood (optional)

Option code : /H

□

Cable inlet port (21 (0.83) dia. holes) DIN PG13.5 cable gland

Ground terminal

(M4 screw)

Weight: Approx. 2 kg

A : Spare (can be used for contact input separately) B : For sensor cable C : For output signal D : For contact output (S3 and S4) E : For contact output (S1 and S2) F : For power supply

Adaptor for conduit work (option code : /AFTG, /ANSI)

Unit: mm (inch)

Approx. 55

Adaptor

G 1/2 female ( / AFTG)

1/2 NPT female ( / ANSI)

(7.24)

(8.66)

(3.15)

(1.93)

(2.17)

(5.67)

(2.83)

(0.79)

(0.91)

(4.41)

(1.42)

(1.50)

WARNINGWARNING

3. InstallatIon and WIrIng

3-1. Installation and dimensions 3-1-1. Installation site

This instrument is a Class A product, and it is designed for use in the industrial environment. Please use this instrument in the industrial environment only.

The EXA converter is weatherproof and can be installed inside or outside. It should, however, be installed as close as possible to the sensor to avoid long cable runs between sensor and converter. In any case, the cable length should not exceed 50 meters (162 feet). Select an installation site where:

• Mechanical vibrations and shocks are negligible

• No relay/power switches are in the direct environment

• Access is possible to the cable glands (see figure 3-1)

• The converter is not mounted in direct sunlight or severe weather conditions

• Maintenance procedures are possible (avoiding corrosive environments) The ambient temperature and humidity of the installation environment must be within the limits of the

instrument specifications. (See chapter 2).

3-1-2. Mounting methods

Refer to figures 3-2 and 3-3. Note that the EXA converter has universal mounting capabilities:

• Panel mounting using optional brackets

• Surface mounting on a plate (using bolts from the back)

• Wall mounting on a bracket (for example, on a solid wall)

• Pipe mounting using a bracket on a horizontal or vertical pipe (maximum pipe diameter 50 A)

Figure 3-1. Housing dimensions and layout of glands

IM 12J05D02-01E

3-2 Installation and wiring

M6, 4 screws

100

178

137

+2 0

137

+2 0

12 max.(panel thickness)

Panel cutout dimensions

(7.01)

(0.91)

(0.47)

(5.43)

(5.43)(3.94)

M5, 2 screws

188

174

200

100

M6, 4 screws

135 13

224

M6, 4 screws

200

35 15

70 100

10mm dia., 3 holes

Nominal 50A (O.D 60.5mm) mounting pipe

Example of bracket used for pipe mounting

Example of bracket used for wall mounting

(7.40)

(6.85)

(1.97)

(5.31) (0.51)

(8.82)

(7.87)

(1.38)

(0.59)

(2.76)

(3.94)

(0.39)

(7.87)

(3.94)

(2 inch)

Figure 3-2 . Panel mounting diagram (Option Code: /PM)

Unit: mm (inch)

Figure 3-3. Wall and pipe mounting diagram (Option Code: /U) (Option Code: /U)

IM 12J05D02-01E

Installation and wiring 3-3

DANGERDANGER

WARNINGWARNING

Figure 3-4. Internal view of EXA wiring compartment

• Never apply power to the DO402G converter and other instruments connected to the DO402G converter until all wiring is completed.

• This product complies with the CE marking and CSA certified.

Where compliance with the CE marking and relevant standard is necessary, the following wiring is

required.

1. Install an external switch or circuit breaker to the power supply of the DO402G converter.

2. Use an external switch or circuit breaker rated 5A and conforming to IEC 60947-1 or IEC 60947-3.

3. It is recommended that the external switch or circuit breaker be installed in the same room as the DO402G converter.

4. The external switch or circuit breaker should be installed within reach of the operator and identified with marking as a power supply switch to the DO402G converter.

5. Power lines such as power cables and contact outputs should be fixed securely onto a wall or construction using cable racks, conduit tubing, nylon bands or other appropriate ways. Accidental removal from terminals by pulling may result in electric shock.

IM 12J05D02-01E

3-4 Installation and wiring

WARNING

12D7C3-04

GLANDS TO BE

USED FOR CABLING

3-2. Preparation

Refer to figure 3-4. The relay contact terminals and power supply connections are under the screening (shielding) plate. These should be connected first. Connect the sensor, outputs and data communication connections last.

To open the EXA 402 for wiring:

1. Loosen the four frontplate screws and remove the cover.

2. Use the rubber knob in the lower right hand corner and swing open the display board to the left.

3. The upper terminal strip is now visible.

4. Remove the screen (shield) plate covering the lower terminal strip.

5. Connect the power supply and contact outputs. Use the three glands at the back for these cables.

6. Replace the screen (shield) plate over the lower terminals.

Always replace the screen plate over the power and contact outputs for safety and to avoid interference.

7. Connect the analog output(s), the sensor input, and, if necessary, the RS485 serial bus.

8. Use the front three glands for analog output, sensor input, contact input and communication cabling (see figure 3-5).

9. Close the display board and switch on the power. Commission the instrument as required or use the default settings.

10. Replace the cover and secure frontplate with the four screws.

Tighten four frontplate screws to 1.5 N·m torque.

Contact

(S3,S4,FAIL)

output cables

Suitable for cables with an outside diameter between 6 - 12 mm (0.24 - 0.47 in.)

Figure 3-5. Glands to be used for cabling

Communi-

cation,

contact

input

Contact (S1,S2)

output cables

High voltage section

Sensor

cables

Power

cable

Analog

output cables

IM 12J05D02-01E

Installation and wiring 3-5

DANGER

FRONT GLANDS

Figure 3-6. System configuration

3-3. Wiring the power supply

Sensor

Output signals

RS485

Contact intput

Power

Contact output

REAR GLANDS

S4/FAIL

3-3-1. General precautions

Make sure the power supply is switched off. Also, make sure that the power supply is correct for the specifications of the EXA and that the supply agrees with the voltage specified on the textplate. Remove the front cover by unscrewing the four screws to check this textplate on the top of the display board.

Local health and safety regulations may require an external circuit breaker to be installed. The instrument is protected internally by a fuse. The fuse rating is dependent on the supply to the instrument. The 250 VAC fuses should be of the “time-lag” type, conforming to IEC60127. The internal fuse is located next to the power terminals (in the lower right hand corner).

Use only a fuse of the specified current, voltage and type ratings to prevent fire. For fuse replacement, refer to Section 7-3, “Fuse Replacement.”

3-3-2. Access to terminal and cable entry

Terminals 1 and 2 on the bottom terminal strip are used for the power supply. Guide the power cables through the gland closest to the power supply terminals. The terminals will accept wires of 2.5 mm2 (14 AWG). Use cable finishings if possible.

Connect the wires as indicated in the wiring diagram (refer to figure 3-6).

IM 12J05D02-01E

3-6 Installation and wiring

DANGER

CAUTION

C NC NO

72 73 51 52 53 41 43 31 3342 32

FUSE

100 115 230

250VAC; T

3 12

C NC NO C NC NO C NC NO

VAC VAC VAC

200 mA 200 mA 100 mA

Relay Contacts

Power Supply

1213

1516

63 66 65 62 61 95 94 93 92 91

SCREEN

mA2

mA1

SCREEN

TL TL

17 11

Sensor Inputs mA Outputs

Digital Communications

Contact Input

CONT SENSOR mA OUTPUT RS485

- - - polarographic sensor galvanic sensor

High voltage compartment

G N L

Liquid

earth

Shield

Temp

SCREEN

SCREEN 2

250VAC

100VA

250VDC

50W

(M4 screw)

Figure 3-7. Input and output connections

3-3-3. AC power

Connect terminal 1 to the phase line of the AC power and terminal 2 to the zero line. The size of conductors should be at least 1.25 mm2. The overall cable diameter should be between 6 & 12 mm (0.24 & 0.47 in).

3-3-4. Grounding the housing

Protective grounding must be made to prevent electric shock. To protect the instrument against interference, the housing should be connected to ground by a large

area conductor. This cable can be fixed to the rear of the housing using a braided wire cable. See figure 3-8. This is separated from input ground by a galvanic isolation.

Please be sure to connect protective grounding of DO402G with cable of 1.25 mm2 or larger cross section in order to avoid the electrical shock to the operators and maintenance engineers and prevent the influence of external noise. And further connect the grounding wire to the

3-3-5. Switching on the instrument

After all connections are made and checked, the power can be switched on from the power supply. Make sure the LCD display comes on. All segments will illuminate, then the instrument will momentarily display its unique serial number. After a brief interval, the display will change to the meas-

mark (100Ω or less).

ured value. If errors are displayed or a valid measured value is not shown, consult the troubleshooting section (Chapter 8) before calling Yokogawa.

Figure 3-8. Grounding the housing

IM 12J05D02-01E

Installation and wiring 3-7

WARNING

3-4. Wiring the contact signals

3-4-1. General precautions

The contact output signals consist of voltage-free relay contacts for switching electrical appliances (SPDT). They can also be used as digital outputs to signal processing equipment (such as a controller or PLC). It is possible to use multi-core cables for the contact in and output signals and shielded multi-core cable for the analog signals.

3-4-2. Contact outputs

The EXA unit’s four contact outputs can be wired to suit your own custom requirements (Figure 3-6). In the Non-Alarm or Power Off states, contacts S1, S2 and S3 are OFF, Common (C) and Normally

Closed (NC) are in contact. In the “Fail” or Power Off states, contact S4 is ON, Common (C) and Normally Closed (NC) are in con-

tact. You can either use them to switch AC power, or switch a DC Voltage for digital interfacing.

Default settings

• The contact S1 is pre-programmed for high alarm function.

• The contact S2 is pre-programmed for a low alarm function.

• The contact S3 is pre-programmed for wash function.

• The contact S4 is pre-programmed for FAIL.

The three control contacts (S1 to S3) can be used for simple process control by programming their function (Chapter 5). The FAIL contact is programmed to signal a fault in the measuring loop. Always connect the FAIL contact to an alarm device such as a warning light, sound annunciator, or alarm panel to make full use of the fault detection possibilities (self diagnostics) of the EXA converter.

3-4-3. Contact input

It is necessary to use screening/shielding on the output signal cables. Screw (M3) 23 is used to connect the shielding.

On resistance: 10Ω or less Off resistance: 100kΩ or more

IM 12J05D02-01E

3-8 Installation and wiring

3-5. Wiring the analog output signals 3-5-1. General precautions

The analog output signals of the EXA transmit low power standard industry signals to peripherals like control systems or strip-chart recorders (Figure 3-6).

3-5-2. Analog output signals

The output signals consist of active current signals of either 0-20 mA or 4-20 mA. The maximum load can be 600 ohms on each.

It should be necessary to use screening/shielding on the output signal cables. Terminal 63 is used to connect the shielding.

3-6. Wiring the standard galvanic sensor

The sensor cable has markers on the individual wires. These markings refer to the markers on the terminals.

The temperature compensator has two wires with the markings T1, T2 and/or 11, 12 and must be connected to terminal 11 and 12.

The measuring electrode: the cathode is marked with IE and/or 13 and must be connected to terminal 13. The reference electrode: the anode is marked with RE and/or 15 and must be connected to terminal 15. The liquid earth ( solution ground) is marked with 16 and must be connected to terminal 16. Note: The liquid earth (solution ground) connection is valid

only when the floating ball holder, Model PB350G or PB360G, is used. Otherwise, do not make a connection to terminal 16. The connection, if made, may result in abnormal readings. Even if the floating ball holder is

Figure 3-9. Cable gland assembly

used, when the liquid earth (solution ground) connection is not used, then disconnect the wiring to terminal 16. (The disconnected wire should be covered with an insulating tube to avoid contact

with other terminals.) The overall shield of the cable is marked with 14 and must be connected to terminal 14. Note: Always interconnect terminal 13 and 17 to reduce noise voltage onto measurement.

3-7. Wiring other galvanic sensors

Consult the users manual for the color identification of the sensor cable and connect temperature compensator, cathode and anode to the terminals: 11, 12, 13 and 15 as described above. Connect the cable shield to 14 if there is one available. Sensor diagnostics is normally not possible. Note: Always interconnect terminal 13 and 17 to reduce noise voltage onto measurement.

3-8. Wiring polarographic sensors

Consult the owners manual for the color identification of the sensor cable and connect temperature compensator, cathode and anode to terminals 11, 12, 17 and 18 in this sequence. Connect the cable shield (when provided) to terminal 14.

Note: A shorting cable is connected between converter terminals 13 and 17. When a polarographic sensor is to be connected, the cable is not used, so disconnect it.

It is recommended to save the shorting cable for future use—if may be needed when a galvanic sen-

sor is used.

3-9. Wiring RS485 signal

It is necessary to use screening/shielding on the output signal cables. Screw (M3) 99 is used to connect the shielding.

IM 12J05D02-01E

Operation 4-1

4. OPERATION; DISPLAy FUNCTIONS AND SETTING

4-1. Operator interface

This section provides an overview of the operation of the EXA operator interface. The basic procedures for obtaining access to the three levels of operation are described briefly. For a step-by-step guide to data entry, refer to the relevant section of this instruction manual. Figure 4-1 shows the EXA operator interface.

LEVEL 1: Maintenance

These functions are accessible by pushbutton through a flexible front cover window. The functions make up the normal day-to-day operations that an operator may be required to complete. Adjustment of the display and routine calibration are among the features accessible in this way. (See table 4-1).

LEVEL 2: Commissioning

A second menu is exposed when the EXA front cover is removed and the display board is revealed. Users gain access to this menu by pressing the button marked * in the lower right of the display board. This menu is used to set such values as the output ranges and hold and wash features. It also gives access to the service menu. (See table 4-1).

LEVEL 3: Service

For more advanced configuration selections, press the button marked * , then press “NO” repeatedly until you reach *SERV. Now push the “YES” button. Selecting and entering “Service Code” numbers in the commissioning menu provide access to the more advanced functions. An explanation of the Service Codes is listed in chapter 5 and an overview table is shown in chapter 10.

Table 4-1. Operations overview Routine Function Chapter

Maintenance AIR. CAL Calibration in air ( preferred method) 6 (level 1) H2O. CAL Calibration in aerated water 6 MAN. CAL Process calibration based on grab sample 6 DISP Read auxiliary data and set message display 4 HOLD Switch HOLD on/off *) 5 SETP Adjust alarm setpoints *) 5 WASH Start wash cycle manually *) 5 M.TEMP Adjust manual temp*) 5 M.PRESS Adjust manual press 5 Commissioning *SETP Adjust alarm setpoints 5 (level 2) *RANGE Adjust output range(s) 5 *HOLD Activate HOLD function 5 *WASH Activate and configure the wash timer 5 Service *SERV Configure the specialized functions of the converter 5 (level 3)

)

Only possible if activated

* NOTE:

All three levels may be separately protected by a password. See Service Code 52 in chapter 5

Service Code table for details on setting passwords.

IM 12J05D02-01E

4-2 Operation

HOLD FAIL

YES NO

ENT

SETPOINTS RANGE SET HOLD

SERVICE

MEASURE

H2O.CAL DISPLAY

HOLD

NO MODEYES

ENT

WASH/S3

FAIL/S4

YOKOGAWA

MODE

AIR.CAL

WASH

TEMP.MAN.

CONTACTS

MARKINGS

WITHIN

ENCLOSURE

MAN.CAL

12J6B2-04

FRONT EXA DO402

Output hold flag

Main display

Message display

Key prompt flags

Selection keys YES : Accept setting NO : Change setting

Adjustment keys > : Choose digit to

adjust

^ : Adjust digit ENT : Confirm change

Figure 4-1. DO402 operator interface

Manual temperature compensation flag

Fail flag

Broken line indicates area that can be seen through front cover

Menu pointer flags

Commissioning function menu

Commissioning mode access key

Relay contact status indicators

Measure/Maintenance mode key

4-2. Explanation of operating keys MODE key This key toggles between the Measuring and Maintenance modes. Press once to obtain

access to the maintenance function menu. (Level 1 see table 4-1) Press again to return to the Measuring mode (press twice when hold is activated).

yES/NO keys These are used to select choices from the menu.

YES is used to accept a menu selection. NO is used to reject a selection, or to move ahead to the next option.

DATA ENTRy keys ( ENT)

is used as a “cursor” key. Each press on this key moves the cursor or flashing digit one place to the right. This is used to select the digit to be changed when entering numerical data.

is used to change the value of a selected digit. Each press on this key increases

the value by one unit. The value can not be decreased, so in order to obtain a lower value, increase past nine to zero, then increase to the required number.

ENT

When the required value has been set using the > and ^ keys, press ENT to confirm the data entry. Please note that the EXA 402 does not register any change of data until the ENT key is pressed.

* key This is the Commissioning mode key. It is used to obtain access to the Commissioning

menu. This can only be done with the cover removed or opened. Once this button has been used to initiate the Commissioning menu, follow the prompts and use the other keys as described above.

Operation 4-3

4-3. Setting passcodes

In Service Code 52, EXA users can set passcode protection for each one of the three operating levels, or for any one or two of the three levels. This procedure should be completed after the initial commissioning (setup) of the instrument. The passcodes should then be recorded safely for future reference.

When passcodes have been set, the following additional steps are introduced to the configuration and programming operations:

Maintenance

Press MODE key. The display shows 000 and *PASS* Enter a 3-digit passcode as set in Service Code 52 to obtain access to the Maintenance Mode

Commissioning

Press * key. The display shows 000 and *PASS* Enter a 3-digit passcode as set in Service Code 52 to obtain access to the Commissioning Mode.

Service

From the commissioning menu, select *SERV by pressing YES key. The display shows 000 and *PASS* Enter a 3-digit passcode as set in Service Code 52 to obtain access to the Service Mode.

NOTE: See Service Code 52 for the setting of passcodes.

IM 12J05D02-01E

4-4 Operation

YES

MODE

YES

YES NO

DISPLAY

HOLD

AIR.CAL

H2O.CAL

YES

DISPLAY

MAN.CAL

YES

(See H2O calibration Chapter 6)

MEASURE H2O.CAL DISPLAY

HOLD

AIR.CAL

When enabled in Hold (SET HOLD) mode.

Manual press. when enabled in service code 51

(See Manual calibration Chapter 6)

Process

temperature

Barometric

pressure

Software release

number

Slope

Cell current

Manual press. when enabled in service code 51

Display Access

% Saturation

Current

output 1

Manual temp. when enabled in service code 13

Manual press. when enabled in service code 51

(Note 1)

(Note 2)

MAN.CAL

(See Air calibration Chapter 6)

Note 1: Manual temperature compensation menu

The menu can be displayed in maintenance mode. This can be done by enabling the function in Service Code 13. Manual temperature compensation menu is displayed and temperature can be entered manually.

Note 2: Pressure is in bars.

Default: 1.013 bar

Setting range: 0.500 to 5.000 bar

Current output 2

Press YES to fix

the selected second

line of display

4-4. Display functions (default)

IM 12J05D02-01E

Parameter setting 5-1

5. PARAMETER SETTING

5-1. Maintenance mode

Standard operation of the EXA instrument involves use of the maintenance (or operating) mode to set up some of the parameters.

Access to the Maintenance mode is available via the six keys that can be pressed through the flexible window in the instrument cover. Press the MODEkey once to enter this dialog mode.

NOTE: At this stage the user will be prompted for pass code where this has been previously set up in

service code 52 in chapter 5.

Air calibration See “calibration” section 6. AIR.CAL

H20 calibration See “calibration” section 6. H2O.CAL

Display See “operation” section 4. DISP

Setpoint Select and adjust setpoint (when enabled in service menu section 5, service SETP

Wash Manually start/stop wash cleaning (when enabled in service menu section 5, WASH

Hold Manually switch on/off HOLD (when enabled in commissioning menu section). HOLD

code 51). See adjustment procedure 5-4.

service code 51). See adjustment procedure 5-3.

See adjustment procedure 5-2.

IM 12J05D02-01E

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