Zirconia O2 Converter C-28C Control Unit INSTRUCTION MANUAL

Zirconia O2 Converter C-28C Control Unit INSTRUCTION MANUAL

IM1006221DE C-28C INSTRUCTION MANUAL Ver.2.0 PAGE:1/21

Zirconia O

2

Converter

C-28C

Control Unit

INSTRUCTION MANUAL

CONTENTS

Ⅰ.

Specifications

Ⅰ-1

General

----------------------- 2

Ⅰ-2

Alarm

Ⅰ-3

Analog

-------------------------- 4

Ⅰ-4

Output

--------------------------- 4

Ⅰ-5

Communication

--------------------- 4

Ⅱ.

Installation

Ⅱ-1 Installation

Ⅱ-2 Wiring

Ⅲ.

Operation

Descriptions

Operation

Mode

Ⅳ.

Communication Specifications

----------------------17

Ⅴ.

Parameter List

------------------------------18

Ⅵ.

Troubleshooting Chart -

-------------------------20

C -28C Control unit is the converter for EMF of the O

2

sensors with Zirconia electro -chemical cell which can measure Cell EMF by controlling the sensor to have fixed temperature and can display temperature and O

2

concentration. Users can set outputs at each measurement range, and it has the selectable 2 points High

-Low Alarms.

IM1006221DE C-28C INSTRUCTION MANUAL Ver.2.0 PAGE:2/21

Ⅰ.

Specifications

Ⅰ-1

General Specifications

Input Signals

Output Signals

Cell EMF : -40~1500mV(Accuracy:±0.2% ±1 digit)

RTD Resistance :According to our specification

Output Hold :non -voltage contact

(Contact Rating 1mA, 5VDC or more)

Remote Calibration :non -voltage contact

(Contact Rating 1mA, 5VDC or more)

Remote Range Switching:non

-voltage contact - 2 points

(Contact Rating 1mA, 5VDC or more), (BCD Input)

Heater Voltage:SSR Output

Output voltage depends on the power. (full wave)

Zero Cross ON/OFF Control

Analog Output:4 -20mADC , 0-1VDC (or 0-5VDC or 0-10VDC)

Serial Communication:RS -232C

Alarm Output:2 points

Failure Alarm Output:1 point Please refer to

Range Answer Back:1 point P3 and P4.

Sampling Cycle

Display and

Measurement

Approx. 0.2 seconds(Cell EMF)

1) Display

Upper LED:Color---Green

Operation Mode : Oxygen Concentration

Setting Mode : Set-up Parameter

Lower LED:Color---Red

Operation Mode : Select to display either Cell

Temperature and Cell EMF,

Range Number, and Scale L&H.

Setting Mode : Set-up value

Display Parameter Lamp:Color---Green

Indicates the lower display is showing

TEMP : Cell Temperature

EMF : Cell EMF

Status Lamp:

Color --- Green 5 points, Red 3 points

CAL --- lighted in Calibration Mode (Green)

--- lighted when using % (Green) ppm --- lighted when using ppm (Green) mV --- lighted when using mV (Green)

AUTO --- lighted when using AUTO RANGE (Red)

AL1 --- lighted at AL1 output (Red)

AL2 --- lighted at AL2 output (Red)

2) Display Range

The maximum value on the selected unit is displayed.

Displayed digit number:4 digits(Zero Suppression Method)

O

2

:0.00 ~ 99.99 or 0.0 ~ 100.0

ppmO

2

:0 ~ 9999 or 0.0 ~ 999.9

-%O

2

: -19.99 ~ 99.99 mV :

-525 ~ 1575

Cell Temperature Display: -180 ~ 1400(approx.)

Over Range: [ ]

Under Range: [ ]

IM1006221DE C-28C INSTRUCTION MANUAL Ver.2.0 PAGE:3/21

3) Measurement Range

Output Range is to be set by user’s option within the

Measurement Range (Shifting and Rotating are available).

①%

--- 0.00 ~ 99.99 or 0.0 ~ 100.0

(The decimal point position depends on the setting at use by +O

2 version.)

② ppm --- 0 ~ 9999 or 0.0 ~ 999.9

(There is no setting in the -O

2

version.)

(The decimal point position depends on the setting.)

③ -O

2

--- -19.99 ~ 99.99

(At use by

-O

2 version.)

④ mV --- 0 ~ 1500

Power Supply

Power Consumption

Ambient

Temperature/

Ambient Humidity

4) Operational Expression

O

2

Concentration(%)=20.6/10

(E/A)

O

2

Concentration(ppm)=O

2

Concentration(%)×10000

E: Cell EMF 50 when A=735℃ (ex,A=735℃ E=50)

5) Range Number:1range

6) Range Switching:

Manual---Select on the front panel.

AUTO ---Change automatically of two ranges.

(At use by

+O

2 version.)

7) Answer Back:

Outputs the Range Number currently in use.

90 to 130VAC, 50/60Hz

Approx. 12VA(max.)

NOTE:Except for the heater when the sensor is connected.

-10 to 50℃ / 90%RH or less, no condensation

Insulating

Resistance

Primary Side Terminals---Secondary Side Terminals:

20MΩ or more at 500VDC

NOTE:Primary Side Terminals = Power & Output Terminals

Secondary Side Terminals = Input & Communication Terminals

Withstand Voltage

Front and Case

Body Color

Size/Weight

Accessories

Primary Side Terminals---Secondary Side Terminals:

1minute at 1500VAC(below 10mA)

NOTE:Primary Side Terminals = Power & Output Terminals

Secondary Side Terminals = Input & Communication Terminals

Front:Non

-flammable ABS

Case :Non -flammable polycarbonate resin

Gray

96W×96H×107D(132D when the terminal cover is attached)

Weight approx. 500g

Panel Mounting Pieces, 2 pieces in 1 set

IM1006221DE C-28C INSTRUCTION MANUAL Ver.2.0 PAGE:4/21

Ⅰ-2

Alarm Output・Range Answer Back

Alarm Point Number 3 points (a relay contact output)

Alarm System

FAIL AL (Heater broken and/or RTD broken or short)

Heater Break :Output is ON at Target Temperature -50℃ or less and which makes TEMP Display blink.

Resistance Temperature Detector Break:Output is ON at Display

Temperature 735℃ or more and which makes TEMP Display blink.

Resistive Load: 100VAC 2A, 240VAC 2A, 30VDC 2A

Inductive Load: 100VAC 1A, 240VAC 1A, 30VDC 1A

Oxygen Concentration Alarm

AL1: for setting Lower Limit and Upper Limit

AL2: for setting Lower Limit and Upper Limit

In Standby Mode, Alarm System does not activate until the sensor warm

-up is completed.

Hysteresis:Can be set for both AL1 and AL2 Alarm Points.

Resistive Load: 100VAC 2A, 240VAC 2A, 30VDC 2A

Inductive Load: 100VAC 1A, 240VAC 1A, 30VDC 1A

1 point

Range Answer Back

Transistor Open Collector Output

Load Capacity--- 24VDC 50mA(max.)

Function

Ⅰ-3

Analog Output

Output Point Number 2 points

Output Type

4

-20mADC(Load Resistance:below 600Ω, Isolated)

0 -1VDC/0-5VDC/0-10VDC

(Current Capacity:below 1mA, Isolated)

It is possible to switch from 0 -1V to 0-5V, 0-10V by wiring and changing the setting.

Ⅰ-4

Output Hold

Function

When Contact Signal is ON, it holds the output values (Voltage and

Current). The display follows the input.

External Contact Type Non -voltage contact

Ⅰ-5

Communication Interface

Communication

Baud Rate

RS -232C

9600bps

A,B,and C Types are available.

IM1006221DE C-28C INSTRUCTION MANUAL Ver.2.0 PAGE:5/21

Ⅱ.

Installation

Ⅱ-1

Installation

This unit is for indoor use and to be installed by paneling.

Please see the outline drawing for the panel cutting size.

Please do not install in the following places:

Where corrosive gas or combustible gas exists

Where water, oil, or chemicals might be splashed

Where rather much dust, salt, steel powder, or oil smoke exists

Place of high temperature and humidity

The unit body and the terminal cover are made of plastic resin.

Please do not give any vibration or shock and avoid reckless handling.

Ⅱ-2

Wiring

Please see the wiring diagram to start wiring.

If necessary, please connect output lines and alarms to the other equipments.

Before wiring to the sensor, please measure the resistance value on the terminal block

to confirm there is no faulty wiring.

Sensor

Parts

TB Series

Cell MΩ

SG Series

CG

-SⅠ、Ⅱ

CG -S

Cell Heater

20Ω 15

RTD

*The resistance values of Cell Heater and RTD might exceed the above values because of

the effect of the temperature (room or furnace) of the installed place.

These values are just an indication.

±

15Ω 75

Please be careful for electric shock during wiring.

As a power switch and fuse are not built in this equipment, please set -up a breaker, a circuit protector, and a switch( +a fuse), etc.

Please use those power -off devices whose rated current is

TB Series ------ over 2A

SG ,CG-SⅠ,Ⅱ Series ------ over 3A

Please make a wiring which has sufficient power capacity to power terminal.

To avoid noise effect to signals, do not wire the signal line by using the same conduit

with motor, solenoid, SCR, actuator, and transformer, etc.

When the instrument is installed into the panel box, please keep the signal line as far

away as possible from the noise source like relay.

IM1006221DE C-28C INSTRUCTION MANUAL Ver.2.0 PAGE:6/21

Ⅲ.

Operation

1.

Turn on the power, and then it starts activating in Measurement Mode.

Upper Display shows the oxygen concentration (As an exception, Upper Display shows

Cell EMF when mV[Cell EMF] is selected on the range unit setting).

Lower Display shows Cell Temperature, Cell EMF, Range Number being used, Scale

Lower Limit Value, and Scale Upper Limit Value. Also Upper Display shows [----], or indication of the oxygen concentration or Cell EMF. This value is not true until warm

-up process is over.

2.

Warming up time varies according to sensors. The warm

-up process is considered to have been completed when Cell Temperature becomes about 735℃.

Always turn off the power when checking a sensor or exchanging a part.

It sometimes causes being electric shocked, the malfunction, the damage or the deterioration.

Ⅲ-1

Display Descriptions

Upper Display

Display Parameter

Key

Lower Display

Status Lamp

Upper Display:7 segments LED 4 digits, 20mm high

Lower Display:7 segments LED 4 digits, 14mm high

Display Parameter Lamps:TEMP/EMF(the unit shown on Lower Display)

TEMP=℃, EMF=mV

Display Status Lamps: from left, CAL, %, ppm, -O

2

, mV, AUTO, AL1, AL2.

CAL:Indicates it is in CAL Mode.

%, ppm, mV:Shows the selected measurement unit.

AUTO:Indicates when AUTO Range is selected.

No indication when Manual or Remote is selected.

AL1,AL2:Indicates ON/OFF Status of the 2 points of O

2

concentration Alarm.

Operation

IM1006221DE C-28C INSTRUCTION MANUAL Ver.2.0 PAGE:7/21

Ⅲ-2

Key Operation

Keys are button switches to select and change LED display descriptions and parameter values. There are the following keys:

Figures in the upper parenthesis indicates the description of Upper Display, and that in

the lower parenthesis indicates the description of Lower Display.

Key Types

:Used to change Lower Display in Measurement Mode and to change

modes.

:Used to fix the value being changed or confirmed to load it into the

memory. Also used to change into Calibration Mode.

Used to change the message characters or values.

▼ ▲

are displayed in the following sentences.

When using ▼▲ to change values, if a point is blinking in the lower right hand corner of the Display value, it means the value has not been changed yet.

Press CAL/ENT Key to fix the value.

1. Measurement Mode

Turn on the power, and then it starts activating in Measurement Mode.

LED display

Lighting position)

Upper

Display

Lower

Display

Remarks

○TEMP

MENU

○EMF 

MENU

MENU

No Display

MENU key

2 seconds or more

CAL/ENT key

2 seconds or more

○CAL

O

O

O

2

2

2

Value

Value

Value







Value



Auto change





Cell temp(℃)

Cell EMF(mV)

Scale lower

Scale upper

Setting Mode

Calibration Mode

IM1006221DE C-28C INSTRUCTION MANUAL Ver.2.0 PAGE:8/21

2. Setting Mode

Press MENU Key for more than 2 seconds, then it is changed into Setting Mode.

To go back to Measurement Mode, press MENU Key for more than 2 seconds again.



Measurement Mode)



MENU(2 seconds or more)



▲▼



Measurement unit,Output scale setting

CAL/ENT



CAL/ENT

MENU



MENU

▲▼

CAL/ENT



MENU

▲▼

CAL/ENT





MENU

▲▼

CAL/ENT



To change and confirm the range to use.

There is no setting in the

-O2 version.)

 :%、: ppm、:mV

CAL/ENT(It subscribes when pressing once after content change

and advances towards the following item when pressing once again.)

Decimal point setting.

There is no setting in the mV and -O2 version.)

--- 1or2、ppm --- 0or1

CAL/ENT(It subscribes when pressing once after content change

and advances towards the following item when pressing once again.)

Output scale setting(Scale lower)







MENU

▲▼

CAL/ENT(It subscribes when pressing once after content change

and advances towards the following item when pressing once again.)

Output scale setting(Scale upper)



CAL/ENT(It subscribes when pressing once after content change

and advances towards the following item when pressing once again.)

Note 1) When you set the range width, if the width is so small

the output value will not be stable.

Please set it in the range as wide as can be used.

Note 2) Output scale can be set at each unit like %,ppm,and mV.



▲▼



CAL/ENT

MENU

CAL/ENT





MENU

▲▼

Unit selection・Switch to auto range

Unit selection,Switch to auto range.

(It is not displayed auto and ppm at the

-O2 version)



:%、: ppm、:mV、:Auto range



CAL/ENT(It subscribes when pressing once after content change

and advances towards the following item when pressing once again.)

Note 1) Auto Range Mode:

Ranges and units change automatically according to the O2

concentration which was detected between % ~ppm ranges.

Note 2) The relation between % and ppm is as follows.

1%O2----10000ppmO2

Note 3) When set to Auto Range Mode

Upper limit of ppm range is to be changing point.

Example: % Range is 0-25%,ppm Range is 0-1000ppm,

when O2 concentration of the sample gas goes down gradually from the

air(20.6%) to 120ppm, the value from 20.6% to 0.1% is displayed by

% Range,and the value 0.1% and less is displayed by ppm Range.

This is automatically changed.

Note 4) When it is Auto Range Mode, AUTO status display is lighted on.

IM1006221DE C-28C INSTRUCTION MANUAL Ver.2.0 PAGE:9/21



▲▼



Alarm setting

CAL/ENT





MENU

▲▼

CAL/ENT







MENU

▲▼

CAL/ENT



MENU

▲▼

CAL/ENT



How to use Alarm 1 Note 1

:

No use、:Upper limit with standby、

:

Lower limit with standby、:Upper、:Lower

CAL/ENT(It subscribes when pressing once after content change

and advances towards the following item when pressing once again.)



Alarm1:unit setting.

The display is not in ppm at  and the -O2 version.)

:%、: ppm、:mV

CAL/ENT(It subscribes when pressing once after content change

and advances towards the following item when pressing once again.)

Alarm1:Value setting(There is no display at .)



MENU

CAL/ENT









CAL/ENT







MENU

▲▼

CAL/ENT

MENU

▲▼

MENU

▲▼

CAL/ENT



MENU

▲▼

CAL/ENT

CAL/ENT(It subscribes when pressing once after content change

and advances towards the following item when pressing once again.)

Alarm1:Hysteresis setting.

(There is no display at .) Note 2

CAL/ENT(It subscribes when pressing once after content change

and advances towards the following item when pressing once again.)



How to use Alarm2 Note 1

:

No use、:Upper limit with standby、

:

Lower limit with standby、:Upper、:Lower

CAL/ENT(It subscribes when pressing once after content change

and advances towards the following item when pressing once again.)



Alarm2:unit setting.

The display is not in ppm at  and the -O2 version.)

:%、: ppm、:mV

CAL/ENT(It subscribes when pressing once after content change

and advances towards the following item when pressing once again.)



Alarm2:Value setting(There is no display at .)





MENU

▲▼

CAL/ENT

CAL/ENT(It subscribes when pressing once after content change

and advances towards the following item when pressing once again.)

Alarm2:Hysteresis setting.

(There is no display at .) Note 2



MENU

▲▼

CAL/ENT(It subscribes when pressing once after content change

and advances towards the following item when pressing once again.)

Alarm operation type setting.(There is no display at 

and the

-O2 version. )Note 3

:

Display unit priority

:

Alarm setting unit priority

CAL/ENT(It subscribes when pressing once after content change

and advances towards the following item when pressing once again.)

Note 1 : Limit with standby

With standby is used to avoid giving alarms during warming up process. The values indicated

on a Zirconia O2 analyzer will not be true values until it reachs the specified temperature

after power-up.

Note 2 : Hysteresis setting

Hysteresis is set to prevent oxygen concentration value from going up and down around the

Alarm set-up value in a short time and also to prevent alarms from being turned ON and OFF

frequently.

Note 3 : Alarm operation type setting

Alarm setting value and hysteresis can be saved for each unit.

The inside software caiculates by the units of ranges being used, however it is not possible

to set how to use by unit.

IM1006221DE C-28C INSTRUCTION MANUAL Ver.2.0 PAGE:10/21



▲▼



Setting related to correction

CAL/ENT





▲▼



Clear of user calibration value

 :

No clear :Clear

CAL/ENT

CAL/ENT or MENU



MENU

▲▼

CAL/ENT





MENU

▲▼

CAL/ENT

Cell temp adjust  Note 1

Setting range : -50~50℃

CAL/ENT(It subscribes when pressing once after content change

and advances towards the following item when pressing once again.)



Remote proofreading standard value. Note 2

Setting range:20.60~20.90

MENU

CAL/ENT





MENU

▲▼

CAL/ENT





MENU

▲▼

CAL/ENT



CAL/ENT(It subscribes when pressing once after content change

and advances towards the following item when pressing once again.)



Amount of shift of

+%O2 side.(It is possible to set it in

Setting range: -20.0~20.0mV the -O2 version.)

CAL/ENT(It subscribes when pressing once after content change

and advances towards the following item when pressing once again.)



Amount of shift of

-%O2 side.(It is possible to set it in

Setting range: -20.0~20.0mV the -O2 version.)

CAL/ENT(It subscribes when pressing once after content change

and advances towards the following item when pressing once again.)



Effective or invalidity of shift.(It is possible to set it in

the -O2 version.)



MENU

▲▼

CAL/ENT



MENU

▲▼

CAL/ENT



MENU

▲▼

CAL/ENT





CAL/ENT



MENU

▲▼

CAL/ENT(It subscribes when pressing once after content change

and advances towards the following item when pressing once again.)

Temperature display filter

Setting range:0~99 second

CAL/ENT(It subscribes when pressing once after content change

and advances towards the following item when pressing once again.)

O2 Concentration filter(%)

Setting range:0~99 second

CAL/ENT(It subscribes when pressing once after content change

and advances towards the following item when pressing once again.)



O2 Concentration filter(ppm)(It possible to set it in

Setting range:0~99 second the -O2 version.)

CAL/ENT(It subscribes when pressing once after content change

and advances towards the following item when pressing once again.)

Note 3



Version number

Note 1 Cell temp adjust:

This is to improve cell EMF by making up and down the cell heater temperature when changing

the cell or when the cell EMF is getting weak because of long time use. The value can be

set from ±25℃ makes the cell temperature go up and makes it go down.

This adjustment should be made while watching the cell EMF carefully.

It is please for details our company.

Note 2 SPAN Remote calibration:

Flow span gas (air:20.6~20.9%),then momentary short the terminal No.17-20.

If the proofreading of a front panel is executed,this proofreading is cleared.

Note 3 Filter:

When the respons speed of meter indication and output is too fast or not steady,

then increase the filter value to reduce the answer speed and unsteadiness.

The unit is seconds.

IM1006221DE C-28C INSTRUCTION MANUAL Ver.2.0 PAGE:11/21

*1

<Table 1: An Example of AUTO Range Setting>

Table 1 shows the shift of transmission output when the scale setting was changed to

AUTO Range on the scale setting. [% range:0~25%, ppm range:0~10000ppm]

Output will change along the heavy line in Table 1.

The system’s software searches the MAX. Value (Full Scale Value) of each range

then determines which range is corresponding to the Cell EMF.

EXAMPLE: If the sample gas concentration is changing from AIR(20.6%) to 100ppm,

the indication and output of the analyzer set by the above range changes

as follows:

Indication : 20.6%→ 1%⇔10000ppm→100ppm

Output : 17.18→ 4.64⇔20.00 →4.16 (mA)

*2

<Table 2: An Example of Scale Setting>

IM1006221DE C-28C INSTRUCTION MANUAL Ver.2.0 PAGE:12/21

Scale Setting is used when to determine by SCL.L the % of oxygen concentration

to which the transmission output of Zero side(V output:0mA output:4mA) respond,

and also to determine by SCL.H the % of oxygen concentration to which the

transmission output of Span side(V output:1 or 5 or 10V, mA output:20mA) respond.

Although only % is shown in Table 2, it is the same for ppm, atm, and Cell EMF

mV. In Table 2, the horizontal axis indicates oxygen concentration (%), and the

vertical axis indicates transmission output values(voltage and current).

Line(1): Output setting is for 0

-25%.

Input Values:SCL.L=0.00, SCL.H=25.00

Line(2): Output setting is for 50 -0%. In this case the increase and

decrease direction of O

2

concentration and that of output are

reversed.

Input Values: SCL.L=50.00, SCL.H=0.00

Line(3): Output setting is for 10 -40%. In this case Zero side is shifted

from O

2

concentration 10%.

Input Values: SCL.L=10.00, SCL.H=40.00

Line(4): Output setting is for 0

-100%. This output setting is for the

total range of O

2

concentration indicated on the unit.

Input Values: SCL.L=0.00, SCL.H=100.00

IM1006221DE C-28C INSTRUCTION MANUAL Ver.2.0 PAGE:13/21

Ⅲ-3

Calibration Mode

Press CAL/ENT Key for more than 2 seconds, then it turns to be Calibration Mode.

This mode is to correct difference between the ideal curve of oxygen concentration and the sensor.

When calibrating each range separately, it is possible to calibrate all the units

(%, ppm and mV).





Measurement Mode)

CAL/ENT(2 seconds and more)

CAL/ENT





CAL/ENT



.

▲ ▼

MENU

MENU

▲ ▼



.

CAL/ENT





CAL/ENT

Select Zero/Span Calibration

:

Zero Calibration

:

Span Calibration

MENU





Set Span Calibration Value

Display Blinking (▲▼Key) 





CAL/ENT

CAL/ENT

MENU

Set Zero Calibration Value

Display Blinking (▲▼Key)





Input

Span Calibration Value





MENU

Input

Zero Calibration Value

CAL/ENT

CAL/ENT

Press MENU Key for more than 2 seconds to go back to Measurement Mode.

If by ▼ ▲ operation a point is blinking in the lower right -hand corner of the value in the display, it indicates that the calibration value has not been changed. Press

CAL/ENT Key to fix the value.

Only the range which was chosen by the Setting Mode:[ Unit selection:] can be calibrated.

When calibrating the other range, the unit range must be changed by the Setting

Mode.[ Unit selection:]

If you want to stop during the process, press MENU Key once to go back to

Calibration Mode. Unless CAL/ENT Key is not pressed, the operation mistake will not be input in the memory.

IM1006221DE C-28C INSTRUCTION MANUAL Ver.2.0 PAGE:14/21

Please be sure that this example is just an embodiment and the set values

(Range Number and Calibration Gas Concentration) are not the same as User’s set values. Also, N

2

Gas can not be used as Zero Gas. Please use O

2

/ N

2

Gas with concentration identified.

EXAMPLE: The following setting is

Air:20.6%, Standard Gas:0.90%O

2

9000ppm),1000ppm O

2

Calibration of % Range

1) Press CAL/ENT key for more than 2 seconds, then  is shown in the upper display and  is shown in the lower display.

When executing span calibration continuously, press CAL/ENT key again.

2) The current concentration is shown in lower display. Introduce Air now.

After the oxygen concentration becomes stable, adjust the value to 20.60% by using

▲ and press CAL/ENT key. Span calibration is now completed.

3) Press CAL/ENT key again.

Then  is shown in the lower display, so change it to  by using ▼ ▲.

4) Flow a standard gas of 0.90% O

2

and operate by the same step as span calibration.

Now Zero/Span Calibration at % range is completed.

5) Press CAL/ENT key or MENU key once, then  is shown in the upper display and



is shown in the lower display again.

Press CAL/ENT key for more than 2 seconds to go back to Measurement Mode.

NOTE: It is possible to calibration span or zero in any order.

NOTE: When you use the minus O

2

% range the calibration of a minus side is

automatically executed by calibrating of % range above-mentioned.

Calibration of ppm Range

The steps are almost the same as Calibration of % Range. Select ranges by ppm unit numbers.

The following example uses the setting ; Span Gas: 0.9%(9000ppm) and Zero Gas:

1000ppm.

Calibration of Auto Range

The auto range function is released, and calibration of % range and ppm range is needed individually.

NOTE: If the indicated value varies significantly or shows abnormal value after

calibration, setting error of calibration value or gas injection error is

considered. Carry calibration once again. If it cannot turn back to be normal,

‘Clear of the Calibration Value’ on Page 10th.

In that case the calibration curve will go along with the theoretical value, so re

-calibration will be needed to adapt to the actual sensor EMF.

IM1006221DE C-28C INSTRUCTION MANUAL Ver.2.0 PAGE:15/21

NOTE: When calibrating either one of Zero or Span, the data of the one not calibrated

will be the same as the previous data.

NOTE: The shipping value of the calibration curve will be the value based on the

theoretical value when shipping stand -alone of this unit, or it will be the

calibration value resulted in our test when shipping by combination with the

sensor. So calibration of combining with the sensor will be needed by user if

shipped stand

-alone.

NOTE: About Zero/Span Gas at calibration

When separate Full Scale of the range to be used in halves, Zero Gas is the

gas with concentration in the lower half, and Span Gas is the gas with

concentration in the upper half.

Make any operation mistakes such as reversing the gas order at introducing

Zero/Span Gas or using the same gas for Zero -Span. By such an error the

calibration curve will not indicate the appropriate O

2

concentration as it goes

far off from the allowable limits of error. Please carry re

-calibration or clear

the calibration value and then re -calibrate to turn it back to be normal.

It is often because of other causes such as blockage, clogging of sensor filter, and lack of gas flow that situation like low cell EMF takes place. So please do not force calibration before investigating other causes.

Please refer to ‘Troubleshooting Chart’ on Page 20

One Point Gas Calibration

When calibrating 1 point gas only to make it simple, please do not carry it by operating in Calibration Mode as there will be errors in the calibration curve.

In that case, short the Remote Calibration Contact Point on the rear terminal block by using Air. This feature enables One Point AUTO Calibration by combining Magnet Valve, Timer, Relay, and Sequencer that provide Air.

IM1006221DE C-28C INSTRUCTION MANUAL Ver.2.0 PAGE:16/21

*3

<Table 3>

Line(1) shows that the indication of O

2

Analyzer and the true O

2

concentration are completely matched.

Line(2) has the same rising gradient and the different intercept as Line(1).

Line(3) has the different gradient and intercept from Line(1).

The secular change of cell EMF sometimes shows the same condition as (2) or(3), and it is hard to determine which line the product would follow because it is affected by the use conditions such as contents of the sample gas and ambient atmosphere.

In Simple One Point Calibration, (2) is considered to be the secular change of cell EMF and the calibration curve is determined at Air only and then

shifted(parallel shift).

On the contrary, the operation in Calibration Mode is to adjust (3). As in One

Point Calibration at either Zero or Span, only one point is changed and the

existing data is used for the other point, the condition of (3) cannot be changed

to (1). So please be sure to calibrate 2 points.

IM1006221DE C-28C INSTRUCTION MANUAL Ver.2.0 PAGE:17/21

Ⅳ.

Communication Specifications

(1)

Communication Specifications

Transmission Method: half

-duplex asynchronous method (bowling selecting method)

Transmission Rate :9600 bps Parity Bit :not available

Start Bit :1 bit

Data Length :8 bit

Stop Bit :1 bit

Character Code :ASCII codes

(2)

Transmission Types

Type

Transmits one data in about 1 second.

Normal Situation: STX ① ②②②②②②② ③ ETX CR

①Alarm State 0:No Error, 1:AL1 ON, 2:AL2 ON, 3:AL1, 2 ON

②Measurement Data

③Measurement Unit %=%, P=ppm, V=mV

Error Situation: STX E① ETX CR

Error Code 1 at Heater break or RTD break

Type

Transmits one data in about 1 second.

Normal Situation: STX ① ②②②②② ③ ETX CR

①Alarm State Space:No Error, 1:AL1 ON, 2:AL2 ON, 3:AL1,2 ON

②Measurement Data Data format differs according to the measurement data.

③Measurement Unit %=%, P=ppm, V=mV

Error Situation: STX ①E② ETX CR

Space

Error Code 1 at Heater break or RTD break

Type

Transmission and reception of data are possible.

ENQ ①① STX ②②②②② ETX BCCL BCCH CR LF

①Model Number

②Transmitting and Receiving Data

(The digit number differs according to the data.)

FUNCTION DESCRIPTION

Real Data Requirement read

-out of temperature, O and the using range

2

concentration, alarm status,

Range Setting

AUTO/Manual Change reading and writing of range setting reading and changing of AUTO/Manual/Remote

Alarm Setting

Remote Calibration

Standard Value

Filter Setting for

Cell Temperature

Filter Setting for

Oxygen Concentration reading and writing of alarm setting reading and writing of Remote Calibration standard value reading and writing of the filter for cell temperature reading and writing of the filter for O

2

concentration

IM1006221DE C-28C INSTRUCTION MANUAL Ver.2.0 PAGE:18/21

Ⅴ.

Parameter List

MENU ITEMS

MENU

Cell Temp.

Cell Voltage

Upper

Display

O

2

Measurement value

O

2

Measurement

Value

Lower

Display

Operation Set Value at shipping value MENU About 735℃

Scaling

Value

O

2

Measurement

Value value

MENU

Display automatically changed in 3 second cycle

Scale Vale at Lower and Upper Sides

Remarks unit for mV

SCL.L

SCL.H

MODE ITEMS

MODE No.

Upper

Display



Lower

Display

– – –

Operation Set Value at shipping

CAL/ENT

– – – – – –

Remarks

RANGE









 value

CAL/ENT

CAL/ENT

Requested Spec.

Requested Spec.

Range settings

:

%

: ppm

: mV

There is no setting in the -O

2 version.)

Decimal point setting

:

1 or 2

:

0 or 1

There is no setting in the -O

2 version.)





 value value

– – –

CAL/ENT

CAL/ENT

CAL/ENT

Requested Spec.

Requested Spec.

– – – – – –

Lower Limit Value of Scaling

Lower Limit Value of Scaling

MODE

ALM















– – –







CAL/ENT

CAL/ENT

CAL/ENT unit for range

Requested Spec.

PECE when no request

– – – – – –

To be set only when requested.

Normally:NO

Display unit selection

When AUTO Range is requested, the range indication is fixed according to which range limit the cell EMF belongs to.

(There is no indication of ppm and

AUTO in the -O

2

version)

Alarm Settings

: no alarms

:

Upper Limit Alarm with standby

:

Lower Limit Alarm with standby

:Upper Limit Alarm

:Lower Limit Alarm









 value

CAL/ENT

CAL/ENT

To be set only when requested.

Normally no indication on this item.

To be set only when requested.

Normally no indication on this item.

If AL1 is NO, then no indication.

There is no setting in the -O

2 version.)

If AL1 is NO, then no indication.

IM1006221DE C-28C INSTRUCTION MANUAL Ver.2.0 PAGE:19/21

 value

CAL/ENT

To be set only when requested.

Normally no indication on this item.

Hysteresis

If AL1 is NO, then no indication.







 the same setting as AL1









 value

– – –



 value value

CAL/ENT

CAL/ENT

CAL/ENT

CAL/ENT

CAL/ENT

To be set only when requested.

Normally no indication on this item.

– – – – – –

Normally: NO

Normally: 0

20.75

Selection of alarm operation

There is no setting in the -O

2 version.)

Expanded function

YES by CLEAR of Calibration Value

Correction of temperature of cell

Air Concentration Value when using

Remote Calibration(20.60~20.90)

R.ADJ





 value value

CAL/ENT

CAL/ENT

CAL/ENT

Setting only when -O

2 version.

Normally no indication on this item.

Setting only when -O

2 version.

Normally no indication on this item.

Setting only when -O

2 version.

Normally no indication on this item.

Amount of shift of +%O

2

side

It is possible to set it in the -O

2 versions.)

Amount of shift of +%O

2

side

It is possible to set it in the -O

2 versions.)

Effective or invalidity of shift



 value value

CAL/ENT

CAL/ENT

Normally: 3

Normally: 3

Temperature Display filter, number of seconds

O

2

Concentration Filter (%), number of seconds

 value

CAL/ENT

Normally: 10

O

2

Concentration Filter (ppm), number of seconds

 value CAL/ENT

– – – – – –

Product version

IM1006221DE C-28C INSTRUCTION MANUAL Ver.2.0 PAGE:20/21

Ⅵ.

Troubleshooting Chart

1.Troubleshooting of temp. control

Power

Turn on

Check enough power voltage

Turn on breaker

Exchange fuse

Repair wiring

NG

NO

Check power voltage , fuse, breaker, and wiring

7 seg. LED Display

(Indicate value,Temp.) flicker

YES

Temp. Display flicker

(Over range)

YES Turn on, then turn off

*1

GOOD

NO

Wait about 20 minutes NO Temp. Display flicker

Exchange/Repair of control unit

GOOD

YES

Measure the residence value of RTD

*2

Temp. display is stable at about 735℃

YES

NORMAL

Temp display is almost room temp.

(Defect of sensor's heater)

NG

Exchange sensor assembly

*3

1

When the temperature greatly exceeds from standard value (735℃) or makes over range, it will be judged to occur broken RTD or almost broken RTD. Turn off the power and measure the residence value of heater and RTD. Standard residence value is on 5th page. If there is no problem on sensor, the converter might be broken.

2

If users have stocks, exchange it. In this case, the calibration has to be made. If you need the repairing of control unit, return to manufacturing factory.

3

When exchanging sensor assembly, always turn off the power of control unit. When exchanging a sensor in the condition as it turns on, sensor breakage might be occurred. A defect of sensor is possible to due to a defect of control unit. So take care of the temperature increasing after exchanging sensor and turning on. If the temperature increases extremely just after turning on or increases over 10 degree from standard value, turn off the power immediately. In this case, return the both of sensor and control unit to manufacturing factory.

NOTE

Sensor breakage might occur not only just after turning on but also during measures.

In that case, investigate where there is a defect.

IM1006221DE C-28C INSTRUCTION MANUAL Ver.2.0 PAGE:21/21

2.Troubleshooting of measuring

*1

Induce sample gas

Exchange sensor assembly

NO

Over range or higher than expecting value

YES

YES

Indication hunting

NO

YES

NO

Lower indication than expecting

Proper Cell EMF

YES

NO Inducing ZERO gas

Proper indication value

YES

Make calibration

Indication hunting when inducing ZERO gas

NO

NORMAL

Combustible matter is included in Sample gas/

There is a blocking

NO

Exchange sensor assembly

GOOD

YES

NO

YES

Remove

Combustible matter/

Blockade

Check TB filter

Check the following

  1.Sample pipe blockade

  2.Defect of sample pressure

  3.Leakage of sample pipe

4.Combustible gas mixing

*3

Check the following

  1.Sample pipe blockade

  2.Defect of sample pressure

  3.Leakage of sample pipe

4.Combustible gas mixing

*2

NG

Exchange

TB filter

1 Do this troubleshooting in measurement in the presupposition which doesn't have the trouble of the temperature -control.

2 There are some ways to induce the sample gas. It is needed to refer to the flow diagram and investigate the true cause of trouble. For example if it is found the cause of trouble is the defect of sample pressure, cleaning of pump valve or exchanging pump have to be done in fact to return normal status

3 Exchanging TB filter is effective for making a long life of cell. Always exchange if it becomes dirty and has a defect.

NOTE

The judgment of dirt

Remove TB filter and check inside, if inside of filter becomes dirty, exchange it.

4 In the case the change of indication is extremely small or big comparing with the change of the

cell voltage, there might be mistake of calibration. Make to clear the calibration once and

confirm the indication. Clear the calibration setting value if the status is almost normal,

it is not needed to exchange the sensor assembly and continue to make a right calibration.

0

+1

92

0mm beyond 5

96

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