WECAN 1389-4, Jung-dong, Gwangyang-city, Jeonnam - 545-880, Korea Internet: http://www.iwecan.co.kr 11/04/20

Tel. : +82 - 61/794 - 5177 Fax. : +82 – 61/794 - 5178 E-mail: info@iwecan.co.kr WK8864 / REV 5 ATEX

ANALYTICAL PROCESS INSTRUMENTATION

Extractive Zirconia

Oxygen Analyser

차폐된 전선을 통하여 센서로부터 500M까지 신호 전달

일반 또는 방폭 용 센서 케이스(EEx-d)

간편한 설치와 저렴한 유지비용

Microprocessor 기반의 컨트롤러

빠른 응답속도, 뛰어난 안정성과 민감성

기준 에어가 불 필요

M701 본체의 범위선택 기능, 절연된 출력

A51516

Meets European standard Directives:

- Directive 89/336/CEE - EN 61000-6-2: 2001 - EN 61000-6-3: 2001 - EN 50270: 1999 - Directive 73/23/CEE – 93/68/CEE

- Directive 94/9/CE ATEX

WK8864 / REV 5 ATEX -2-

센서 장치

...Performance Accuracy: the worst between ± 1% of reading (or 2 ppm with

M701) and ± 2% of reading (or 0.05% ppm with M701).

Repeatability: ± 0.5% of span (short term).

Response time: maximum for 1500 cc/min. flow rate: initial: 0.1

seconds; final: less than 1 second.

Drift: Zero: max. ± 1% of span per week. Span: negligible.

Ambient Temp. Influence: sensing unit: ± 0.06% of span /°C

Atm. Pressure Influence: 1% of reading per 1% change

in ambient pressure.

Sample flow rate influence: less than 0.5% of span over flow

range of 100 to 1000 cc/min.

Line Voltage Influence: 0.02% of span for each 1% change of

voltage.

Gas Interference: combustibles gases combine with oxygen

reducing the measurement.

...Operating Sample Requirements Sample Flow rate: 250 ÷ 1000 cc/min. Sample Pressure: 3000 Pa minimum (with filter and flow meter).

Linearization: within 1% of span accuracy (without auto

calibration)

Measuring Range: see suffix C on the ordering information.

Analogical Output: from 8864 to M701: logarithmic 50 mV/

decade. Direct from 8864: 4-20 mA isolated (on a max load of 500 ohm) linear and proportional to the selected range.

Logical Output: open collector, 30 Vdc, 30 mA max rating, for

not valid measurement indication. ù

Power Requirements: 24 Vac 50 VA directly or with 24 Vac

transformer 115/230 Vac; 50/60 Hz, 50 VA

Pneumatic Connections: ¼ ” or 6 mm OD tubing (compression

fittings supplied). Special for ppm ranges.

Wiring Connections: Standard housing: 2 openings for

G 3/8" (PG 13 cable grip). Explosion proof housing: 2 openings for GK 1/2" (cable grip or conduit).

Ambient Requirements: Relative Humidity: 90% maximum.

Temperature Range: -10 ÷ +50°C (14 ÷ 122°F); Warm-up: at 50°C; Storage Temperature: 70°C (158°F) max.

...Physical Material Contacting Sample Gas: AISI 316, Anticorodal,

Platinum-Iridium, Tefzel, Viton, Zirconia

Weight: 7 kg in Standard housing; 8,5 Kg. EEx-d housing

Dimensions: 150 x 150 x 290 mm (standard housing);

180 x 155 x 325 mm (explosion proof housing)

Finish: Epoxy grey textured enamel

Protection: IP65 (heavy duty)

Positioning: not critical

Power Supply for DIN or OMEGA rail mounting; Weight:

1,2 Kg.; Dimensions: 140 x 100 x 80 mm.

Specification...

된다면 절연된 선형 4-20mA 출력과 2 개의 옵션적인 구성

알람을 가지고 0.1ppm 의 해상도, 25% O2 까지 표시가 나

타나는 디스플레이에 지속적인 출력 범위를 선택하는 것이

가능하다.

작동원리

지르코니아 물질은 고온에서 고체 전해질처럼 작용하여, 2

개의 전극에 산소 분압의 차이가 발생하면 기전력을 발생

시키는 특성을 이용한 원리로 Nernst의 공식에 의해 출력

(mV)이 계산된다. E=RT/nF(Lg P02’ /P02")

R = Perfect gas constant (8,31 Joule/degree bulk) F = Faraday’s constant T = Absolute temperature in °Kelvin n = 4

8864 모델의 산소 측정기는 샘플링 시스템으로 이미 가스

측정을 하고 있을 때나 In-situ 측정이 용이치 않을 때 사용

될 수 있다. 연소 가스의 분석을 위해 디자인된 Zirconium

Oxide 추출 형태 장비로서, 8864 모델은 일반용과 방폭용

하우징으로 공급될 수 있으며 하우징은 열악한 공정 상태

하에서도 정확한 측정을 가능케하는, 견고하게 만들어진

알루미늄 구조이다.

주요 어플리케이션

- 순수한 가스에서 산소 측정 ppm)

- 식품 산업 (포장과 기계)

- N2 와 O2 발생기 또는 믹서

- 연소 가스가 아닌 곳에서 일반적인 산소 측정

8864 모델은 Reference air flow 가 필요치 않은 특별한

Zirconium 산소 측정 센서의 특징을 갖는다. 이 장비는 부

식이 크게 발생하는 곳에 사용 할 수 있게 디자인 되었다.

측정기 안에 포함되고 바로 센서와 연결되는 전기 회로는

주문 사양에 표시된 선택영역에 따라 직접 대수 신호 또는

선형 4-20mA 신호를 공급한다. 만일 모니터 M701 과 결합

Analytical Process Instrumentation

WCEng

Explosion Proof Housing

(optional) Protection Mode:

II GD EEx-d IIC T6 IP65 T85°C

Meets European Standard directive ATEX 94 / 9 / CE

Certificate Number: CESI 03 ATEX 130

A5160500

WK8864 / REV 5 ATEX -3-

Single or dual alarm

싱글 또는 듀얼 알람(옵션)

- 싱글 알람(High 또는 Low)

- 듀얼 알람(1 High+1 Low, 2 High, 2 Low)

알람의 구성

- 알람 경보 임계값을 구성하는 키보드

- 알람이 감지될 때 불이 들어오는LED

- 외부 시그널을 발생시키고 장비 동작을

중단 시키는 릴레이 접점

Description

- M701은 지르코니아 센서와 측정기로부터 오는 신호를 상세히 설명하며

산소 값(% 또는 PPM)을 계산하고 디스플레이 한다.

- 4-20mA신호를 재전송 하도록 디자인되어 있고 측정과 알람의 표 작성을

위해 외부 프린터와 연결될 수 있다.

Mounting

- 장치는 Panel 장착(기본)을 위한 컴팩트한 Noryl DIN케이스

- Wall장착을 위해 깔끔한 전면 도어를 가진 IP65케이스

- 특수한 지역에 장착을 위해 방폭 하우징 케이스

Analytical Process Instrumentation

WCEng

M701 Control Unit

Technical Specifications

Inputs Input signal: 1 from internal sensing unit operating at fixed temperature. Scanning time: 0,6 seconds Conversion type: double rampe Resolution: 1/20.000 Response time: 1 second typical Channel Isolation: none Input's impedance: 100 Mohm typical

Alarms (rating) Number of alarms: 2 on concentration (refer to suffix D and note 1) Contact: N.O./N.C. 1A @ 250 Vac Set: programmable on 100% of range Hysteresis: 5 / 1 / 0.5 / 0.1% of range Delay: 10 / 5 / 1 / 0.1 seconds Contact status: norm. triggered/not triggered Alarm scanning: ON/OFF programmable Threshold: high or low

Serial Interface Standard: RS 232 C Check lines: Cts Speed: 9600, 4800, 2400, 1200. 600, 300 baud/sec Parity: even, odd, none Isolation: 1500 V

Diagnostic TC out of order: err1 message on display CJ out of order: err2 message on display Anomalous conditions: OFL on display

Physical specification Dimensions: 96 x 96 x 185 mm. Weight: about 0,5 Kg. Mounting: on front panel (see suffix I)

Analogical output Output: 4-20 mA isolated proportional to 100% of range on maximum load of 500 ohm. Total range (over range): 3.6 - 24 mA Resolution: 1/3800 Isolation: 1500 V Updating time: 1 second

Clock Clock: Gregorian Back-up: by means of lithium battery Battery life: 1 year in case of power supply absence. Precision: 1 second/month

Message printing Periodical printing: programmable in hours, minutes Alarm printing: automatic Message printing: year, month, day, hour, minutes, %O2, temperature, alarm 1 status, alarm 2 status

Oxygen ranges Refer to suffix C.

Environmental conditions Working temperature: 0 50 °C

Storage temperature: -10 +75°C

Humidity: 10 90% without condense Power Supply:230/115 Vca; 50/60 Hz; 5 VA

M701 control unit dimensions

A5152

M701 in explosion proof housing

Protection mode: II 2 GD EEx d

IIC T6 IP65 T85°C Tamb -20 ÷ +60°C

for classified area ZONE 1 / ZONE 21

For wall or panel mounting Dimensions: 240 x 240 x 300 mm Function buttons outside the box Equipped with 3 Gk 3/4” holes

A51588

Inlet / outlet ports for sample gas

Rugged standard purpose water and dust proof cast aluminum housing

Inlet and outlet to analysis cell

Stainless steel cell block assembly

Electronic unit

Stainless steel handle

Rugged threaded cap

Sensing Unit M702 Control Unit

Reliable solid state Circuit Modular Construction

Std Sensing Unit dimensions A51142

ATEX Sensing Unit dimensions

A51143

Analytical Process Instrumentation

WCEng

Suffix H - Autocalibration (only with M702) 0 NO 1 Autocalibration 2 Autocal. + autocal. start inlet free contact 3 Autocal. + autocal. start inlet free contact with calibration in progress free contact Suffix I - Control unit 00 Without control unit and power supply 01 M702 (in alternative to M701) 02 M702 (alternative to M701) + IP65 housing 03 M702 (al ternative to M701) +

explosion proof housing 04 EC2001 (alternative to M702) 05 EC2001 (alternative to M701) +

IP65 housing 06 EC2001 (alternative to M701) +

explosion proof housing 07 7876 (alternative to M701) 08 7876 (a l ternat ive to M701) +

ATEX housing 09 M701 standard 10 M701 + IP65 housing 11 M701 + explosion proof housing 99 On specification Suffix O - Option 0 None 1 Transformer 2 Not Valid (NV) output in fail safe mode for

relay driving 9 On specification

Suffix P - Option 0 None 1 System Panel + Sample Condition System Note1: model 8864 is proposed combined with M701 con-trol unit. To have M702 unit, it’s necessary to select the 4-20 mA linear output from the sensing unit (“OD” in suffix C).

Suffix D - Alarms D1 - Alarm threshold 0 None 1 1 low alarm 2 1 high alarm 3 1 high alarm + 1 low alarm 4 2 low alarms 5 2 high alarms 9 On specification

D2—Wrong calibration and fault alarms (only with M702 control unit) 0 None 1 Wrong calibration alarm shared with

an alarm threshold 2 Fault alarm shared with an alarm

threshold 3 Wrong calibration alarm on relay 4 Fault alarm on separated relay 5 Wrong calibration alarm shared with

fault alarm 9 On specification

Suffix E – Alarm contacts 0 No contacts 1 Normally close when in alarm 2 Normally open when in alarm

Suffix F - RS232C output + clock 0 NO 1 YES

Suffix G - Sensing Unit 1 IP65 housing for sensing 2 ATEX housing for sensing

Suffix A - Line voltage 0 24 Vac 2 230 V 50/60 Hz 4 115 V 50/60 Hz Suffix B - Stream composition 1 Not corrosive background gases (not

combustibles) 9 Corrosive background gases or

special (not combustibles) Suffix C - Ranges 9999 On specification

MP01 0-100 ppm MP02 0-1000 ppm M001 0-1% M002 0-2% M005 0-5% M010 0-10% M025 0-25% M100 0-100% M101 10-100% M501 50-100% M801 80-100% M901 90-100% M951 95-100% M981 98-100% OD05 0-5% OD10 0-10% OD25 0-25%

OD= 4-20mA linear output, not isolated, propor-

tional to selected range, directly from Sensing Unit. ID05 0-5% ID10 0-10% ID25 0-25%

ID = as OD + galvanic isolated module supplied apart.

M = 4-20mA linear isolated output from M701 Control Unit (Sensing Unit out-

put is 50mV/decade for O2 variation, over a 0,1ppm to 100% O2 range.

주문코드 WK8864

A C B D E F G H O D

WK8864 / REV 5 ATEX -4-

P I