WDG IV Cenelec0 pages

CENELEC WDG-IV oxygen
CENELEC WDG-IVC oxygen & combustibles

THERMOX

®

PROCESS INSTRUMENTS

flue gas analyzers for atex ii 2 g hazardous area
Close-coupled extractive design for direct measurement of flue gases up to 3000°F (1648°C).
Recommended for applications with natural gas and light oil or fuel.

SENSOR

Principle of Operation:
Close-coupled extractive
oxygen and combustibles
analyzer using zirconium oxide
for net oxygen measurement
and a catalytic detector for
combustibles. Completely field
serviceable.
Output Range:
Oxygen: From 0-1% to 0-100%
Combustibles: From 0-2,000
ppm to 0-10,000 ppm from
0-1% to 0-5%
Accuracy:
Oxygen: ±0.75% of measured
value or ±0.05% oxygen,
whichever is greater
Combustibles: ±2% of full scale output range
Response: Oxygen: 63% of step change < 20 s (cal gas) and < 130 s
(process gas)
Drift: < 0.1% of cell output per month (< 0.005% O2 per month with
2% O2 applied)

Aspirator Air Requirements: Oxygen: 20 psig ± 5%; Combustibles:
40 psig ± 5%
Max. Flue Gas Temp/Probe Type/Probe Length:
1300°F (704°C) / 316 SS / 36” to 108” (91 cm to 274 cm)
1875°F (1024°C) / 310 SS / 36” to 108” (91 cm to 274 cm)
3000°F (1648°C) / Hexoloy® / 24” - 72” (60 cm - 182 cm)
Max. Sample Dewpoint: 400°F (204°C)
Sample Pressure: Subatmospheric
Environment:
Ambient Temp.: -5°F to 160°F (-20°C to 71°C)
Relative Humidity: 10% to 90%, non- condensing
Enclosure:
Sensor:t CE 0081,

II 2 G, EEx d IIC T5 (IP 65)

T5: -5°F to 104°F (-20°C to 40°C)

T4: 104°F to 160°F (40°C to 71°C)

RCU:t

CE 0081,

II 2 G, EEx d IIC T6 (IP 65)

Power Requirements: 115 VAC, ±10%, 47-63 Hz, 600 VA max.;
230 VAC, ±10%, 47-63 Hz, 1850 VA max.
Calibration Gas Requirements: Use calibration gases @ 10 psig,
250 cc/min. (0.53 scfh)
O2 Span Gas: Air or from 1.0% to 100% O2, balance N2

Zero and Comb. Zero Gas: 2% or from 0.1 to 10% O2, balance N2

Comb. Span Gas: 60 to 80% (ppm ranges) or 40 to 60% (% ranges)
of the selected comb. recorder output range in certified mixtures of
CO + H2, 3 - 4% O2, balance N2

CONTROL UNIT

Display: Four-line x 20-character vacuum fluorescent. Displays
combinations of oxygen, % or ppm
combustibles, time and date, cell
temperature, user programmable
text, thermocouple mV or cell mV.
Password protection, programmable
pressure compensation and contextsensitive help are also provided.

Recorder Output: Two isolated linear
current outputs for oxygen and one for
combustibles. Select O2, combustibles, cell
temperature, thermocouple mV or cell mV. Each output can be
4-20 mA, 0-20 mA, 20-4 mA or 20-0 mA and is fully scalable.
Hold or track during calibration and select degree of damping.
Maximum load 1200 ohms.
Alarms: Two independent oxygen alarms, each high or low
selectable. One alarm can be assigned as oxygen, calibrate or
verify. Two high combustibles alarms. Set relays to energize or
de-energize on alarm.
Contact Rating: 0.5A, 30V, 10 VA max. noninductive load, AC
or DC
Diagnostics: Watchdog timer and service alarms. System test
for A/D, RAM, EEPROM and keypad. Display line 4 reserved
for full text error and diagnostic messages. Twenty entry event
log.
Communications: RS-485 2-way addressable
Environment:
Ambient Temp.: 14°F to 122°F (-10°C to 50°C)
Relative Humidity: 10% to 80%, non-condensing
Enclosure: Approved for CE 0081,
II 2 G, EEx d II C T6
(IP65). For non-hazardous area: optional weatherproof NEMA
4 (IP 56) wall/panel mount, GP (General Purpose) wall mount,
GP 19” rack mount, GP panel mount, or stainless steel weatherproof NEMA 4X (IP 56) wall/panel mount. All are UL Listed for
NEC Class I, Division 2 areas.
Calibration: Oxygen cell lifetime extender. Calibrate or verify
calibration. Store last calibration and verification data. Selectable calibration gas run time and process recovery time. Timed
automatic calibration with optional Remote Calibration Unit.
Power Requirements: Nominal 115-230 VAC ±10%, 47-63 Hz,
75 VA max.
SYSTEM COMPLIANCE:
ATEX Directive 94/9/EC
LCIE03 ATEX 6275X (Sensor)
LCIE01 ATEX 6028 (Controller)
EN50014 and EN50018
EMC Directive 2004/108//EC
Low Voltage Directive 73/23/EEC

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