Measurement object

Oxygen concentration in combustion exhaust gas and mixed gas.

Measurement system

Zirconia system

Display

6-digit LCD

Switch

Three optical switches

Explosionproof Approval

ZR202S-A (ATEX); EExd II B + H2, Group II, Category 2GD, T2, T300℃
ZR202S-B (FM); Class I, Division1, Groups B, C and D, Class II/III, Division1, Groups E, F and G, T2
ZR202S-C (CSA); Class I, Division1, Groups B, C and D, Class II/III, Division1, Groups E, F and G, T2
ZR202S-D (IECEx); Exd II B + H2, T2, ExtD A21 IP66 T300℃

Oxygen concentration

0.01 to 100 vol% O₂

Output signal

4 to 20 mA DC, one point (maximum load resistance 550Ω)

Measurement range

Any setting in the range of 0 - 5 vol%O₂ to 0 - 100 vol%O₂ (in 1 vol% O₂), or partial range.

Digital communication (HART)

250 to 550Ω, depending on number of field devices connected to the loop (multi-drop mode)

Sample gas pressure

- 5 to + 5 kPa
No pressure fluctuation in the furnace should be allowed.

Sample gas temperature

0 to 700℃

Probe length

0.4, 0.7, 1.0, 1.5, 2.0 m

Contact output

Two points (one is fail-safe, normally open)

Contact input

Two points

Calibration

Method; zero/span calibration
Calibration mode; automatic, semi-automatic and manual (with optical switch)

Construction

Equivalent to NEMA4X/IP66

Ambient temperature

-20 to +55℃ (- 5 to +70℃ on the case surface)

Power Supply

85 to 264 V AC, 45 to 66 Hz

Repeatability

±0.5% Maximum value of set range

Linearity

±1% Maximum value of set range

Drift

±2% Maximum value of set range/month

Response time

90% response within 5 sec