MEXA-7100FX

MEXA-7100 FX System Configuration

Measurement Components>

CO: min. range 0 ppm to 100 ppm, max. range 0-12 vol%
CO2: min. range 0-5000 ppm, max. range 0-20 vol%
NO/NOx: min. range 0-10 ppm, max. range 0-10000 ppm
THC: min. range 0-10 ppmC, max. range 0-50000 ppmC
O2 (optional): min. range 0-5 vol%, max. range 0-25 vol%

Principle

CO: non-dispersive Infrared method (NDIR)
CO2: non-dispersive Infrared method (NDIR)
NO/NOx: chemi-luminescence detection (CLD), heated, vacuum-type
THC: flame ionization detection (FID), heated
O2: magneto-pneumatic detection (MPD)

Analyzer Models

In ANR unit (with dehumidification):
AIA-7210AF: CO(L) analyzer (for under 5000 ppm CO)
AIA-7220F: CO(H), CO2 analyzer (for over 5000 pm
CO, and CO2)
MPA-7200F: O2 analyzer by MPD (optional)

In 19-inch type heated analyzer unit (without dehumidification):
CLA-756F: NO/NOx analyzer (vacuum type)
FIA-726F: THC analyzer

Sample Line

One line for raw exhaust gas without dilution (direct measurement line)

Sample Gas Flow>

Approx. 15 L/min

Sampling Tube

f8/f6 heated tube, max. 10 m for 200-240 V type (without pre-filter),
f6/f4 heated tube, max. 6 m for the following systems:
- 100 V and 120 V type (without pre-filter)
- with pre-filter (HF-10, optional) *2
- high-pressure type (optional)

Sample Handling Temperature

Approx. 113° C + 8° C or approx. 191° C + 6° C,
either to be specified

Dimensions and Weight

W x D x H

570 x 850 x 1970 mm
22.4 x 33.5 x 77.6 in
Approx. 300 kg / 661 lb

MEXA-7100FX Operating Conditions

Calibration>

Zero gas (100 kPa +10 kPa):
- for FIA:
high-purity N2 (99.99% or more) or
high-purity air (THC impurity below 0.1 ppmC,
O2 conc. 20-21 vol% (stable))
(either to be specified)
- for the other analyzers:
high-purity N2 (99.99% or more)
Span gas (100 kPa +10 kPa):
- for FIA: C3H8 / N2 or air (either to be specified)
- for the other analyzers: each component gas / N2

Operation Gases

- CLA ozone-source gas: O2 (purity 99.99% or more),
100 kPa +10 kPa, approx. 300 mL/min (standard)
- FIA fuel gas: H2/He 39.0 vol% to 41.0 vol%,
100 kPa +10 kPa, approx. 150 mL/min (standard)
- FIA burner air: high-purity air,
100 kPa +10 kPa, approx. 160 mL/min (standard)
- MPA carrier gas: high-purity N2,
100 kPa +10 kPa, approx. 20 mL/min(standard)
- Purge gas: compressed air (without oil mists, THC below
10 ppmC), 400 kPa + 50 kPa, approx.20 L/min
(standard, when purging)

Power Supply

One of the following (fixed, to be specified):
- 100 V + 10 V AC, 50/60 Hz + 0.5 Hz, single phase
- 120 V +12 V AC, 60 Hz + 0.5 Hz, single phase
- 200 V + 20 V AC, 50/60 Hz + 0.5 Hz, single phase
- 220 V + 22 V AC 50 Hz + 0.5 Hz, single phase
- 230 V (207-250 V) AC, 50 Hz + 0.5 Hz, single phase
- 240 V (216-to 250 V) AC, 50 Hz + 0.5 Hz, single phase

Power Capacity

Approx. 3.8 kVA as max., approx. 2.0 kVA at stable state
(for 200 V type, including heated sampling tube [10 m])

Ambient Conditions

5-40°C, less than 80% as relative humidity

Sample Inlet Pressure

Standard type: 0 kPa to 30 kPa

High-pressure type (optional):
-10 to 300 kPa, by installing pressure regulator in SHS

Sample Gas Temperature

Under 220° C at inlet of sampling tube

H2O Concentration in Sample Gas

Under 15 vol%

MEXA-7100FX Performance

Response Time of Analyzers T10-90

CO(L): less than 0.9 s
CO(H), CO2: less than 0.8 s
NO/NOx: less than 0.9 s
THC: less than 0.4 s
O2: less than 0.75 s

(from CAL inlet of each analyzer at standard flow rate for each)

Response Time Td (as system)

CO(L): less than 3.5 s
CO(H), CO2: less than 3.5 s
NO/NOx: less than 2.8 s
THC: less than 2.0 s
O2: less than 3.5 s

(from sample inlet, with f8/f6 heated sampling tube
[10 m], without pre-filter, at flow rate of 15 L/min)

Response Time T10-90 (as system)

CO(L): less than 1.1 s
CO(H), CO2: less than 1.1 s
NO/NOx: less than 1.0 s
THC: less than 0.7 s
O2: less than 1.0 s

(from sample inlet, with f8/f6 heated sampling tube
[10 m], without pre-filter, at flow rate of 15 L/min

Response Time Td + T90 (as system)

CO(L): less than 5.0 s
CO(H), CO2: less than 5.0 s
NO/NOx: less than 4.0 s
THC: less than 3.0 s
O2: less than 5.0 s

(from sample inlet, with f8/f6 heated sampling tube
[10 m], without pre-filter, at flow rate of 15 L/min)

Noise

CO(L): within +1.0% FS
CO(H), CO2: within +1.0% FS
NO/NOx: within +1.5% FS (range under 20 ppm)
within +1.0% FS (range over 20 ppm)
THC: within +1.0% FS
O2: within +1.0% FS for zero
within +1.5% FS during measurement

(as peak-to-peak width in 5 minutes)

Linearity

Within +1.0% FS or +2.0% of readings, whichever is smaller

Repeatability

Within +0.5 FS

Zero/Span drift

Zero: within +1.0% FS per 8 hours
Span: within +1.0% FS per 8 hours
(fluctuation of ambient temperature within +5° C)

Range Correlation

Within +1.0% FS of upper range for each analyzer

Interference for CO(L)

CO2 16 vol% + 4° C saturated H2O: within +3 ppm as CO readings
NO 1000 ppm: within +1 ppm as CO readings
C3H8 2000 ppm: within +5 ppm as CO readings

Interference for CO(H)

CO2 16 vol% + 4° C saturated H2O: within +1.0% of CO FS
NO 1000 ppm: within +1.0% of CO FS
C3H8 2000 ppm: within +1.0% of CO FS

Interference for CO2

CO 5000 ppm: within +1.0% FS (for under 6 vol% range of CO2)
CO 10 vol%: within +1.0% FS (for over 6 vol% range of CO2)

Interference for NO/NOx

CO2 16 vol%: within +3.0% of NO/NOx readings
H2O 15 vol%: within +3.0% of NO/NOx readings

Interference for THC

O2 0 vol% to 21 vol%: within +2.0% of THC readings (for C3H8 span gas of 350 ppmC + 75 ppmC)

Interference for O2

NO 1000 ppm: within +0.05 vol% as O2 readings

NOx Converter>Efficiency

95.0% or more (for 400 ppm to 500 ppm NO2)

Sensitivity for individual HC (FIA)

For CH4: 1.00 to 1.15
For C2H2, C3H6, n-C6H14, C7H8: 0.90 to 1.10
(for 350 ppmC + 75 ppmC standard gases)