Micro Dilution Tunnel
The MDLT-ONE is designed to sample particulate emissions using the partial flow dilution method. A small portion of the total exhaust is diluted with HEPA* filtered air to create a constant flow rate through particulate filters to collect Particulate Matter (PM). Compliant to the latest regulations, the new MDLT-ONE is very compact and offers faster response by the use of high precision venturi flow meters and a piezo actuated valve.
*HEPA: High Efficiency Particulate Air
Heated filter system and flow controllers installed in a single rack. Swivel connection of tunnel section to cabinet allows flexible installation. Auto filter changer* can also be mounted in the main rack for space efficiency.
Automatic calibration software enhances accuracy and ease of use
The MDLT-ONE series performs automatic calibration by flowing air in-series through the two venturi flow meters and correcting any difference to zero in the software. This can be included into an automated sequence within a test template.
Integrated Operating Platform
HORIBA ONE series systems employ a common use interface, “HORIBA ONE PLATFORM” offering future expandability and ease of integration into Test Automation Systems.
PM Emission Measurement of All Engines
R&D Support of Engine and After Treatment System
EU: Euro VI (HDV)
US: 40 CFR Part 1065/1066
Japan: Post new long term
EU: Stage IV / V (NRMM)
|PM sampling method||Partial flow dilution method|
|Control modes for dilution||Proportional sampling mode (Const. split ratio)/ Fixed dilution ratio mode (Const. dilution ratio)/ Fixed flow rate mode (Manual control)|
|Control methods for dilution||・Real-time control based on analog input of exhaust flow rate|
・Control based on learned pattern of exhaust rate
|Required signal for gas sampling||Isolated analog signal (0 to 10 V)|
|Flow rate of diluted gas||25 to 80 L/min*1 (under the condition of 20 °C and 101.3 kPa)|
|Accuracy of dilution ratio||Within ± 5 % (excluding the system with AFIC)|
When dilution ratio=15 rate at 20 °C and 101.3 kPa: 35 to 80 L/min
|PM mass calculation*2||PM mass (in g/test, g/h or g/kWh) can be calculated and saved, based on integrated values of flow rated and dilution ratio.|
|System configuration||・Main unit: Dilution-tunnel unit|
・Operation unit: PC, monitor, keyboard and mouse (table is not included)
|Utilities||・Purified air: for dilution gas, 400 to 700 kPa, oil free, at least 120 L/min (at 20 °C and 101.3 kPa)|
|Power supply voltage and frequency||・Main unit: 100/110/120/200/220/230/240 V AC, 50/60 Hz, single phase|
・Operation unit: 100/110/120 V AC, 50/60Hz or 200/220/230/240 V AC, 50 Hz, single phase
|Power requirements||Main unit: Max. 3.0 kVA / Operation unit: Max. 0.5 kVA|
|Dimensions||・Main unit: 570 (W) × 730 (D) × 1700 (H) mm|
・Space for operation unit: 900 (W) × 500 (D) mm (table is not included)
|Mass||Main unit: Approx. 300 kg (excluding operation unit)|
|Number of filter lines||Max. 6 lines (5 for sample, 1 for bypass)|
|Type of filter holder||・φ70 mm type: actual PM sampling area φ60 mm, with back-up filter|
・φ47 mm type: actual PM sampling area φ37 mm*1, with back-up filter*1
|Sampling Pressure||Between atmospheric pressure and up to 40 kPa Back pressure of exhaust line: Less than 1 kPa|
|Filter auto-changer*3||Changer for automatic replacement of PM filter (φ 47 mm), both single-filter method and multi-filter method are available.|
|Valve switching||Additional air valve before filter (Replacement of sampling filter on bypass mode)|
|HOST interface*3||LAN communication using a 10 Base T port|
Conforms to IEEE802.3 (ISO880 2/3)
|Conditioner for dilution air / Compressor|
*1, For the filter face velocity in the regulations (less than 100 cm/s), the flow rate for the φ47 mm filter must be 65 standard L/min.
*2, Input the amount of PM collected on filter to calculate PM mass. It is necessary to input engine output (kW) to calculate the PM mass engine output (g/kWh).
*3, Please contact HORIBA, when you order.
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