To use this analyzer with safety and effectiveness, please read this manual before usage. This manual applies to the product model QRO-402(4/5gas analyzer). 1. This manual should be referred with regard to the product design and safety assurance of the configuration.
QRO-402 Chapter 1. Quality Guarantee Provision 1-1 Guarantee provision If the product is handled according to this manual but there occurs a failure within the guaranteed period, it will be repaired free of charge by our company. However, the compensation from the secondary damage and the following cases...
QRO-402 Chapter 2. Safety Instructions 2-1. Purpose of usage This analyzer is a equipment to measure the gas emission density of an automobile enabling to diagnose the automobile status and its preventive maintenance so that it can provide a function to prevent the air pollution in advance.
QRO-402 3-2/3. Front view and description QRO-402 3-3-1 CO display window This displays the CO density and program proceeding status. 3-3-2 HC display window This displays the HC density and program proceeding status. 3-3-3 CO2 display window This displays the CO2 density and program proceeding status.
QRO-402 3-4 Rear view and description 3-4-1 CAL(Calibration) This is a gas inflow gate used in time of standard gas adjustment. 3-4-2 INLET This is a measuring inlet where one end of the probe mounted into this inlet in time of gas emission measurement.
QRO-402 Chapter 4. Installation Methods and Notes 4-1 Installation 4-1-1 Fit end of the probe hose into the measuring probe and the other end of the hose into the gas inlet in the rear of the analyzer. If the fitting condition is not good and the air comes into flow from outside, it may yield an incorrect measured value.
QRO-402 4-2 Notes ▶ ▶ ▶ ▶ This analyzer is operated with AC110V only or AC220V only. Please verify the power source before use. (Note that you can not change power source which is fixed upon supplying this analyzer.) ▶ ▶ ▶ ▶ The following factors should be considered to properly locate the analyzer...
Please check the main filter housing's nipple is blocked. Press the Purge key to clean the inside Zero ERR of QRO-402 with a clean air for about Is remaining gas in the analyzer? (Zero Calibration error) 2-3minute. Verify again the connection...
QRO-402 Chapter 6. Measurement Mode Power ON Initialization Process (10 seconds) Self Diagnosis Warming up (between 2 and 8 minutes) Zero Calibration (20 seconds) STAND-BY Measurement Ready State 6-1. Measurement ① Place the probe in the clean air to perform the [ Zero calibration ].
ENTER key again to measure the exhaust gas for more than 30 minutes. ③ Pull the probe out of the exhaust outlet of the vehicle. Then clean the inside of QRO-402 with the clean air by pressing the PURGE key until the measurement values drop to 0.
QRO-402 6-3. Leak test A function that looks for any possible air leakage from the sample-cell in order to indicate the exact result. ① Press the MENU key once in the stand-by mode to select the Leak Test mode. λ...
QRO-402 6-4. Selection of fuel This is the function that selects fuel for testing vehicle. It is used to calculate air surplus rate (λ ) and AFR. This analyzer can select the fuel such Gasoline, LPG, CNG, and Alcohol. GASOLIN ALCOHOL ①...
QRO-402 6-5. NO setup It is a function selecting where to attach NO sensor. ① Press MENU key for eight times in standby mode. λ AFR/NO (When it is set up to NO display) ② ▲ key changes display to YES or to NO.
Note QRO-402 is converted into the standby mode unless you convert into other modes within 30 seconds during the standard gas calibration. If you decide that the standard gas calibration is in the wrong process, press [ESC] key to restart the process.
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QRO-402 ② Press MENU key nine times. ENTER ZERO PURGE PRINT MENU ③ The following message is indicated. QRO-402 operates according to the ▼ ▲ ENTER printed on the upper part of each key. λ AFR/NO ④ Press ENTER key in the above state. The [Zero calibration] starts automatically for once.
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QRO-402 ⑤ When the [Zero calibration] is completed, the values will be indicated on the indication window as shown and the value in the first digit will blink. λ AFR/NO ⑥ The ▲ key makes the blinking number increased. After the setup of the required ▼...
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[Zero calibration] and returns to the standby mode. ⑨ If the gas calibration fails, the message [FAIL] is indicated on each concerned window. Press the ENTER key. QRO-402 will perform the [Zero calibration] and will return to the standby mode. λ AFR/NO (It is succeeded in HC and CO2 calibration but failed in CO, O2 calibration.)
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