Rae MiniRAE 2000 PGM-7600 Operation And Maintenance Manual

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Rae MiniRAE 2000 PGM-7600 Operation And Maintenance Manual Manual pdf 73 page image

PROGRAMMING4-354.7.10 Change Dilution RatioIf a dilution system is used upstream of the MiniRAE 2000 inletport, the user can enter the dilution ratio (from 1 to 10) tocompensate the readings. The unit will then display the actualconcentration of the gas before dilution. The dilution ratioshould be 1 in normal operation where no dilution gas is appliedto the sample gas. Dilution improves accuracy and linearitywhen the concentrations are above a few thousand ppm.1. “Change Dilution Ratio?” is the tenth sub-menu item in theMonitor Setup menu.2. Press the [Y/+] key; the display shows the current dilutionratio: “Dilution Ratio = xx” with the left most digit flashing.3. Press the [Y/+] or [N/-] key to increase or decrease thevalue of the digit. Press [MODE] momentarily to advanceto the next digit. The flashing digit will move to the nextdigit to the right. Repeat this process until both digits of thenew dilution ratio are entered.4. Press and hold the [MODE] key for 1 second to exit thedata entry mode and move to the next sub-menu.5. If there is any change to the existing dilution ratio, thedisplay shows “Save?” Press [Y/+] to confirm the new valueor press [N/-] or [MODE] to discard the changes and moveto the next sub-menu.