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Up to eight custom gases are in the library. Scroll through the choices by pressing [Y/+], and then
select the custom gas configuration by pressing [MODE] to highlight it. With “Save” highlighted,
press [Y/+] to save your choice.
If you choose from the Gas Library, press [Y/+] to scroll through the list, and then press [MODE]
to make your selection. With “Save” highlighted, press [Y/+] to save your choice. The gas is
saved, and then the screen briefly shows the Correction Factor applied to that gas by the QRAE 3.
Note:
The Gas Library contains many gases. To rapidly scroll through the list, press and hold
[Y/+].
8.3.2.8. Set Span Value
You can individually set the span gas value for each sensor. The units of measure (ppm, %LEL,
etc.) are shown on the display.
Press [MODE] to scroll through the list of active sensor names. Then press [Y/+] to select one.
Set the span value by pressing [Y/+] to increase a value, and pressing [MODE] to advance
through the digits.
Once your span value is input, press [MODE] to advance and highlight “OK.” Press [Y/+] to
register the change and to advance to the next sensor in the list.
When you reach the end of the list, press [MODE] to highlight “Exit,” and then press [Y/+] to
select it.
8.3.3. Measurement
The submenus for Measurement include Sensor On/Off, Change Measurement Gas, and LEL
Measurement Units.
8.3.3.1. Sensor On/Off
You can turn sensors on or off via this set of submenus. An “X” in a box to the left of a sensor’s
name indicates it is turned on.
1. Press [MODE] to advance down the list of sensors.
2. Press [Y/+] to select/deselect a sensor.
3. Press [MODE] until “Exit” is selected.
4. Press [Y/+] to save your selection and exit to the Measurement menu.
8.3.3.2. Meas. Unit
The measurement unit for displaying data from sensors can be changed. Your options are ppm
(parts per million) mg/m3 (milligrams per cubic meter), and μmol/mol (micromoles per mole).
1. Press [MODE] to move between measurement units.
2. Press [Y/+] to select a measurement unit.
3. Press [MODE] until “Exit” is selected.
4. Press [Y/+] to save your selection and exit to the Measurement menu.