To Next Page

To Previous Page

8.3.3.3. LEL Meas. Gas

Note: The LEL Measurement Gas option is only available if an LEL sensor is installed.

The QRAE 3 has extensive onboard gas libraries for combustible gases that you can use to

configure your instrument to automatically apply the appropriate correction factors and produce

readings in the units of the desired combustible gas.

LEL measurement gases are organized in two lists:

 Custom Gases are gases with user-modified parameters. Using ProRAE Studio II, all

parameters defining a gas can be modified, including the name, span value(s), correction

factor, and default alarm limits.

 Gas Library is a library that consists of many of the gases found in RAE Systems’ Technical

Note TN-156 (available online at www.raesystems.com). Methane is the default gas.

Choose Custom Gases or Gas Library by pressing [MODE], and then press [Y/+] to make your selection.

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.

Note: The Gas Library contains many gases. To rapidly scroll through the list, press and hold [Y/+].

8.3.3.4. Alarms

Use this menu to change high, low, STEL, and TWA alarm limits - the points at which alarms are

triggered. It can also change alarm mode (latched or automatic reset) and alarm output methods

(combinations of light, buzzer, and vibration alarm indications).

8.3.3.5. Alarm Limits

There are four groups of alarm settings that you can adjust for each individual sensor for which a

particular alarm type is available.

Settings:

 High Alarm

 Low Alarm

 STEL Alarm

 TWA Alarm

Note: Some alarm settings are not applicable to all sensors. If a setting is irrelevant to a sensor (in

some cases STEL or TWA are not relevant to a sensor), then that sensor does not appear in the

list for alarm limits.

Rae QRAE 3 User Manual

Other manuals for Rae QRAE 3