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8.3.2. Calibration
Use this menu to perform zero or span calibration for one or more sensors, and change the gas
concentration value assumed to be used in span calibration, as well as zero calibration and calibration
reference gas.
8.3.2.1. Multi Bump
Depending on the configuration of your QRAE 3 and the span gas you have, you can perform a
bump test simultaneously on multiple sensors.
The selected sensors and their values are shown on the screen. With calibration gas connected to
the instrument, start a multiple bump test by pressing [Y/+]. If you do not want to perform a
multiple bump test, press [MODE].
Note:
You can abort a multiple bump test by pressing [MODE] once testing has started.
When the Multi Bump test is done, a screen is shown, with the sensor names and either “Pass” or
“Fail” shown next to them.
8.3.2.2. Multi Zero
You can perform a zero calibration simultaneously on multiple sensors. This procedure
determines the zero point of the sensor calibration curve for all the sensors that require a zero
calibration. The instrument should be zero calibrated in clean ambient air with 20.9% oxygen. A
zero calibration should precede a span calibration.
The selected sensors are shown on the screen. Start a multiple zero test by pressing [Y/+]. If you
do not want to perform a test, press [MODE].
Note:
You can abort a multiple zero test by pressing [MODE] once testing has started.
When the Multi Zero test is done, a screen labeled Calibration Results is shown, with the sensor
names and either “Pass” or “Fail” shown next to them.
8.3.2.3. Multi Span
Depending on the configuration of your QRAE 3 and the span gas you have, you can perform a
span calibration simultaneously on multiple sensors.
The selected sensors and their values are shown on the screen. With calibration gas connected to
the instrument and turned on, start a multiple span calibration by pressing [Y/+]. If you do not
want to perform a multiple span calibration, press [MODE].
Note:
You can abort a multiple span calibration by pressing [MODE] once testing has started.
When the Multi Span calibration is done, a screen labeled Calibration Results is shown, with the
sensor names and either “Pass” or “Fail” shown next to them.
8.3.2.4. Single Bump
You can perform a separate bump test on each individual sensor.
The active sensors’ names are shown in a list. Press [MODE] to highlight the sensor you want to
bump test, and then press [Y/+] to select it.