Rae QRAE 3 User Manual

Also see for QRAE 3: Quick start guide

Rae QRAE 3 User Manual Manual pdf 40 page image

3710.4.3 Multi-Sensor Span CalibrationThis lets you perform a span calibration on multiple sensors simultaneously. It requires using theappropriate span gas and that the concentration labeled on the gas cylinder matches theconcentration programmed in the QRAE 3.1. Start the flow of calibration gas.2. Attach the calibration adapter and gas to the QRAE 3.3. Press [Y/+] to begin calibration. A countdown screen is shown. You can abort thecalibration at any time during the countdown by pressing [MODE].If the calibration reaches its conclusion, it shows the sensor names and tells you whether thecalibration passed or failed, followed by the sensor readings.10.4.4. Single-Sensor Span CalibrationTo perform span calibration of an individual sensor, follow these steps:1. At the Calibration Menu, select “Single Sensor Span.”2. Select a sensor from the list.3. Start the flow of calibration gas.4. Connect the calibration adapter and connect it to a source of calibration gas.5. Verify that the displayed calibration value meets the concentration label on the gascylinder.6. Press [Y/+] to start calibrating. You can abort the calibration at any time during thecountdown by pressing [MODE].After a timer countdown, the span calibration is done. The LCD will display whether thecalibration was successful and the reading for that calibration gas.Note: If the sensor calibration fails, try again. If calibration fails again, turn off the power andthen replace the sensor.WARNING: Do not replace sensors in hazardous locations