Rae ToxiRAE Pro User Manual

Contents

Rae ToxiRAE Pro User Manual Manual pdf 48 page image

ToxiRAE Pro User’s Guide461. At the Calibration screen, press [Y/+].2. “Zero Calib” is highlighted. Make sure the ToxiRAE Pro is in clean air.Otherwise attach a cylinder of zero gas to the Calibration Adapter installed on theinstrument.3. Press [Y/+]. The message “Apply zero gas…” is displayed.4. Start the flow of the zero gas (if used) and press [Y/+] to start the zero calibration.5. There is a 60-second countdown, during which time the screen shows the word“Zeroing…” and the countdown.6. Upon completion, it says “Zeroing is done! Reading = 0.0ppm” along with thereading (it should be 0.0 ppm or very close to it).7. “Span Calib” is highlighted.Note: You can abort the zero calibration during its countdown by pressing the [MODE] key.Important! If you used the Calibration Adapter and a zero air cylinder, you must removethe Calibration Adapter from the ToxiRAE Pro. If the Calibration Adapter is attachedduring normal operation, inconsistent and lower-than-normal readings will occur becauseof decreased concentration of the gas being monitored.14.4. Span CalibrationThis procedure determines the second point of the sensor calibration curve for the sensor.To begin calibration, connect the calibration gas cylinder, flow regulator, and calibrationadapter to the ToxiRAE Pro.With the ToxiRAE Pro in Programming Mode, and with Span Calib highlighted, followthis procedure:1. Press [Y/+]. The screen displays the current (or default) calibration gas and itsconcentration. For example:Cal. Gas: COSpan=50ppmChange?• Press [MODE] if you do not want to change it.• Press [Y/+] if you want to change it.If you entered the Calibration Menu without supplying the correct password, orsupplied the correct password but chose not to change the Cal.Gas, you will see amessage like this:Cal.Gas: COSpan=50ppmApply gas…2. Press [Y/+] to start calibration.