Rae QRAE PLUS PGM-2000, Руководство по эксплуатации и техническому обслуживанию

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PROGRAMMING
4-8
Calibration Time Stamp
When a single or multiple sensor span calibration is performed,
a time stamp will be stored in the non-volatile memory. This
information will be included in the datalogging report.
4.3.1. Fresh Air Calibration
This procedure determines the zero point of the sensor
calibration curve. To perform a fresh air calibration, the
calibration adapter and a cylinder of “fresh” air (optional) are
required. The “fresh” air is clean dry air with 20.9% oxygen
concentration and without any organic, toxic or combustible
gases or impurities. If such an air cylinder is not available, any
clean ambient air without detectable contaminants can also be
used. A charcoal filter should be used if one is not sure of the
ambient air’s purity.
After pressing the [Y/+] key at “Calibrate Monitor?”, the “Fresh
Air Calibration?” screen will appear. Press [Y/+] to perform
zero calibration.
When the zero calibration is successful, the display should
show a reading of “20.9” for the oxygen sensor and “0.0,” or a
very small number, for all other sensors.
4.3.2. Multiple Sensor Calibration
This function simultaneously determines the second point of the
calibration curve for multiple sensors in the monitor.
A cylinder of mixed standard reference gases is needed to
perform this procedure. The user can choose several gas
mixtures* to be used in multiple-sensor calibration.
1. When the display shows “Multiple Sensor Calibration?”
Press the [Y/+] key. The display shows all the pre-selected
gases for the mixed gas cylinder and the question “OK?”