MultiRAE User’s Guide
61
10.3.4 Single-Sensor Zero Calibration
Select the sensor and then start the calibration by pressing [Y/+]. You can abort the procedure anytime by
pressing [N/-].
10.4 Span Calibration
This procedure determines the second point of the sensor calibration curve for the sensor.
Note: When a manual calibration is performed, the readings shown are in the equivalent units of the
calibration gas, and not the measurement gas.
10.5 Three-Point Calibration For Enhanced Linearity With Extended-
Range And ppb PID Sensors
For better linearity at higher concentrations when a MultiRAE is equipped with a PID sensor, a 3-point
calibration can be performed.
IMPORTANT!
Three-point calibration is disabled by default, but can be enabled using ProRAE Studio II Instrument
Configuration and Data Management software on MultiRAE and MultiRAE Pro instruments with 10.6eV
PID sensors, including high-range ppm and ppb PID sensors. The MultiRAE Lite PID sensor does not
support three-point calibration.
Default calibration gas settings for MultiRAE PID sensors are as follows:
Span 2
(Third calibration
point, if enabled)
MultiRAE Pro
parts-per-billion
(ppb) PID
0 to 2,000 ppm range,
10 ppb resolution
With a charcoal
filter or VOC
zeroing tube
MultiRAE
extended-range ppm
PID
0 to 5,000 ppm range,
0.1 ppm resolution
MultiRAE Lite PID
(same as the
ToxiRAE Pro Safety
Configuration PID)
0 to 1,000 ppm range,
1 ppm resolution
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