Span Calibration; Three-Point Calibration For Enhanced Linearity With Extended-Range And Ppb Pid Sensors - Honeywell AreaRAE Plus User Manual

AreaRAE Plus & AreaRAE Pro User's Guide

15.3 Span Calibration

This procedure determines the second point of the sensor calibration.
Note: When a manual calibration is performed, the readings shown are in the equivalent units of the
calibration gas, and not the measurement gas.
15.4 Three-Point Calibration For Enhanced Linearity With Extended-
Range And ppb PID Sensors
For better linearity at higher concentrations when an AreaRAE Plus/Pro is equipped with a PID sensor, a
3-point calibration can be performed.
Three-point calibration is disabled by default, but can be enabled using ProRAE Studio II Instrument
Configuration and Data Management software on AreaRAE Plus/Pro instruments with 10.6eV PID
sensors, including high-range ppm and ppb PID sensors.
Default calibration gas settings for AreaRAE Plus/Pro PID sensors are as follows:
Sensor Specifications
AreaRAE Plus/Pro 0 to 2,000 ppm
parts-per-billion range, 10 ppb
(ppb) PID resolution
AreaRAE Plus/Pro 0 to 5,000 ppm
extended-range ppm range, 0.1 ppm
PID resolution
AreaRAE Plus/Pro 0.1 to 2,000 ppm;
9.8eV PID 0.1 ppm resolution
IMPORTANT!
Zero
With a 10 ppm Isobutylene
charcoal
filter or VOC
zeroing tube
Fresh air or 100 ppm Isobutylene
dry air
Fresh air or 100 ppm Isobutylene
dry air 5 ppm Benzene
70
Span Span 2
(Third
calibration point,
if enabled)
100 ppm
Isobutylene
1,000 ppm
Isobutylene
Not supported