Reflex PID Technology™
All handheld PID monitors after firmware version 2.20 benefit from our patented Reflex PID
Technology™. It provides several benefits, including enhanced stability and accuracy,
particularly at very low levels. One time each hour, Reflex PID™ Technology adjusts the zero
point automatically to ensure greater uniformity in readings, especially when detecting ultra-
low levels (ppb range) of VOCs. This one-minute operation is performed automatically, so
precise readings are assured without requiring the user to perform zeroing.
Reflex PID technology is automatically enabled during each zero calibration process. For the
ppbRAE3000+, it performs a sensor noise level assessment to re-baseline zeroing of the
instrument and provide ultimate performance at sub-ppm level.
The instrument’s user can decide to abort this operation by pressing [N/-], should this process
need to be interrupted for a measurement.
Span calibration
This procedure determines the second point of the sensor calibration curve for the sensor. A
cylinder of standard reference gas (span gas) fitted with a 500 cc/min. flow-limiting regulator
or a flow-matching regulator is the simplest way to perform this procedure. Choose the 500
cc/min. regulator only if the flow rate matches or slightly exceeds the flow rate of the
instrument pump. Alternatively, the span gas can first be filled into a Tedlar bag or delivered
through a demand-flow regulator. Connect the calibration adapter to the inlet port of the
instrument, and connect the tubing to the regulator or Tedlar bag.
Another alternative is to use a regulator with >500 cc/min flow but allow the excess flow to
escape through a T or an open tube. In the latter method, the span gas flows out through an
open tube slightly wider than the probe, and the probe is inserted into the calibration tube.
At the Span Calibration menu, you perform a Span calibration. You may also go back to the Zero
calibration menu or to the initial Calibration menu if you want to exit calibration.
l
Press [Y/+] to enter Span calibration.
l
Press [N/-] to skip Span calibration and return to Zero calibration.
l
Press [MODE] to exit Span calibration and return to the top calibration menu.
Handheld PID Monitors 62 User Manual
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