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CALIBRATION
All units are shipped factory calibrated. Factory calibration certificates are saved on the SD card included
with your device.
Over time all sensors require recalibration to maintain their accuracy and repeatability. When it is time to re‐
calibrate, end users have two choices: field/self‐calibration OR returning the device to CO2Meter for factory
calibration.
WHY IS CALIBRATION REQUIRED?
Our Sampling Data Loggers use highly accurate and technologically advanced sensors. These rely on a variety of
technologies to detect and measure the concentrations of your desired gas. Over time, these technologies can
deteriorate to the point that they must be moved back to a standard point of reference.
To combat sensor drift, a well‐planned and documented process is used to return the sensor as close to
its intended operational state as possible.
1 POINT & 2 POINT CALIBRATION
There is a distinguishable difference between 1‐point and 2‐point calibration methods. One‐point sensor
calibration involves applying one reference gas, whereas 2‐point calibration is done by provided two reference
gases to the device for the sensor to stabilize or move back to a standard point of reference.
For 1‐point calibration, the most accurate method is to expose the device to pure 100% nitrogen to accurately
stabilize the sensor. CO2Meter utilizes 2‐point calibration prior to shipping each CM‐1000 device. This method
is much more comprehensive and should only be followed if you are an advanced user. We recommend that
the CM‐1000 series be calibrated, annually.
(
See step‐by‐step CM‐1000 1 Point Calibration guide below page. 12
)
As mentioned, for 2‐point calibration CO2Meter requires that this method be performed if you are an advanced
or experienced user who has performed this method multiples times prior.
We recommend contacting CO2Meter for the 2‐point calibration guidelines or reach out to us directly to
calibrate the device at a nominal fee. You can reach us directly at,
or (877) 678 ‐ 4259.
