Related information
Sample calibration certificates
4.1.1 Calibration factors
The original calibration factors are obtained from factory calibration, and are unique to
each device. They are used to adjust measurements for the specific physical properties of
the device.
Contents of the calibration certificate
The calibration certificate contains several sets of factors:
Density calibration
coefficients
Define the relationship between density and the response
of your sensor
Temperature
compensation coefficients
Adjust density measurement for the effect of temperature
on sensor response
Pressure compensation
coefficients
Adjust density measurement for the effect of pressure on
sensor response
Flow compensation
coefficient
Adjusts density measurement for the effect of flow on
sensor response
The calibration certificate also provides the results of the Known Density Verification
procedure that was performed at the factory.
For each calibration performed at the factory, the calibration certificate contains the data
used to calculate the calibration coefficients.
CDM format and legacy format (A factors and K factors)
The calibration factors are provided on three calibration certificates:
• The first certificate provides the calibration factors in the CDM format, A
n
, in SI units.
These are obtained from factory calibration of your device.
• The second certificate provides the calibration factors in the legacy format, K
n
, in SI
units. These factors represent the current calibration factors converted to the
format used by the 7835 and 7845 meters.
• The third certificate provides the calibration factors in the legacy format, K
n
, in
imperial units. These factors represent the current calibration factors converted to
the format used by the 7835 and 7845 meters, and then converted to imperial units.
If you have existing programs that use the K factors, update your programs with the new K
values in the appropriate units. In all other situations, use the A-format calibration factors.
Related information
Sample calibration certificates
Configure process measurement
22 Micro Motion
®
Compact Density Meters (CDM)
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