UM-ITAG4-160217 REV.D
ERROR CODES
Error codes usually could be found on the upper left corner of a PDF report created by data logger, if you find
an error code in a data report, it means data logger detected an exception related to recording.
Code 0004 (*0004),
logger used to be reset during recording, which may cause missing of data point.
Code 0005 (*0005),
an internal time error is detected when activating a logger, to avoid creating incorrect
data record, logger would not be activated in this case until new configuration is carried out.
MKT
MKT (Mean Kinetic Temperature) is a simplified way of expressing the overall effect of temperature fluctuations during
storage or transit of perishable goods. Calculation,
𝑇𝑚𝑘𝑡 =
ΔE/R
−ln(
𝑒
−
∆𝐸
𝑅𝑇1
+ 𝑒
−
∆𝐸
𝑅𝑇2
+ ⋯ + 𝑒
−
∆𝐸
𝑅𝑇𝑛
𝑛
)
Δ
E = activation energy (
standard value: 83.144 kJ/mol
)
R = 8.314472 J/mol (universal gas constant)
T = temperature in degrees K
n = the number of sample periods over which data is collected
Note: ln is the natural log and ex is the natural log base.
The pharmaceutical and food industries are two closely regulated markets. The FDA provides regulations that require
warehouse and shipment temperatures to be closely controlled and monitored. In addition, the FDA requires well-
documented verification of these storage environments and any corrective actions taken if temperatures exceed
specified storage conditions.
