Temperature Considerations - Geosense MEMS DPI I Instruction Manual

MEMS Digital Portable Horizontal Inclinometer
V1.1
09/02/2022

10.3. Temperature Considerations

Geosense® has carried out significant research into temperature effects on the
Probe and its electronics and has found that the thermal effects are very small.
However, at the beginning of a survey it is strongly recommended that the
temperatures in the probe be allowed to 'normalise', (referred to as the stabilising
period) thereby removing temperature gradients within the MEMS circuitry.
Where the probe is used in an inclinometer access tube in a borehole or other
subsurface structure, there is usually little variation in temperature over the length of
borehole, so thermal effects will be small and corrections will not be necessary.
However, if the probe is subjected to rapid temperature changes, the readings may
be affected. Thermal influences are complex. The effect of temperature changes on
the MEMS sensor are generally insignificant, but this relates purely to the 'sensor' on
the circuit board, inside the probe. Effects on the body of the probe, together with
the structure into (onto) which the tubing is installed, will be very complex and
difficult to quantify. Consequently, reliable compensation for such changes would
unreliable, so are not considered of value.
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