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WARNINGS: Measure Stability and Battery Discharge
Measure Stability (Drift)
The MPP3wifi probe is a useful geophysical instrument that will help you to get the information that
you need to design an appropriate geophysical survey. In order to obtain stable values (which should
be around 0) and avoid signal drift, it is highly recommended to leave the probe ON during one hour
before taking the first measurement. After one hour, you must re-initialize the probe and then, you
are ready to take measurements. To minimize the drift once you have started to take measurements,
you should initialize the probe every 1, 5, 10 or 15 minutes. By default, the option 1 minute between
every initialization is activated.
If you prefer to take measurements right after turning on the probe, we suggest that you initialize the
probe every minute or, for best results, before each reading for the first 30 to 60 minutes.
This preventive procedure decreases the risk to take erroneous values that would be caused by
weather variations or by other external causes that lead to a drift of the instrument. It is therefore
very important to often re-initialize in order to maintain the «0» base value used in the calculation of
the displayed values. Please take note that the values are much more stable after 20 minutes and are
completely stable after 50 to 60 minutes.
Battery Discharge
*** When the level of the AA batteries charge is low, readings may become inaccurate and you may
not be able to initialize the probe.
The specifications described in this Instruction Manual are valid at temperatures between 0°C and
70°C. At temperatures lower than 0°C, some specifications, such as the batteries life, may differ.
Instrumentation GDD inc.
2017-08-21
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