ECOPROBE 5 - rs dynamics

Calibration interval depends on the absolute accuracy required and on the dust condition of surveyed terrain.
Even though filters are used, the PID unit may accumulate dust and the calibration procedure must
be repeated.
Calibration intervals:
CALIBRATION
To extend the “Single Point” calibration and cleaning interval of the PID analytical
unit the operator has to use a dust filter inserted between ECOPROBE 5 gas
inlet and the sampling probe. The filter should be changed depending upon the
amount of dust and extent of contamination of the measuring environment. If
heavily contaminated soil gas was drawn into the instrument, the filter should be
changed before starting the next measurement.
To determine the extent to which a filter is contaminated, set up a locality for test
measurements and measure the filter contamination in the routine way. After the
resetting period, connect only the filter by means of a short piece of tubing and
measure. The degree of contamination will indicate if the filter should be replaced.
Filters are consumable items which can be purchased from service stations e.g.
Shell, or from automotive spares shops.
� From 1 to 6 months if not working in dusty environment and using dust filters.
� Once a week if working in a dusty environments with dust filters.
� Every day if precise quantitative values are required.
The ECOPROBE 5’s accessories include a calibration kit for PID Single Point calibration consisting of:
� Cylinder with calibration standard -- LINDE 100 ppm Isobutene (Isobutylene and/or
Isobuthylene is the same compound) mixed with synthetic air. Content of the cylinder (2l/150 atm) is
sufficient for about 200 calibrations if the gas is not wasted.
Calibration gas refills may be purchased from any company providing calibration standard gases for gas
chromatography (Air Products, SIAD, LINDE and others).
� Calibration valve for releasing the gas from the cylinder.
� LINDE plastic/metal bag and valve for collecting gas from the cylinder.
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