Checking Calibration - Bartington MS2 Operation Manual

5. Insert the probe into the hole so that the lowest (sensing) graduation mark is at ground level
(i.e. depth = 0mm) and press 'M' to perform a reading. Hold the probe steady until the meter
beeps to indicate that the reading has been taken. Record the reading against 'depth = 0' on
your results table.
6. Lower the probe by the desired reading depth interval (using the graduated depth scale on
the probe/tube) and press 'M' to take the next reading. Record the reading on your results
table.
7. Continue this process until all readings to the desired depth have been recorded.Readings
can also be taken as the probe is extracted from the hole.
8. Remove the probe from the hole, clean it, and perform a final reading in air. Record this
reading as the end of measurement zero drift. For best accuracy results, you should now
calculate a drift correction for each reading, assuming that the 'air' zero reading has drifted
linearly with time from 0 (at the start) to your final 'air' reading.

13.4. Checking Calibration

A sample is provided to allow an approximate check on the calibration of the probe.
To use the sample, select 1.0 range and SI on the meter.
Put meter toggle switch to the centre position, hold the probe in air clear of other objects, and
press the 'Z' button to zero the meter.
If meter correctly zeroes, put the toggle switch to the left (M) position. The meter will start
continuous measurements. Insert the probe into the calibration sample and slowly vary the
depth to obtain a maximum reading. The maximum reading should be within the ± tolerance
range printed on the sample label.
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